JPH0353213B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a sampling method for removing sampling cans from a can production line in order to check the sealing condition of a seamer in a can production line.

BACKGROUND ART Conventionally, in the can manufacturing process, a certain number of consecutive cans are sampled to check the seaming condition of each seaming head of the seamer. In the conventional sampling inspection, the seamer's seamer head number is checked manually, the seamers are sampled, and the seams are arranged in the order of the corresponding heads, thereby controlling the seaming condition of each head. 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 is separated, and a group of sampling cans with partitioned spaces at the front and rear are formed.
A method has also been proposed in which the first group of sampling cans is diverted to a bypass conveyor using the discharge conveyor of the seamer and taken out (Japanese Patent Publication No. 56-30287).

Problems to be Solved by the Invention The conventional automatic sampling method proposed above can sample without stopping the line conveyor, but the sampling cans that are taken out are in the seamer's order even if they are in the seaming head order. It was not possible to determine which head was used to tighten it. Therefore, even if a poorly seamed can is found among sampling cans, it cannot be determined which seaming head was used to seam the can, and all seaming heads must be adjusted. .

The present invention was devised in view of the above-mentioned circumstances, and can be done without stopping the canned food manufacturing line.
Moreover, it is an object of the present invention to provide a sampling method capable of specifying with which head a sample can taken out is sealed.

Means for Solving the Problem The present invention solves the above problems by once delimiting the flow of cans and then detecting which seaming head the first can of the next consecutive can enters. I was able to solve the problem.

That is, the sampling method of the present invention for solving the above problem is based on a seaming head detected object provided corresponding to a specific seaming head among the seaming heads of a seamer, and a seaming head detected object provided in correspondence with a specific seaming head of the seamer. A seaming head detection sensor detects a specific seaming head by detecting the seaming head, and a can detection sensor detects a can passing through the detection position of the detection sensor. By calculating the time difference between when the object is detected and when the can detection sensor detects the first can, the seaming head containing the first can is detected, and the can is removed from the can on the disposal conveyor. This system adopts a technical means characterized by sequentially discharging cans equal to the number of seaming heads.

Function Measures the time difference between when the seaming head detection sensor detects a specific seaming head (for example, No. 1 head) among the seamer's seaming heads and when the can detection sensor detects the first can. By calculating from the time difference and line speed, it is possible to specify which seaming head the first can was seamed.
Therefore, no matter which seaming head the first can enters, the seaming head can be identified, so if sampling is performed based on this,
It is possible to accurately identify which seaming head the sampling can was sealed with.

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

1 and 2 show an embodiment of a sampling device for carrying out the method of the invention.
In the figure, 1 is a feed conveyor that conveys cans C filled with contents using a filler (not shown) to a seamer, and 2 is a seaming turret. The seaming turret 2 has, in the illustrated embodiment, twelve pockets 3, each pocket 3 corresponding to a seaming head. 4 is a discharge turret, which has a pocket 5 corresponding to each pocket of the seaming turret, rotates in synchronization with the seaming turret, and transports cans from the seaming turret to a discharge conveyor 6. Transfer. The above configuration is the same as a conventionally known can manufacturing line.

In this embodiment, in the above manufacturing line, a certain seaming head is designated as the No. 1 head, and a metal piece 10, which is an object to be detected by the seaming head, is mounted on the head, and the seaming head is fixed outside the rotational trajectory. A seaming head detection sensor 11 is attached to the seaming head portion to detect the metal piece. Further, a can detection sensor 13 for detecting a can held in the seaming pocket is provided below the seaming head detection sensor. As these detection sensors, for example, eddy current type proximity sensors, reflective type optical sensors, etc. can be adopted. 15 is a dog chain of the constant pitch conveying device, which has the same pitch as the pocket of the discharge turret;
The cans are conveyed on the discharge conveyor at equal intervals and at a constant speed, making it easy to track the cans. Note that the constant pitch conveying device is not limited to the one in this embodiment, and any suitable device such as a timing spiral can be adopted, but the constant pitch conveying device is not necessarily necessary and may be omitted. Further, 16 is a can discharging device. As the can discharging device, for example, a high-speed actuator such as an air cylinder is adopted to discharge the cans individually, or the cans are temporarily stopped on the discharge conveyor with a stopper and the seaming head is simultaneously redirected for several minutes. An appropriate method can be adopted, such as a method in which the cans are moved to a conveyor, or a method in which the conveyance path of the can is switched to the reject conveyor side using a high-speed actuator.

In addition, in FIG. 2, 8 is a lifter of the seaming head.

Next, a method for extracting a sampling can using the apparatus will be explained.

By operating a button or the like, a supping start signal is sent from the control device, and a can stopper at the filler inlet (not shown) is temporarily activated to temporarily cut off the flow of cans to the seamer, and the seaming head detection sensor and can detection sensor 13
into standby mode. When the No. 1 head passes the sensor position, the metal piece 10 is detected by the seaming head detection sensor, a timing pulse is emitted, and the time difference until the first can arrives is calculated. Detects whether the first can has entered the mixing head. The detection results are recorded on a recording device and displayed on a monitor as necessary.

When the can detection sensor detects a can, a signal is emitted, and by counting the number of pulses from the rotary encoder that detects the rotation of the seamer, the can is timed to reach the ejection position, and when the can reaches the position, it is ejected. The device 16 is operated to sequentially discharge cans corresponding to the number of seaming heads from the first can to the reject conveyor.

As a result, a group of sampling cans arranged in seaming head order are automatically taken out, starting with the first interrupted can.

FIG. 3 shows another example of a sampling device for carrying out the sampling method of the present invention. In this device, the metal piece 2 which is the object to be detected by the seaming head
5 at the top of the seaming head, instead of No.
Discharge tarlet 2 corresponding to 1 head
4, and a seaming head detection sensor 26 for detecting the metal piece 25 is attached outside the rotation locus of the discharge turret. Further, a discharge tarret 24 is located below the seaming head detection sensor 26.
A can detection sensor 27 for detecting a can held in a pocket 28 is provided below the seaming head detection sensor 26 as in the previous embodiment. That is, in this embodiment, the seaming head detection sensor 26 and the can detection sensor 27 are provided in the discharge turret section, but the discharge turret 24 is provided in the seaming turret 22.
Since the pocket 28 has the same phase as the pocket 23 of the first can and rotates synchronously, the seaming head of the first can can be identified in the same manner as when it is provided in the seaming turret section. The sampling method using the device is almost the same as the above embodiment, and as is clear from the above embodiment,
Detailed explanation will be omitted.

In addition, in FIG. 3, 20 is a filler, 21
29 is a feed conveyor, 29 is a discharge conveyor, and 30 is a can discharge device.

Effects The present invention is configured as described above, and reduces the time difference between when the seaming head detection sensor detects a specific seaming head (for example, the No. 1 head) and when the can detection sensor detects the first can. With a simple configuration of calculating , it is possible to accurately identify which seaming head the first can was seamed with. Therefore, no matter which seaming head the first can enters, the seaming head can be identified, and if sampling is performed based on this, it can be determined which seaming turret the sampling can was seamed with. This has the remarkable effect of improving the work efficiency of seamer maintenance and management, since it can be accurately specified whether the seamer is a seamer or not.

[Brief explanation of drawings]

The drawings show an embodiment of the sampling device of the present invention, FIG. 1 is a schematic plan view thereof, FIG. 2 is a view taken along the line B-B in FIG. 1, and FIG. 3 is a schematic plan view of another embodiment. be. 1, 21: Feed conveyor, 2, 22: Seaming turret, 4, 24: Discharge turret, 6, 29: Discharge conveyor,
10, 26: Metal piece (seaming head detected object), 11, 26: Seaming head detection sensor, 13, 27: Can detection sensor, 16, 30:
Can ejection device.

Claims (1)

[Claims] 1 A seaming head detected object provided corresponding to a specific seaming head among the seaming heads of the seamer, and a seaming head that detects the seaming head detected object and detects the specific seaming head. A detection sensor and a can detection sensor for detecting a can passing through a detection position of the detection sensor are provided, and after the seaming head detection sensor detects the seaming head detected object, the can detection sensor detects the first can. By calculating the time difference until detection, the seaming head containing the first can is detected, and cans corresponding to the number of seaming heads are sequentially discharged from the can on the discharge conveyor. Sampling method in canning production line.