JPH0630008U - Can inspection device - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a can inspection device capable of efficiently inspecting a large number of cans with high accuracy. [Construction] Conveying mechanisms 1, 2 and 3 for continuously conveying coated cans, and a coating state of at least one of an outer surface and an inner surface of the conveyed cans provided in the middle of the conveying mechanisms 1, 2 and 3. Coating inspection means 4 and 5 and a pinhole inspection means 6 provided in the middle of the transport mechanisms 1, 2 and 3 for inspecting the presence or absence of pinholes in the transported can, and the coating inspection means 4 and 5. 5 and / or the pinhole inspection means 6 is provided with a discharging mechanism 7 for discharging the defective can out of the transport mechanisms 1, 2, 3 when a defective can is detected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a can inspection device that inspects a can coating state and the presence or absence of pinholes during transportation of the can.

[0002]

[Prior art]

 Conventionally, cans (for example, beverage cans filled with beverages) are manufactured by deep-drawing aluminum or iron plate material to form a cylinder with a bottom, and then painting the inner and outer surfaces of the product to produce a product. I have to.

However, defects such as formation of pinholes in the can and non-uniform coating may occur during the deep drawing process, so conventionally, after these processes are completed, one by one is visually observed. I try to inspect it for defects.

[0004]

[Problems to be solved by the device]

 However, in the conventional can inspection device, the inspection of the presence or absence of pinholes and the coating state is performed by visual inspection for each can, so the inspection man-hour is enormous and the inspection accuracy varies due to individual differences. There is a problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a can inspection device that can efficiently and accurately inspect a large number of cans.

[0006]

[Means for Solving the Problems]

 The can inspecting device of the present invention is a coating mechanism for continuously transporting painted cans, and a coating mechanism provided in the middle of the transporting mechanism for inspecting the coating state of at least one of the outer surface and the inner surface of the transported can. A defective can is detected in at least one of the inspection means, the pinhole inspection means which is provided in the middle of the transfer mechanism and inspects the transferred can for pinholes, and the coating inspection means or the pinhole inspection means. A discharge mechanism for discharging the defective can to the outside of the transport mechanism when detected is provided.

[0007]

[Action]

 In the can inspection device of the present invention, the painted can is transported by the transport mechanism, and the coating state and the presence or absence of pinholes are inspected by the coating inspection means and the pinhole inspection means provided during the transportation. When a defective can is detected by at least one of the coating inspection means and the pinhole inspection means, the ejection mechanism is driven to eject the defective can out of the transport mechanism. In this way, a large number of cans can be inspected efficiently and continuously and accurately with the coating inspection means and the pinhole inspection means.

[0008]

【Example】

 Hereinafter, a can inspection device according to an embodiment of the present invention will be described with reference to the drawings.

The can inspection device of this embodiment includes a shooter 1 for aligning and dropping the cans C to be inspected, a turntable 2 for intermittently carrying the cans C loaded from the shooter 1, and this turn. A turntable 3 that intermittently conveys the cans C conveyed by the table 2, and an inner surface inspection means that is provided in the middle of the turntable 2 and inspects the coating state of the inner surface of the conveyed cans C, such as a CCD camera. 4, an outer surface inspection means 5 for inspecting the coating state of the outer surface of the transported cans C, for example, a CCD camera, and a pinhole of the transported cans C provided in the middle of the turntable 3. A pinhole inspection means 6 for inspecting and a discharging mechanism 7 for discharging a defective can out of the turntable 3 are provided. The shooter 1 and the turntables 2 and 3 constitute a carrying mechanism of the present invention, and the inner surface inspection means 4 and the outer surface inspection means 5 form a coating inspection means of the present invention.

The pinhole inspection unit 6 includes a light that projects light inside the can C and a light receiving element that is provided outside the can C and detects light leaking from the pinhole.

When a defective can is detected by at least one of the inner surface inspection means 4, the outer surface inspection means 5 and the pinhole inspection means 6, the discharge mechanism 7 comes to a discharge position. The driving unit is driven to be discharged to the outside of the turntable 3.

Next, the operation of this embodiment will be described.

First, the painted can C is put into the shooter 1. As a result, the cans C fall vertically and are supplied to the turntable 2. Here, since the turntable 2 is intermittently beating, the cans C are intermittently conveyed in a circular arc path. Here, the can C is conveyed into the inner surface inspection means 4, and when the can C is stopped during the intermittent conveyance, a light beam is projected onto the inner surface of the can C and is imaged by a camera so as to have a pattern stored in advance. By comparison, it is determined whether or not the can C is defective.

The cans C that have left the inner surface inspection means 4 are transported further downstream by the turntable 2. Here, when the can C is conveyed into the outer surface inspection means 5 and is stopped during the intermittent conveyance, a light beam is projected onto the outer surface of the can C and is imaged by a camera, and a pattern stored in advance is stored. By comparison, it is determined whether or not the can C is defective.

Next, the can C is transferred from the turntable 2 to the turntable 3 and is conveyed by drawing an arc locus by the turntable 3 which is intermittently driven. Then, the can C is conveyed into the pinhole inspection means 6, and when the can C is stopped during the intermittent conveyance, a light beam is projected on the inner surface of the can C to determine whether or not there is a light beam leaking from the can C. Determine if C is bad.

Further, in the discharging mechanism 7, when a defective can is detected in at least one of the inner surface inspection means 4, the outer surface inspection means 5 and the pinhole inspection means 6, the defective can comes to the discharge position. At some times, the drive unit is driven to eject it out of the turntable 3. That is, the positions of the conveyed cans C are made to correspond to each other by detecting the intermittent rotation speed of the turntable 2 and the turntable 3, and the discharge mechanism 7 for each can C has the inner surface inspection means 4 and the outer surface. Comprehensive inspection results of the inspection means 5 will be discharged when the one recognized as a bad can comes to the discharge mechanism.

As described above, in this embodiment, the quality of the can C can be continuously and automatically determined by the inner surface inspection means 4, the outer surface inspection means 5 and the pinhole inspection means 6. Compared to the case where the quality of the cans C is visually judged as in the conventional case, a large number of cans can be inspected very quickly, and the efficiency of inspection work can be improved. Moreover, since the inner surface inspection means 4, the outer surface inspection means 5 and the pinhole inspection means 6 as described above are used, the inspection accuracy can be made uniform for each can C.

[0018]

[Effect of device]

 As described above, according to the can inspection device of the present invention, a transport mechanism for continuously transporting painted cans and an outer surface or an inner surface of the transported can that is provided in the middle of the transport mechanism. Coating means for inspecting at least one of the coating states, a pinhole inspection means provided in the middle of the transport mechanism for inspecting the presence or absence of pinholes in the transported can, and the coating inspection means or the pinhole inspection means. When a defective can is detected in at least one of the above, a discharging mechanism for discharging the defective can to the outside of the transport mechanism is provided, so that efficient and accurate inspection of a large number of cans can be performed. it can.

[Brief description of drawings]

FIG. 1 is a side view showing the overall structure of a can inspection device of the present invention.

[Explanation of symbols]

 1 Shooter (conveyance mechanism) 2 Turntable (conveyance mechanism) 3 Turntable (conveyance mechanism) 4 Inner surface inspection means (painting inspection means) 5 Outer surface inspection means (painting inspection means) 6 Pinhole inspection means 7 Ejection mechanism

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masao Kawanami, 1-1 Shintsutsunaka-dori, Yuki-shi, Ibaraki Prefecture Mitsubishi Material Co., Ltd. Yuki factory (72) Mitsuo Yokoyama 1-1, Shintsutsunaka-dori, Yuki-shi, Ibaraki Mitsubishi Mate Real Inside the Yuki factory

Claims (1)

[Scope of utility model registration request] 1. A transport mechanism for continuously transporting painted cans, and a coating inspection means provided in the middle of the transport mechanism for inspecting the coating state of at least one of the outer surface and the inner surface of the transported can. When a defective can is detected in at least one of the pinhole inspection means for inspecting the presence or absence of pinholes in the transported can, which is provided in the middle of the transportation mechanism, the coating inspection means or the pinhole inspection means,
An inspecting device for a can, comprising a discharging mechanism for discharging the defective can out of the carrying mechanism.