JPH0415504A - Image input device for carried parts in vibration parts carrying machine - Google Patents

Abstract

PURPOSE:To make the space factor satisfactory, and also, to reduce the device cost by obtaining an image of parts on a carrying line by an image pickup device by synchronizing with a driving signal to a vibration driving source. 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. Also, in an image input controller 35, AND is taken, that is, an image pickup signal of the camera 30 and a synchronizing signal of the circuit 36 are supplied as image pickup signals to a computer 37, when AND, that is an AND circuit comes to '1' when the image pickup signal of the camera 30 is continued. 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.

[Prior Art 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 this is connected to the lower base block (5) by leaf springs (4) inclinedly arranged at equal angular intervals. ing. Base block (5
) on which an electromagnet (7) having a coil (6) wound thereon is fixed. The vibrating parts feeder C1) is constructed as described above, and its entirety is supported on the floor by a vibration isolating rubber (8). When an alternating current is applied to the coil (6), the bowl (2) undergoes torsional vibration as is well known, and this causes the part m on the track (9) to vibrate, causing the part m on the track (9) to vibrate.
). This is discharged along a straight track (10) formed at the discharge end of the track (9), and a belt conveyor (11)
The part m is transported in the direction shown by the arrow, and the shadow of the part m is captured as an image by the camera (12) and light source (13) installed on both sides. This is compared with the posture stored in the computer connected to this camera (12). For example, based on this comparison, if the posture is not a predetermined posture (not shown), then the next posture (not shown) is determined. We try to eliminate them as defective products during the process.

In other words, according to the conventional device, it is desired to obtain the posture of the component [n] being transferred by vibration on the conveyance path (9) in the vibrating bar feeder (1) in both images, but the image is blurred due to the vibration. In order to obtain clear images, a special belt conveyor (11) is installed as shown in Figures 6 and 7, and a camera (12) and a light source (1
3), an image showing the orientation of the part m to be supplied to the next process is obtained. However, in such an image input device, a belt conveyor (11) is specially arranged, and a space is required to arrange such a heald conveyor between the next process and the part to which parts in a predetermined posture are supplied. Therefore, it was disadvantageous from both a space factor and a cost standpoint.

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems, and provides an image input device for conveyed parts in a vibrating parts conveyor, which can improve the space factor and reduce the device cost. The purpose is to

[Means for Solving the Problems] The above object is to provide a vibrating parts conveyor in which a conveyance path is vibrated by the driving force of a vibration drive source to convey parts, and an imaging device is attached to the conveyance path. This is achieved by an image input device for a conveyed component in a vibrating component conveying machine, characterized in that the image capturing device obtains an image of the component on the conveying path in synchronization with a drive signal to the vibration drive source. Ru.

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, and a vibration detection means for detecting vibrations of the conveyance path is provided, and an image of the component on the conveyance path by the image pickup device is obtained in synchronization with a detection output signal of the vibration detection means. This is achieved by an image input device for conveyed parts in a vibrating parts conveyor, which is characterized by the following.

[For production]

The vibrating parts conveyor vibrates due to the driving force of the vibration drive source, and it vibrates in synchronization with the drive signal of this vibration drive source.
;: is designed to obtain an image by the imaging device in synchronization with the vibration of the transport path, so if the image is obtained when the transport path is in contact with a component, for example, it will be completely relatively static. 1. It is possible to obtain an image of the part in a fixed 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 there is no need to install other equipment, space efficiency is also improved.

[Example] Hereinafter, an image input device for conveyed parts in a vibrating parts conveyor according to an example of the present invention will be described 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 equal angular intervals, and an electromagnet (26) having a coil (25) wound thereon is fixed to 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 inside the bowl (21), but a round hole is formed in a part of the side wall, into which a CCD camera (3o) according to the present invention is attached as an attachment member. (31) is fixed to the bowl (21).

The lens part (30a) of the camera (30) is the bowl (21)
It fits into a round hole in the side wall. 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 light source (33) is arranged facing the camera section (30a). CCD camera (30)
An output terminal of is connected to an image input control device (35), and one output terminal of a feeder drive circuit (36) is connected to this. Moreover, this other output terminal supplies a drive signal to the coil (25) in the vibrating parts feeder (2o). Furthermore, an image input control device (35)
is the image signal of the camera (30) and the feeder drive circuit (36).
) and the synchronization signal supplied from 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 (
34) is supplied with a drive signal. In other words, if this is not the case, the device (34) is actuated 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 the part m reaches the front of the lens part (30a) of the camera (3o), its shadow is imaged by the camera (30) due to the light from the light source (33), and the timing of the shutter is shown in Fig. 4. This is done at the timing shown in (A). That is, a, a2as, a40. The synchronization signal from the feeder drive circuit (36) is bl, b2, b3, etc. as shown in Fig. 4 fBl.
... occurs.

In the image input control device (35), a logical AND is performed, that is, the image signals a+, az, a3, a4 of the camera (30)
. . . and synchronization signals b1, b2, b3, . . . of the feeder drive circuit (36) are al, b+, a4
If the imaging signal of the camera (30) is logically ANDed during the duration, that is, the AND circuit becomes "■" as shown in b3, the image signal is supplied to the computer (37) as an imaging signal, and this imaging signal is combined with the desired posture stored in advance. are compared, and if they match, no drive signal is supplied to the air blowing device (34), so part m passes through the side of the compressed air blowing device (34) and is supplied to the next process. If it doesn't match,
This compressed air blowing device (34) is driven, and the nozzle (3
Compressed air is blown out from 4al and parts m are placed in the bowl (21
) inward.

As described above, the imaging signal from the camera (30) is supplied to the computer (37) in synchronization with the synchronization signal of the feeder drive circuit (36).
0) imaging signals al, a2. a3, aa...
and feeder drive circuit (36) synchronization signals b1, b2, b
3. The phase τ between the image input control device (3
5), and the image at this time is monitored by the computer (37), it is possible to obtain the clearest image of the part m during vibration conveyance. Truck (21
This image can be obtained more clearly if the image is taken while the part m is moving with this track in a state where it is in pressure contact with the transfer surface of the track. Further, since it is not necessary to provide a separate belt conveyor or chute unlike the conventional method, which only takes blurred images due to vibration, this is extremely preferable in terms of the space factor for posture determination.

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.

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 same way as in the first embodiment, and a movable core (42) is fixed to the bottom wall, and a base block (43) and a leaf spring (44) are fixed to the bottom wall.
), but the resonant frequency in this case is much higher than that of the first embodiment (and the coil wound around the electromagnet (46) fixed on the base block (43) (45) has a high frequency current, for example 24
0Hz is energized.

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).
Inside, the current flowing through the coil (45) is amplified and its waveform is shaped so that it has enough power to drive the bowl (41). The output of the high frequency oscillator (51) is further connected to a frequency divider (52), so that the frequency-divided output is supplied to the image human control device (53). That is, according to this embodiment, the feeder drive signal is much higher than that in the first embodiment, so the frequency must be lowered so that the imaging signal to the image input control device (35) can compete with this. I'm trying to synchronize it with the server. Since it is clear that the present embodiment achieves the same functions and effects as the first embodiment, the explanation thereof will be omitted.

FIG. 5 shows an image of a human-powered device for conveying parts in a vibrating parts conveying machine according to a third embodiment of the present invention, but unlike the above embodiments, this embodiment uses a vibrating parts feeder ( 60) Kata is applied. Inside this bowl (61), there is also a spiral tiger-like structure similar to the above embodiment.
A vibrating motor window plate (62) is fixed to the bottom wall and hangs down in the vertical direction. As shown in FIG. (64), but unlike the electromagnet drive type in the above embodiment, there is no electromagnet drive section provided on the base plate (63). Electric motors (65A) (65B) are fixed to the bowl (61) side as driving sources.
65Δ) (65B) have the same configuration, so only one vibration electric motor (65A) will be explained.As is well known, a rotating shaft (66) is supported in the casing, but there are N semicircular unbalanced weights (67a) (67b) are fixed, and these are made up of an induction motor, but when a commercial power source is connected to this, the unbalanced weights (67a) (67b) are connected to the rotating shaft (66).
The other vibrating electric motor f65 rotates together with it and forms a pair with it.
A torsional vibration force similar to that of the above embodiment is generated under the synchronization effect of B+ and a known synchronization force.

This causes the bowl (61) to torsionally vibrate. 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 ( 69). Then, this detection signal is supplied to the image input device (35) instead of the synchronization signal from the vibration drive section of the above embodiment. This includes a CCD camera (3
0) is connected.

In this example, a vibration motor (
65Δ) (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 usually rotates at 1450 to 1460 RPM. 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 CCD camera (30) is caused to take an image 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 parts that do not have the predetermined posture are blown away into the bowl on the downstream side of the camera (30) after comparing them with the predetermined posture in the combination coater (37). 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 according to their respective predetermined postures without using any such parts feeding means.

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

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 image input control device ( 35) to obtain an imaging signal, but instead of this, the bowl (21) (
41), a vibration detector made of, for example, a piezoelectric element is attached as in the third embodiment, and in synchronization with the detection signal of the vibration detector, a synchronized imaging signal of the camera (30) is obtained from the image control device (35). You can.

In this case, instead of attaching it to the peripheral wall of the bowl, the base block (24) (43) or leaf spring (23) can be used.
It may be attached to a part of (44). If a vibration detector is attached to the base block (241 (43)), it will vibrate at a phase 180° different from that of the bowl, so this must be taken into consideration.However, in any case, It is clear that synchronized signals can be obtained using

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

[Brief explanation of drawings]

FIG. 1 is a block diagram of a human-powered device shown together with a partially cutaway side view of a vibrating component conveyor according to a first embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a vibrating component according to a second embodiment of the present invention. A block diagram of the image input device shown together with a side view of the conveyor;
FIG. 4 is a time chart for explaining the operation of the first embodiment of the present invention, FIG. 5 is a partially cutaway side view of the vibrating parts conveyor according to the third embodiment of the present invention, and FIG. 6 is a diagram of the conventional example. A side view of the image input device in the vibrating parts conveyor and FIG. 7 are the same plan views. In the figure, 20) (40) (60) 30 35 36 (50)・・・ 51 ・・・・・・・・・・・・ 68 ・・・－・・・・・・・・・ 69 ・－・・・・・・・・・ Vibration parts feeder CCD camera Image input control device Feeder drive Circuit high frequency oscillator vibration meter vibration detection circuit

Claims (2)

[Claims] (1) 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 transport path, and an image of the component on the transport path is obtained by the imaging device in synchronization with a drive signal to the vibration drive source. An image input device for conveyed parts in a vibrating parts conveyor, characterized in that: (2) Vibrate the conveyance path using the driving force of the vibration drive source,
In a vibrating parts transport machine configured to transport parts, an imaging device is fixed to the transport path, and vibration detection means for detecting vibrations of the transport path is provided, and images of the parts on the transport path by the imaging device are provided. An image input device for conveyed parts in a vibrating parts conveyor, characterized in that the image input device is configured to obtain an image in synchronization with a detection output signal of the vibration detection means.