JP6495425B1 - Liquid transportation method using flexitank - Google Patents

Abstract

An object of the present invention is to provide a method of transporting a liquid that enables the construction of an efficient transport system for the liquid, which can improve the loading rate, improve the work handling efficiency, and reduce the transport cost. A liquid transportation method in which a flexitank is mounted on a container, and a plurality of lashing belts are applied to the flexitank itself both in the longitudinal and lateral directions so as to be wound around and locked in a state close to a solid. A primary lashing process, a secondary lashing process in which a flexi tank that has been primary lashed is lashed using a metal lashing belt on the floor of the container and pressed against the floor. Become. [Selection] Figure 5

Description

  The present invention relates to a liquid transport method, and more particularly to a transport method using a flexitank.

Liquid transport in Japan is 18 liter cans and pail cans (20 liters are mainstream) for small quantities, drum cans for about 200 liters, and IBC (Intermediate Bulk Container) for about 1,000 liters. Is used in cars and containers.
When the capacity is large, transportation by tank lorries (trucks and trailers) and tank containers is the mainstream.

  Recently, in the transportation of beverages and animal and vegetable oils, transportation using flexitanks has been attracting attention. Flexitanks have begun to be used in Europe since 2000 as a container for transporting liquids using international maritime containers, and are now generally used for transporting liquids excluding dangerous goods. .

In the case of natural water or preserved water, it is filled in plastic bottles, packed in cardboard boxes, loaded on pallets, and transported by rail containers or trucks.
In the case of raw material water, an inner bag is installed in a drum container (with 200 liters) or a cubic container called maxicon (a kind of IBC: with 1,000 liters), and is filled and transported. When using a container, if it is a JR container, 23 drums and 4 maxicons can be loaded in one container.

With increasing orders for raw water, it has become necessary to take measures to improve loading efficiency, cargo handling work efficiency, and extraction efficiency.
When transporting by drum can, the loading efficiency is relatively good, but when the unit of delivery quantity per time is large, filling into the drum can, loading into the container, unloading, extraction work from the drum can at the delivery destination, etc. There is a problem that it takes a lot of labor for the cargo handling work.

  In the transportation by Maxicon, although the loading capacity is large, there is a problem that the loading rate is low because the weight per container is large, and the handling work is troublesome and the transportation cost is increased.

From the above, it was necessary to study from the viewpoints of improving the loading rate and improving the handling efficiency when building an efficient transport system for raw water.
From the viewpoint of improving the loading rate and cargo handling work efficiency, transportation by tank lorries and tank containers is also conceivable, but from the viewpoint of handling and transportation costs, transportation of raw material water, which is small and medium capacity liquid transportation, is also possible. Not suitable,

Therefore, the present inventor has paid attention to transportation using a flexitank, which has been attracting attention recently.
A flexitank is a large-capacity container made of a flexible material such as polyethylene, and is placed on the container and transported to improve the loading efficiency. However, because of its material, there is a concern whether it can withstand long-time transportation, and development of a transportation means that is safer, simpler for loading and unloading work, and reduced in transportation costs has been awaited.

  As a safe transportation means of the flexitank, it is conceivable to form and protect a rigid structure outside the flexitank (Patent Document 1). Although the technique described in Patent Document 1 seems to be effective in terms of protecting the outer shape of the flexitank, it cannot be expected to improve so much in handling, and it can take advantage of the goodness of the flexitank such as high transportation costs. Not done.

Special table 2013-501585 gazette

  The present invention solves the problems of conventional liquid transportation, and constructs an efficient transportation system for raw material water, thereby improving the loading rate, improving the handling efficiency, and reducing transportation costs. It is an object to provide a method.

  In the liquid transport method using the flexitank, the present invention can solve the above-mentioned problems in liquid transport by tying the flexitank to a state closer to a solid and tying it to a container in that state. And found the present invention.

  The present invention is characterized in that the flexitank is first secured in a state close to a solid and then secured in a container, and is based on the following technique.

(1) A liquid transport method in which a flexitank is mounted on a container, and a plurality of lashing belts are placed on the flexitank itself in both the vertical and horizontal directions to form a rounded winding state, which is tied to a state close to solid Lashing process,
A secondary lashing process to tie the flexi tanks that have been primary lashed in such a way that the lashing belt is applied to the floor of the container floor using metal fittings to prevent it from collapsing, and pressed against the floor.
A liquid transport method using a flexitank characterized by comprising:

(2) The liquid transport method using the flexitank according to (1), wherein the lashing belt used for the primary lashing has a net-like portion corresponding to a lower portion of the flexitank.

  When liquid transportation is carried out using the securing means of the present invention, it is possible to improve the loading rate, improve the handling efficiency, and also reduce the capital investment in the loading and unloading facilities. Have advantages.

FIG. 1 is a photograph showing a flexitank. FIG. 2 is a diagram showing a case without lashing curing (Comparative Example 1). FIG. 3 is a diagram showing a secured state by two lashing belts (Comparative Example 2). FIG. 4 is a diagram showing a state in which the flexitank itself is secured in the present invention. FIG. 5 is a view showing a state in which the secured flexi tank is secured to a container in the present invention. FIG. 6 is a photograph showing a state in which the lower portion of the flexitank of the lashing belt is previously sewn to form a net shape.

In the transport of liquid, since the liquid is a fluid, various forces are applied during starting, stopping, traveling on a curve, etc. during truck transportation, and shaking is generated in the container.
In the case of a tank lorry or a tank container, the container itself is solid, and in order to suppress the force of fluid shaking, a partition is provided in the container and a small room is provided to reduce the shaking of the liquid. Even in this case, since the liquid fluctuates, the braking distance is extended when the vehicle is stopped, and centrifugal force is applied to the outside when driving on a curve.

When transporting liquid (fluid), even if the flexitank is filled, the state is close to fluid rather than solid, so the flexitank is in a state of being greatly deformed by various forces during transport. When the flexitank is deformed during transportation, it is considered that an excessive load is applied to a certain part, thereby increasing the risk of container breakage.
Therefore, when a liquid is transported using a flexitank, it is necessary to make the state closer to a solid in order to transport it safely.

For this purpose, first, the flexitank itself is wound in advance in both the vertical and horizontal directions with a lashing belt in advance so that it is close to a solid state to some extent.
Next, the flexi tank, which is locked and fluidized to a certain degree of solidity, is placed on the floor surface by applying a lashing belt laterally or diagonally to the container floor using metal fittings to prevent collapse of the container. Tie up and get closer to the solid.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Comparative Examples 1 and 2]
FIG. 2 shows a state where there is no lashing curing (Comparative Example 1), and FIG. 3 shows a state where the two lashing belts are secured (Comparative Example 2).

[Example 1]
FIG. 4 shows a state where the flexi tank itself is secured with seven lashing belts, and FIG. 5 shows that the secured flexi tank is further used with four lashing belts and is secured to a container via a load collapse prevention fitting. Example 1 is shown.

  The test was carried out for the case of no lashing (Comparative Example 1), two lashing belts (Comparative Example 2), and 11 lashing belts (Example 1), and vibrations were measured. Table 1 shows the test transport pattern.

The results were analyzed for the maximum value of acceleration during each work of test transport.
The measurement conditions are as follows.
・ Setting condition: Value sampled every 0.0312 seconds and recorded the maximum value in 20 seconds ・ X axis: Left and right force against the train direction ・ Y axis: Front and rear force against the train direction ・ Z axis : Up / down force (+ is upward, ▲ is downward)
* In order to always recognize 1G of gravity, ▲ 1G is measured and recorded with respect to the Z axis in a stationary state.

  The work in the test transportation is as normal handling, when picking up (normal), during normal handling with a forklift, and when loaded with a heavy load, when loading a truck (sudden braking at 10 km / h, strong braking at 20 km / h) Acceleration was measured when the forklift was loaded (when braking suddenly at 10 km / h, when turning sharply, or when placed on the station platform). The results are shown in Tables 2-8.

  From Tables 2-8, what was tied up with 11 lashing belts has shown the lowest value in any work in the maximum value of acceleration. It can be seen that during the sudden braking of the truck, the contact of the flexi tank with the inner wall surface of the container is suppressed, and no strong load is generated on the inner wall surface.

  The value about the pressure on the inner wall of the container when turning sharply by a forklift is also low, and no problem has occurred. By performing the lashing with 11 lashing belts, the flexi tank is immediately shaken, and the possibility of continuation of the shake due to resonance is reduced.

After completion of the test, the container was opened and the contact surface between the flexitank and the lashing belt was confirmed. However, rubbing and the like were not confirmed, and there was no problem with the strength of the flexitank.
It can be said that lashing with 11 lashing belts has no problem in transportation.

[Example 2]
For the seven lashing belts that tie up the flexi tank itself, the part corresponding to the lower part of the flexi tank was previously sewn at the intersection of the lashing belts, and the entire net was used. The photograph of FIG. 6 shows the state. As a result, it was possible to achieve more stable lashing and shorter handling time.

  According to the present invention, it is possible to construct an efficient transportation system for transporting liquids, improve the loading rate and improve the cargo handling work efficiency, and have high practical value.

1 Flexi tank
2 Container floor 3 Vibrometer 4 Lashing belt
5 Load collapse prevention bracket 6 Lashing belt (for load collapse prevention bracket)

Claims (2)

This is a method for transporting liquids, which is made by mounting a flexi tank in a container, and a plurality of lashing belts are placed on the flexi tank itself in both the vertical and horizontal directions to form a wrap-around state and to be locked in a state close to a solid. Process,
A secondary lashing process to tie the flexi tanks that have been primary lashed in such a way that the lashing belt is applied to the floor of the container floor using metal fittings to prevent it from collapsing, and pressed against the floor.
A liquid transport method using a flexitank characterized by comprising:   2. The liquid transport method using a flexitank according to claim 1, wherein the lashing belt used for the primary lashing has a net-like portion corresponding to a lower portion of the flexitank.