JPS62257007A - Centralized inspection of container - Google Patents

Abstract

PURPOSE:To perform the centralized inspection of a container, by continuously performing the deformation inspection of the container, the inspection of the flange and neck thereof and the inspection of the outer and inner surfaces thereof at the inspection station of one place in predetermined order. CONSTITUTION:An empty can 1 processed and manufactured is sent to a turret 10 from a feed-in path 11 through a timing screw 12. The confirmation part 20, deformation inspecting part 30, flange/neck inspecting part 40, outer surface inspecting part 50 and inner surface inspecting part 60 of the empty can 1 are arranged in the vicinity of the turret 10 at the interval almost same to the interval of the pockets 10a provided to the turret 10 so as to be capable of simultaneously performing inspection at the inspecting parts 30, 40, 50, 60. When the empty can 1 is present in each inspection pocket 10a, the performance signal of the succeeding inspection is transmitted to each of the inspecting parts 30, 40, 50, 60 through a control part 70 to continuously perform inspection in predetermined order.

Description

[Detailed description of the invention] [Industrial use! ? TECHNICAL FIELD The present invention relates to a method for intensively inspecting containers in which various defects occurring during the manufacturing process of various containers are intensively inspected at one inspection stage 1).

[Prior Art] In the container manufacturing process, various processing is performed depending on the type of container, but sometimes the processing is not sufficient, and the processing may cause damage to the container.
This may cause defects in the container. This defect in the container impairs the appearance of the container, lowers its commercial value, and causes deterioration of the contents. For this reason,
In the manufacturing process of 'eE'H, there is always one inspection step, but the types of inspections that are necessary include, for example, deformation inspection to check for unevenness or buckling of the container, and stamping of the outer surface of the container. There are external surface inspections to check for things such as wrinkles on the neck of the container, or insufficient roundness of the flange9, and neck and flange inspections to check for wrinkles in the neck of the container, or lack of roundness in the flange. Generally, this is carried out immediately after the occurrence of a defect to be inspected or immediately after T-addition II.

It should be solved! ! 1 question] As stated in ゛,
In the conventional container inspection method, an inspection station is provided for each type of inspection, and each inspection is conducted separately and independently. For this reason.

More time is spent inspecting containers during the manufacturing process.
This has been a problem in trying to shorten manufacturing time. Also,
Since the inspection stations are scattered, there is a problem in that the inspection cannot be centrally managed, and an inspector must be assigned to each inspection station.

The present invention has been made in view of the problem described in item L. The present invention has been made in view of the problems listed in item L. By performing the necessary re-inspection of containers at one inspection station, it is possible to perform intensive inspection of containers. The purpose is to provide a method.

[Problem Solution P Setup] In order to reach the F-Ll target, the present invention's 2-test Jj method is as follows:
Container shape inspection, flange and neck inspection? In this method, an inspection including at least a plurality of external inspections and internal inspections is continuously performed at one inspection station using a predetermined number 112.

[Example] An example of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall top view of an inspection station used for carrying out one of the embodiment methods, and in this FIG. 1, 10 indicates a turret in the inspection station;
20 is a confirmation part of container 1.

30 is the deformation inspection part of the container 1, 40 is the flange of the container 1,
50 is an outer surface inspection section of the container 1, and 60 is an inner surface inspection section of the container 1.

The method of this embodiment is intended for inspection of unfilled cans, that is, empty cans, and the following description will be directed to empty cans. therefore.

Empty cans l that have been processed in an empty can processing process (not shown) are sent to the tarleft 10 from a carry-in path 11 via a timing screw 12 or the like.

The turret 10 has a plurality of equally spaced pockets 10a on its outer periphery for transferring empty cans 11, and rotates at a predetermined speed. In addition, each pocket 1 of the turret 10
A rotary table 13 on which an empty can 1 is placed and rotated is provided at the bottom of the 0&. Thereby, the empty can 1 is transported by the turret 10 to each inspection section, and is rotated by the rotary table 13 at each inspection section.

The above-mentioned empty can I confirmation section 20, deformation inspection section 30, flange and neck inspection section 40, outer surface inspection section 50, and inner surface inspection section 60 are in this embodiment.

bokeh/to 10 a
The turrets i,
(This is so that they can be done at the same time in 1.

The confirmation part 20 of the empty can 1 is the blur of the tarleft 10) 10
This is to check whether or not empty can 1 is being sent to pocket a, and when empty can 1 is present in pocket 10a,
The execution signal for subsequent inspections is sent to each inspection section 30 via the section 70.
40, 50, and 60, as well as pocket) loa
If there is no empty can L, a signal indicating that no inspection will be performed even if the pocket loa moves to each inspection section 30, 40, 50, 60 is sent to each inspection section 3 via the control section 70.
Call at 0,40,50,60. As the sensor 21 for confirming the presence of the empty can 1, a contact type or non-contact type general position sensor is used.

The empty can 1 deformation inspection section 30 determines whether the can body of the empty can 1 has buckling or irregularities. Normally, when processing to form a neck or flange at the mouth of an empty can, or when wrapping or tightening the lid of a three-piece can, a load is applied in the axial direction of the can while the An −[
Therefore, buckling T often occurs in one can.

In this way, cans with buckling on the can body have poor edges, which seriously damage the product's closure, and also cause poor tightening, resulting in poor sealing of the can. Therefore, it must be definitely eliminated, and it is one of the most important factors among defective cans.

There are primary sensors that inspect the deformation of cans. First, the laser sensor method shown in FIG. 2 (for example, , Patent Application No. 81-55526),
Second, there is an image sensor system that determines whether a can is good or bad based on the number of failed or non-light-receiving elements in the light-receiving section (for example, Japanese Patent Application No. 81-72294 and patent application filed on April 4, 1988). Thirdly, there is a proximity sensor that places a large number of proximity switches on a can, switches these many proximity switches in a predetermined order, and manually outputs a signal from each proximity switch to determine whether the can is good or bad. In addition to this, there are also species of senna that test for the deformation of ;n, and of course it is limited to the one described in 5. Not done.

The flange and neck inspection part 40 of the empty can 1 is insufficient in length of the flange part of the can 23!1. ``T-'' and the appearance of wrinkles and blackness on the neck of the can. 1 for DI cans etc.
Usually, a flange is formed at the mouth of the can using a flange machine, and a neck-in process is performed on the can using a squeezing machine.
In this case, if the spitter or squeezer malfunctions or if one can has a defective part, defects such as cracks in the flange or wrinkles in the neck will occur. In this way, if the flange part is not long enough or cracked, or if the neck part is wrinkled, it often impairs the sealing performance even when the lid is wrapped and tightened, which can lead to leakage of contents. This is one of the causes of defects that must be definitely eliminated. The following sensors are available for inspecting the flange and neck of cans. First of all, among the sensors that inspect the flange part, the sensor that inspects the lack of flange length is
There is a photoelectric sensor type as shown in FIG. 3(a). In this photoelectric sensor type, a photoelectric sensor 41 irradiates light onto the flange portion and detects and inspects changes in the amount of reflected light caused by insufficient flange length.

Next, as a sensor method for inspecting cracks in the flage portion, firstly, there is a magnetic sensor method as shown in FIG. 3(b). This magnetic sensor type is used when the can is made of a material such as tin, and has a permanent magnet of 4
The flange part is positioned in the static magnetic field of 2, and changes in magnetic field intensity caused by scratches, deformation, etc. of the flange part are detected and inspected using a magnetic spatula 43 placed on the flange part (for example, Second, there is an eddy current sensor system as shown in FIG. 3(C). This eddy current sensor type is used when the can is made of a material such as aluminum.
By passing a high-frequency alternating current through the coil 45 of the high-frequency oscillation base 46 and rotating the can, a vortex is generated in the flange. R, is detected and inspected as a change in inbeatance of the coil (for example.

JP 54-124781).

Furthermore, 5. 34 for inspecting the
As shown in the figure, a photoelectric sensor method (for example, Japanese Patent Laid-Open No. 60-1908
42), there are also others.

There are various sensors that can inspect the flange and neck of a can, and are not limited to the sensors described above.

The outer surface inspection unit 50 of empty cans 1 determines whether or not there are any missing prints or uneven printing in the printing pattern drawn on the outer periphery of the can. However, malfunction of the printer, coater, etc. or a mistake in setting the printing pattern may cause missing marks, uneven printing, or abnormalities in the printing pattern. Baskets with missing or uneven printing will not only affect the aesthetics but also reduce the value of the product.

Cans marked with abnormal patterns i1 have no commercial value and must be eliminated.

The following sensors are available for inspecting the outer circumferential surface of a can. First, there is a photoelectric sensor that determines whether a can is good or bad based on whether a change in the amount of light reflected by the optical T-sensor 51 corresponds to a change in the printed pattern.
(Japanese Unexamined Patent Publication No. 1034/1983). This method is effective for inspecting abnormal patterns, but it can also be used to detect missing prints and uneven printing by utilizing the difference in reflectance between the base of the can and the paint, and detecting this difference as a change in reflected light. Applicable. The second method is a laser sensor method that utilizes a combination of a laser beam with good straightness and the ironing grooves present on the surface of the can base.

That is, the light that has been reflected from the paint shows a planar pattern, whereas the light that has been reflected from the substrate due to printing etc. shows a linear pattern due to the ironing grooves present on the surface of the substrate.

Therefore, on the light-receiving section side, this difference in butter is identified to check for printing omissions. Differences in patterns are clearly visible, allowing reliable inspection. Sensors used for external surface inspection are not limited to the sensors listed above.

The inner surface inspection section 60 of the empty can 1 examines whether there is dirt, W, paint defects, etc. on the inner peripheral surface and bottom surface of the can.The inner surface of the can is where the contents are sold.
There is a reward for keeping it clean. Therefore, the internal surface of the can and the bottom of the can may become dirty or scratched due to rotting or contamination of the contents, contamination of foreign substances, etc.

Cans with defective paint, etc. must be rejected.

As a sensor for inspecting the inner surface of a can, a sensor similar to the sensor used for inspecting the outer peripheral surface of a can can be used. However, in order to inspect the inside of a can, senna must be inserted inside the can.

For example, as shown in FIG. 5, a vertically movable head 62 is provided with a rotary shaft 63 whose tip is bent, and a plurality of photoelectric sensors 61 are arranged on this rotary shaft 63. In this way, when the door 62 is lowered to F or the whistle 1 is raised, the photoelectric sensor 61 is inserted into the can 1, and the can 1 is rotated by the rotation table 13. This makes it possible to reliably inspect the entire inner peripheral surface and bottom surface of the can.

70 is a control unit, each inspection unit 20, 30°40.5Q
, 60, and determine whether the can is good or defective based on the signals from each inspection section 30, 40, 50, and 60. A signal is sent to solenoid valves 72 and 73 provided in the exhaust air pipe 7 via a shift register to sort and transport the cans to the long route or defective can route.

Next, the method of this embodiment will be explained with reference to the flow chart shown in FIG. The cans 1 that have been loaded into Oa (601 in FIG. 6) are conveyed sequentially by the rotation of the turret 10 to the confirmation section 20 and each inspection section 30°40.50.60, where they are placed on a rotary table. 13 rotates (usually one rotation), the sensor 21 detects the blurring.
602 in FIG. 6), and sends the result to the control section 70. When the can 1 is in the pocket 10&, the control unit 70 sends an inspection execution signal to the deformation inspection unit 30, and places the can 1 in the pocket 10&.
If not included, each inspection section 30, 40, 50.6
Sends an inspection unnecessary signal to 0.

The can deformation inspection section 30 detects a sensor 31 based on a signal from the control section 70 when one can 1 is sent to each inspection section.
It is determined whether or not there is buckling or unevenness on the outer peripheral surface of the can 1, and the result is sent to the control section 70. In the control J1 section 70, if the buckling or unevenness is within the range of 2 (-1), 44 constant is performed to ensure no deformation, and the primary can flange and neck inspection IJf is performed.
The inspection execution signal 1) is sent to the section 40. In addition, if the buckling or unevenness is outside the set binary range of 1 circle, it performs 'F-4 determination with the defective can, sends an inspection unnecessary signal to the subsequent valley inspection section 40, 50, 60, and The can detection signal is stored in a shift register.The shift register is a pulse generator (
(not shown), the defective cans are transported to defective can unloading section B.
When the solenoid valve 73 is transferred, an activation signal is sent to the solenoid valve 73 (603 in FIG. 6).

The can flange and neck inspection unit 40 detects cracks and wrinkles in the flange and neck of the can 1 using sensors 41 and 42 based on signals from the control unit 70 when the can 1 is sent to the inspection position. etc., and sends the result to the control unit 70. The control unit 70 determines that there is no abnormality if the flange length is insufficient or cracked, or the neck wrinkles are within a set value, and sends an inspection execution signal to the outer peripheral surface inspection unit 50 of the next can. . If cracks in the flange or wrinkles in the neck are outside the set values, the can is determined to be defective, and each subsequent inspection section 5
0.60, and the defective can detection signal is stored in the shift register (604 in Figure 6).
).

Can external surface inspection section 50? 'rrl is sent to the inspection position, based on the signal from JIWal 17o, the sensor 51 detects any missing prints or markings on the outer circumferential surface of the can l.
It is determined whether there is any unevenness or abnormal pattern, and the result is sent to the control unit 70. The control section 70 determines that there is no abnormality if the printing, punching, etc. are within the range of set values, and sends an inspection execution signal to the inner surface inspection section 60 of the next can. In addition, if the printing defects, etc. are out of the set value range, it is determined that the can is a defective can with printing abnormalities, and an inspection unnecessary signal is sent to each subsequent inspection section 60, and a defective can detection signal is sent to the shift register. It is stored (605 in FIG. 6).

The inner surface inspection section 60 of the can performs almost the same inspection as the outer surface inspection section 50 described above, and if the control section 70 determines that there is no abnormality, the inspected can is finally classified as a food can. (607 in FIG. 6), stores the signal in the shift register, and operates the solenoid valve 72 when the food can is transferred to the unloading section A.

Send the food cans and food cans to the transfer route (608 in Figure 6),
In addition, the control unit 70 found that there was an abnormality on the inner surface of one can.
When 'f4' is performed with defective cans (609 in Figure 6)
, the signal is stored in the shift register, and when the defective can is transferred to the defective can transfer section B, the solenoid valve 73 is operated to send the defective can to the defective can transfer route (6th 810 in the figure).

In addition, it is desirable to arrange each inspection section in the order of inspecting defects that have a large factor contributing to a defective can. When inspecting the deformation, flange, neck, outer surface, and inner surface of a can as described above, It is best to first inspect the can deformation inspection section, then the can flange, neck inspection section, etc. However, the size of the defect factor varies depending on the type of container, use, etc., and is limited to the above order. It's not something you can do.

Furthermore, the present invention is not limited to the embodiments described above, but includes the following modifications, for example.

(D Transferring containers at the inspection station.

If the transfer is performed by a rotary transfer means other than a turret, or by a linear transfer means 1 such as 7 to a Heldcon.

(2J: When the containers at the inspection station are rotated by a rotating means other than a rotating table, such as a belt or roll.

(If you perform an inspection that does not interfere with the sensor, for example, an internal inspection and another inspection at the same time.)

@ Check the inspection contents of the container! ! If additions or changes are made depending on the category.

■ When the container is rotated one or more revolutions at the inspection position of each inspection section to perform each inspection around the entire circumference of one can.

■ When the turret is continuously rotated and the single-turn table is rotated together with the turret to cause the container to revolve and rotate, so that each inspection of the container can be performed continuously without stopping the turret.

■ J: Case in which each test is performed by appropriately combining the above-mentioned embodiments and modified examples.

〔Effect of the invention〕

As shown above, according to 1 of Section 7, various necessary inspections can be conducted at one inspection station, so the central pipe Pfi Atsumachi Moat for inspection F is selected. At the same time, it has the effect of shortening the inspection time and improving inspection accuracy.

[Brief explanation of drawings]

: Figure 31 is an overall perspective view of an example of an apparatus for carrying out the method of the present invention, Figure 2 is a view of the main parts of a can deformation inspection section, and Figure 3 (a
) or C) is the flange of the can. FIG. 4 is a diagram showing the main parts of the can outer surface inspection section, FIG. 5 is a main part diagram of the can inner surface inspection section, and FIG. 6 is a flowchart of the method of one embodiment. 10: Turret 20: Container confirmation part 30:
Deformation inspection section 40: Flange, screw, ri inspection section 50: External inspection section 60: Internal inspection 1! ll:
Part 70: Delay part

Claims (4)

[Claims] (1) Container deformation inspection, flange and neck inspection,
A method for intensively inspecting containers, characterized in that an inspection including at least a plurality of external and internal inspections is continuously performed in a predetermined order at one inspection station. (2) The intensive inspection method for containers according to claim 1, wherein the continuous inspection includes a container deformation inspection, and the container deformation inspection is performed first. (3) The continuous inspection includes a deformation inspection of the can;
Claim 1 or 2, characterized in that the flange and neck inspection, the outer surface inspection, and the inner surface inspection are performed.
Concentrated inspection method for containers described in Section 1. (4) Among multiple tests conducted in a predetermined order,
4. The intensive inspection method for containers according to claim 1, 2 or 3, wherein when a container defect is detected in one inspection, subsequent inspections are not performed.