JPH04200943A - Sampling system for can manufacturing line - Google Patents

Abstract

PURPOSE:To miniaturize the carrying line by introducing the can drum treated on the plural sets of work station with the switching means on the carrying line for sampling, then changing over the switching means with the restoring means. CONSTITUTION:The host computer sends the sampling request signal to the correspondence setting means 2, the correspondence setting means 2 introduces the can drum to the carrying line for sampling while working the plural working stations, by changing over the switching means 1 with the sampling means 3 when the corresponded can drum reaches at just before the prescribed position of the carrying line for sampling. And after introducing the can drum which are treated respectively by plural work stations with the switching means 1, the can drum is introduced again on the can manufacturing line by changing over the switching means 1 with the restoring means.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sump 1 song system installed in a can manufacturing line for making food cans, etc., and particularly to a sampling system that can downsize the can manufacturing line. .

<Prior Art> In a can manufacturing line in a can manufacturing factory, can bodies are formed in the following manner.

First, a cup of a predetermined type is punched out of a thin sheet of metal using a cupping press. Then, the deep drawing device deep draws the punched cup to form a can body of a predetermined length. Thereafter, a trimmer adjusts the length of the can body and transports the can body to a cleaning device.

This trimmer device has a plurality of trimming stations each holding a can body on a rotatable rotor, each of which is equipped with a cutter that goes around the can body and cuts the openings therein. ing.

Therefore, in this trimmer device, after each trimming station holds the can body, the rotor is rotated. When these rotors rotate, the cutter moves planetarily around the can body and cuts the opening so that the can body has a predetermined length.

In this case, for example, if the fixed position of a can body at a certain trimming station is undesirably shifted, a large number of defective can bodies will be produced.

Therefore, in order to keep the quality of the can body, or in the case of this conventional example, the length of the can body, within the standard, the operator must occasionally sample the can body processed by the trimmer device to ensure that the length of the can body is within the specified range. It was necessary to check the length from time to time and monitor the occurrence of abnormalities at each trimming station.

Therefore, the length of the can body has traditionally been inspected by sampling the can body as shown below.

First, the operator stops the trimmer device and inserts the can body into each trimming station. Thereafter, the operator increments (operates the device to rotate the rotor little by little) or manually rotates the rotor to sequentially cut the can bodies held at each trimming station.

An operator would then remove these can bodies from their respective trimming stations, label them with their respective trimming station numbers, and inspect the length of the can bodies.

<Problems to be Solved by the Invention> However, such conventional sampling methods for inspecting can bodies have led to an increase in the size of the conveyance line. In other words, for example, when sampling a can body treated with a trimmer device without reducing the operating rate of the can manufacturing line, it is necessary to operate the deep drawing device, which is the front stage device, or the cleaning device, which is the second stage device. It was necessary to stop only the rimmer device.

Therefore, an accumulation zone (storage section) is created in which can bodies transported from the deep drawing device are temporarily stored just before the trimmer device, or can bodies transported from the 1/1 pumping device are temporarily stored just before the cleaning device. It was necessary to set up a transport line here. In particular, in order to stop the trimmer device during sampling, a considerable number of can bodies had to be stored in advance, and the accumulation zone had to be large.

As a result, the size of the conveyor line and, by extension, the size of the can manufacturing plant has been increased.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sampling system that can downsize a conveyance line.

<Means for Solving the Problems> As shown in FIG. 1, the present invention provides a sampling system for a can manufacturing line that is provided in a can manufacturing line composed of a plurality of devices, in which a predetermined device having a plurality of working stations is used. A switching means 1 is provided at a branching point between a can making conveyance line and a sampling conveyance line connected to the can body and leads the can body to one of the can making conveyance line and the sampling conveyance line. and correspondence setting means 2 for establishing correspondence between the plurality of working stations and the can bodies processed at each working station in response to a sampling request signal; When the can body arrives at the sampling conveyance line, the sample means 3 switches the switching means to guide the can body to the sampling conveyance line, and the switching means processes the can body at a plurality of working stations, respectively. This sampling system for a can making line is provided with a return means 4 for guiding the can body to the sampling conveyance line and then switching the switching means to guide the can body to the can making conveyance line.

<Operations and Effects> In the can manufacturing line sampling system according to the present invention, for example, a host computer sends a sampling request signal to the correspondence setting means 2.

The correspondence setting means 2 that has responded to the sampling request signal makes correspondence between these working stations and the can bodies processed at the respective working stations, while keeping the plurality of working stations in operation.

When the can body corresponding to the working station arrives at a predetermined position immediately before the Sunblink conveyance line by the correspondence setting means 2, the sample means 3 switches the switching means 1 to change the can body to the Sunblink. lead to the transport line.

Then, after the switching means J leads the can bodies to the sampling conveyance line processed at the plurality of working stations, the return means 4 returns the switching means 1
By switching the can body, the can body can be redirected to the conveyance line for can manufacturing.

In such a sampling system for a can manufacturing line, the correspondence setting means 2 makes it clear in which working station each can body was processed, so sampling can be performed without stopping the can manufacturing line. I can do it. Therefore, when sampling can bodies processed at a plurality of working stations, it is possible to carry out sampling while these working stations are in operation, and it is possible to detect an abnormality in a working station at an early stage.

In this way, since the working station can be monitored while the can making line is in operation, the quality of can bodies can be improved without reducing the operating efficiency of the can making line.

As a result, there is no need to provide an accumulation saw at each working station, so the conveyance line can be downsized.

<Example> Hereinafter, an example will be shown in which the sampling system according to the present invention is connected to a trimmer device and used when a can body processed by the trimmer device is transported to an inspection station. In addition, trimmer equipment, deep drawing equipment, washing? Since the No. 111 device is the same as that described in the above-mentioned prior art, repeated explanation will be omitted.

FIG. 2 is a schematic configuration diagram showing a sampling system according to an embodiment of the present invention.

In this figure, 11 is a trimmer device that is one of the devices installed in the can manufacturing line. This trimmer device 1
1 includes a conveyance line 12 for can making from a deep drawing device (not shown in the figure), which is also one of the devices that make up the can making line, and a cleaning device, which is also one of the devices that make up the can making line. A conveyance line 13 for can making (not shown) is connected.

In the case of this embodiment, the trimmer device is provided with three rimming stations, which are working stations. Moreover, in the middle of the conveyance line 13 for can manufacturing,
A transport line 14 for sampling to an inspection station (not shown) branches off. Furthermore, a switching rail 16 driven by an air actuator 1δ is provided at this branch portion. This switching rail 16
The can bodies transported from the can manufacturing transport line 13 are distributed to one of the sampling transport line 14 and the can manufacturing transport line 17 to the cleaning device.

A high pressure air source 18 is connected to the air actuator 15, and a solenoid valve 19 for opening and closing a compressed air passage is provided between them.

Therefore, when this electromagnetic valve 19 is closed, the piston of the air actuator 15 presses against the switching rail 16 and directs the switching rail 16 toward the conveying line 17 for can manufacturing. On the other hand, when this solenoid valve 19 is open, high pressure air pushes down the piston of the air actuator 15, causing the air actuator 1
5 switches the switching rail 16 to the sampling conveyance line 14. The opening/closing operation of the solenoid valve 19 is controlled by the slave computer 2 via the solenoid valve drive circuit 20.
1. Further, this slave computer 21 is under the management of a post computer (front q in the figure) and is controlled by the host computer.

) - The conveyance line 13 for can making near the exit of the remmer device is provided with a photo sensor 22 for detecting the passage of the can body, and the conveyance line 13 for can making near the exit of the reamer device is provided with a photo sensor 22 for detecting the passage of the can body. Also provided is a hole sensor 23 for detecting the passage of the can body. Further, the outputs of these photosensors 22 and 23 are connected to the slave computer 21.

A magnet 26 is embedded near the first trimming station 25 of the roller 24 of the trimmer device 11, and a Hall element 27 is provided near the bottom sensor 22 through which current flows when the magnetic field of the magnet 26 is detected. . Further, the output of the ball element 27 is transmitted to the slave computer 2.
1ξ are connected. Therefore, when the roller 24 rotates and the magnet 26 passes near the Hall element 27,
Hall element 27 transmits its detection signal to slave computer 21. Note that the roller 24 rotates to the left in the figure. In addition, the first trimming station 25
There is a second trimming station 28 on the left side of the figure, and a third trimming station 29 on the left side of the figure.
is provided.

Therefore, the detection signal of the Hall element 27 is generated in synchronization with the counting of the can bodies processed by the first trimming station 25 by the photosensor 22. In this manner, in the wooden embodiment, the correspondence between the trimming station and the can body is replaced by the detection signal of the Hall element 27 and the count value of the photosensor 22.

The operation of the sampling system for the can manufacturing line having the second configuration will be explained using the flowcharts shown in FIGS. 3A and 3B.

FIG. 3A is a flowchart showing the operation of the main block of the sampling system according to one embodiment of the present invention.

First, when the operator starts up the can manufacturing line control system, the host computer starts the slave computer 2.
1's CPU, memory, etc. are initialized (step Sl).

In this initialization, flag SP and counter CNT 1
The counter CNT2, flag IX, and buffer RF are also initialized. The flag SP is a flag that indicates whether or not a sample request signal has been received. The counter CNT2 is a counter provided for the photosensor 23, and indicates the number of can bodies that have passed the photosensor 22.The counter CNT2 is a counter provided for the photosensor 23, and indicates the number of can bodies that have passed the photosensor 22.
Indicates the number of can bodies that passed 3. Flag IX is a flag for checking the open/closed state of the solenoid valve, and is 1 when the solenoid valve 19 is open, and 0 when the solenoid valve 19 is closed. Buffer RF is the first trimming station 25
This is to identify can bodies that have been treated.

Next, the slave computer 21 determines whether or not it has received a sample request signal from the host computer (step S2). If the judgment result is YES, step S
Execute the zumbling subroutine in step 3. On the other hand, if the determination result in step S2 is NO, the process proceeds to step S4 without executing step S3.

Then, in step S4, the slave computer 21 determines whether the photosensor 22 has detected a can body (step S4). If the judgment result is YES, counter CN
Add 1 to T1 (step S5). On the other hand, if the determination result in step S4 is NO, the process proceeds to step S6 without executing step S5. Therefore, the photosensor 22 ζ keeps track of the total number of can bodies processed by the trimmer device 11 in operation.

Next, in step S6, the slave computer 21 determines whether the photosensor 23 has detected a can body (step S6). If the judgment result is YES, counter CNT
1 is added to 2 (step S7). On the other hand, step S
If the determination result in step 6 is N0, the process proceeds to step S8 without executing step S7. Therefore, the total number of can bodies processed by the operating trimmer device 11 is held in the photosensor 23.

Then, in step S8, the slave computer 2 determines whether the Hall element 27 has detected the passage of the magnet 26 (step S8). If the determination result is YES, the count value of the counter CNT1 is stored in the buffer RF (step S9).

On the other hand, if the determination result in step S8 is NO, step S9 is not executed and the process is repeated from step S2. Therefore, the correspondence between the can body and the trimming station is always saved in the buffer RF.

Next, when the host computer supplies a sampling request signal to the slave computer 21, the determination in step S2 becomes YES, and the sampling subroutine is executed. The sunblink subroutine of step S3 will be explained using the flowchart of FIG. 313.

First, in step S21, the slave computer 21 determines whether the photosensor 22 has detected a can body (step 521). If the judgment result is YES, counter C
Add 1 to NT 1 (step 522). On the other hand, if the determination result in step 521 is NO, step S22
The process proceeds to step S23 without executing. Therefore, even in the operation of the sampling subroutine, the can bodies processed by the trimmer device 11 are accurately counted.

Then, in step S23, the slave computer 21
determines whether the photo sensor 23 has detected the can body (
Step 523). If the judgment result is NO, step S
Return to 21. On the other hand, the determination result in step S23 is YES.
If so, the process advances to step S24 and 1 is added to the counter CNT2 (step 524). Accordingly, the photosensor 23 also counts the number of can bodies passed for the next sample request and monitors the arrival of can bodies that were processed at the first trimming station immediately prior to the sample request.

Next, the slave computer 21 determines whether the solenoid valve 19 is closed (step 525). That is,
It is determined whether the switching rail 16 is facing the conveyance line 17 for can manufacturing.

If the judgment result is YES, it is judged whether the buffer RFO value is equal to the value of the counter CNT2, that is, the first
It is determined whether the can body processed at the trimming station has been conveyed to the position of the switching rail 16 (
step 826).

If the determination result is No, the can body processed at the first trimming station has not been conveyed to the position of the switching rail 16, so step S21 to step S26
Repeat until .

On the other hand, if the determination result in step 326 is YES, the slave computer 21 issues a command to the solenoid valve drive circuit 20 to open the solenoid valve 19 (step 527), and sets flag IX to 1 to indicate that sampling is in progress. (step 828) and returns to step S21. As a result, the switching rail 16 is oriented towards the sampling conveyor line 14-, and the can bodies that have been processed by the first trimming station are guided to the sampling conveyor line 14-.

On the other hand, if the determination result in step S25 is NO, the switching rail 16 is facing the sampling conveyance line 14 and sampling has already started, so the process advances to step S29. Then, in step S29, it is determined whether the value of (counter CNT2-2) is equal to the buffer RFO value, that is, whether the can body processed at the third trimming station has been conveyed to the sampling conveyance line 14. Determine whether or not (step 529)
.

If the determination result is No, the process returns to step S21 without returning the switching rail 16, since the process has been performed at the second trimming station.

On the other hand, if the determination result in step S29 is YES, the can bodies processed at the third trimming station are transported to the sampling transport line 14 (since this has been transported, the slave computer 21 sends the solenoid valve 19 to the solenoid valve drive circuit 20). Step 530), Step S3
Go to 1. As a result, the switching rail 16 is directed towards the conveying line 17 for can manufacturing.

In step S31, the slave computer 21 resets the flag IX and buffer RF (step 531)b,
Return to main program.

As explained above, the sampling system for the can manufacturing line according to the present invention does not require providing an accumulation zone for each device, so the conveyance line can be downsized.

Furthermore, for example, when sampling a can body that has been treated with a trimmer device 11, a deep drawing device, a cleaning device, etc. in order to inspect the can body, the sampling is performed while these devices are in operation. Because it can be done
The quality of can bodies can be improved without reducing the operating efficiency of the can manufacturing line.

[Brief explanation of the drawing]

FIG. 1 is a complaint correspondence diagram of a sampling system for a can manufacturing line according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram showing a sampling system according to an embodiment of the present invention, and FIG. One Embodiment FIG. 3B is a flowchart showing the operating order of the main program of the sampling system according to the present embodiment. FIG. 3B is a flowchart showing the operating order of the sampling subroutine. 1.16...Switching means (switching rail), 2...Corresponding setting means, 3...Sample means, 4...Returning means, 14...Transportation for sampling Line, 17...
・Transportation line for can manufacturing. Patent applicant Mitsubishi Metals Co., Ltd. Agent
Patent Attorney Kiyoshi Choka - Figure 3A

Claims (1)

[Claims] In a sampling system for a can manufacturing line provided in a can manufacturing line composed of a plurality of devices, a transportation line for can manufacturing connected to a predetermined device having a plurality of working stations and a sampling system for sampling are connected to a predetermined device having a plurality of working stations. a switching means provided at a branching portion from the conveyance line for guiding the can body to one of the can manufacturing conveyance line and the sampling conveyance line; and a switching means for switching between the plurality of working stations in response to the sampling request signal. a correspondence setting means that corresponds to the can bodies processed at each working station; and when the can bodies that have been corresponded to the working station by the correspondence setting means arrive at the sampling conveyance line, the switching means is activated. sample means that switches to lead the can bodies to the sampling transport line; and after the switching means guides the can bodies processed at the plurality of working stations to the sampling transport line, the switching means switches to transport the can bodies to the sampling transport line. A sampling system for a can making line, characterized in that it is provided with a return means for guiding the barrel to a conveying line for can making.