JPH0815900B2 - Packaging material sterilizer - Google Patents

Description

The present invention relates to a device for continuously sterilizing strip-shaped packaging material.

<Prior Art> As a device for continuously sterilizing a band-shaped packaging material,
A method in which the strip-shaped packaging material is continuously immersed in the container containing the sterilizing solution through the roller for a certain period of time, or a part of the coding roll is immersed in the container containing the sterilizing solution, and the strip-shaped packaging is rotated by the rotation of the coating roll. A method is known in which a sterilizing solution is applied to one surface of a packaging material, and then heat sterilization is performed with a dry roll and the sterilizing solution is dried.

However, in these conventional sterilizers, there is a possibility that the contact between the surface of the packaging material and the sterilizing solution may be insufficient, so it is necessary to add a surfactant to the sterilizing solution, or the transfer of the band-shaped packaging material. There are problems in terms of sterilization efficiency, sterilization effect, etc., which require measures such as slowing down the speed and lengthening the contact time.

Therefore, as a method to improve the contact between the sterilizing solution and the surface of the packaging material, a pair of plates are arranged in parallel in the vertical direction, and the sterilizing solution is overflowed and poured from the upper edge between the plates, and at the same time sterilized between the plates A sterilizer for passing a band-shaped packaging material to be passed has also been proposed.

However, in this sterilizer, a pair of plates are arranged in parallel with each other, and the top opening cross section and the bottom opening cross section have the same area, so that the sterilizing liquid poured in between the plates does not stay between the plates, Therefore, contact between the surface of the packaging material and the sterilizing solution may be insufficient, and sterilization of the surface of the packaging material may be incomplete.To avoid this, consider increasing the amount of water supplied. However, in that case, there is a problem that the pump mechanism becomes exaggerated and the adjustment thereof is difficult.

<Problems to be Solved by the Invention> As a means for avoiding such a problem, as shown in FIG. 4, a pair of plates 1a ′, 1b ′ constituting sterilizing liquid tanks 1a, 1b.
The lower end of each of the nozzles is narrower than that of the upper end, so that the sterilizing liquid supplied from the nozzle 2 can be supplied to the sterilizing liquid tanks 1a and 1b.
The plates 1a ', 1b'
There is also a proposal to adjust the opening degree of the lower end portion by lateral movement of each plate 1a ', 1b' as shown by the arrow "a". In addition, 3,4,5 are rollers for transferring the band-shaped packaging material.
However, in that case, the flow rate changed greatly with the change in the sterilizing liquid discharge opening area at the lower end of each plate, and it took time to adjust the amount of the retained liquid in each sterilizing tank 1a, 1b.

Further, in order to pass the continuous strip-shaped packaging material through the sterilizing liquid tanks 1a and 1b shown in FIG. 4, it is necessary to pass through the two sterilizing liquid tanks to form a U shape, which takes a lot of time for the work. Not only was it costly, but the workability was also poor.

Before the start of operation, the work of passing this packaging material can be performed without being affected by the sterilizing solution, but when there is an accident during operation and the machine is restarted, the sterilizing solution tank is still wet with the sterilizing solution. Since the sterilizing liquid adheres to the work, it is necessary to perform the work with caution, which further increases the difficulty.

Therefore, in the present invention, in a sterilizing apparatus for packaging materials using a sterilizing solution tank in which the sterilizing solution flows down, adjustment for always retaining a fixed amount in the sterilizing solution tank can be performed without moving the plate of the sterilizing solution tank. It is an object of the present invention to provide a sterilization device that can perform a work of passing a sterilizing liquid tank of packaging material safely and easily.

<Means for Solving the Problems> The present invention relates to a rectangular parallelepiped first tank having a lower end with a turn roll and an openable upper end, and a packaging material when the first tank is housed therein. A second tank having a sterilizing liquid dropping valve at the lower end, and a nozzle for supplying the sterilizing liquid to the gap above the upper end opening of the first tank. Below the valve at the lower end of the two tanks, a sterilizing solution tank for storing the sterilizing solution falling from the second tank, and a pipe mechanism having one end communicating with the sterilizing solution tank and the other end communicating with an upper nozzle are provided. A sterilizer for packaging materials, characterized in that

<Action> When the packaging material to be sterilized is passed through the sterilizing solution, the nozzle is removed, the first tank is raised, the packaging material is passed under the turn roll, and the first tank is lowered as it is. The packaging material is in a U-shaped state in the gap between the first tank and the second tank.

Then, by supplying the sterilizing liquid from the nozzle, storing the sterilizing liquid between the first tank and the second tank and opening the dropping valve, the sterilizing liquid falls out of the second tank, and the sterilizing liquid is discharged. Form a stream from top to bottom.

By the supply amount from the nozzle and the discharge amount from the dropping valve, the storage amount of the sterilizing liquid in the second tank can be made stable.

Then, when the packaging material is again immersed in the sterilizing liquid due to an accident or the like, the work of passing the packaging material through the first tank can be performed in the same manner as when the operation was started.

<Embodiment> FIG. 1 schematically shows a sterilizer for packaging materials according to an embodiment of the present invention.
A tank 11 and a sterilizing solution tank 12 at the bottom of the third tank 11 and a second sterilizing solution tank provided in the third tank 11
A nozzle 1 having one end communicating with the tank 13b, the third tank 11 and the sterilizing solution tank 12 and the other end located above the second tank 13b.
5, a pipe mechanism 16 provided so as to communicate with 5, and a pump mechanism provided so as to intervene in a part of the pipe mechanism 16.
17, a roller 18 for introducing the band-shaped packaging material into the second tank 13 from above, and a band-shaped packaging material 19 introduced into the second tank 13b via the roller 18 at the bottom of the second tank 13b. A first roll 13a having a turn roll 20 at the lower end that moves up and down in a U-shape and has a length that extends over almost the entire width of the second bath and has a size that forms a gap through which the packaging material 19 passes, the second bath 13a Band-shaped packaging material that has passed through tank 13b
A roller 21 for pulling 19 out from directly above the second tank 13b and sending it to the next package forming step, and a sterilizing liquid recovery tank 23 which is connected to the sterilizing liquid tank 12 through the pipes 22a and 22b. And a sterilizing liquid supply tank 25 provided so as to communicate with the recovery tank 23 via the pipe 24a and also with the sterilizing liquid tank 12 via the pipe 24b, and a liquid of the sterilizing liquid in the sterilizing liquid tank 12. In order to detect the surface, a level meter 26 connected to the sterilizing liquid tank 12 is provided.

In the sterilization chamber, as shown in FIG. 1 or 2, corresponding to the width and thickness of the band-shaped packaging material to be sterilized, the first tank 13 is formed so that a gap that allows passage thereof is formed.
a, the size of the second tank 13b is determined. This second tank 13
A drop valve 38 for flow adjustment is provided at the lower end of the.

Therefore, the sterilizing solution in the second tank 13 is used for this drop valve.
By rotating 38, it can escape to the outside at the required ratio.

Then, when immersed in the packaging material H ₂ O ₂ liquid, as shown in FIG. 3, the first tank 13a is raised and the packaging material 19 is passed between the rollers 18 and 21 and the turn roll 20, 1 tank 13a
Can be immersed in the H ₂ O ₂ solution by lowering the solution into the second tank 13b.

In this state, by supplying the H ₂ O ₂ liquid from the nozzle 15 and discharging the H ₂ O ₂ liquid from the dropping valve 38, the first tank 13
A flow of H ₂ O ₂ liquid occurs between the second tank 13b and a.

At this time, if a warming liquid having substantially the same temperature as the temperature of the H ₂ O ₂ liquid is put in the first tank 13a, the temperature of the H ₂ O ₂ liquid can be prevented from lowering during sterilization, and the sterilization effect can be further Can be increased.

In the sterilizing liquid tank 12, an overflow pipe 27 that causes an excess sterilizing liquid to flow into the sterilizing liquid collecting tank 23 through the pipe 22a when the stored sterilizing liquid exceeds a certain level,
A heater 28 for heating the sterilizing liquid to a predetermined temperature and a temperature sensor 29 for detecting the temperature of the sterilizing liquid are provided. As shown in the figure, the pipe mechanism 16 may be provided with a bypass 30 provided with a return adjusting valve 30a, and further a nozzle adjusting valve 31a may be provided to the pipe 16a communicating with each nozzle 15.

A discharge valve 32 is provided in the pipe 22b arranged between the recovery tank 23 and the sterilizing solution tank 12, and a first sterilizing solution supply valve is provided in the pipe 24a between the collecting tank 23 and the sterilizing solution supply tank 25. The second sterilization supply valve 34 is also provided in the pipe 24b between the sterilization liquid tank 12 and the sterilization liquid supply tank 25.

The sterilizing liquid supply tank 25 has a pipe 36 with a valve 36a.
Compressed air is supplied through the exhaust pipe 37, and a discharge pipe 37 having a valve 37a is connected to the bottom of the compressed air.

Then, using the above-mentioned sterilizer, a paper band-shaped packaging material is put in 35% H ₂ O ₂
The operation for sterilization will be described.

First, the 35% H ₂ O ₂ solution is supplied to the sterilizing solution recovery tank 23.
Since this recovery tank 23 is arranged above the sterilizing liquid supply tank 25, the H ₂ O ₂ liquid flows down to the sterilizing liquid supply tank 25 by opening the first sterilizing liquid supply valve 33.

When the H ₂ O ₂ liquid has been transferred to the supply tank 25, the valve 33 is closed, the valve 36a is opened, and compressed air is introduced into the supply tank 25, thus completing the operation preparation.

Next, the second sterilizing solution supply valve 34 is automatically opened by the operation start operation, and the H ₂ O ₂ solution is supplied to the sterilizing tank 12.
A level meter is attached to the sterilizing solution tank 12, and when the sterilizing solution reaches a predetermined level, the level meter detects this and the valve 34 is automatically closed to supply the H ₂ O ₂ solution. Is supposed to stop. Then, after removing the air from the pump 17 system, the pump 17 is started. The rotation of the pump 17 causes the liquid level in the sterilizing liquid tank 12 to drop, and when the liquid level falls below a predetermined lower limit level, the valve 34 automatically opens again and H ₂ O ₂
The liquid supply is restarted. Simultaneously with the start of the pump 17, the heater 28 is energized to heat the H ₂ O ₂ liquid to a predetermined temperature.

The H ₂ O ₂ liquid sent from the pump 17 is supplied to the nozzle 1 of the second tank 13b.
Injected through 5.

The strip-shaped wrapping material 19 introduced into the gap formed by the first tank 13a and the second tank 13b via the rollers 18, 20, 21 is therefore sufficient with a sufficient amount of sterilizing liquid to drop in the gap. No contact is made and the product is not conveyed to the next step in an insufficiently sterilized state.

The H ₂ O ₂ liquid flowing out from the lower part of the second tank 13b is the germicidal liquid tank 1
Automatically collected in the 2, sterilized liquid excess H from the overflow pipe 27 when the liquid level in the tank 12 increases rapidly ₂ O ₂
The liquid is designed to flow to the recovery tank 23.

Next, in the case of stopping the sterilization operation, when the stop button is pressed to stop energizing the heater 28, the discharge valve is opened at the same time, and the H ₂ O ₂ solution in the sterilizing solution tank 12 is returned to the recovery tank 23.

The concentration of the H ₂ O ₂ solution in the recovery tank 23 is checked and preparations for the next operation are made.

<Effects of the Invention> As described in detail above, according to the packaging material sterilizer of the present invention, the first tank having the turn roll at the lower end is housed in the second tank. In order to pass the sterilizing liquid through the sterilizing liquid, it is sufficient to raise the first tank and pass it through the lower surface of the turn roll, which makes the work very easy and is safe from being affected by the sterilizing liquid. You can work.

Further, if the supply amount of the sterilizing liquid from the nozzle and the discharge amount from the valve of the second tank are adjusted, it becomes easy to adjust the flow rate of the sterilizing liquid between the first tank and the second tank, and the liquid amount is kept constant. The operation for this becomes extremely easy. Therefore, the contact between the band-shaped packaging material passing through the sterilizing solution and the sterilizing solution can be made sufficient and reliable, and the sterilization efficiency of the packaging material can be improved.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a circuit configuration of a packaging material sterilizing apparatus according to the present invention, FIG. 2 is an explanatory view showing a sterilizing portion of the sterilizing apparatus shown in FIG. 1, and FIG. FIG. 4 is an explanatory view showing an operation of immersing in a sterilizing solution, and FIG. 4 is a sectional view showing an example of the sterilizing solution tank. In the figure, 1a, 1b ... Sterilizing solution tank, 2 ... Nozzle, 3,4,5 ... Roller, 11 ... Third tank, 12 ... Sterilizing solution tank, 13a ... First tank, 13b ... 2nd tank, 15 ... Nozzle, 16 ... Pipe mechanism, 17 ... Pump mechanism, 18 ... Roller, 19 ... Band-shaped packaging material, 20 ... Roller, 21 ... Roller, 22a, 22b ... Pipe, 23 …… Sterilizing liquid recovery tank, 24a, 24b …… Pipe, 25
…… Sterilizing solution supply tank, 26 …… Level meter, 27 …… Overflow pipe, 28 …… Heater, 29 …… Temperature sensor, 30
...... Bypass, 32 …… Discharge valve, 33 …… First sterilizing solution supply valve, 34 …… Second sterilizing solution supply valve, 36 …… Pipe, 37 …… Discharge pipe, 38 …… Drop valve .

Continued Front Page (72) Inventor Etsuo Shimamura 1-5-1 Taito, Taito-ku, Tokyo Minoru Torii, Examiner, Toppan Printing Co., Ltd.

Claims (1)

[Claims] 1. A rectangular parallelepiped first tank having a vertically movable upper end which is provided with a turn roll at its lower end, and a gap through which packaging material passes when the first tank is accommodated therein, and the lower end is formed. A second tank equipped with a sterilizing solution dropping valve, and a nozzle for supplying sterilizing solution to the gap above the upper end opening of the first tank and below the valve at the lower end of the second tank. A package comprising a sterilizing solution tank for storing the sterilizing solution falling from the second tank, and a pipe mechanism having one end communicating with the sterilizing solution tank and the other end communicating with an upper nozzle. Material sterilizer.