JPH10316228A - Electronic part detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic part detecting device capable of securely detecting a minute electronic part, and also capable of detecting the clogging of parts on the basis of the detection signal. SOLUTION: It is contrived that one sensing signal is sent to an one-shot multivibrator 9 and to an OR circuit 10 from a part sensor 8 each time an electronic part P passes, and at the same time that only one single signal having a prescribed time width is sent to the OR circuit 10 from the one-shot multivibrator 9 that have received the sensing signal, and that a logical OR signal is output from the OR circuit 10 as a detection signal. Thus, when the time width of the detection signal is short, since the single signal becomes the detection signal, a minute electronic part can be securely detected, and also when there is a clogging of parts, since the detection signal is not extinguished, parts clogging on the basis of the detection signal can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an electronic component detecting device for outputting a detection signal when an electronic component passes a predetermined position on a component moving route.

[0002]

2. Description of the Related Art One of electronic device detecting devices installed at a component inlet of an electronic component sorting device and used for confirming that an electronic component has been taken in has been proposed. For example, each time an electronic component moves through the component introduction route and passes through the component inlet, a detection signal is output from the electronic component detection device, and the controller responds to the detection of the electronic component, and the controller selects the electronic component selection device. There is a configuration in which necessary command control is performed for the In such an electronic component detection device, since the electronic component normally passes through the component intake in a short time, the sensing signal output from the component sensor unit of the electronic component detection device disappears in a very short time. Is short. In particular, when the electronic component is minute, the time width of the signal output from the component sensor unit is further reduced, and there is a possibility that an electronic component detection error may occur. For this reason, the sensing signal output from the component sensor unit is made to pass through the one-shot multivibrator so that a detection signal having a sufficient time width is always output.

However, a conventional electronic component detection device that outputs a detection signal of an electronic component by extending a sensing signal from a component sensor section with a one-shot multivibrator cannot detect that a component clogging has occurred. There is a problem. In other words, if a component jam occurs, the sensing signal will continue to be output forever,
Since the detection signal output from the one-shot multivibrator disappears after a preset time has elapsed, in the conventional electronic component detection device, the output form of the detection signal is the same regardless of whether or not the component is clogged. Therefore, even if the parts are clogged, it is not possible to detect that the parts are clogged based on the detection signal.

The present invention has been made to solve the above problems, and can reliably detect even minute electronic components.
Moreover, an object of the present invention is to provide an electronic component detection device capable of reliably detecting that component clogging has occurred based on a detection signal.

[0005]

In order to achieve the above object, an electronic component detection device according to the present invention provides an electronic component detection device that outputs a detection signal when an electronic component moving on a predetermined component movement route passes a predetermined position. A component detection device, comprising: component sensor means for outputting a sensing signal while an electronic component is at a predetermined position on the component moving route; and a predetermined time width each time one sensing signal is received from the component sensor means. A single-shot signal generating means for outputting one single-shot signal, and a logical-sum operation means for outputting the sensed signal and the single-shot signal as input signals and outputting a logical sum signal of both signals as the detection signal. I have.

In addition, the component sensor means and the single-shot signal generating means are directly connected to a controller responsive to the detection of the electronic component, and the OR operation means is incorporated in a computer program for controlling the controller in advance. It is characterized by being configured as an OR operation process.

The controller is connected to component sensor means and single-shot signal generation means of a plurality of electronic component detection devices, and includes, as a logical sum operation means for each electronic component detection device, in a control computer program. It is characterized in that a logical sum operation process is incorporated in advance.

Further, the single-shot signal generating means is a one-shot multivibrator.

[0009]

In the electronic component detection device according to the present invention, when the electronic component has passed a predetermined position on the component movement route, a sensing signal is sent from the component sensor to both the single-shot signal generating means and the OR operation means. At the same time, the one-shot signal generating means receiving the sensing signal simultaneously sends a single-shot signal having a predetermined time width to the logical sum calculating means. Further, the logical sum operation means to which both the sensing signal and the one-shot signal are input,
The logical sum signal of both signals is output as a detection signal. As a result, if the time width of the sensing signal is shorter than the time width of the single-shot signal, the single-shot signal is output as the detection signal. Conversely, if the time width of the sensing signal is longer than the single-shot signal, the sensing is performed. The signal is output as a detection signal.

On the other hand, when a minute electronic component passes a predetermined position on the component movement route in a short time, the existence time of the electronic component at the predetermined position is extremely short. The sensing signal from the component sensor means that outputs the sensing signal is a signal having a very short time width. On the other hand, the single-shot signal from the single-shot signal generation means is always a signal of the same time width that is set in advance. As a result, when the minute electronic component passes through the predetermined position in a short time, the time width of the sensing signal becomes shorter than the time width of the single signal, so that the single operation signal is output as a detection signal from the OR operation means. . That is, even when a minute electronic component passes through a predetermined position in a short time and only a sensing signal having a very short time width is output from the component sensor means, a single-shot signal having a sufficient time width is finally detected as a detection signal. Is output as

If the electronic component continues to stay at a predetermined position on the component movement route due to component clogging, the component sensor means continues to output a sensing signal. On the other hand, the single-shot signal from the single-shot signal generation means is a signal having the same time width set in advance, and disappears after the set time elapses. As a result, the time width of the sensing signal becomes longer than the time width of the one-shot signal, and the sensing signal is continuously output as the detection signal from the OR operation means. Therefore, if there is a component clogging, the sensing signal will continue to be output as a detection signal from the OR operation means even after the time corresponding to the preset time width of the single-shot signal has elapsed, and this detection signal Thus, it is possible to reliably detect the component clogging based on the information.

In the case where the logical sum calculating means of the electronic component detecting device is constituted by software as a logical sum calculating process previously incorporated in a control computer program of a controller responding to the electronic component detection, The hardware for the sum calculation means is not required, and it is possible to reduce the number of parts.

Further, when each of the logical sum calculating means of the plurality of electronic component detecting devices is configured in software as a logical sum calculating process executed inside the controller, a hardware for each logical sum calculating means is used. This eliminates the need for all hardware, and makes it possible to reduce the number of components in each electronic component detection device.

When a one-shot multivibrator (hereinafter abbreviated as "one-shot multi") is used as a single-shot signal generating means, the one-shot multi can be easily obtained on the market as a general-purpose electronic component. Since the device is a simple device, cost can be reduced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] FIG. 1 is a diagram showing an electronic component selection system using an electronic component detection device according to an embodiment of the present invention. In the electronic component sorting system of this embodiment, electronic component detection devices are provided at the component inlet and the component outlet of the (electronic component) sorting device. There are no special restrictions on the type and selection form of electronic components to be selected in the electronic component selection system.For example, a capacitor is an example of a selection target, and the selection type is an inspection for the presence or absence of scratches on the component surface. Sorting for distinguishing non-defective / defective products, and sorting for performing capacity-based ranking based on the result of measuring the capacitance value and the like.

In the electronic component sorting system shown in FIG.
The electronic component detection devices 1 and 1 are disposed at a component inlet (predetermined position) 3 and a component outlet (predetermined position) 4 of the sorting device 2, respectively, and electronic component detection by each electronic component detecting device 1 is performed. And a controller 5 for performing necessary command control for the sorting device 2 is provided.
Hereinafter, the configuration of each unit will be specifically described.

At one end of the sorting device 2, a component introduction route (component moving route) 6 preset by a belt conveyor or the like is provided, and electronic components P,.
P is configured to move along the component introduction route 6 and be taken into the sorting device 2 from the component inlet 3. Also, a component deriving route (component moving route) preset by a belt conveyor or the like is provided on the other end side of the sorting device 2.
, P are arranged from the component outlet 4 so that the selected electronic components P,.

Each of the two electronic component detection devices 1 installed at the component inlet 3 and the component outlet 4 has the same configuration. A component sensor unit (component sensor means) 8 that outputs a sensing signal while P is present, and a one-shot multi (single-shot signal generation) that outputs one single-shot signal of a preset time width every time one sensing signal is received. Means) 9 and an OR circuit (logical sum operation means) 10 which receives the sensing signal and the single-shot signal as input signals and outputs a logical sum signal of both signals as a detection signal. The component sensor unit 8 uses a photoelectric object sensing unit, a capacitance object sensing unit, or the like.

The controller 5 receives the detection signal sent from the electronic component detection device 1 and sends a command control signal necessary for the selection process to the selection device 2 based on the received detection signal. Alternatively, a configuration is provided in which a component clog is detected and an alarm is issued. In the system shown in FIG. 1, the sorting device 2 and the controller 5 are configured separately, but the controller 5 may be incorporated in the sorting device 2 to integrate the two.

Next, the component detection operation of the electronic component detection device 1 in the electronic component selection system configured as described above will be described with reference to FIGS. Since the component detection operations of the two electronic component detection devices 1 are the same,
Here, the electronic component detection device 1 installed in the component inlet 3 will be described.

Each time one electronic component P passes through the component inlet 3, the component sensor 8 of the electronic component detection device 1
As shown in FIG. 2A, one pulse-shaped sensing signal Sa having a time width Ta is sent to the one-shot multi 9 and the OR circuit 10, and at the same time, as shown in FIG. From the one-shot multi 9 receiving the signal Sa, the one-shot signal Sb having the preset time width Tb is 1
Are sent to the OR circuit 10. Then, the single-shot signal S
If the time width Tb of b is longer than the time width Ta of the sensing signal Sa, as shown in FIG.
, The single-shot signal Sb is sent to the controller 5 as the detection signal Sc.

The time width Ta of the sensing signal Sa is directly proportional to the size of the electronic component P and inversely proportional to the moving speed. Therefore, when the minute electronic component P passes through the component inlet 3 in a short time, the time width Ta of the sensing signal Sa becomes extremely short. However, when the time width Ta is shorter than the time width Tb, O
Since the one-shot signal Sb is always output as the detection signal Sc from the R circuit 10, even if the minute electronic component P passes through the component inlet 3 quickly, the detection signal Sc having the time width Tb (= Tc) is always generated. Is output. As a result, the electronic component P is reliably detected, and the controller 5 does not malfunction.

Normally, in consideration of the size and moving speed of the electronic component P to be sorted, the maximum value of the time width Ta of the sensing signal Sa when the electronic component P normally moves is determined by the single-shot signal S.
A one-shot multi 9 in which the time width is set so that the time width Tb of b slightly exceeds is used. Therefore, when the electronic component P is moving normally, the time width Ta always becomes shorter than the time width Tb, and the single-shot signal Sb becomes the detection signal Sc.
Therefore, the time width of the detection signal Sc is always the same as the time width Tb of the single-shot signal preset in the one-shot multi 9. Since the size and the moving speed of the electronic component P to be sorted usually differ depending on the type of the electronic component P, it is desirable to use a one-shot multi 9 that can change a set time width. .

As shown in FIG. 3, when a component is clogged in the component inlet 3 and the electronic component P stays in the component inlet 3, a sensing signal Sa is output as shown in FIG. Will continue. On the other hand, the one-shot multi 9 outputs one single-shot signal Sb having a normal time width Tb, as shown in FIG. Therefore, as shown in FIG. 4C, the OR circuit 10 outputs the sensing signal Sa having an infinite time width as the detection signal Sc.

In the controller 5, one detection signal Sc
Is measured, and the duration is compared with the reference time. In the controller 5, a reference time obtained by adding a predetermined time to the time width Tb of the single-shot signal Sb in consideration of a predetermined fluctuation width is set in advance. And
When the continuation time exceeds the reference time, an alarm is immediately issued from the controller 5 to notify that the component is clogged.

As described above, the electronic component detection device 1 of this embodiment not only can reliably detect a minute electronic component P, but also can detect the occurrence of component clogging based on the detection signal Sc. can do. Also,
In the case of this embodiment, since the one-shot multi 9 which is a general-purpose electronic component is used for the single-shot signal generating means, the cost of the apparatus can be reduced.

[Second Embodiment] Next, an electronic component detection apparatus according to another embodiment of the present invention will be described. FIG.
FIG. 9 is a diagram showing an electronic component selection system using an electronic component detection device according to another embodiment of the present invention.
In the electronic component detection device 11 of the present embodiment, the component sensor unit 8 and the one-shot multi 9 are directly connected to the controller 5, and the OR operation means includes:
As in the case of the first embodiment, the hardware (OR
Circuit), but as an OR operation process (software) previously incorporated in the control computer program of the controller 5. Since other configurations are the same as those of the first embodiment, only different portions will be described, and description of other portions will be omitted. In addition,
In FIG. 5, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals.

The controller 5 includes a microprocessor (CPU) 12 for arithmetic processing, a ROM 13 in which a control computer program and the like are written and stored,
A RAM 14 for temporarily storing various data and loading a control computer program is provided. Since the component sensor unit 8 and the one-shot multi 9 of the two electronic component detection devices 11 are connected to the controller 5, the sensing signal Sa and the single-shot signal Sb are
It is sent directly to the controller 5. If there is an input of the sensing signal Sa and the one-shot signal Sb, the microprocessor 1
2 executes the logical sum process set in the control computer program, and detects the sensing signal Sa and the single-shot signal S.
The OR signal of b is generated as the detection signal Sc. The operation after the detection signal Sc is obtained is the same as that of the first embodiment.

In this embodiment, the controller 5
Since the control computer program and the microprocessor 12, the ROM 13, the RAM 14, and the like are used as a part of the configuration, the hardware for the OR operation means is not required. In particular, in the case shown in FIG. 5, hardware for each logical sum operation means of a plurality of electronic component detection devices is not required, and the number of components can be reduced for each electronic component detection device.

Although the electronic component detection apparatus of each of the above embodiments detects electronic components entering and exiting the component inlet and the component outlet of the component selection device, the component detection position is determined by the component inlet or the component inlet. It may be a position other than the outlet. Also, in the second embodiment, an example has been described in which the electronic component detection device provided with the software configuration in the controller has two OR operation units. However, three or more OR operation units are provided. It is also possible to make individual pieces.

The present invention is not limited to the above-described embodiment in other respects. The present invention relates to the structure of a single-shot signal generating means, a controller, and the like, the use of a detection signal from an electronic component detection device, and the like. Various applications and modifications can be made within the scope of the gist.

[0032]

As described above, in the electronic component detection device of the present invention, a minute electronic component moves in a short time at a predetermined position on the component movement route, and only a sensing signal having a short time width can be obtained from the component sensor means. Even if there is no such signal, since a single-shot signal having a sufficient time width is finally output as a detection signal, even a minute electronic component can be reliably detected. In addition, when the component is clogged, the detection signal does not disappear and is continuously output, so that the component clogging can be reliably detected based on the detection signal.

In the case where the logical sum operation means of the electronic component detecting device is constituted by software as a logical sum operation process previously incorporated in a control computer program of a controller responding to the electronic component detection, Hardware for the sum calculation means is not required, and cost reduction and compactness can be achieved.

When each of the OR operation means of the plurality of electronic component detection devices is configured in software as an OR operation process executed inside the controller, the hardware for each OR operation means is provided. This eliminates the need for all hardware, and makes it possible to reduce the number of components in each electronic component detection device.

When a one-shot multivibrator (hereinafter abbreviated as "one-shot multi") is used as a single-shot signal generating means, the one-shot multi can be easily obtained in the market as a general-purpose electronic component. Since the device is a simple device, cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electronic component selection system using an electronic component detection device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the electronic component detection device according to the embodiment of the present invention, and is a graph showing a temporal change of each signal when there is no component clogging.

FIG. 3 is a partial block diagram showing a situation where a component clog has occurred in the system of FIG. 1;

FIG. 4 is a diagram for explaining the operation of the electronic component detection device according to the embodiment of the present invention, and is a graph showing a change over time of each signal when a component is clogged.

FIG. 5 is a block diagram showing an electronic component selection system using an electronic component detection device according to another embodiment of the present invention.

[Explanation of symbols]

1, 11 Electronic component detection device 2 Sorting device 3 Component inlet (predetermined position) 4 Component outlet (predetermined position) 5 Controller 6 Component introduction route (component moving route) 7 Component derivation route (component moving route) 8 Components Sensor section 9 One-shot multivibrator (single-shot signal generation means) 10 OR circuit (logical sum operation means) 12 Microprocessor (CPU) 13 ROM 14 RAMP Electronic component Sa Sensing signal Sb Single-shot signal Sc Detection signal Ta Time width of sensing signal Tb Time width of single-shot signal Tc Time width of detection signal

Claims (4)

[Claims] 1. An electronic component detection device which outputs a detection signal when an electronic component moving on a predetermined component movement route passes a predetermined position, while the electronic component is at a predetermined position on the component movement route. Is a component sensor means for outputting a sensing signal; a single signal generating means for outputting one single signal having a preset time width every time one sensing signal is received from the component sensor means; and the sensing signal and the single signal. And a logical sum operation means for outputting a logical sum signal of both signals as the detection signal as an input signal. 2. The method according to claim 1, wherein the component sensor means and the single-shot signal generation means comprise:
The logical OR operation means is directly connected to a controller that responds to the electronic component detection, and the OR operation means is configured as an OR operation process previously incorporated in a computer program for controlling the controller. Item 2. The electronic component detection device according to Item 1. 3. The controller is connected to component sensor means and single-shot signal generation means of a plurality of electronic component detection devices, and includes, as a logical sum operation means of each electronic component detection device, in a control computer program. 3. The electronic component detection device according to claim 2, wherein a logical sum operation process is incorporated in advance. 4. The electronic component detecting device according to claim 1, wherein the single-shot signal generating means is a one-shot multivibrator.