JP3317589B2 - Can lid inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can lid inspection apparatus which is installed in a can lid production line and inspects the appearance quality of the can lid.

[0002]

2. Description of the Related Art Normally, various quality inspections are performed on can lids of canned beverages mass-produced on a production line. The main inspections include, for example, a leak inspection for checking for score (scoring line for opening) cracks and pinholes, and a sealing compound inspection for checking whether a sealing compound for winding is normally applied. , Defect inspection of the outer periphery of the can lid to check for abnormalities such as deformation of the outer curl of the can lid and chipping of the end of the outer curl, and inspection of the inner and outer surfaces of the can lid for dirt on the inner and outer surfaces of the can lid Appearance inspection, pull tab (or stay tab) presence / absence inspection for examining the presence / absence of a pull tab or a stay tab, and the like are included.

Conventionally, when performing these inspections, an inspector removes a product from a production line and visually inspects the product, or uses an automatic inspection device instead of the visual inspection to perform necessary processes (sealing compound coating process, pressing process) of the production line. Etc.) for quality control. That is, each inspection is performed by the inspection devices distributed and installed in the production line.

[0004] However, in recent years, production machines have been speeding up and production capacity has been remarkably improved, so that conventional visual inspection by an inspector cannot cope with the problem, and the inspection apparatus also requires a transfer speed corresponding to the production speed of the production machine. In addition, there has been a demand for faster inspection processing.

As an apparatus for inspecting a can lid at high speed, for example, Japanese Patent Application Laid-Open No. Hei 3-186727 discloses an apparatus for speeding up can lid transport. Also, Japanese Patent Laid-Open No.
Japanese Patent Application Laid-Open No. 9-91511 and Japanese Patent Application Laid-Open No. 3-275236 describe an apparatus for inspecting the appearance of the outer surface of a can lid at high speed.

In the former apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 3-186727, when the speed is increased, a guide for guiding the supply and discharge of the can lid in each can lid inspection device is provided on both sides of the can lid. By extending the rail horizontally, raising the lid support of the inspection device with a lifter, and restricting the can lid to the guide rail, feeding by the supply or discharge turret of the can lid and feeding by the lid support are interrupted. In such a case, troubles (such as clogging and scratches) at the time of delivery of the can lid are prevented even if the transport speed is increased.

In the latter devices described in JP-A-2-91511 and JP-A-3-275236, while revolving intermittently by a turntable,
The product inspection is performed by rotating the can lid at the stop position where the inspection unit is arranged.

[0008]

However, when the speed of the inspection apparatus is increased, the apparatus described in Japanese Patent Laid-Open No. 3-186727 has the following problems.

That is, after the can lids are once stacked, they are separated one by one by a lid cutting device, and at the same time, are pushed by a supply turret and slid on a guide rail to be supplied to an inspection step, where inspection is performed. The completed can lid is transferred to a guide rail for discharge and transported to the next inspection step. Therefore, every time the can lid is delivered, the can lid is supplied and discharged while being regulated by the guide rail,
In the case of performing a plurality of inspections, in each inspection process, after the can lids are temporarily stacked on a stacker or the like, an operation of cutting out one by one from the lower side is repeatedly performed. Therefore, it is easy to deform the outer periphery of the can lid due to contact with the part that regulates the can lid, scratch the inner and outer surfaces, and attach dirt. There is a possibility that this may occur. In addition, on the can lid transfer line connecting between each process,
Slope for transporting the can lid sent from the previous process upward, equipment for stacking and temporarily stocking can lids, and equipment for cutting out the stacked can lids one by one from below. Since each is required, there is a problem that the line becomes longer and the time required for transporting the can lid between the devices becomes longer.

[0010] The present invention described above was made in view of the problems, comprises two or more inspection turret performing inner and outer surfaces appearance quality inspection of the shallow dish-shaped can lid, a plurality in a single test device performs inspection aims at to transfer the can end directly provides can lid inspection apparatus capable of greatly shortening the time required for the inspection process among the inspection turret.

[0011]

The invention as a means for solving the above problems BRIEF SUMMARY OF THE INVENTION, in the can lid inspection device having at least two inspection turret performing visual inspection of the interior and exterior surfaces of the can lid, Suction and release of the can lid
Selectively first holding portion multiple having a mechanism for performing is provided so as to be an equal interval and elevation to the periphery, the first inspection turret having a first rotating body that rotates about a vertical axis and, can lid
The second holding portion multiple having a selectively perform mechanism adsorption and adsorption release of, on the same circumference provided Toma septum, comprising a second rotating body that rotates about a vertical axis the second inspection ter
And a cmdlet, the first rotary member and the second rotating body, in transfer position location of the can lid to be performed between both rotary bodies, and the first holding portion and the second holding portion in a vertical direction while it is disposed to overlap a portion of each other so as to overlap, and lifting means to drive in a vertical direction towards the respective first hold section in the second hold section in the overlap region, receiving Handing over
Compress the space between the holder holding the can lid and the can lid.
While the air is supplied, the holding part
A hander that generates a suction action and sucks and holds the can lid
And a step .

Further, the first time rotary body, along with the rotation about the vertical axis, configured and provided with a rotation mechanism for rotating the first hold portion multiple of the first time rotating body, respectively can do.

[0013]

[Action] can lid inspection apparatus of the present invention by the above-mentioned structure, first inspection turret and the second inspection Tare'
And a plurality of first holding portions of the first rotating body, each rotating about a vertical axis, and a plurality of second holding portions of the second rotating body arranged on the same circumference, respectively. holding the lid, while the respective rotating body rotates, together with the predetermined inspection is performed on the can lid, the can lid the inspection is completed next inspection Tare'
Received door, etc. f is passed. Passing this can lid, for example the if it is delivery to the first inspection turret or we second inspection turret, can lid the completion of the inspection held by the second holding portion comprising a receiving side, the before second rotator reaches the delivery position by rotating the holding cans lids also following inspection turret rather <br/> is sent to the next step, the holding portion is emptied. Then, one of the first holding portions of the rotating first rotator and one of the second holding portions of the same rotating second rotator are vertically positioned at the can lid transfer position in the overlap region of both rotators. with overlap, since the first hold portion at the delivery position approaches the second hold portion rises, the first inspection at this point
Passing can lid between the turret and the second inspection turret, i.e., transfer of the can lids from the first holding portion to the second holding portion is carried out directly. Furthermore, deviates from the 1st rolling body passing rotated position, the first hold portion away from the second hold portion is lowered, the can lid is held by the second holding portion, the empty 1
Interference with the holding part is prevented. And the first that became empty
A new can lid is supplied to the holding unit.

Therefore, the can lid held one by one in each of the plurality of first holding portions of the rotating first rotating body is inspected at high speed and continuously until the can lid rotates and moves to the delivery position. In the transfer position, the transfer is continuously performed at a high speed and continuously to the second holding unit of the second rotating body that has been rotated and moved to the transfer position. It should be noted that the second inspection Tare'
It is substantially similarly performed also be delivery to DOO or we first inspection turret.

Further, with the rotation about the vertical axis of the first Rotating body, by providing a rotation mechanism such that the first hold portion a plurality of rotates respectively, the first hold portion By holding the lids respectively, it is possible to perform a full-circumference inspection of the outer peripheral portion of each can lid with a fixed inspection machine.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A can lid inspection apparatus according to the present invention is installed near the end of a can lid production line to adhere foreign substances on the inner and outer surfaces of the can lid to the finished can lid and to remove a sealing compound. An embodiment applied to a can lid comprehensive inspection apparatus that collectively performs various inspections such as deformation of an outer peripheral portion, presence / absence of a pull tab, and presence / absence of leakage due to a pinhole will be described with reference to the drawings. 1 is a perspective view of the whole can lid inspection apparatus of this embodiment, FIG. 2 is a schematic side view of the apparatus of FIG. 1, FIG. 3 is a schematic plan view thereof, and FIG. FIG. 5 is a sectional view taken along the line IV-IV in FIG. 3 and an explanatory view showing the shape of the air valve. FIG. 5 is an explanatory view showing the can lid transfer operation along the developing direction of the cam. FIG. FIG. 7 is a plan view of a general easy-open can lid, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

First, the can lid 111 inspected by the apparatus of the present embodiment will be described.
As shown in the figure, it has a shallow dish shape with a chuck wall 112 on its periphery, and a score line 114 is carved on the surface of its smooth panel portion 113, and is caulked to the center of this lid body 111 with rivets 115. By pulling the provided ring-shaped pull tab 116, the score line 114 is
Is an easy-open can lid that breaks and opens the panel section 13 along.

Next, a description will be given of the can lid comprehensive inspection apparatus of this embodiment for inspecting the above-mentioned can lid 111. This inspection apparatus 100 includes a score line 114 of the lid 111 and air from the caulking portion of the rivet 115. A first inspection station 101 where leakage is inspected, and a sealing compound 1 applied to the back surface of the chuck wall 112 around the periphery of the lid 111.
The second inspection station 102 performs an inner surface inspection of the lid 111 including the 17 inspections, and the third inspection station 102 performs an outer surface inspection and an outer periphery inspection of the lid 111 including the presence / absence inspection of the pull tab 116.
Inspection station 103 and can lid 11 determined to be non-defective based on the inspection results at these three inspection stations
Discharge station 104 for discharging only 1 to the next process
And four main stations.

As shown in FIG. 2, the rotation axis 11a of the first inspection station 101 and the second inspection station 1
02, the rotation shaft 13a of the third inspection station 103, and the rotation shaft 14 of the discharge station 104.
a are transmission gears 11b, 12b, 13
b and 14b at their lower ends, respectively.
a by the drive motor 107 provided in the lower part
8 and the main gear 109, firstly the transmission gear 11
b is driven, and then the transmission gear 12b
b Further, the transmission gear 14b is driven in conjunction with it. Accordingly, the inspection stations 101, 102, 103 and the discharge station 104 are configured to rotate synchronously by the same drive source.

Next, the configuration of each station will be described. First, the first inspection station 101 separates the stacked can lids 111 one by one from the lower side and supplies the separated can lids 111 to the supply turret 2. And supply turret 2
And a leak inspection device 3 for inspecting the score line 114 for cracks, pinholes, and the like while continuously rotating the can lid supplied through the apparatus.

As the leak inspection device 3, in addition to the method of supplying pressurized air to the inner or outer surface of the can lid and detecting the sound leakage of the pressurized air to the opposite surface, for example, Or a detection device that irradiates light to the inner surface or outer surface side of the can lid and detects light leakage to the opposite surface side.

In the leak inspection device 3, recesses of the holding portions 31 for horizontally placing the can lid 111 are provided at six equally spaced positions on the periphery of the rotating turret 30 rotating with the rotating shaft 11a. I have. On the other hand, the rotating turret 30
A lifter cam 32a having a cylindrical shape is disposed below the cam groove 32b, and a cam groove 32b formed on the outer periphery of the lifter cam 32a.
The cam follower 32c is rotatably engaged with the
A lifter cam mechanism (elevating means) 32 for moving the holding portion 31 up and down with respect to the rotary turret 30 via a is provided.

On the other hand, a rotating body 30a that rotates coaxially with the rotating turret 30 at an interval above the rotating turret 30.
An inspection head 33 having a microphone 35 is provided at an upper position facing the holding portion 31 at a peripheral edge of the rotating body 30a so as to approach and separate relatively.

That is, as shown in FIG.
Is lifted toward the inspection head 33 by the lifter cam mechanism 32, and the periphery of the can lid 111 is pressed against the inspection head 33 via the sealing material 36 to hermetically close the lid. 31 and inspection head 33
Are defined on the outer surface side (upper side in FIG. 6) and the inner surface side of the can lid 111. And
Compressed air is supplied to the inner surface side (lower side) of the lid 111 in the space through the air passage 34, and the can is determined by whether or not a microphone 35 detects a score crack or a sound leaking from a pinhole. The quality of the lid 111 is determined.

The air passage 34 is connected to a compressed air source and a vacuum source via an electromagnetic valve (not shown), and is connected to the holding portion 31 at a predetermined rotation position of the rotating shaft 11a.
A vacuum effect can be applied or compressed air can be supplied via the valve 4. That is, this solenoid valve
Compressed air is supplied when the leak inspection is performed and when the can lid 111 is separated from the holding unit 31 after the inspection, and at other times, that is, when the can lid 111 is received and delivered to the inspection position and delivered from the inspection end. While transporting to the position, the can lid 111 is adsorbed to the holding unit 31 by a vacuum action,
The electrical timing has a lead angle function that can be corrected in accordance with an increase or decrease in the mechanical rotation speed of the leak inspection device 3.

The second inspection station 102 includes:
Inner surface inspection turret 4 for continuously rotating can lid 111
An inner surface inspection device 5 is provided below the inner surface inspection turret 4.
And a CCD camera 5a.

The inner surface inspection turret 4 is fixed to the upper end of a rotating shaft 12a parallel to the rotating shaft 11a of the leak inspection device 3 of the first inspection station 101.
Six holding portions 41 are provided at equal intervals around the lower surface of the lower surface of the lower end of the device. The holding portion 41 is provided with the can lid 1
11 has a tip shape along the chuck wall 112 and the first
Inspection station 101 and second inspection station 102
At the transfer position (position A in FIG. 3) with the concave portion of the holding portion 31 of the leakage inspection device 3.

If the distance to be opposed is too far, the space movement distance of the can lid 111 at the time of delivery becomes long, and the delivery becomes unstable.
Since the holding parts interfere with each other when the heads 1 are separated from each other while rotating, the tips are set to be at the same height or slightly intrude at the rising position of the holding part 31.

In the inner surface inspection turret 4, air passages 43 are formed radially. The outer end of each air passage 43 communicates with the inside of each holding portion 41, and the inner end is the inner surface inspection turret. Disk valve 44 that is in sliding contact with the lower surface of 4
(Shown in FIG. 4 (a)). FIG.
As shown in (b), the sliding surface of the disc valve 44 has an air groove 44a, which is connected to a vacuum source or a compressed air source in the air passage 43 at a predetermined rotation position of the rotating shaft 12a.
44b are provided. Therefore, suction action or compressed air can be selectively applied to the inside of the holding portion 41 as the inner surface inspection turret 4 rotates.

Further, as shown in FIGS. 1, 3, and 5, the inner surface inspection device 5 includes a can lid 111 sucked and held by the holding portion 41.
Is an inspection device which takes an image of the entire inner surface of the can lid 111 with the CCD camera 5a at the moment of passing, and binarizes the image to judge pass / fail, and uses a high-speed general-purpose image processing device 5b in the inner surface inspection device 5. Then, it is inspected whether the sealing compound for winding on the back surface of the chuck wall 112 has any partial chipping, and whether the inner surface is stained by the compound or the like (see FIG. 5A).

The third inspection station 103 includes an outer surface inspection turret 6 for continuously transporting the can lid 111 around and around.
And an outer surface inspection device 8 above the outer surface inspection turret 6.
Are arranged. And this outer surface inspection turret 6
Is fixed to the upper end of a rotating shaft 13a parallel to the rotating shaft 12a.
1 is formed with the opening facing upward. This holding part 6
Reference numeral 1 denotes a concave shape for receiving an outer peripheral wall on the back surface side of the chuck wall 112 of the can lid 111, and the concave portion is a transfer position between the second inspection station 102 and the third inspection station 103 (a position B in FIG. 3). Is disposed so as to face the front end of the holding section 41.

A cylindrical lifter cam 62a is provided below the outer surface inspection turret 6, and a cam follower 62c is rotatably engaged with a cam groove 62b formed on the outer periphery of the lifter cam 62a. A lifter cam mechanism 62 for vertically moving the holding unit 61 with respect to the outer surface inspection turret 6 via the assembly 61a is provided.

Further, the rod assembly 61a is
A rotation shaft 66 having an upper end 1 is provided therein, and a planetary gear 67 is mounted at a lower end thereof. The planetary gear 67 is engaged with a fixed gear 68 provided above the outer periphery of the lifter cam 62a (FIG. 2 and FIG. 5 (C)).
Accordingly, with the revolution of the outer surface inspection turret 6, the holding portion 61 is moved by the lifter cam mechanism 62 and the planetary gear mechanism.
It is configured to orbit while ascending and descending and rotating.

In the outer surface inspection turret 6, six air passages 63 are formed radially. The outer ends of each air passage 63 communicate with the inside of the rod assembly 61a. Through the air passage 66a. The inner end of the air passage 63 is in contact with the upper surface of the inner surface inspection turret 6 by a disc valve 64 which slides.
Is in communication with As shown in FIG. 4C, an air groove for connecting a vacuum source or a compressed air source (not shown) to the air passage 63 at a predetermined rotation position of the rotation shaft 13a is formed on the sliding surface of the disk valve 64. 64a and 64b are provided. Therefore, the suction action or the compressed air is selectively applied to the holding portion 61 via the disc valve 64 at the predetermined rotation position of the rotation shaft 13a.

Further, the outer surface inspection device 8 takes an image of the entire outer surface of the can lid sucked and held by the holding portion 61 by the CCD camera 8a installed above the peripheral portion of the outer surface inspection turret 6, and binarizes the image. This external inspection apparatus 8 uses a high-speed general-purpose image processing apparatus 8b to determine the presence or absence of a pull tab 116,
The outer surface of No. 1 is inspected for contamination (see FIG. 5E).

Further, an optical fiber sensor 7 which approaches each holding portion 61 of the outer surface inspection turret 6 and detects the deformation of the lid outer periphery and the presence or absence of a clip end (outer peripheral curl end).
Is provided on the outer surface inspection turret 6, and the outer periphery of the chuck wall 112 around the outer periphery of the can lid for winding is rotated by rotating the can lid 111 held by the holder 61 with the revolution of the outer surface inspection turret 6. Also, it is possible to inspect whether or not the clip end is missing.

The discharge station 104 is provided with a discharge turret 9 for continuously transporting the can lid 111 around the first and third inspection stations 101 and 10.
Can lid 111 determined to be non-defective by inspection in 2 and 103
A discharge conveyor 105 for discharging only the discharge turret 9 is provided below the discharge turret 9. This discharge station 10
4 has a configuration similar to that of the above-described second inspection station 102. As shown in FIG. 4D, the positions of the air grooves 94a, 94b, 94c, and 94d of the disk valve 94 and the can lid 111 are changed. The only difference is that an electromagnetic valve (not shown) for discharging is provided.

That is, the air grooves 94a, 94b, and 94c of the disc valve 94 are so arranged that the can lid 111 delivered from the third inspection station 103 is discharged into predetermined portions at a predetermined location while being separated into non-defective products and defective products. , 94d are provided, and if the can lid 111 held by the holding section 91 is determined to be non-defective, the solenoid valve supplies compressed air to the air groove 94a to adsorb the can lid held by the holding section 91. 111 is discharged to the discharge conveyor 105. The inspection result of each inspection device is sent to a monitor unit (not shown). The monitor unit determines that the inspection data is non-defective if the inspection data is within the set range,
The non-defective discharge signal is stored in the shift register. If it is out of the setting range, it is determined that the product is defective, the defective product discharge signal is stored in the shift register, and the content of the defect is displayed on the screen.

After each lid is transferred to the discharge station 104, when each holding section 91 comes to each discharge position, each discharge signal is received and the solenoid valve is operated.
Discharge non-defective products and defective products separately. Therefore, when it is determined that the product is non-defective, upon passing over the discharge conveyor 105, the discharge signal is received, the solenoid valve is operated, and the discharge is performed to the discharge conveyor 105. On the other hand, if it is determined that the product is defective, the discharge signal is not received on the discharge conveyor 105, and when it passes through the discharge conveyor 105 and reaches the reject unit 106, the discharge signal is received and the solenoid valve is activated. It is configured to discharge defective products.

In FIG. 5, reference numerals 5c and 8c denote ring-shaped lighting devices.

Next, the operation of this embodiment constructed as described above will be described. The can lids 111 supplied in a stacked state are separated one by one by the lid cutting device 1 and supplied by the supply turret 2. It is supplied to the first inspection station 101. While the supplied can lid 111 is transported to the transfer position between the first inspection station 101 and the second inspection station 102, a leak inspection is performed, and the result of the pass / fail judgment is sent to the monitor unit.

That is, the leak inspection at the first inspection station 101 is performed by the can lid 111 held by the holder 31.
Is lifted by the lifter cam mechanism 32 during orbiting, the upper part thereof is sealed by the inspection head 33, and compressed air is supplied to the space between the holding portion 31 and the lower surface of the can lid 111. If there is a crack or a pinhole in the can lid 111, compressed air is blown out therefrom, and an ultrasonic wave generated when the compressed air is blown out is detected by the microphone 35, and it is determined that the defective air leaks. You. If no ultrasonic wave is detected, it is determined to be good. Then, the result of the pass / fail judgment is sent to the monitor unit and stored as emission data.

When the leakage inspection is completed, the holding unit 3
The inspection head 3 is lowered by the lifter cam mechanism 32
3 and is delivered to the second inspection station 102 at the delivery position a.

At the time of the transfer, the can lid 111 held by the holding portion 31 of the rotating turret 30 of the first inspection station 101 is sucked by the holding portion 41 on the lower surface of the inner surface inspection turret 4 of the second inspection station 102. Then, it is directly delivered and held by the holding portion 41 in a predetermined state with the inner surface facing downward. When the inner surface inspection is performed by the inner surface inspection device 5 while traveling around the second inspection station 102 and a defect such as chipping of the sealing compound or contamination of the inner surface due to the adhesion of the compound is detected, it is determined as a defective product. If no defect is detected, it is determined to be non-defective, and the result of the determination is sent to the monitor unit and stored as emission data.

When the inner surface inspection is completed, the can lid 111 sucked and held on the lower surface of the inner surface inspection turret 4 at the transfer position b between the second inspection station 102 and the third inspection station 103 is brought into contact with the lower side from below. Holder 6 of turret 6 for external inspection of inspection station 103
The can lid 111 is directly delivered by being sucked and held by the outer surface facing upward, and the can lid 111 held by the holding portion 61 rotates while rotating.

That is, the holding portion 61 at the peripheral edge of the outer surface inspection turret 6 of the third inspection station 103 is driven up and down by the lifter cam mechanism 62, and rotates while rotating by the action of the planetary gear 67. When it rises to the highest position and comes close to the can lid 111, the compressed air instantaneously flows into the holding portion 41 on the inner surface inspection turret 4 side where the air groove 44b of the disc valve 44 communicates and sucks the can lid 111. At the same time as the suction is released, and at the same time, the can lid 111 is suctioned by communicating with the air groove 64 a connected to the vacuum source of the disk valve 64 on the third inspection station 103 side, and is suctioned by the holding portion 61. (See FIG. 5C).

Then, the holding portion 6 of the outer surface inspection turret 6
After receiving the can lid 111, the lifter cam mechanism 6
2 to prevent interference with the other holding portions 31 and 61, and inspect the presence or absence of the pull tab 116 of the can lid 111 and dirt on the outer surface by the outer surface inspection device 8 while rotating while rotating. If no tab and dirt are detected, it is determined that the product is defective, and the result of the determination is sent to the monitor unit and stored as discharge data. further,
The can lid 111, which is conveyed around while rotating, is inspected by the optical fiber sensor 7 for the presence or absence of a clip end on the outer periphery, and the can lid 111 in which the loss of the clip end is detected is determined as a defective product. The result is sent to the monitor unit and stored as emission data.

Then, during one round of the third inspection station 103, the can lid 111 having completed the outer surface inspection by the outer surface inspection device 8 and the outer periphery inspection by the optical fiber sensor 7.
Are the third inspection station 103 and the discharge station 1
At the transfer position C of No. 04, they are transferred directly and continuously. That is, at the transfer position c, the holding portion 61
Is lifted by the lifter cam mechanism 62 and approaches the holding portion 91 of the discharge station 104 from below. At this time, the disc valve 6
The air groove 64b connected to the compressed air source 4 communicates with the compressed air, and the compressed air is instantaneously supplied to the holding portion 61 to release the suction. At the same time, the compressed air is connected to the vacuum source of the disk valve 94 of the discharge station 104. The air groove 94a communicates.
As a result, the can lid 111 is attached to the holding portion 9 of the discharge turret 9.
Adsorbed to 1.

The can lid 111 held by the holding unit 91 at the discharge station 104 is conveyed one after another by the discharge data stored in the monitor unit in advance based on the inspection results at the inspection stations 101, 102, and 103. The can lid 111 is distinguished into a non-defective product and a non-defective product. First, when the air groove 94b connected to the compressed air source of the disc valve 94 communicates with the non-defective product, the suction is released and the non-defective product is removed to the next process. Conveyor 10 to be conveyed to
Passed to 5. Then, the remaining defective product is adsorbed by the holding unit 91 and further transported by communicating with the air groove 94c connected to the vacuum source of the disk valve 94, and reaches the reject unit 106 for collecting the defective product. The air groove 94d connected to the compressed air source of the disc valve 94 communicates, and the suction is released and discharged.

Therefore, the delivery of the can lid 111 includes the first delivery from the supply turret 2 to the first inspection station 101, the second delivery from the first inspection station 101 to the second inspection station 102, and the second delivery station A total of five transfer operations are performed: a third transfer from the second inspection station 102 to the third inspection station 103, a fourth transfer from the third inspection station 103 to the discharge station 104, and a fifth transfer from the discharge station 104 to the discharge conveyor 105. Will be done.

Each of the first and fifth transfer operations is a conventional transfer operation, and is the same as the conventional one.
Are guided by a guide member, and are positioned and delivered. On the other hand, each of the second, third and fourth delivery operations is a unique delivery mechanism of the can lid comprehensive inspection apparatus 100 of this embodiment.
In this way, by directly passing the container, the can lids 111 are stacked by being guided by the slope-shaped guide member as in the related art, and the stacked can lids are peeled one by one from the lower side and supplied to the inspection device. Is no longer needed,
It can be delivered directly from the holding unit 41 to the holding unit 61.

In the second inspection station 102 where the inner surface inspection is performed, the inner surface is attached to the lower surface of the inner surface inspection turret 4 so that the inner surface is on the lower side. 6, the holding surface of the can lid 111 is transferred from the outer surface to the inner surface at the transfer position, so that the outer surface inspection can be performed continuously after the inner surface inspection.

As described above, according to the can lid comprehensive inspection apparatus 100 of the present embodiment, the inspection apparatuses which have conventionally been distributed and arranged for each type of inspection in the can lid production line are concentrated at one place. In addition, since the can lid 111 can be directly transferred between inspection stations, the time required for delivery, transportation and inspection can be significantly reduced, and the length of the production line can be significantly reduced. it can.

Further, when the can lid is transferred from the inspection station to another inspection station, the can lid is directly transferred by the vacuum action and the compressed air. In addition, deformation and damage of the outer peripheral portion of the can lid due to sliding contact with guides or the like can be eliminated. In addition, since can lids can be directly transferred between inspection stations,
It is not necessary to provide a supply / discharge facility for the can lid, and the supply / discharge facility for the can lid is simplified, which is extremely advantageous for high-speed conveyance, and 100% inspection can be performed in response to an increase in the speed of production machines.

In the above embodiment, the can lid 111 was used.
Inspection of internal inspection, inner surface inspection, outer surface inspection, outer periphery inspection, tab-free inspection and other inspections at one place were explained. It can be installed in parallel with another inspection device that performs an inspection and performs another partial inspection such as a leakage inspection. Also,
Remove the can lid from the first inspection station to the second inspection station
From the third inspection station
The method according to claim 1, wherein
The “first inspection turret” corresponds to the “rotation” in the above-described embodiment.
Turret 30 "and" external inspection turret 6 "
The “first holding part” in claim 1 is the “holding part 3” in the embodiment.
1 ”and“ holding part 61 ”are further added to the“ second detection
Inspection turret ”is the“ Inner surface inspection turret ”
4 "and" discharge turret 9 ", and furthermore, claim 1.
The “second holding unit” of the embodiment corresponds to the “holding unit 41” and the “holding unit” in the embodiment.
Holding part 91 "and the" elevating means "of claim 1
The “lifter cam mechanism 32” and “lifter cam machine”
"Structure 62", and also the "delivery means" of claim 1
Is not shown in the embodiment.
Solenoid valve "and" disc valve 64 "respectively.
You. On the other hand, from the second inspection station to the third inspection station.
In the case of handing over to the first inspection
“Internal inspection turret” in the above-described embodiment.
4 ", and the" first holding portion "of claim 1
The “holding portion 41” further includes “second inspection tare” according to claim 1.
Is the same as “External inspection turret 6” in the example.
Still further, the "second holding portion" of claim 1 is the "second holding portion" in the embodiment.
Holding part 61 "and the" elevating means "of claim 1
The "lifter cam mechanism 62" in the example, and also claims
The “delivery means” of the item 1 is “disc valve” in the embodiment.
44 "respectively.

[0056]

As described above, according to the can lid inspection apparatus of the present invention, the inner surface inspection and the outer surface inspection, which are distributed and arranged in the conventional can lid production line, are assembled at one place. Inspections can be performed continuously and efficiently, and can be delivered directly from an inspection station to another inspection station without providing any guides, so high-speed transport and high-speed inspection can be performed without damaging the can lid. ,
The inspection processing capacity can be improved, and the length of the can lid production line can be shortened.

Further, if a rotation mechanism is provided so that each holding portion of the inspection station rotates by rotation of the rotating body, it is possible to inspect the entire circumference of the outer peripheral portion of the can lid.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a can lid comprehensive inspection apparatus according to one embodiment of the present invention.

FIG. 2 is a schematic side view of the apparatus of this embodiment.

FIG. 3 is a schematic plan view of the same device.

FIG. 4 is a diagram showing an air pipe for suction and separation of the apparatus.
FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.

FIG. 5 is an explanatory view showing a can lid transfer operation of the same device along a developing direction of a cam.

FIG. 6 is an explanatory diagram showing a detection principle of a leakage inspection of the same device.

FIG. 7 is a plan view of a general easy-open can lid.

8 is a sectional view taken along line VIII-VIII in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 3 Leakage inspection device 4 Inner surface inspection turret 5 Inner surface inspection device 6 Outer surface inspection turret 7 Outer surface inspection optical fiber sensor 8 Outer surface inspection device 12a Rotating shaft 13a Rotating shaft 41 Holder 61 Holder 62 Lifter cam mechanism 67 Planetary gear

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-186727 (JP, A) JP-A-3-275236 (JP, A) JP-A-4-118125 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G01N 21/84-21/958 B21D 51/26 B21D 51/46

Claims (2)

(57) [Claims] 1. A can lid inspection device having at least two inspection turret performing visual inspection of the interior and exterior surfaces of the can lid, Bei selectively performs mechanism adsorption and adsorption release of the can lid
The example was the number double the first holding unit is and can be raised and lowered an equal interval in the peripheral portion
Provided, the first inspection turret having a first rotating body that rotates about a vertical axis, adsorption and the adsorption release of the can lid
The second holding portion multiple having a selectively perform mechanism is, on the same circumference provided Toma septum second inspection turret having a second rotating body that rotates about a vertical axis has the door, said a first rotating body and the second rotating body, in transfer position location of the can lid to be performed between both rotary bodies, and the first holding portion and the second holding portion overlap in the vertical direction while it is disposed to overlap a portion of each other such, an elevation means to drive the respective first hold section in the overlap region in the vertical direction toward the second hold section receives and passes Holding the side can lid holding
When the compressed air is supplied to the space between the
Then, a suction action is generated in the holding part on the
A can lid inspection device, comprising: a delivery means for holding a lid by suction . Wherein said first time rotary body, along with the rotation about the vertical axis, that it comprises a rotation mechanism for rotating each of the plurality of the first hold portion of the first Rotating body The can lid inspection device according to claim 1, wherein: