JPH0850102A - Can lid inspection device - Google Patents

Abstract

PURPOSE:To try to improve check processing capability without damaging a can-top. CONSTITUTION:A can-top check device is provided with at least two stations, namely, a check station 102 for checking the internal surface of a can-top and a check station 103 for checking the external surface. This check device is also provided with turrets 4 and 6 for carrying can-tops in their check position, etc., by holding them at plural holding units 41 and 61 of these station 102 and 103, a check machine for performing required check for the can-tops held at the holding units 41 and 61, and a lifter cam mechanism 62 for lifting or lowering the can-tops for which the check in one check station 102 up to the delivery height so as to directly deliver the can-tops to the next check station 103.

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 device installed in a can lid manufacturing line to inspect the can lid appearance quality.

[0002]

2. Description of the Related Art Usually, various quality inspections are performed on can lids of beverage cans that are mass-produced on a production line. Main inspections include, for example, leak inspection to check for the presence of score (opening score) cracks, pinholes, etc., and sealing compound bound inspection to check whether the sealing compound for winding is normally applied. , Can lid outer peripheral curl portion for inspecting for abnormalities such as deformation of outer curl portion of can lid for winding tightening, chipping of end portion of outer curl, and inner and outer surface of can lid for inspecting can lid inner and outer surfaces for contamination Appearance inspection, pull tab (or steion tab) presence / absence inspection for inspecting the presence or absence of a pull tab or a steion tab, and the like can be mentioned.

Conventionally, when performing these inspections, an inspector pulls out a product from the production line and visually inspects it, or an automatic inspection device that replaces the visual inspection is provided with a necessary process (sealing compound coating process, pressing process) of the production line. Etc.) have been installed for quality control. That is, the respective inspections were performed by the inspection devices distributed and installed in the manufacturing line.

However, in recent years, since the production machine has been speeded up and the production capacity has been remarkably improved, it is not possible to deal with it by the visual inspection by the inspector as in the conventional case, and the inspection device also changes the conveying speed according to the production speed of the production machine. There has been a demand for faster inspection processing.

As an apparatus for inspecting a can lid at a high speed, for example, Japanese Patent Laid-Open No. 3-186727 describes an apparatus in which the can lid is conveyed at a high speed. In addition, Japanese Unexamined Patent Publication
-91511 and Japanese Patent Laid-Open No. 3-275236 describe an apparatus for inspecting the outer surface of the can lid at high speed.

In the former device disclosed in Japanese Patent Laid-Open No. 3-186727, a guide for guiding the supply and discharge of the can lid in each can lid inspection device when speeding up is provided. By extending the rail horizontally, raising the lid pedestal of the inspection device with a lifter, and restricting the can lid to the guide rail, the feeding or discharging of the can lid and the feeding by the lid pedestal are interrupted. Instead, it can be performed continuously and stably, and even when the transport speed is increased, troubles (occurrence, scratches, etc.) during delivery of the can lid are prevented.

Further, in the latter devices disclosed in Japanese Patent Laid-Open Nos. 2-91511 and 3-275236, the turntable intermittently revolves,
The product is inspected by rotating the can lid at the stop position where the inspection unit is arranged.

[0008]

However, in increasing the speed of the inspection apparatus, the apparatus described in the above-mentioned Japanese Patent Laid-Open No. 3-186727 has the following problems.

That is, the can lids are once stacked and then separated one by one by the lid cutting device, and are pushed by the feed turret and slid on the guide rails to be fed to the inspecting step. The finished can lid is transferred onto the guide rail for discharge and conveyed to the next inspection process. Therefore, every time the can lid is delivered, the can lid is supplied and discharged while being regulated by the guide rails.
In the case of performing a plurality of inspections, in each inspection process, the can lids are once stacked on a stacker or the like and then the operation of cutting out one by one from the lower side is repeated. Therefore, it is easy to deform the outer peripheral part of the can lid, scratch the inner and outer surfaces, and attach dirt due to contact with the part that regulates the can lid. There was a risk of causing it. In addition, on the can lid transfer line that connects each process,
The slope that conveys the can lids sent from the previous process upwards, the equipment that stacks the can lids and temporarily stocks them, and the device that cuts out the stacked can lids one by one from the bottom side. Since they are required respectively, there is a problem that the line becomes long and the time required for carrying the can lid between the respective devices becomes long.

The present invention has been made in view of the above problems, and is provided with two or more inspection stations for inspecting the external appearance quality of the inner and outer surfaces of a shallow dish-shaped can lid, and a plurality of inspections can be performed by a single inspection device. In addition to the above, it is an object of the present invention to provide a can lid inspection device capable of directly delivering a can lid between inspection stations and greatly shortening the time required for the inspection process.

[0011]

As a means for solving the above-mentioned problems, the present invention provides a can lid inspection device having at least two inspection stations for inspecting the outer surface of an inner surface and an outer surface of a can lid. A plurality of first holding can lids
A first inspection station provided with holding parts provided at equal intervals on the peripheral part and provided with a first rotating body which rotates about a vertical axis;
A second inspection station provided with a plurality of second holders for holding the can lids, which are provided on the same circumference at equal intervals and are capable of moving up and down, and provided with a second rotating body that rotates about a vertical axis. Then
The first rotating body and the second rotating body are part of each other such that the first holding portion and the second holding portion are vertically overlapped with each other at a can lid transfer position performed between the both rotating bodies. Are arranged so as to overlap with each other, and an elevating means for vertically driving the second holding parts toward the first holding parts in the overlap region is provided.

Further, the second rotating body may be provided with a rotation mechanism for rotating each of the plurality of second holding portions of the second rotating body along with rotation about a vertical axis. it can.

[0013]

According to the can lid inspection apparatus of the present invention having the above-described configuration, the first inspection station and the second inspection station each have a plurality of first rotary bodies that rotate about a vertical axis. The can lid is held by the holding portion and the plurality of second holding portions of the second rotating body arranged on the same circumference, and a predetermined inspection is performed on the can lid while each rotating body rotates. And the can lid that has been inspected is delivered to the next inspection station or the like. When the can lid is delivered from the first inspection station to the second inspection station, for example, the can lid held by the second holding portion on the receiving side and finished the inspection is the second rotating body. Before the can rotates and reaches the delivery position, the held can lid is sent to the next inspection station or the next process to empty the holding part. Then, one of the first holding portions of the rotating first rotating body and one of the second holding portions of the second rotating body that also rotate are vertically aligned at the can lid transfer position in the overlap region of both rotating bodies. And the second holding portion rises and approaches the first holding portion at this delivery position,
At this point, the transfer of the can lid between the first inspection station and the second inspection station, that is, the transfer of the can lid from the first holding unit to the second holding unit is directly performed. Further, when the second rotating body rotates and comes out of the delivery position, the second holding unit descends and separates from the first holding unit, and the can lid held by the second holding unit and the empty first holding unit. Interference is prevented. Then, a new can lid is supplied to the emptied first holding portion.

Therefore, the can lids, which are respectively held one by one by the plurality of first holding portions of the rotating first rotary body, are inspected at high speed and continuously before being rotated and moved to the delivery position. At the delivery position, it is delivered at high speed and continuously to the second holding portion of the second rotating body that has also rotated and moved to the delivery position. It should be noted that the case of delivering from the second inspection station to the first inspection station is performed in substantially the same manner.

Further, if a rotation mechanism is provided so that each of the plurality of second holding portions rotates about the rotation of the second rotating body about the vertical axis, each second holding portion has a lid body. By holding each of them, it is possible to perform the entire circumference inspection of the outer peripheral portion of each can lid by the fixed inspection machine.

[0016]

EXAMPLES A can lid inspection device of the present invention is installed near the end of a can lid manufacturing line, and foreign matter adheres to the inside and outside of the can lid with respect to the finished product of the can lid, and a sealing compound is missing. An embodiment applied to a comprehensive can lid inspection device for collectively performing various inspections such as deformation of the outer peripheral portion, presence / absence of pull tabs, presence / absence of leakage due to pinholes will be described with reference to the drawings. 1 is a perspective view of the entire can lid inspecting apparatus of this embodiment, FIG. 2 is a schematic side view of the apparatus of FIG. 1, FIG. 3 is a schematic plan view of the same, and FIG. 4 is an air pipe for suction and peeling. The IV-IV sectional view shown 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 deployment direction of the cam, and FIG. 6 is an explanation showing the detection principle of the leakage inspection. 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 to be inspected by the apparatus of this embodiment will be described. For example, FIGS.
As shown in FIG. 3, it has a shallow plate shape having a chuck wall 112 on its periphery, and a score line 114 is engraved on the surface of the smooth panel portion 113. The score line 114 is caulked with a rivet 115 at the center of the lid body 111 and attached. By pulling the ring-shaped pull tab 116, the score line 114
It is an easy-open can lid that opens by breaking the panel portion 13 along the line.

Next, the can lid comprehensive inspection device of this embodiment for inspecting the above can lid 111 will be described. This inspection device 100 has an air from the score line 114 of the lid body 111 and the caulking portion of the rivet 115. A first inspection station 101 for inspecting for leaks, and a sealing compound 1 applied to the back surface of the chuck wall 112 at the periphery of the lid 111.
The second inspection station 102 for inspecting the inner surface of the lid body 111 including the inspection 17 and the third for performing the outer surface inspection and lid outer periphery inspection of the lid body 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
It consists of four main stations.

Further, as shown in FIG. 2, the rotating shaft 11a of the first inspection station 101 and the second inspection station 1
No. 02 rotary shaft 12a, third inspection station 103 rotary shaft 13a, and discharge station 104 rotary shaft 14a.
a is a transmission gear 11b, 12b, 13 that meshes with each other.
b, 14b at the lower end of each,
The drive motor 107 provided at the lower part of the
8 and the main gear 109, firstly the transmission gear 11
b is driven, and then the transmission gear 12b to the transmission gear 13
b Further, the transmission gear 14b is driven in an interlocking manner. Along with this, the inspection stations 101, 102, 103 and the discharge station 104 are configured to rotate synchronously by the same drive source.

Next, the structure of each station will be described. First, the first inspection station 101 separates the stacked can lids 111 from the lower side one by one and supplies them to the supply turret 2. And supply turret 2
A leakage inspection device 3 is installed to inspect the score line 114 for cracks or pinholes while continuously orbiting the can lid supplied via the.

As the leakage inspection device 3, in addition to the method of supplying pressurized air to the inner surface or the outer surface side of the can lid and detecting the sound leakage of the pressurized air to the opposite surface side, for example, pressurized air There is a detection device for detecting a minute leak pressure due to, or a detection device for irradiating light to the inner surface or the outer surface side of the can lid and detecting it by leaking a light beam to the opposite surface side.

Further, in the leakage inspection device 3, the concave portions of the holding portion 31 for horizontally mounting the can lid 111 are provided at six positions on the peripheral portion of the rotary turret 30 which rotates together with the rotary shaft 11a. There is. On the other hand, rotating turret 30
A cylindrical lifter cam 32a is provided below the cam, and a cam groove 32b formed on the outer periphery of the lifter cam 32a.
The cam follower 32c is rotatably engaged with the rod 31
A lifter cam mechanism (elevating means) 32 for vertically moving the holding portion 31 with respect to the rotary turret 30 via a is provided.

On the other hand, a rotating body 30a which rotates coaxially with the rotating turret 30 at a distance 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 the peripheral edge of the rotating body 30a so as to relatively approach and separate from each other.

That is, as shown in FIG.
The can lid 111 placed on the can is lifted toward the inspection head 33 by the lifter cam mechanism 32, and the peripheral edge of the can lid 111 is pressed against the inspection head 33 via the sealing material 36 to seal it. 31 and inspection head 33
A space surrounded by and is 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 body 111 in the space through the air passage 34, and the microphone 35 detects whether score cracks or sound leaking air from pin holes is detected. The quality of the lid 111 is determined.

The air passage 34 is connected to a compressed air source and a vacuum source via a solenoid valve (not shown), and the air passage 3 is connected to the holding portion 31 at a predetermined rotation position of the rotary shaft 11a.
It is possible to apply a vacuum action or to supply compressed air via 4. That is, this solenoid valve
Compressed air is supplied at the time of the leak inspection and at the time of finishing the inspection and separating the can lid 111 from the holding part 31. At other times, that is, when the can lid 111 is received and delivered to the inspection position and from the inspection end. While being transported to the position, the can lid 111 is attracted to the holding portion 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 leakage inspection device 3.

Further, the second inspection station 102 has
Inner surface inspection turret 4 for continuously rotating the can lid 111
And below this inner surface inspection turret 4, an inner surface inspection device 5
CCD camera 5a is provided.

The inner surface inspection turret 4 is fixed to the upper end of a rotary shaft 12a parallel to the rotary shaft 11a of the leakage inspection device 3 of the first inspection station 101, and the inner surface inspection turret 4 is provided.
Six holding portions 41 are provided at regular intervals on the lower surface peripheral portion at equal intervals with the tip thereof facing downward. This holding portion 41 is used for the can lid 1.
11 has a tip shape along the chuck wall 112.
Inspection station 101 and second inspection station 102
It is arranged so as to face the concave portion of the holding portion 31 of the leakage inspection apparatus 3 at the delivery position (the position of A in FIG. 3).

If the facing distance 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 portions interfere with each other when 1 is circulated and separated from each other, the tips of the holding portions 31 are set at the same height or slightly intruded at the raised position of the holding portion 31.

Air passages 43 are radially formed in the inner surface inspection turret 4, the outer ends of the air passages 43 communicate with the insides of the holding portions 41, and the inner ends of the inner surface inspection turrets. Disc valve 44 slidingly contacting the lower surface of 4
(Shown in FIG. 4A). FIG.
As shown in (b), on the sliding surface of the disc valve 44, at the predetermined rotation position of the rotating shaft 12a, air grooves 44a for connecting the air passage 43 to a vacuum source or a compressed air source,
44b are provided. Therefore, as the inner surface inspection turret 4 rotates, suction or compressed air can be selectively applied to the inside of the holding portion 41.

Further, as shown in FIGS. 1, 3 and 5, the inner surface inspection apparatus 5 has a can lid 111 sucked and held by a holding portion 41.
Is an inspection device that 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 determine whether the image is good or bad. In the inner surface inspection device 5, a high-speed general-purpose image processing device 5b is used. Then, it is inspected whether the sealing compound for winding and tightening on the back surface of the chuck wall 112 is partially broken, and whether or not the inner surface is contaminated by the compound or the like (see FIG. 5A).

In addition, the third inspection station 103 has an outer surface inspection turret 6 for continuously circulating the can lid 111.
And the outer surface inspection device 8 above the outer surface inspection turret 6.
Is provided. And this external inspection turret 6
Is fixed to the upper end of a rotary shaft 13a parallel to the rotary shaft 12a, and six concave holding portions 6 are equidistantly provided on the peripheral edge of the upper surface.
1 is formed with the opening portion facing upward. This holding part 6
Reference numeral 1 denotes a concave shape for receiving an outer peripheral wall of the can lid 111 on the back surface side of the chuck wall 112, and the concave portion is a transfer position between the second inspection station 102 and the third inspection station 103 (position B in FIG. 3). Is arranged so as to face the tip of the holding portion 41.

A cylindrical lifter cam 62a is disposed 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 to form a rod. A lifter cam mechanism 62 for moving the holding portion 61 up and down with respect to the outer surface inspection turret 6 via the assembly 61a is provided.

The rod assembly 61a has a holding portion 6
A rotary shaft 66 having the upper end 1 attached thereto is provided inside thereof, and a planetary gear 67 is attached to the lower end thereof. The planetary gear 67 meshes with a fixed gear 68 provided above the outer periphery of the lifter cam 62a (FIG. 2 and FIG. 5 (C)).
Therefore, as the outer surface inspection turret 6 revolves, the holding portion 61 is formed by the lifter cam mechanism 62 and the planetary gear mechanism.
It is configured to go up and down and rotate while rotating.

Further, in the outer surface inspection turret 6, six air passages 63 are radially formed, and the outer ends of the air passages 63 communicate with the inside of the rod assembly 61a, and further the rotary shaft 66. Through the air passage 66a. Further, the inner end of the air passage 63 slidably contacts the upper surface of the inner surface inspection turret 6 with a disc valve 64.
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 rotational position of the rotary shaft 13a is formed on the sliding surface of the disc 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 rotating shaft 13a.

The outer surface inspection device 8 photographs 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. The external inspection device 8 is a processing device that performs processing to determine pass / fail, using the high-speed general-purpose image processing device 8b in the external surface inspection device 8 to determine the presence or absence of the pull tab 116 and the can lid 11.
The outer surface of No. 1 is inspected for dirt (see FIG. 5 (E)).

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

Further, the discharge station 104 is provided with a discharge turret 9 which continuously conveys the can lid 111 in a circular manner, and each of the first to third inspection stations 101, 10 is provided.
Can lid 111 determined to be non-defective by inspection in Nos. 2 and 103
A discharge conveyor 105 for discharging only the discharge is installed below the discharge turret 9. This discharge station 10
4 has a structure similar to that of the second inspection station 102 described above, and as shown in FIG. 4D, the position of the air grooves 94a, 94b, 94c, 94d of the disc valve 94 and the can lid 111 are fixed. The only difference is that a solenoid valve (not shown) for discharging is provided.

That is, the can lids 111 delivered from the third inspection station 103 are divided into good products and defective products and are discharged at predetermined places, respectively, so that the air grooves 94a, 94b, 94c of the disk valve 94 are discharged. , 94d are provided, and if the can lid 111 held by the holding portion 91 is determined to be a non-defective product, the solenoid valve supplies compressed air to the air groove 94a and is sucked by the holding portion 91. 111 is discharged to the discharge conveyor 105. Further, the inspection result of each inspection device is sent to a monitor unit (not shown). In the monitor part, if the inspection data is within the setting range, it is judged as a good product,
The non-defective product discharge signal is stored in the shift register. If it is out of the set range, it is determined to be a defective product, the defective product discharge signal is stored in the shift register, and the content of the defect is displayed on the screen.

Then, after the respective lids have been delivered to the ejection station 104, when the respective holding portions 91 have come to their respective ejection positions, the respective electromagnetic signals are activated in response to the respective ejection signals,
Distinguish good products and defective products separately. Therefore, when it is determined that the product is a non-defective product, when passing through the discharge conveyor 105, the discharge signal is received and the electromagnetic valve is activated to discharge the discharge conveyor 105. On the other hand, when it is determined that the product is defective, the discharge signal is not received on the discharge conveyor 105, and when it reaches the reject unit 106 through the discharge conveyor 105, the discharge signal is received and the solenoid valve operates. Then, the defective product is discharged.

In FIG. 5, reference numerals 5c and 8c are ring-shaped illuminators.

Next, the operation of this embodiment configured 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 separated by the supply turret 2. It is supplied to the first inspection station 101. The supplied can lid 111 is subjected to a leak inspection while being transported to the delivery position between the first inspection station 101 and the second inspection station 102, and the result of quality determination is sent to the monitor unit.

That is, the leakage inspection in the first inspection station 101 is performed by the can lid 111 held by the holder 31.
While being circulated, the lifter cam mechanism 32 raises it and 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 ejected from the can lid 111, and ultrasonic waves generated when the compressed air is ejected are detected by the microphone 35, and it is determined that the air leaks. It If no ultrasonic wave is detected, it is determined as a non-defective product. Then, the result of the quality judgment is sent to the monitor unit and stored as discharge data.

When the leakage inspection is completed, the revolving holder 3
1 is lowered by the lifter cam mechanism 32 to move down to the inspection head 3
3, the second inspection station 102 is delivered at the delivery position a.

At the time of this delivery, the can lid 111 held by the holding portion 31 of the rotary turret 30 of the first inspection station 101 is sucked by the holding portion 41 of the lower surface of the inner surface inspection turret 4 of the second inspection station 102. Then, it is directly delivered, and is sucked and held by the holding portion 41 in a predetermined state in which the inner surface faces downward. Then, when the inner surface inspection device 5 performs the inner surface inspection while the second inspection station 102 is traveling, and a defect such as a missing sealing compound or stain on the inner surface due to the adhesion of the compound is detected, it is determined to be a defective product, and If no defect is detected, it is determined as a non-defective product, and the determination result of the non-defective product is sent to the monitor unit and stored as discharge data.

When the inner surface inspection is completed, the can lid 111 suction-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 approaches from below. 3 Holding part 6 of external inspection turret 6 of inspection station 103
1 is directly sucked and handed over, is sucked and held with the outer surface facing upward, and the can lid 111 held by the holding portion 61 orbits while rotating.

That is, the holding portion 61 at the peripheral portion 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 is rotated by the action of the planetary gear 67 while rotating around and at the transfer position b. When it rises the highest and comes close to the can lid 111, the compressed air is momentarily transferred to the holding portion 41 on the inner surface inspection turret 4 side where the air groove 44b of the disc valve 44 communicates with and adsorbs the can lid 111. And the suction is released, and at the same time, the can lid 111 is sucked by communicating with the air groove 64a connected to the vacuum source of the disk valve 64 on the side of the third inspection station 103, and sucked by the holding portion 61. It is directly delivered by (see FIG. 5 (C)).

The holding portion 6 of the outer surface inspection turret 6
1 is a lifter cam mechanism 6 after receiving the can lid 111.
While being rotated by the outer surface inspection device 8, the outer surface inspection device 8 inspects for the presence or absence of the pull tab 116 of the can lid 111 and the outer surface dirt, etc. However, if no tabs and stains are detected, it is determined that the product is defective, and the result of the quality 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 thereof, and the can lid 111 in which a clip end defect is detected is determined to be a defective product. The result is sent to the monitor unit and stored as discharge data.

Then, while the third inspection station 103 makes one round, the can lid 111 after the outer surface inspection by the outer surface inspection device 8 and the outer peripheral portion inspection by the optical fiber sensor 7 is completed.
Is the third inspection station 103 and the discharge station 1
It is directly and continuously delivered at the delivery position C of 04. That is, at the transfer position C, the holding portion 61
The can lid 111 sucked and held by 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 compressed air is momentarily supplied to the holding portion 61 to release the adsorption, and 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 grooves 94a communicate with each other.
As a result, the can lid 111 has the holding portion 9 of the discharge turret 9.
Adsorbed to 1.

Then, the can lids 111 held by the holding section 91 at the discharging station 104 are successively conveyed according to the discharging data stored in advance in the monitor section based on the inspection results at the inspection stations 101, 102, 103. The coming can lid 111 is classified into a good product and a defective product. First, the good product is released from adsorption when the air groove 94b connected to the compressed air source of the disk valve 94 communicates, and the good product is processed in the next step. Discharge conveyor 10 to convey to
Passed to 5. Then, the remaining defective product is adsorbed to the holding unit 91 and further conveyed by the air groove 94c connected to the vacuum source of the disc valve 94 being communicated, and when reaching the reject unit 106 for collecting the defective product, The air groove 94d connected to the compressed air source of the disc valve 94 is communicated, the suction is released and the air is discharged.

Therefore, the transfer of the can lid 111 is performed by the first transfer from the supply turret 2 to the first inspection station 101, the second transfer from the first inspection station 101 to the second inspection station 102, and the second inspection station. The third transfer operation from 102 to the third inspection station 103, the fourth transfer operation from the third inspection station 103 to the discharge station 104, and the fifth transfer operation from the discharge station 104 to the discharge conveyor 105 are performed a total of five times. Will be seen.

Each of the first and fifth transfer operations is a conventional transfer operation, and is the can lid 111.
Is guided by a guide member, positioned and delivered, while the second, third and fourth delivery operations are characteristic delivery mechanisms of the can lid integrated inspection device 100 of this embodiment.
In this way, by directly delivering, the can lids 111 are stacked by being guided by the slope-shaped guide member as in the conventional case, and the stacked can lids are peeled one by one from the lower side and supplied to the inspection device. No longer needed
It can be directly transferred from the holder 41 to the holder 61.

In the second inspection station 102 where the inner surface is inspected, 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, and the inner surface inspection device 5 inspects from below, and then the outer surface inspection turret. Since the holding surface of the can lid 111 is transferred from the outer surface side to the inner surface side at the transfer position when it is delivered to the inner surface 6, the outer surface inspection can be continuously performed following the inner surface inspection.

As described above, according to the can lid integrated inspection apparatus 100 of the present embodiment, in the conventional can lid manufacturing line, the inspection apparatuses that are distributed and arranged for each type of inspection are concentrated at one place. In addition, since the can lid 111 can be directly delivered between the inspection stations, the time required for delivery, transportation and inspection can be significantly shortened, and the length of the production line can be greatly shortened. 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, so that even a lightweight can lid does not need any guides, It is possible to prevent the outer peripheral portion of the can lid from being deformed or scratched due to sliding contact with guides or the like. Furthermore, since can lids can be directly passed between each inspection station,
There is no need to provide can lid supply / discharge equipment, the can lid supply / discharge equipment is simplified, which is extremely advantageous for high-speed transportation, and 100% inspection can be performed in response to the speeding up of production machines.

In the above embodiment, the can lid 111
We have explained about the case of a comprehensive inspection device that gathers all inspections such as leak inspection, inner surface inspection, outer surface inspection, outer periphery inspection, tabless inspection, etc. in one place, but at least two of the inner surface inspection and the outer surface inspection of the can lid are explained. It is also possible to install in parallel with another inspection device that performs an inspection and another partial inspection such as a leakage inspection.

[0056]

As described above, according to the can lid inspecting apparatus of the present invention, the inner surface inspection and the outer surface inspection, which are dispersed in the conventional can lid manufacturing line, are gathered at one place. The inspection can be performed continuously and efficiently, and when passing from the inspection station to another inspection station, it can be directly delivered without providing guides, so high-speed transportation and high-speed inspection are possible without damaging the can lid. ,
The inspection processing capacity can be improved and the length of the can lid manufacturing line can be shortened.

Further, if each of the holding parts of the inspection station is provided with a rotation mechanism so as to rotate with the rotation of the rotating body, the entire circumference of the outer peripheral portion of the can lid can be inspected.

[Brief description of drawings]

FIG. 1 is a perspective view of an entire can lid comprehensive inspection device according to an embodiment of the present invention.

FIG. 2 is a schematic side view of the device of this example.

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

FIG. 4 is a view showing an air pipe for suction and peeling of the device.
FIG. 4 is a cross-sectional view taken along the line IV-IV and a plan view showing the port shape of the disc valve.

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

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

 3 Leakage inspection device 4 Inner surface inspection turret 5 Inner surface inspection device 6 Outer surface inspection turret 7 Optical fiber sensor for outer circumference inspection 8 Outer surface inspection device 12a Rotating shaft 13a Rotating shaft 41 Holding portion 61 Holding portion 62 Lifter cam mechanism 67 Planetary gear

Claims (2)

[Claims] 1. A can lid inspection device comprising at least two inspection stations for inspecting the inner surface and the outer surface of a can lid, wherein a plurality of first holding parts for holding the can lid are arranged at equal intervals on a peripheral portion. A first inspection station provided with a first rotating body that rotates about a vertical axis and a plurality of second holding portions that hold a can lid are provided on the same circumference at equal intervals and can move up and down. And a second inspection station having a second rotating body that rotates about a vertical axis, and the first rotating body and the second rotating body are provided between the rotating bodies. At the delivery position, the first holding portion and the second holding portion are arranged so as to partially overlap each other so as to overlap in the vertical direction, and in the overlapping region, the second holding portions are arranged to overlap each other. 1 Equipped with a vertically moving means for driving vertically toward the holding portion Can lid inspection apparatus characterized by there. 2. The second rotating body is provided with a rotation mechanism for rotating each of the plurality of second holding portions of the second rotating body along with rotation about a vertical axis. The can lid inspection device according to claim 1.