JP2881444B2 - Container pinhole inspection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for automatically inspecting a pinhole of an aluminum foil container.

2. Description of the Related Art Conventionally, this type of inspection has been performed visually by an operator in a dark room.

Problems to be Solved by the Invention As described above, the inspection by the operator has the following various problems. First, the inspection accuracy varies depending on the operator, and defective products may be overlooked.
Second, the work is monotonous and the operator is easily tired. Third, since the container is handled by the operator's hand, the container may be subject to secondary contamination.

An object of the present invention is to provide a pinhole inspection device that can automatically detect a pinhole in a container without an operator in view of the above circumstances.

Means for Solving the Problems In the container pinhole inspection apparatus according to the present invention, the slat is provided with a container insertion hole large enough to be inserted with a light inflow gap, though the flange cannot pass through. A container transport slat conveyor intermittently driven so that the slats can be sequentially stopped at the inspection station, a light source arranged below the slat when the inspection station is stopped, and when stopped at the inspection station. A vertical cylindrical darkroom forming member with a lid disposed so as to be located above the slat of the slat, and the light receiving portion is downwardly facing the slat container insertion hole when stopped at the inspection station in the darkroom forming member from above. In a container pinhole inspection device consisting of a photodetector placed at A bellows-shaped portion is provided on the peripheral wall of the dark room forming member so that the lower edge of the peripheral wall of the dark room forming member is closely in contact with the periphery of the container insertion hole of the slat when stopped at the inspection station. , The convex lens is horizontally arranged and fixed so as to be located directly below the light receiver, and the light shielding shutter is arranged so as to be able to advance and retreat below the convex lens. .

In the pinhole inspection apparatus for a container according to the present invention, the slat is provided with a container insertion hole large enough that the flange cannot pass through, but the side wall of the container can be inserted with a light inflow gap, and the slat is connected to the inspection station. A container conveying slat conveyor intermittently driven so as to be able to stop sequentially, a light source arranged below the slat when stopped at the inspection station, and a light source arranged above the slat when stopped at the inspection station. A vertical cylindrical darkroom forming member with a lid disposed so as to be positioned, and a light receiving portion is arranged downward so as to face the container insertion hole of the slat when stopped at the inspection station from above in the darkroom forming member. With the receiver, the containers are brought in and out of the inspection station on a conveyor and are then brought into the inspection station. Light emitted from the light source is applied not only to the bottom wall of the container, but also to the side wall, and if there is a pinhole in the container brought into the inspection station, the light emitted from the light source passes through the pinhole, The light that has passed through the container enters the dark room, and the light that has entered the dark room is detected by the light receiver.

Further, the lid of the dark room forming member is fixed to a required height on the slat moving path, and the dark room forming member is formed so that the lower edge of the peripheral wall of the dark room forming member is in close contact with the periphery of the slat container insertion hole when stopped at the inspection station. A bellows-like portion is provided on the peripheral wall of the member, the light receiver is fixedly attached to the lid, and the convex lens is
Since the light-shielding shutter is arranged so as to be able to advance and retreat below the convex lens so as to be located directly below the light receiving portion, the length of the bellows-like portion is adjusted to the height of the lid of the dark chamber forming member. By adjusting the height, the distance between the slat and the light receiver can be set to a required size.

Further, even if the distance between the slat and the light receiver is set to a required value and the light amount is reduced, the light can be collected by the convex lens and received by the light receiver, so that there is no concern that the detection accuracy is impaired.

Further, by opening the shutter at the time of inspection and closing the shutter at other times, unnecessary light does not need to be applied to the light receiver.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The container pinhole inspection device transports the container C by the slat conveyor 11 and inspects the pinhole of the container C being transported at the inspection station S.
12 are driven intermittently so as to sequentially stop at the inspection station S.

The container C is formed of aluminum foil into a cup shape having a side wall A and a bottom wall B, and has a flange F at an edge.

The slat 12 is provided with a container insertion hole 13. The container side wall A is inserted into the container insertion hole 13 at a light inflow interval P, and in this state, the flange F is received at the peripheral edge of the upper end opening of the container insertion hole 13.

A light source 14 is arranged below the slat 12 when the inspection station S is stopped. Light source 14, 220W
Upward halogen lamp. Above the slat 12, a dark room forming member 15 is arranged. Dark room forming member 15
Is composed of a vertical cylindrical peripheral wall 16 and a lid 17 closing an upper end opening of the peripheral wall. The entire peripheral wall 16 is formed as a bellows-like portion 18 with a material like rubber. Although not shown, the lid 17 is attached to and fixed to a horizontal support plate three-dimensionally crossing the conveyor 11. A vertical lifting rod 19 is connected to the lower end of the peripheral wall 16, and the bellows-like portion 18 is expanded and contracted by the lifting and lowering of the lifting rod 19, and when the bellows-like portion 18 extends, its lower edge stops at the inspection station S. The slat 12 at the time is in close contact with the periphery of the container insertion hole 13.

When the light receiver 21 stops the light receiving part 22 in the dark room forming member 15 at the inspection station S, the container insertion hole of the slat 12 is stopped.
13 is arranged so as to face from above, and a convex lens 23 is horizontally arranged so as to be located directly below the light receiving unit 22. The light receiver 21 is fixed to the lid 17 with the body penetrating the lid 17 of the dark room forming member 15. The light receiving unit 22 includes a light receiving element such as a photodiode, a phototransistor, or a photovoltaic cell. The convex lens 23 is fixed by a bracket or the like (not shown). Slats 12 and convex lenses 23
The distance L between them is preferably about 90 to 130 mm. If the same distance L is 90 mm or less, it may be too close to collect all the light passing through the pinhole of the container C.
If the distance is more than 0 mm, the light will be too weak and the light will be weak.
The sensitivity of 1 drops significantly. Further, a shutter 24 that can swing vertically is disposed immediately below the convex lens 23.

When the container C is being moved by the slat 12, the bellows 18 is contracted and the shutter 24 is closed.

When the container C is carried into the inspection station S and stopped, the bellows-like portion 18 is extended, and its lower edge is brought into close contact with the periphery of the container insertion hole 13 of the slat 12, and before and after this, the shutter 24 is opened. When the container C has a pinhole, the light emitted from the light source 14 passes through the pinhole and enters the dark room forming member 15, and the entered light passes through the convex lens 23.
And is detected by the light receiver 21.

When the pinhole is on the bottom wall B of the container C, the light emitted from the light source 14 is directly applied to the bottom wall B, so that the diameter 2
It is possible to detect a size of about μm. On the other hand, when the pinhole is located on the side wall A, the light enters the light inflow gap P emitted from the light source 14 and is weakened. Therefore, although the sensitivity is slightly lowered, it is still possible to detect a pinhole having a diameter of about 30 μm.

According to the present invention, the container is carried into and out of the station by the conveyor, and the light emitted from the light source is applied to the side wall as well as the bottom wall of the container carried to the inspection station, If the container brought into the inspection station has a pinhole, the light emitted from the light source passes through the pinhole, and the light passing through the container enters the dark room,
Since the light receiver detects the light that has entered the dark room, the pinhole can be automatically detected.

Furthermore, by adjusting the length of the bellows-like portion in accordance with the height of the lid of the dark room forming member, the distance between the slat and the light receiver can be set to a required size. The dark room can be formed and released only by expanding and contracting the bellows-like portion without moving up and down, and the structure of the entire apparatus can be made compact.

Further, even if the distance between the slat and the light receiver is set to a required value and the light amount is reduced, the light can be collected by the convex lens and received by the light receiver, so that there is no concern that the detection accuracy is impaired.

In addition, by opening the shutter during inspection and closing the shutter at other times, unnecessary light does not need to be applied to the light receiver, so that the life of the light receiver is prolonged in conjunction with the fixed light receiver. Become.

[Brief description of the drawings]

FIG. 1 is an arrangement diagram showing an embodiment of the present invention. 12 ... slat, 13 ... container insertion hole, 14 ... light source, 15 ...
... dark room forming member, 16 ... peripheral wall, 17 ... lid, 18 ... bellows-like portion, 19 ... elevating rod, 21 ... light receiving device, 22 ... ... light receiving portion,
23: convex lens, 24: shutter, C: container, F:
Flange, A: container side wall, P: gap.

Claims (1)

(57) [Claims] 1. A container insertion hole 13 is provided in the slat 12 such that the flange F cannot pass through, but the container side wall A has a light receiving gap P and a container insertion hole 13 large enough to be inserted therethrough. A container conveying slat conveyor 11 which is intermittently driven so as to be able to stop sequentially, a light source 14 which is arranged below the slat 12 when stopped at the inspection station S, and a light source 14 which is stopped at the inspection station S Slat
The cover 17 has a vertical cylindrical dark room forming member 15 disposed so as to be positioned above the light receiving portion 12, and the light receiving portion 22 is inserted into the container insertion hole 13 of the slat 12 when stopped at the inspection station S in the dark room forming member 15. In the container pinhole inspection device, which comprises a light receiver 21 arranged downward so as to face from the container, the lid 17 of the dark room forming member 15 is fixed to a required height on the slat movement path, and the dark room forming member 15 A bellows-like portion is formed on the peripheral wall 16 of the dark room forming member 15 so that the lower edge of the peripheral wall 16 of the dark room forming member 15 is in close contact with the periphery of the container insertion hole 13 of the slat 12 when stopped at the inspection station S.
The light receiving device 21 is fixedly attached to the lid 17, the convex lens 23 is horizontally arranged and fixed so as to be located directly below the light receiving section 22, and the light-shielding shutter 24 moves forward and backward below the convex lens 23. An apparatus for inspecting a pinhole of a container, wherein the apparatus is arranged so as to be able to perform inspection.