JPH0245144B2 - BINKENSASOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a bottle inspection device, and particularly to a device for detecting defects due to deformation of a glass bottle or the like while moving on a conveyor.

[Prior art]

Conventionally, various bottle inspection devices have been developed for detecting defects such as cracks, chips, and stains in bottles such as various glass bottles. However, in conventional bottle inspection devices, when the body of a bottle, which should originally have a circular external shape, is deformed into an oval shape, for example, the bottle inspection device is designed to detect defects caused by shape deformation. Therefore, when a bottle undergoes shape deformation, the defect cannot be easily and accurately inspected.

[Summary of the invention]

This invention was made with the aim of improving the above-mentioned drawbacks of the conventional products.It irradiates light onto the bottle mouth of a bottle that is being transported while rotating, and photoelectrically converts the specularly reflected light from the bottle mouth. By measuring the width of the bottle opening using the obtained output signal and detecting the rotational vibration signal of the bottle based on the measured width of the bottle opening, defects in bottle shape deformation can be easily and accurately detected. The present invention provides a bottle inspection device that can perform inspection.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a bottle inspection device according to an embodiment of the present invention. In the figure, 1 is a bottle such as a glass bottle, 2 is a strip-shaped light source, 3 is a photoelectric converter, 31 is a photoelectric conversion element that is provided in the photoelectric converter 3 and is a photodiode array having a self-scanning function, and 4 is a photoelectric conversion element. A binarization circuit, 5 a signal width counting circuit, 6 a bin rotation shake detection circuit, 7 a bin rotation drive belt, 8 a bottle transport conveyor, and 9 a conveyor side plate. The binarization circuit 4 and the signal width counting circuit 5 constitute a bottle mouth width measuring means 50, and the bottle rotation drive belt 7, the bottle conveyor conveyor 8, and the conveyor side plate 9 constitute a bottle conveying means 90. In FIG. 1, arrows 11 and 81 indicate the direction of rotation of the bottle and the direction of movement of the bottle, respectively.

FIGS. 2 to 4 are partial views of the main parts of the bottle inspection apparatus shown in FIG. 1, viewed from above, for explaining the operation mode. In each of the above figures, 1 is a bottle, 7 is a bottle rotation drive belt, 9 is a conveyor side plate, and 12 is an area where specularly reflected light from the bottle mouth irradiated with light from the light source 2 is directed upwards on the bottle transport conveyor 8. , 32 indicate the field of view of the photoelectric converter 3, respectively.

Next, the operation of the bottle inspection apparatus shown in FIG. 1, which is an embodiment of the present invention, will be explained with reference to FIGS. 2 to 4. The bottle 1, which has been conveyed to the inspection stage by the bottle conveyor 8, is now moved on the bottle conveyor 8 while being rotated in a bottle rotation direction 11 by the bottle rotation drive belt 7. At this time, the bottle mouth of the bottle 1 is illuminated by light from a band-shaped light source 2 installed above one side of the bottle transport conveyor 8. The light that is specularly reflected by the bottle opening of the bottle 1 and directed upward is transmitted to the photoelectric conversion element 31 in the photoelectric converter 3.
imaged on top. In this way, the field of view 32 of the photoelectric converter 3 is
is consistent with The output signal of the photoelectric converter 3 is binarized by a suitable setting value in a binarization circuit 4, and this binarized output signal is input to a signal width counting circuit 5. This signal width counting circuit 5 counts the width of the input signal for each scanning period of the photoelectric conversion element 31, and this counted value is received by the bin rotational shake detection circuit 6, and the received value is determined to be within an appropriate tolerance range. When the amount exceeds the limit, the bottle rotational shake detection circuit 6 outputs a deformed bottle detection signal.

Now, as shown in FIG. 2, when the shape of the body of the bottle 1 is circular, when a normal bottle 1 having this circular shape comes to the inspection stage, the bottle 1
The output signal of the signal width counting circuit 5 is stable because the state relationship shown in FIG. 2 is maintained during the 1/2 rotation of
If the shape of the body of bottle 1 is deformed into an oval shape, etc., while bottle 1 rotates 1/2 in the same way as above,
A state as shown in FIG. 3 or 4 appears, and the output signal of the signal width counting circuit 5 becomes large in the state shown in FIG. 4, and becomes small in the state shown in FIG. It will change significantly. Therefore, the variation in the output signal of the signal width counting circuit 5 is detected by the bin rotational shake detection circuit 6, and the modified bin detection signal is outputted from the bin rotational shake detection circuit 6.

In the above embodiment, a case has been described in which the judgment criterion of the bottle rotation shake detection circuit 6 is a known constant.
is determined to be a normal bin, calculate the average value of the output signal of the signal width counting circuit 5 of this bin 1,
It is also possible to add a judgment criterion optimization circuit that uses a weighted average of this average value and the above-mentioned judgment criterion as a new judgment criterion.

〔Effect of the invention〕

As explained above, this invention uses a bottle inspection device that irradiates light onto the bottle opening of a bottle being transported while rotating, and uses an output signal obtained by photoelectrically converting the specularly reflected light from the bottle opening to detect the bottle opening. The system is configured to measure the width of the bottle mouth and detect the rotational vibration signal of the bottle based on the measured width of the bottle opening, making it possible to inspect bottle shape deformation defects extremely easily and accurately. It has excellent effects.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing a bottle inspection device which is an embodiment of the present invention, and FIGS. 2 to 4 are views shown from above to explain the operation mode of the bottle inspection device shown in FIG. 1. It is a partial diagram of the main part. In the figure, 1... bottle, 2... light source, 3...
Photoelectric converter, 4... Binarization circuit, 5... Signal width counting circuit, 6... Bin rotation shake detection circuit, 7... Bin rotation drive belt, 8... Bin conveyor, 9
... Conveyor side plate, 11 ... Bin rotation direction, 12 ... Range, 31 ... Photoelectric conversion element, 3
2... Visual field, 50... Bottle opening width measuring means, 81...
. . . Bin running direction, 90 . . . Bin conveying means.
In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A bottle conveying means that rotates and conveys the bottle, a light source that irradiates light onto the bottle opening, a photoelectric converter that photoelectrically converts specularly reflected light from the bottle opening, and an output signal from the photoelectric converter that converts the bottle into A bottle characterized by comprising a bottle mouth width measuring means for measuring the width of the mouth, and a bottle rotational shake detection means for outputting a rotational shake signal of the bottle based on an output signal of the bottle mouth width measuring means. Inspection equipment.