JPH0415502A - Image input device for carried parts in vibration parts carrying machine - Google Patents

Abstract

PURPOSE:To make the space factor satisfactory and to reduce the device cost by flashing a flash source by synchronizing with a driving signal to a vibration driving source, and obtaining an image of parts on a carrying line at the time of flashing. CONSTITUTION:From a feeder driving circuit 36, a driving signal is supplied to a coil 25, and by a frequency of this driving signal, a bowl 21 executes torsional vibration. As a result, parts (m) in the bowl 21 are transferred along a track 22. When the parts (m) reach the front of a lens part 30a of a camera 30, its shadow is photographed by the camera 30 by a flash from an electronic flash 33. The timing of its flash synchronizes with a synchronizing signal from the circuit 36. Also, in an image input controller 35, an image pickup signal of the camera 30 is supplied to a computer 37 at a suitable timing, this image pickup and a desired attitude stored in advance are compared, and when they coincide with each other, the parts (m) are supplied to the next process, but when they do not coincide, a compressed air blowout device 34 is driven and the parts (m) are blown away to the inner part of the bowl 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image input device for conveyed parts in a vibrating parts conveyor.

[Conventional technology and its problems]

For example, a vibrating parts feeder has a spiral track for transporting parts, and torsional vibration is applied to this track to transport parts.

There are cases where it is desired to determine the attitude of the transported component. Conventionally, devices such as those shown in FIGS. 6 and 7 have been used for this purpose. That is, in FIGS. 6 and 7, the vibrating parts feeder is shown as (1) as a whole, and a spiral track (9) for conveying parts is formed on the inner circumferential wall of the bowl (2) as is well known. ing. A movable core (3) is integrally fixed to the bottom wall of the bowl (2), and is supported by leaf springs (4) inclined at equal angular intervals with the lower base protrusion (5). combined. An electromagnet (7) having a coil (6) wound thereon is fixed on the base block (5). The vibrating parts feeder (1) is constructed as shown below, and its entirety is supported on the floor by a vibration isolating rubber (8). When the coil (6) is energized with an alternating current, the bowl (2) undergoes a torsional vibration in a known manner, whereby the part m on the track (9) is transported along the track (9) by the vibration. The parts are discharged along a straight track (10) formed at the discharge end of the track (9), and a belt conveyor (1) is disposed with a slight gap between the tracks. The camera (12) and light source (13) installed on both sides are transported in the direction indicated by the arrow.
), the shadow of the part m is captured as an image, and this is compared with the posture stored in the computer connected to this camera (12). Based on this comparison, for example, if If the posture is not a predetermined one, it is rejected as a defective product in the next process (not shown).

Zunawaji According to the conventional device, the vibrating bar feeder (1,)
I would like to obtain an image of the posture of a part m that is being transported by vibrations on the transport path (9) in Figure 6, but since the image is blurred by the vibrations, I tried to obtain a clear image.
As shown in Fig. 7, a belt conveyor (11) is specially provided, and a camera (12) and a light source (13) are installed on the side of the belt conveyor (11).
) to obtain an image showing the orientation of the part m to be supplied to the next process. However, in such an image input device, a belt conveyor (11) is specially installed, and a space is required to install such a belt conveyor between the next process where parts in a predetermined posture are supplied. Therefore, it was disadvantageous both in terms of space factor and cost.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an image input device for conveyed parts in a vibrating parts conveying machine, which can improve the space factor and reduce the device cost 1-.

[Means to Solve the Problem] The purpose of Part 1-H is to provide a vibrating parts conveyor that conveys parts by vibrating a conveying path by the driving force of a vibration drive source, in which an image is taken for the conveying path. The device is fixed, a flash source is disposed opposite to the imaging device, and the flash source is caused to flash in synchronization with a drive signal to the vibration drive source to obtain an image of the component on the conveyance path at the time of the flash. This is achieved by an image input device for a conveyed component in a vibrating component conveyor, characterized in that the image is obtained from the imaging device.

Alternatively, in a vibrating parts conveyor that transports parts by vibrating the transport path using the driving force of a vibration drive source,
An imaging device is fixed to the conveyance path, a flash light source is disposed opposite to the image pickup device, and vibration detection means for detecting vibrations of the conveyance path is provided. Achieved by an image input device for conveyed parts in a vibrating parts conveyor, characterized in that a flash is made in synchronization with a detection output signal, and an image of the component on the conveyance path at the time of the flash is obtained from the imaging device. Ru.

[For production]

The vibrating parts conveyor vibrates due to the driving force of the vibration drive source, and a flash source is flashed in synchronization with the drive signal of this vibration drive source or in synchronization with the vibration of the conveyance path to obtain an image with an imaging device. Therefore, if an image is obtained, for example, when the transport path and the part are in contact with each other, it is possible to obtain an image of the part in a completely relatively stationary state, that is, in a state without shaking. Therefore, for example, it is possible to reliably know the posture of parts during vibration transport in a vibrating parts feeder, and therefore, the subsequent processing can be performed reliably. Since it is not necessary to arrange other devices, the space factor is also improved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An image input device for conveying parts in a vibrating parts conveying machine according to an embodiment of the present invention will be described below with reference to the drawings.

The vibrating parts feeder of this embodiment is also constructed in the same manner as the conventional vibrating parts feeder, but the movable core (22), which is indicated as (20) as a whole and is fixed to the bottom wall of the bowl (21), is It is connected to the lower base block (24) by plate springs (23) arranged at an angle at equal angular intervals, and an electromagnet (26) having a coil (25) wound thereon is fixed on the base block (24). There is. The vibrating parts feeder (20) is constructed as described above, and its entirety is supported on the floor by a vibration isolating rubber (27).

In this embodiment as well, a spiral track (22) is formed in the bowl (21), but a round hole is formed in a part of the side wall, and a CCD camera (30) according to the present invention is attached to this hole as a mounting member. (31) is fixed to the bowl (21). The lens portion (30a) of the camera (30) is fitted into a round hole in the side wall portion of the bowl (21). That is, as shown in FIG. 2, the lens section (30a) is arranged so that the entire image of the component m being conveyed on the track (22) can be captured by the lens section (30a). A strobe (flash light source) (33) is arranged opposite to the camera section (30al).CCD
The output terminal of the camera (30) is the image input control device (35)
connected to. The negative output terminal of the feeder drive circuit (36) supplies a drive signal to the coil (25) in the vibrating parts feeder (20). The other output terminal supplies a synchronizing signal to the strobe drive circuit (38),
A strobe (33) is configured to emit light in synchronization with this. The image input device (35) supplies the image signal of the camera (30) to the computer (37). A predetermined posture of the desired part is stored in the computer (37), and this is compared with the output from the image input control device (35). If the outputs do not match, the air blowing device (3)
4) is supplied with a drive signal. In other words, if they do not match, the device (34) is activated to eject compressed air from the nozzle port (34a) as shown in the figure, and blow the part m into the bowl (21).

The embodiment of the present invention is constructed as described above, and its operation will be explained next.

A drive signal is sent from the feeder drive circuit (36) to the coil (25).
), which causes the bowl (21) to torsionally vibrate at the frequency of this drive signal. Thereby, the part m in the bowl (21) is transported along the track (22) by vibration in the direction indicated by the arrow. When part m reaches the front of the lens part (30a) of the camera (30), the flash from the strobe (33) casts its shadow onto the camera (30).
), and the timing of the flash is synchronized with the synchronization signal from the feeder drive circuit (36). In the image input control device (35), the image signal of the camera (30) is supplied to the computer (37) at an appropriate timing, this image is compared with a desired posture stored in advance, and when the images match, air is ejected. Since no drive signal is supplied to the device (34), component m is the compressed air blowing device (
34) and is supplied to the next process, but if they do not match, this compressed air blowing device (34) is driven and compressed air is jetted from the nozzle (34a) to blow the part m. Blow it into the bowl (21).

As described above, the strobe (33) flashes in synchronization with the drive signal of the feeder drive circuit (36), and the image signal from the camera (30) at this time is supplied to the computer (37), so the strobe drive circuit If it is possible to adjust the phase between the output of (38) and the synchronization signal of the feeder drive circuit (36), and the image at this time is monitored on the computer (37), it is possible to It is possible to obtain an image of the part m during vibration transport in a state where the part m is in contact with the transport surface of the track (21).If the image is taken while the part m is moving with this track while being pressed against the transport surface of the track (21), This image can be obtained more clearly.Also, since there is no need to provide a separate belt conveyor or chute since conventional methods only take images that are blurred due to vibration, this is extremely preferable in terms of the space factor for posture determination. It is.

FIG. 3 shows an image input device for conveyed parts in a vibrating parts conveyor according to a second embodiment of the present invention, and parts corresponding to those in the first embodiment are denoted by the same reference numerals, and a detailed explanation thereof will be given below. is omitted.

In this embodiment, a synchronizing signal is obtained from the image input control device (35) to the strobe drive circuit (38), and this signal is also supplied to the feeder drive circuit (36).

In the feeder drive circuit (36), this is amplified to obtain a current to be applied to the coil (25) of the vibrating parts feeder (20). The COD camera (3q) is designed to release the shutter at a predetermined timing, but the image input control device (35) is configured to release the shutter at a predetermined timing.
Only the imaging signal synchronized with the synchronization signal of 8) is supplied to the computer (37). In this example as well, the strobe (33) is the bowl (
Since the light is emitted in synchronization with the vibration of 21), clear imaging can be obtained, and it is clear that the same effect as described above can be obtained. Other functions are the same as those in the first embodiment, so their explanation will be omitted.

FIG. 4 shows an image input device for conveyed parts in a vibrating parts conveyor according to a third embodiment of the present invention, and parts corresponding to those in the first embodiment are denoted by the same reference numerals, and a detailed explanation thereof will be given below. is omitted.

This embodiment is a so-called high-frequency drive vibrating parts feeder, which is indicated as a whole by (40), and whose bowl (4
1) A spiral track is formed in the interior as in the first embodiment, and a movable core (42) is fixed to the bottom wall, and a base plate (43) below this and a leaf spring (4
4), but the resonant frequency in this case is much higher than the resonant frequency of the first embodiment (also, the electromagnet (46) is wound around the electromagnet (46) fixed on the base block (43). A high frequency current is applied to the coil (45), for example, 2
40Hz is applied.

In other words, this high-frequency drive signal is supplied from the feeder drive circuit (50), and this high-frequency drive signal is supplied by a high-frequency oscillator (
51) is connected, and this output is sent to the drive circuit (50
), the current flowing through the coil (45) is amplified and the waveform is shaped so that the current is large enough to drive the bowl (41). The output of the high frequency oscillator (51) is further supplied to a strobe drive circuit. It is clear that this embodiment also provides the same functions and effects as the first embodiment, so the explanation thereof will be omitted.

FIG. 5 shows an image input device for conveyed parts in a vibrating parts conveying machine according to a fourth embodiment of the present invention, but unlike the above embodiments, this embodiment is a vibrating parts feeder using a vibrating mower as a driving source. (60) is applied. A spiral track is formed in this bowl (61) as in the above embodiment, but a vibration motor mounting plate (62) is fixed to the bottom wall of the bowl (61) and hangs vertically. However, a pair of vibration electric motors (65A) and (65B) are fixed to both sides of the motor so as to be tilted in opposite directions, as shown by a solid line and a dashed line. Also, bowl (61)
is connected to the base block (63) by leaf springs (64) arranged at equal angular intervals, but unlike the electromagnet-driven type of the above embodiment, there is no plate on the base block (63). No electromagnetic drive is provided. Instead, vibrating electric motors (65A) (65B) are fixed to the bowl (61) side as driving sources. Vibration electric motor (6
5A) and (65B) have the same configuration, so only one vibration electric motor f65A) will be explained.As is well known, a rotating shaft (66) is supported in the casing, or an S half is attached to both ends of the rotating shaft (66). Circular unbalanced way h
(67a) (67bl is fixed, and it consists of an induction motor, or when a commercial power supply is connected to it, the unbalanced weight (67a) (67b) is connected to the rotating shaft (66).
The other vibration electric motor (65
A torsional vibration force similar to that of the above embodiment is generated by the synchronizing action of B) and a known synchronizing force.

This causes the bowl (61) to vibrate torsionally. In this embodiment, a vibrometer (68) made of, for example, a piezoelectric element is fixed to the peripheral wall of the bowl (61), and its output is transmitted to the vibration detection circuit (68). 69). Then, this detection signal is supplied to the strobe drive circuit (22) instead of the synchronization signal from the vibration drive section of the above embodiment.

In this example, a vibration motor (
65A) (65B) slips with respect to the commercial power supply depending on the load, so it changes depending on the number of poles. For example, if the no-slip rotation speed is 1500 RPM, it is usually 1450 to 1460 RPIi! Rotate with. This rotational speed varies depending on the load, but in such a case, the commercial power source is the driving source, but synchronization with this is different from synchronization due to vibration. Therefore, in this embodiment, the vibration of the actual bowl (61) is detected by the vibration meter (68), and the strobe is flashed in synchronization with this. It is clear that the same effects as in the above embodiment can also be obtained by this method.

Although each embodiment of the present invention has been described above, the present invention is of course not limited to these, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the computer (37) compares the posture with a predetermined posture, and the parts that do not have the predetermined posture are blown away into the bowl on the downstream side of the camera (30). A component sorting means, for example a direction reversing means, may be provided to reverse the front and rear directions. Alternatively, the parts discharged from the parts feeder may be guided to various processes depending on the respective predetermined postures without using any such parts feeding means.

Furthermore, in the above embodiments, a vibrating parts feeder has been explained as a vibrating parts conveying machine, but the present invention is not limited to this, and the present invention is not limited to this. The present invention is also applicable to machines.

Furthermore, in the above embodiments, an electromagnetic drive unit and a pair of vibration electric motors were explained as the vibration drive source, but the present invention is also applicable to a vibrating component conveyor having other vibration drive units.

Further, in the first and second embodiments, an electromagnet drive unit is used, and the strobe is flashed in synchronization with a drive signal for the electromagnet drive unit, a high frequency drive source, or an output of a high frequency voltage generation source to obtain an imaging signal. However, instead of this, a vibration detector made of, for example, a piezoelectric element may be attached to the bowl (2) in the same way as in the third embodiment, and in synchronization with the detection signal of this vibration detector, the lights may be made to flash. good.

Further, in this case, instead of being attached to the peripheral wall surface of the bowl, it may be attached to a part of the base block (6) or the leaf spring (7). In addition, if a vibration detector is attached to the base block (6), what is the bowl (2)? 18
Since the vibrations are performed with different 0° phases, it is necessary to take this into consideration. However, it is clear that a strobe drive signal synchronized with the track can be obtained in any case.

〔Effect of the invention〕

As described above, according to the image input device for a conveyed component in a vibrating component conveying machine according to the present invention, it is possible to reliably capture an image of the posture of the component during vibration conveyance without any blurring.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an image input device shown together with a partially cutaway side view of a vibrating parts conveyor according to a first embodiment of the present invention, FIG. 2 is a plan view of the same, and FIGS. A block diagram of an image input device shown together with a side view of a vibrating component conveying machine according to an example and a third embodiment, FIG. 5 is a partially cutaway side view of a vibrating component conveying machine according to a third embodiment of the present invention, and FIG. 6 is a conventional A side view of the image input device in the example vibrating parts conveyor and FIG. 7 are the same plan views. In the figure, 201 (401 [60)... 30 33 36) (5Q)... 38 ・・・・・・・・・・・・・・・ 51 ・・・・・・・・・・・・ 68 ・・・・・・・・・・・・ Substitute vibration parts feeder CCD Camera Strobo Feeder drive circuit Strobe Drive circuit high frequency oscillator vibration Yasuo Hantohan

Claims (2)

[Claims] (1) Vibrate the conveyance path using the driving force of the vibration drive source,
In a vibrating parts conveying machine configured to convey parts, an imaging device is fixed to the conveyance path, a flashing light source is disposed opposite to the imaging device, and the flashing light source is connected to a drive signal to the vibration driving source. 1. An image input device for conveyed parts in a vibrating parts conveying machine, characterized in that an image of the parts on the conveyance path at the time of the flash is obtained from the imaging device by flashing light in synchronization with . (2) Vibrate the conveyance path using the driving force of the vibration drive source,
In a vibrating parts conveyor configured to convey parts, an imaging device is fixed to the conveyance path, a flash light source is disposed opposite to the image pickup device, and vibration detection means detects vibrations of the conveyance path. vibrating parts transportation, characterized in that the flashing light source is provided with flash light in synchronization with the detection output signal of the vibration detection means, and an image of the component on the transport path at the time of the flashing is obtained from the imaging device. An image input device for conveyed parts in a machine.