JPS6020614Y2 - air buffer bag - Google Patents

Description

[Detailed description of the invention] The present invention relates to an air cushioning bag having a generally rectangular shape that prevents damage to the transported items during transportation, and particularly for the purpose of reusing the air cushioning bag after use. The bag is characterized in that it has a structure that allows residual air in the bag to be completely exhausted relatively quickly and flattened by an extremely simple operation.

In recent years, rapid progress has been made in transportation methods for transported goods, but vibrations, tilting, and
Accidents occur in which the transported objects are damaged due to vibrations, shocks, etc., causing the cargo to collapse, being strongly pressed against the casing of the loading platform, or colliding with the casing of the loading platform.

As a means to prevent damage to the transported objects during transportation, a flat material such as plastic acid as shown in FIG. A method of inserting an inflated bag by injecting air through the check valve 1 into an air buffer bag, usually called an air pack, which is equipped with a check valve 1 and has an air leak prevention part formed with a plastic film. is being implemented.

These air buffer bags have excellent cushioning properties because they are filled with air, and their weight hardly increases.Before air is injected into the bag, they are in a flat state, making it easier to transport items and trucks and freight cars. By inserting the bag between the bag and the casing of the loading platform of a ship or ship, and then injecting air into the bag, it expands into a shape that fully fits the complex shape of the target area and functions as a filler. Yes, and if you insert a pipe etc. into the check valve to prevent it from working as a check valve and let the air out, you can use it as many times as you want until the air buffer bag is damaged. In addition, air buffer bags have the advantage of being extremely easy to carry, as they become a flat bag with a generally rectangular shape when the air that is filled in the bag is expelled. There is.

These air buffer bags allow the air filled in the bag to be completely discharged in a relatively short time with an extremely simple operation and without damage after the transported item has been transported to the destination. It is necessary to be able to get into the state.

However, we have experienced the trouble of discharging the air inside the air column or swim bladder, and the difficulty of completely discharging it, and the same is true for conventional air buffer bags. Buffer bags are required to be strong and have great pressure resistance, so the diameter of the check valve that serves as the air inlet and outlet is usually limited to a medium diameter, so compressed air must be used when filling with air. There is relatively no problem since it is used, but the small size of the valve port poses a problem when discharging air.

In particular, in the present invention, by simply stacking air buffer bags that have only been partially vented, the remaining air inside the bags is removed using only the weight of the bags, without using any means such as applying external pressure or suctioning with a vacuum device. It is extremely difficult to eliminate almost completely.

The first method to forcibly discharge the air inside the bag is a negative pressure method connected to a vacuum device, but unlike pressurization, negative pressure requires a complicated device and increases equipment costs. However, it also has the disadvantage of being complicated to operate.

In addition, as a second method, when trying to pressurize the bag from the outside to expel the air inside the bag, there is a drawback that the effect varies greatly depending on the pressurized area.

That is, if the pressurizing area is small, the air filled in the bag is only partially exhausted, and it is difficult to completely exhaust the air filled in the bag.

Therefore, the larger the pressurized area is, the better the exhaust efficiency is, and it is ideal to pressurize the entire surface, but this has the disadvantage that the pressurizing device becomes large and inconvenient to handle.

Therefore, in the present invention, we have adopted a method of simply stacking air buffer bags to allow the air inside the bags to be naturally exhausted by the weight of the bags, and devised an advantageous structure for the air buffer bags in this case.

That is, the present invention provides a generally rectangular air buffer bag equipped with a flat check valve and having an air leakage prevention section formed of a plastic film. At least two or more check valves are installed, and the gap between the valve openings of at least one set of the two or more check valves is 85% of the length of the diagonal line in the numerical table.
The present invention provides an air buffer bag characterized by having the above-described spacing.

In the present invention, as described above, at least two check valves are installed, each communicating with the air leakage prevention part formed of a plastic film.
It is essential that the spacing between the valve openings of at least one set of these two or more check valves is at least 85% of the diagonal length of the bag, and with this structure, the bag Almost all the air inside can be easily and relatively quickly evacuated.

Calculating this essential requirement for rectangular air buffer bags of various size ratios, if we consider a rectangle with one side length 1 and the other side length L, the length of the diagonal is /1 + L
2, and 85% of that is 0.85j1+L2, so 0.8! If M'l+L2<L (L>1), it should be possible to mount at least one set of check valves on the same long side.

Therefore, as is clear from the above calculations, if the ratio of the short side to the long side of a rectangle is 2 or more, it is possible to install two check valves at predetermined intervals on the same long side, not necessarily at diagonal corners. Even so, the intended purpose can be achieved.

The reasons for limiting the position of the valve opening of the check valve as described above are as follows.
This can be easily understood from the difference in the state of air discharge from the air buffer bag when a valve port is provided as shown in Figure 4.

That is, FIG. 1 is a plan view of an example of a conventional product in which a check valve 1 is attached to one corner of the short side, and a pipe is inserted into the check valve 1 to drain the air inside the air buffer bag. If an attempt is made to discharge the air, even after the air in the portion 3 near the check valve 1 has been discharged, there will still be a residual portion 4 of air shown by diagonal lines.

On the other hand, in Fig. 2, check valves 1 are installed at both corners on the same short side.
1' is installed, and if you insert a pipe into the check valves 1, 1' to discharge the air inside the air buffer bag, you will need to remove the short tube where the check valves 1, 1' are located. Check valve near the edge 1
, 1', even if the air in the portion 3 close to 1' can be discharged, there will still be a residual portion 4 of air shown by diagonal lines.

Fig. 3 is a plan view of the case where one check valve 1, 1' is installed near the long side of one of the opposing short sides. If you insert a pipe to discharge the air inside the air buffer bag, check valves 1 and 1'
Even if the air in the portion 3 near the check valves 1, 1' on the long side nearer to the side where the check valves 1 and 1' exist can be discharged, there will still be a residual portion 4 of air shown by diagonal lines.

On the other hand, FIG. 4 corresponds to an embodiment of the air buffer bag according to the present invention, in which check valves 1 and 1' are provided at positions having an interval of 85% or more of the length of the diagonal line 2 shown by the chain line. This is a plan view of the bag, showing that almost all the air inside the bag was exhausted and the dead spot where it remained was eliminated.

FIG. 5 is a plan view of another embodiment of the air buffer bag according to the present invention, in which the long side of the rectangle is more than twice as long as the short side, and in this case, two bags are placed on the same long side. Even if check valves 1, 1' are provided, the desired purpose can be achieved.

The point that requires further consideration regarding the above results is that if the exhaust is performed locally, the opposing inner surfaces of the bag will come into close contact with each other, hindering the circulation and movement of air.
This fact is a major cause of obstruction to air removal, but it is necessary to install at least two check valves that communicate with the air leakage prevention part of the bag, and at least one set of these check valves has a length of the diagonal line. By providing a spacing of at least 85% of the height, air removal, which is a major cause of snow prevention, can be eliminated.

In addition, the air buffer bag according to the present invention has an air leak prevention part formed of a plastic film, but it also has various features such as static electricity prevention, constant shape, reinforcement, especially tear strength reinforcement, surface printability, loadability, etc. In order to improve the air leakage prevention part, the outer surface of the air leakage prevention part is made of paper, paper processed products, synthetic resin stretched flat yarn woven fabric, synthetic resin stretched split fiber nonwoven fabric, coarse cloth made of flat yarn, or cross laminated film. Preferably, it is protected by a protective layer consisting of a laminate with paper.

[Brief explanation of the drawing]

Figure 1 is a plan view of an example of an air buffer bag equipped with only one conventional check valve, and Figures 2 and 3 are views of an air buffer bag equipped with two check valves other than the present invention. FIG. 4 is a plan view of one embodiment of the air buffer bag according to the present invention, and FIG. 5 is a plan view showing another embodiment of the air buffer bag according to the present invention. 1.1'...Check valve, 2...Diagonal line,
3... Part near the check valve, 4... Part where air remains.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A generally rectangular air buffer bag equipped with a flat check valve and having an air leakage prevention section formed of a plastic film, each of which communicates with the air leakage prevention section. At least two check valves are installed, and the gap between the valve openings of at least one set of the two or more check valves is 85% or more of the diagonal length of the bag. An air buffer bag characterized by: 2. The air buffer bag according to claim 1, wherein the outer surface of the air leakage prevention part is covered and protected by a protective layer.