JPH03126B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for discharging cans that have been poorly seamed by a seamer in a can production line out of the line at the seamer outlet.

BACKGROUND TECHNOLOGY As shown in FIG. 8, in a conventional can production line, the cans filled with contents by a filler 1 are fed to each pocket of a seamer by a feed conveyor 2, the can lid is tightened, and the can is sealed. The cans after seaming are transferred to the disposal conveyor 6 composed of a belt conveyor by the disposal turret 5 which rotates in synchronization with the mixing turret 4, and the cans are transported to the next process by the disposal conveyor. are doing. The canning speed is over 300 cans per minute even on a low-speed line.
The high-speed line reaches 1,300 cans per minute, and the cans transferred from the discharge turret are conveyed to the next process in close contact with each other on the conveyor.

On the other hand, in the seaming process on the can manufacturing line,
For example, slippage may occur between the lifter and the chuck, causing twisting of the can, resulting in poor sealing. Conventionally, even if such cans with poor sealing occur, it is not possible to remove the defective cans immediately after the exit of the seamer, and the cans are sent to the next processing process such as sterilization or cooling, and after the processing process, the internal pressure of the cans is reduced. These cans are detected using a hammer tester, etc., and defective cans are detected and eliminated. However, if a momentary seaming failure occurs during the seaming process, the internal pressure may be maintained properly, and in such cases, the cans with poor seaming may be treated as good cans, leading to leakage cans in the future. It is the cause. In order to avoid such problems, it is possible to detect cans with poor sealing at the seamer and eliminate them at the exit of the seamer, but in conventional production lines, the The cans transferred from the discharge turret to the discharge conveyor are transported in close contact at high speed, and when they are transferred from the discharge turret to the discharge conveyor, slipping occurs on the conveyor due to the speed difference. Even if a defective can is detected, it is not possible to accurately trace the can to its discharge position on the disposal conveyor, and it is difficult to accurately eliminate only specific defective cans. Equipment not provided.

Therefore, in the conventional production line, the only way to remove cans immediately after seaming was to manually remove them from the disposal conveyor. For example, in the past, after adjusting the seamer head, a sampling inspection of cans immediately after seaming was performed to check the seaming condition of each head, but in this case, the cans were manually sampled by looking at the seamer head number, and then the countermeasures were taken. By arranging the seams in the order of the heads, the seaming condition of each head was inspected and managed. This manual sampling inspection may be carried out by skilled workers while the line is in operation, but in order to ensure that the heads are sampled in order, the line must be temporarily stopped, which can reduce the line's operating rate. I was getting used to it. In addition, without stopping the line, the flow of empty cans to the filler can be temporarily dammed up with a can stopper, and one of the sampling cans with a partitioned space at the front and back can be used.
There is also a method in which sampling cans are taken out by forming a group and diverting the sampling cans of the group to a bypass conveyor using a seamer's disposal conveyor (Japanese Patent Publication No. 30287/1987).

Problems to be Solved by the Invention As mentioned above, in the conventional can production line, it has not been possible to eliminate cans with poor sealing from the line. Therefore, cans with poor sealing may mix in with good cans, which poses a quality control problem for canned goods. Also, when removing the sampling can,
According to the method proposed above, the line conveyor is not stopped, but the flow of empty cans to the filler must be temporarily stopped with a can stopper to create a separation, which completely solves the problem of the line's flow not being smooth. It is hard to say that the issue was resolved immediately. Furthermore, although the sampling cans that were taken out were arranged in the order of the seamer heads, it was not possible to specify which head of the seamer the cans were tied with. The present invention has been devised in view of the above-mentioned circumstances, and is capable of reliably discharging predetermined cans such as poorly tightened cans and sampling cans to the outside of the can production line without stopping the continuous flow of cans on the can production line. It is an object of the present invention to provide a can discharging device for a seamer outlet.

Means for Solving the Problems In order to solve the above-mentioned problems, the seamer exit can discharging device of the present invention uses a discharge turret that rotates in synchronization with the seaming turret to remove seamed cans from the seamer. A can discharging device at the exit of a seamer in a can production line for transferring canned goods to a disposal conveyor, which detects a predetermined can; a can discharging device installed downstream of the seamer and discharging cans out of the line; At least a fixed pitch conveying device transports cans at fixed pitch intervals to the can discharging device, and cans detected by the can detecting device are tracked to the can discharging device according to a can discharging signal, and predetermined cans are transferred to the can discharging device. This system adopts a configuration characterized in that the fuel is discharged outside the line.

Function: By transporting the sealed cans from the seamer turret to the can discharging device at regular pitch intervals,
Since cans are prevented from slipping during conveyance, it becomes easy to track the cans from the detection position to the discharge position, and since the cans are conveyed at regular intervals, the cans are reliably discharged out of the line by the discharge device.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a first embodiment of the invention. In the figure, 1 is a filler, 2 is a feed conveyor, 3 is a cap feed turret, 4 is a seaming turret, 5 is a discharge turret, and 6 is a discharge conveyor. It is similar to that.

Reference numeral 10 denotes a can detecting device for detecting a predetermined can provided at a predetermined position on the outer circumferential side of the seamer turret, and in this embodiment, a sensor is provided for detecting a can that is poorly seamed. Reference numeral 11 denotes a dog chain constituting a constant pitch conveying device, which has dogs at the same pitch as the pockets of the discharge turret 5, and a drive side sprocket 12 fixed to the rotating shaft of the discharge turret 5. , is spanned over a driven sprocket 13 provided on the side of the discharge conveyor 6, and is rotationally driven along the discharge conveyor from the discharge turret. Reference numeral 14 denotes a can ejecting device, and an appropriate ejecting means such as an air cylinder or an air jet can be employed. 15 is a reject conveyor, and 16 is a guide.

In the embodiment device configured as above,
If the can detection device detects a can with poor seaming, a rejection signal is issued and the can is tracked to the extrusion device. Tracking of cans is carried out, for example, by providing a rotary encoder that detects the rotation of the seamer and counting the number of pulses, timing the can when it reaches the ejection position, and activating the ejection device when the can reaches the ejection position. It has been done. Meanwhile, the can is
It is transferred from the seaming turret 4 to the discharge turret 5, fits into the pocket of the discharge turret 5, and is conveyed to the transfer position to the discharge turret 6, but at the same time the discharge turret 5 It also fits between the dogs of the dock chain 11 that rotates in synchronization with the dock chain 11, and from the point of transfer to the discharge conveyor 6, it engages with the dogs of the dock chain 11 and moves on the discharge conveyor 6 at equal pitches. transported by When the poorly wrapped can reaches the discharge position, the discharge device is driven according to the timing described above, and the can is discharged to the reject conveyor 15 outside the line. Note that the means for tracking the cans from the can detection device to the discharge position is not limited to the above case, but may be any suitable method such as inputting the number of pitches up to the discharge device in advance and counting the number of cans corresponding to the number of pitches. means can be adopted.

Furthermore, if the number of dogs in the dog chain, which is the constant pitch conveying device, is an integral multiple of the seamer head, then the dog corresponding to the seamer head number can be determined. This allows, for example, when pulling out a can that has been seamed at head No. 1, without using a rotary encoder or the like to shift the time lag from the seamer outlet to the discharge section as in the above embodiment. Dog No. 1 that always corresponds to 1 head
Since it can be reliably removed simply by issuing a signal to eject the material, it has the effect of eliminating the need for a shift circuit.

With this configuration, cans are prevented from slipping on the disposal conveyor when being transferred from the disposal turret to the disposal conveyor, and cans are conveyed accurately at equal pitches, making it easy to track the cans. This is done accurately and ensures that the desired can is ejected.

FIG. 3 shows a second embodiment of the present invention, in which a timing spiral 18 is employed as the fixed pitch conveying device. The timing spiral 18 has a spiral of the same pitch as the pockets 8 of the discharge turret 5, and is configured to receive cans C from the discharge turret 5 and convey them at a fixed pitch on the discharge conveyor as shown. along with the discharge conveyor. A can ejection device 19 is provided near the downstream end of the timing spiral. In the same figure, 20 is a guide provided on the opposite side of the timing spiral, and the portion facing the can discharging device is open, so that when the can discharging device is activated, the cans are transferred to the disposal conveyor. 6, it can be discharged outside the line.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, a discharge conveyor 6 also serves as a fixed pitch conveying device, and a discharge conveyor 6 is installed in each pocket 8 of the discharge turret in batches as a can discharging device. A user pad 21 is provided. When a predetermined can is transferred from the seaming turret 4 to the discharge turret 5 based on the can discharge signal, the vacuum part 21 located in the pocket 8 into which the can has been inserted is activated to adsorb the can C. While being held, it passes through the transfer point to the discharge conveyor 5, is held until the reject position, and is discharged at the reject position.

FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, the discharge turret 5 also serves as a constant pitch conveying device as in the previous embodiment, but the can discharge device 23 is replaced by the discharge turret. It is installed immediately after the can transfer position from the let 5 to the disposal conveyor 6, and is activated by the timing of the can discharge signal to transfer the cans from the pocket 8 of the discharge turret 5 to the disposal conveyor. The can immediately after is discharged to the reject conveyor 15.
As the can discharging device 16, an air blast device, a cylinder device, etc. can be adopted.

Although various embodiments of the device of the present invention have been shown above, it goes without saying that the present invention is not limited to the above embodiments, and the specific means can be variously modified.

Furthermore, in the above embodiment, a can detecting device for poorly seamed cans is placed in the seamer, and when a defective can is detected, the defective can is tracked and the can is ejected from the disposal conveyor by the can discharging device. However, the present invention is not necessarily limited to discharging poorly seamed cans, but can also be applied to sampling cans.
In the case of sampling can sampling, a can or seaming head detector is adopted as the can detection sensor, and if the seaming head is 8 heads, the can is tracked from the generation of the sampling signal, and the can discharger continuously detects the can. By repeating the operation eight times, sampling cans can be removed from all the seamer heads in sequence.

Effects The present invention is constructed as described above, and can be transported from the seamer turret to the can discharging device at fixed pitch intervals while eliminating slippage during transport. It is easier to track the cans to their location, and since the cans are transported at regular intervals, there is no need to stop the flow of cans on the can production line, and the discharge device can easily discharge the cans from the line. Predetermined cans such as sampling cans can be reliably discharged out of the line. Further, since desired cans can be discharged without stopping the line or temporarily damming the flow of cans as in the conventional method, it has remarkable effects such as increasing the operating rate of the line.

[Brief explanation of drawings]

1 to 7 show an embodiment of the seamer outlet can discharge device according to the present invention, FIG. 1 is a plan view of the first embodiment, FIG. 2 is a sectional view taken along line A-A in FIG. 1,
Fig. 3 is a plan view of the main part of the second embodiment, and Fig. 4 is a plan view of the main part of the second embodiment.
BB sectional view in the figure, FIG. 5 is a plan view of the main part of the third embodiment, FIG. 6 is a side view of the discharge conveyor part of FIG. 5, and FIG. 7 is a plan view of the main part of the fourth embodiment. FIG. 8 is a schematic plan view of a conventional can manufacturing line. 1: Filler, 2: Feed conveyor, 3: Cap feed turret, 4: Seaming turret, 5: Discharge turret, 6: Discharge conveyor, 10: Can detection device, 1
1: Dog chain, 14, 23: Can discharge device,
15: Redirect conveyor, 18: Timing spiral, 21: Butt pump.

Claims (1)

[Scope of Claims] 1. A can discharging device at the exit of a seamer in a can production line in which cans that have been seamed are transferred from a seamer to a discharge conveyor by a discharge turret that rotates in synchronization with a seaming turret. a can detecting device for detecting a predetermined can; a can discharging device disposed downstream of the seamer for discharging cans out of the line; and a fixed pitch conveying device for transporting cans at regular pitch intervals to at least the can discharging device. A can discharging device at a seamer outlet, characterized in that cans detected by the can detecting device are tracked to the can discharging device based on a can discharging signal, and predetermined cans are discharged out of the line by the discharging device. . 2. The can discharging device is provided along the discharge conveyor, and the fixed pitch conveying device is
A dog chain is provided along the discharge conveyor from the discharge turret, has a dog having a pitch equal to the pocket of the discharge turret, and rotates in synchronization with the discharge turret. A can discharging device at a seamer outlet according to claim 1. 3. The can discharging device is provided along the discharge conveyor, and the fixed pitch conveying device is provided along the discharge conveyor from the discharge turret and delivers a spiral of pitch equal to the pockets of the discharge turret. A can discharging device at a seamer outlet according to claim 1, characterized in that it is a timing spiral having a timing spiral. 4. Claims characterized in that the can discharge device is provided immediately after the can transfer position from the discharge turret to the discharge conveyor, and the fixed pitch conveyance device also serves as the discharge turret. The can discharging device at the seamer outlet according to paragraph 1. 5. The can discharging device consists of a vacuum pad provided in each pocket of a discharge turret, and the fixed pitch conveying device also serves as a discharge turret, and when the vacuum pad operates, the discharge can is transferred to the discharge conveyor. The can discharging device at the seamer outlet according to claim 1, wherein the can discharging device at the seamer outlet is configured to convey the cans beyond the transfer position and discharge them outside the line.