JP2003004649A - Apparatus for inspecting glass container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for inspecting glass containers which can reduce the number of emitters/receivers. SOLUTION: There are provided an illumination means 5 for illuminating the glass container 1 with light, and a detecting means 7 for detecting fluorescence generated by the light to the glass container. Defects of the glass container are detected by a distribution change of a quantity of light of the fluorescence detected by the detecting means 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass container inspection device for detecting defects such as chattering, bubbles and foreign substances in a glass container.

[0002]

2. Description of the Related Art Conventionally, as an optical inspection device, a glass container is irradiated with light from a light projector, and the reflected light is received by utilizing the fact that the light is reflected by the broken surface of the glass, and inspects for defects. There have been proposed a device for detecting a defect and a device for inspecting a defect by detecting a decrease in the amount of transmitted light which is reduced by the reflection on the broken surface of the rib.

[0003]

In an apparatus for inspecting defects by receiving the reflected light of the chatter, the direction of the reflected light changes variously depending on the direction of the broken surface of the chatter. Even if such a phenomenon occurs, in order to accurately inspect it, a device that detects reflected light emitted in a wide solid angle without omission is required.

In this case, there is a problem in that a photoreceiver having a large diameter is used or a large number of photoreceivers are required, which increases the cost of the apparatus.

If the depth of focus of the light receiving lens is shallow,
When the reflected light is received obliquely from the glass container, the inspection area becomes narrow. Therefore, when inspecting the chatter that occurs in a large number of parts, an even larger number of light emitters / receivers are required.

[0006] In a handling machine or the like, the mounting space for the light emitters / receivers is limited, so that a sufficient number of light emitters / receivers cannot be mounted. Even if a sufficient number of light emitters / receivers can be mounted, It takes time to adjust these light projecting and receiving devices, and there is a problem that productivity of the glass container is reduced.

Therefore, an object of the present invention is to provide a glass container inspection device which can solve the problems of the above-mentioned conventional techniques and reduce the number of light emitting and receiving devices.

[0008]

The invention according to claim 1 is
An irradiation unit that irradiates the glass container with light, and a detection unit that detects the fluorescence generated in the glass container by the light,
It is characterized in that the defect of the glass container is detected by the change in the distribution of the amount of fluorescence detected by the detecting means.

The invention according to claim 2 further comprises an irradiation means for irradiating the glass container with light, and a detection means for detecting the fluorescence generated in the glass container by the light. It is characterized in that the defect of the glass container is detected by the change of the optical path.

In these inventions, since the defect is detected by the change of the distribution of the light quantity of the fluorescence or the change of the optical path, even if the fracture surface of the chatter is directly sideways or oblique, it can be detected by one light emitter / receiver. can do.

[0011]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a glass container (bottle). The glass container 1 is placed on a turntable 3, and the lower part of the glass container 1 is suction-adsorbed on the turntable 3 so as to be rotatable in the circumferential direction of the body of the glass container 1. The rotary table 3 may be configured to be lifted and lowered by a lift mechanism (not shown).

The glass container inspection device according to the present embodiment is
It comprises a light projector (irradiation device) 5 located right above the mouth of the glass container 1 and a light receiver (detection means) 7 located right next to the mouth of the glass container 1.

As shown in FIG. 2a, the light receiver 7 includes an incident light cut filter 7a and a CCD camera 7b. The camera 7b emits light 5a emitted from the light projector 5 to the glass container 1 (see FIG. 1). ), The fluorescence 10 generated in the glass container 1 is photographed. An image processing device (not shown) is connected to the camera 7b.

In the first embodiment, the defect of the glass container 1 is detected by the change in the light amount distribution of the fluorescence 10 detected by the camera 7b.

In FIG. 2a, the glass container 1 has defects (chatter).
Is not present, and in this case, the light intensity distribution of the fluorescent light 10 is as shown in FIG.
As shown in, the brightness gradually decreases in the height direction of the glass container 1 as viewed from the incident direction of the light 5a.

Assuming that the above-mentioned defect is a chatter 11 having a fracture surface that runs almost directly as shown in FIG. 3a, the fluorescence 10 generated in the glass container 1 by the light 5a emitted from the projector 5 to the glass container 1 is The amount of light gradually decreases with distance until reaching the chatter 11, but no extreme change appears in the amount of light.

On the other hand, when reaching the chatter 11, as shown in FIG. 3B, the light amount distribution changes greatly at the inflection point 21 corresponding to the chatter 11. That is, an extreme change appears in the light amount distribution of the fluorescence 10 before and after the chatter 11 as a boundary.

In this embodiment, when the fluorescence 10 is photographed and image-processed by the above-mentioned camera 7b and an extreme change appears in the light amount distribution, the chatter 11 is observed at the inflection point 21 and the glass 11 is recognized. It is detected as a defect of the container 1.

In FIG. 4a, the fracture surface of the chatter 12 is obliquely generated on the glass container 1, and even in this case, the fracture surface of FIG.
As shown in FIG. 3, an extreme change appears in the light amount distribution with the chatter 12 as the nodal point 22, and the chatter 12 is recognized at the nodal point 22 and is detected as a defect occurring in the glass container 1.

In the present embodiment, defects such as chattering of the glass container 1 are detected by the change in the light amount distribution of the fluorescent light 10. Therefore, even if the fracture surface of the chatter is directly sideways or obliquely, these defects are also present. Can be detected by the single light emitter 5 and the single light receiver 7, so that the number of light emitters and light receivers can be reduced.

Therefore, there is provided a glass container inspection device suitable for a handling machine and the like, which is limited in the mounting space of the light emitter / receiver.

Further, since the number of light emitters / receivers is reduced, the time required for adjusting the light emitters / receivers can be shortened and the productivity of the glass container can be improved.

In the second embodiment, as shown in FIG.
The defect (chatter 13) of the glass container 1 is detected by the change of the optical path of the fluorescent light 10.

When the light 5a from the projector 5 is obliquely applied to the outer peripheral portion of the glass container 1, the fluorescence 10 generated in the glass container 1 by this light is substantially linear, assuming that there is no chatter 13. Should appear in.

On the other hand, when the fins 13 are present, the light 5a is reflected by the fracture surface of the fins 13 and a part 10 of the fluorescence 10 is emitted.
a changes its optical path, and as shown,
It appears as letter-shaped fluorescent light 10, 10a.

In this embodiment, the substantially L-shaped fluorescent light 10, 1 is used.
After 0a is photographed by an optical receiver (not shown) and image-processed, a chatter 13 is observed at a branch point where a change in the optical path appears, which is detected as a defect of the glass container 1.

As shown in FIG. 1, the glass container 1 is configured to be rotatable in the circumferential direction of the body portion. Therefore, when the above-mentioned light emitter / receiver is fixed, the left and right sides of the chatter 13 are processed in the same procedure as above. The chatters 14 and 15 existing in the vehicle are detected.

FIG. 6 shows a cross section of the glass container 1. In this case, the light projector 5 is installed almost right beside the glass container 1, and the light 5 a from the light projector 5 is emitted toward the glass container 1 to generate fluorescence 10 in the glass container 1. If the glass container 1 has chatters 16 and 17, one chatter 1
The fracture surface of 6 is oblique, and in this case, the part 10a changes the optical path in the direction opposite to the direction in which the fluorescence 10 extends,
The fracture surface of the other chatter 17 extends almost directly to the side, and in this case, a part 1 thereof is in the direction opposite to the direction in which the fluorescence 10 extends.
0a changes the optical path.

In this embodiment, defects such as chattering of the glass container 1 are detected by the change of the optical path of the fluorescent light 10.
Even if the direction of the fracture surface of the chatter is straight or oblique, these defects can be detected by the single light emitter 5 and the single light receiver 7. Therefore, the number of light emitters / receivers can be reduced. You can

Although the present invention has been described based on the embodiment, it is obvious that the present invention is not limited to this.

In the above embodiment, the device for detecting the defect of the glass container with one light emitting and receiving device is described, but the present invention is not limited to this, and a plurality of light emitting and receiving devices are installed at different angles, If a defect is detected by using, it becomes possible to detect a chatter having fracture surfaces in more directions. It should be noted that this inspection apparatus is capable of detecting defects such as bubbles and foreign substances as well as chatter.

[0033]

According to the present invention, a defect is detected by a change in the distribution of the amount of fluorescent light or a change in the optical path. Therefore, even if the fracture surface of the chatter is a sideways or oblique direction, a single projector / receiver can be used. It can be detected and its number can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2A and FIG. 2B are views for explaining changes in the distribution of fluorescence light amount.

FIG. 3A and FIG. 3B are views for explaining changes in the distribution of fluorescence light amount.

FIG. 4A and FIG. 4B are views for explaining changes in the distribution of fluorescence light amount.

FIG. 5 is a diagram for explaining changes in the optical path of fluorescence.

FIG. 6 is a diagram for explaining changes in the optical path of fluorescence.

[Explanation of symbols]

1 glass container 3 turntable 5 Projector (irradiation device) 7 Light receiver (detection means) 7a Incident light cut filter 7b camera 10 fluorescence 11 to 17

Claims (2)

[Claims] 1. An irradiation means for irradiating a glass container with light,
A glass container inspecting apparatus, comprising: a detecting unit that detects fluorescence generated in a glass container by the light; and a defect of the glass container is detected by a change in a light amount distribution of the fluorescence detected by the detecting unit. 2. An irradiation means for irradiating a glass container with light,
A glass container inspecting device, comprising: a detecting unit that detects fluorescence generated in the glass container by the light; and a defect of the glass container is detected by a change in an optical path of the fluorescence detected by the detecting unit.