JPH05193622A - Inert gas encapsulating type packing method - Google Patents

Abstract

PURPOSE:To save an inert gas drastically by a method wherein particularly after vacuumizing the inside of a container which contains a storage bag, an inert gas is directly introduced in the storage bag, concerning an inert gas encapsulating type packing method which is used as a preservation means for clothes or food, etc. CONSTITUTION:An approximate cube shaped plastic storage bag 5, which has an opening on one end is contained in a container 1, and at the same time, the leading end of a pipe for inert gas injection 8 is being inserted in the storage bag 5 through one side of the opening. Then, after vacuumizing the inside of the container 1, the opening of the storage bag 5 is sealed 9a by heat-sealing, and an inert gas is injected in the storage bag 5 through the pipe 8. Then, at a corner of the storage bag 5, the operation of sealing 9b is performed by a diagonal heat-seal so as to shut off the leading end opening of the pipe 8 from the inside of the storage bag 5, as the constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inert gas-filled pack method used as a storage means for clothes, foods and the like.

[0002]

2. Description of the Related Art Conventionally, when clothes, foods, etc. after cleaning are sealed together with an inert gas such as nitrogen gas in a storage bag made of a plastic film such as polyethylene for the prevention of mold and deterioration, first of all, a storage bag is used. Is put in a container with a closed lid, and the container is connected to a rotary pump to make a reduced pressure state. At that time, since the mouth of the storage bag is left open, the inside of the storage bag is also in a reduced pressure state. Then, when nitrogen gas is introduced into the container, the nitrogen gas is also introduced into the storage bag. And
Further, when the opening of the storage bag is closed by heat sealing, the clothes or food are sealed in the storage bag together with the nitrogen gas. In this way, air is put into the container and the sealing lid is opened. Storage bag is taken out.

[0003]

By the way, in the conventional packing means as described above, since the nitrogen gas is introduced into the container for decompressing the container for accommodating the storage bag, the bag is actually put inside the storage bag. There is a problem that only the necessary nitrogen gas is wasted.

The present invention is intended to solve such problems, and after depressurizing the container for storing the storage bag,
An object of the present invention is to provide an inert gas-filled pack method in which the inert gas is greatly reduced by directly introducing the inert gas into the storage bag.

[0005]

In order to achieve the above-mentioned object, the method of packing an inert gas-filled type according to the present invention stores a substantially rectangular plastic storage bag having an opening at one end inside a container. , The end of the pipe for injecting an inert gas is inserted into the storage bag through one side of the opening, and after the inside of the container is depressurized, the opening of the storage bag is heat-sealed. After sealing, injecting an inert gas into the inside of the storage bag through the pipe, and then by heat-sealing obliquely at one corner of the storage bag so as to block the tip opening of the pipe from the inside of the storage bag. It is characterized by performing a sealing operation.

[0006]

According to the above-described inert gas filling type packing method of the present invention, a substantially rectangular storage bag for accommodating clothes and the like is put in a container, the inside of the container is decompressed, and the container is kept free of nitrogen gas and the like. Instead of introducing the active gas, the inert gas is directly introduced into the storage bag.

That is, since the tip of the pipe for injecting the inert gas is inserted through one side of the opening of the storage bag in the container, the opening of the storage bag is opened after the depressurization of the container. It is closed by heat sealing except for the tip portion, and then an inert gas is directly injected into the storage bag through the pipe.

After the inert gas is injected, a sealing operation is performed by a heat seal inclined at one corner of the storage bag so as to shield the tip opening of the pipe from the inside of the storage bag. Clothes and other items are sealed together with the inert gas, and even if there is some leakage of the inert gas into the container, the inert gas is introduced into the storage bag via the container as before. Compared with the means, the consumption of the inert gas will be significantly reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of an inert gas-filled packing method according to an embodiment of the present invention with reference to the drawings.
FIG. 3 is a schematic diagram schematically showing the configuration of an apparatus for carrying out the method.

As shown in FIG. 1, a reservoir tank 3 is connected to a container 1 to be depressurized via a first valve A.

Further, an intake port 2a of the rotary pump 2 is connected to the reservoir tank 3 via a second valve B.

The container 1 is provided with an openable / closable sealing lid 1a at its entrance / exit. Inside the container 1, a storage bag 5 made of a plastic film such as polyethylene mounted on a tray or a carriage 4 is provided inside. It is adapted to be sent in or pulled out while containing the stored material 6 such as or food.

Inside the container 1, two sets of movable heat seals 7 for closing the opening 5a at one end of the storage bag 5,
7'is attached.

Further, a pipe 8 for injecting nitrogen gas as an inert gas into the storage bag 5 is inserted in the container 1, and a nitrogen gas supply source is provided in the pipe 8 via a valve (not shown). It is connected.

The inert gas-filled packing method of the present invention using the above-mentioned apparatus is carried out as follows. First, the first valve A is closed and the second valve B is opened to evacuate the reservoir tank 3 by the rotary pump 2.

On the other hand, the storage bag 5 is accommodated in the container 1 by opening and closing the sealing lid 1a. At that time, the storage bag 5 is set so that the tip of the pipe 8 is inserted through one side of the opening 5a. (See FIG. 2) After such an operation is performed, the second valve B is closed and the first valve A is opened to communicate the reservoir tank 3 with the container 1 while the rotary pump 2 is kept in the operating state. An operation is performed, whereby the air in the container 1 is sucked into the reservoir tank 3 and the inside of the container 1 is depressurized.

Each of the above operations can be sequentially and accurately performed by the timer mechanism via the control system, and can be automated.

When the inside of the container 1 is in the depressurized state as described above, the inside of the storage bag 5 with the opening 5a left open is also in the depressurized state. As shown in the seal portion 9a, an operation of closing the opening 5a of the storage bag 5 is performed, and at this time, the outer peripheral surface of the distal end portion of the pipe 8 is clamped by the plastic film forming the storage bag 5.

Then, nitrogen gas is instantaneously injected into the storage bag 5 through the pipe 8, and immediately after that, the tip opening of the pipe 8 is cut off from the inside of the storage bag 5.
By the heat seal 7'which is inclined at one corner of the rectangular storage bag 5, a sealing operation is performed as shown by the seal portion 9b in FIG.

The storage bag 5 in which the stored material 6 is sealed together with the nitrogen gas in this manner is pulled out from the container 1 by the pulling means (not shown) with the opening and closing of the sealing lid 1a.
At this time, the tip portion of the pipe 8 simply comes into close contact with the storage bag 5 without being welded, so that the pipe 8 can easily come out of the storage bag 5.

After depressurizing the container 1 by the reservoir tank 2,
The first valve A is closed and the second valve B is opened, so that the rotary pump 2 is communicated with the reservoir tank 3 again in its operating state, and an operation of bringing the tank 3 into a vacuum state is performed. . In this way, the above-mentioned operations are sequentially repeated, and the storage bag 5 that is successively fed into the container 1 is subjected to the reduced pressure sealing process.

It is desirable that the volume of the reservoir tank 3 be sufficiently larger than the volume of the container 1. For example, if the volume of the reservoir tank 3 is set to 10 times the volume of the container 1, the container 1 can be communicated with each other. The pressure inside is reduced to about 0.1 atm (strictly 1/11 atm) within 1 to 2 seconds, and by such a decompression means, the decompression inside the storage bag 5 for storing food, clothes after cleaning, etc. Can be done easily in a short time.

On the other hand, in the conventional decompression system without the reservoir tank 3, since the operation of decompressing the inside of the container 1 is performed only by the rotary pump 2, the working time becomes long and the working efficiency is lowered. become. This is because the rotary pump 2 generally has a low efficiency and is not good at putting a container in an atmospheric pressure state into a vacuum state.

The first and second valves A and B are
It is possible to make a switching valve having an integral structure without being separated from each other.

Since the rotary pump 2 does not have a sufficient pumping speed for a while after starting, rapid pumping is difficult, but
In this embodiment, the rotary pump 2 is always in operation, and while the storage bag 5 is being carried into or taken out of the container 1, the heat seal 7, 7 ′ is used to open the opening 5 a of the storage bag 5. Since the rotary pump 2 works to inhale air from the reservoir tank 3 while closing the
There is an advantage that decompression operation can be performed very efficiently.

Further, in this embodiment, the pipe 8 allows
Since nitrogen gas is directly introduced into the storage bag 5 after depressurization,
Compared to the case where nitrogen gas is introduced into the container 1 and nitrogen gas is introduced into the storage bag 5 via the container 1 as in the conventional case, the consumption of the inert gas is significantly reduced. Become.

Further, the heat-sealing of the storage bag 5 is performed in two stages, and finally the end opening of the inert gas injection pipe 8 is obliquely formed in one corner of the rectangular storage bag 5 by heat sealing. Since it is properly shut off from the inside, there is an advantage that the inert gas-filled pack work can be performed efficiently and appropriately.

[0028]

As described above in detail, according to the inert gas filling type packing method of the present invention, the following effects and advantages can be obtained. (1) Since the inert gas injection pipe is inserted through one side of the opening of the storage bag in the container, the inert gas can be directly introduced into the storage bag after decompression, which is the same as in the conventional case. As compared with the case where the inert gas is introduced into the storage bag via the inside of the container, the consumption of the inert gas can be significantly reduced. (2) The heat-sealing of the storage bag is performed in two stages, and the opening of the inert gas injection pipe is finally cut off from the inside of the storage bag by heat-sealing diagonally in one corner of the rectangular storage bag. Therefore, there is an advantage that the inert gas-filled pack work can be performed efficiently and appropriately.

[Brief description of drawings]

FIG. 1 is a schematic view of an apparatus used in an inert gas-filled pack method according to an embodiment of the present invention.

FIG. 2 is a plan view showing a first heat sealing step.

FIG. 3 is a plan view showing a second heat sealing step.

[Explanation of symbols]

 1 Container 1a Sealing Lid 2 Rotary Pump 2a Inlet 3 Reservoir Tank 4 Tray or Cart 5 Storage Bag 5a Opening 6 Clothes or Foods 7,7 'Heat Seal 8 Inert Gas Injection Pipe 9a, 9b Seal Part A 1st Valve B Second valve

Claims (1)

[Claims] 1. A substantially rectangular plastic storage bag having an opening at one end is housed inside a container, and the tip of an inert gas injection pipe is inserted into the storage bag through one side of the opening. Then, after the inside of the container is depressurized, the opening of the storage bag is sealed by heat sealing, an inert gas is injected into the storage bag through the pipe, and then the pipe A method for packing an inert gas-filled type, characterized in that a sealing operation is performed by heat-sealing obliquely in one corner of the storage bag so as to shield the tip opening from the inside of the storage bag.