JP6072698B2 - Method for temporarily increasing the resistance against longitudinal compression of liquid and quasi-liquid transport and holding bags and bags obtained by such methods - Google Patents

Description

  The present invention relates to a method for temporarily increasing the drag force against longitudinal compression of liquid and semi-liquid transport and holding bags. The invention further relates to a bag obtained by carrying out such a method.

  Industrial transport of liquids and quasi-liquids, especially concentrated juices, for example, plays an important part of world trade. In order to transport such materials, the first consideration is to house them in a rigid container with metal tanks and plastic walls.

  However, such a rigid container has one serious drawback that even if the contents are empty, it occupies the same volume as in the full state. Transporting an empty container over a long distance and returning it to the filling point is also unreasonable from an economic and environmental viewpoint. For this reason, flexible containers are available that can be unfolded during filling, but otherwise foldable to provide minimal space on the return path to the filling point. In some cases, it is natural to be preferred.

  Such a flexible container is known, in particular, from US Pat. No. 6,057,056, which basically discloses an outer envelope formed by assembling cloth pieces into a substantially cubic bag, It contains a second envelope or liner that is filled inside with a liquid or semi-liquid material. The four sides of the outer envelope are made of double cloth and are divided to receive the reinforcing plate. The four vertical edges of the bag forming the outer envelope are sewn vertically, parallel to the vertical edges, in order to prevent the tendency of the bag to bulge outwards due to the pressure of the contents liquid when filling. It is separated from the liner by a piece of cloth.

International Publication No. 2009 / 010928A2 Brochure

  The trade of liquid and quasi-liquid materials, particularly concentrated fruit juice, is unique in that the amount of liquid actually carried in the container is rarely dependent on the maximum internal volume of the container. The top edge of the container is not filled, it is filled according to the order quantity or filled according to the amount of liquid remaining in the emptying tank. For this reason, many containers are transported in a partially filled state (with or without flexibility) or in a state where the container is not full.

  Rigid containers have many disadvantages as described above, but are flexible containers in that they can be stacked with two or three on top of them even when partially filled. Has advantages over. There are problems with stacking flexible containers, especially with partially filled ones, so far this problem has been using wooden frames and transported with flexible containers in place. It has been solved only by preparing for.

  Such an outer frame can reach 100 pounds per container (45.35 kg), so if they can be overcome, significant economic benefits will be obtained in all respects.

  The present invention is the only one that temporarily increases the longitudinal compressive strength of bags for transporting and holding liquid and quasi-liquid materials so that these bags can be stacked, thus eliminating the need to use an outer frame. It is intended as a purpose.

  For this purpose, the present invention is a method for temporarily increasing the drag against longitudinal compression of a bag for transporting and holding liquids and semi-liquids, said bag comprising a liner and a reservoir, for each bag. Select a slender and inflatable dunnage cushioning material, and the length, width and deployment dimensions of the cushioning material correspond to the length, width and inner volume of the bag reservoir inside, and the expansion into the reservoir It is a method characterized in that it is able to resist compression along the vertical axis by inflating it after introducing the cushioning material and holding the inflatable cushioning material in a vertical orientation. Another object of the present invention is a bag according to the above method, characterized in that each of the reservoirs present at the four corners of the bag includes therein a cushioning material fixed or not fixed to the bag. Is to suggest a bag.

  According to one embodiment, the bag is generally cubic and includes a reservoir at each of its four corners. The bag can accommodate a total of four reservoirs, one in each corner of the bag. According to one embodiment, four cushions are selected for each bag.

  According to one embodiment, at least one cushioning material is introduced per reservoir.

  According to one embodiment, the cushioning material can include two films, such as polyethylene, and a supply / exhaust valve, welded together.

  The following description refers to the drawing of FIG. 1 which is a partially exploded perspective view showing the use of the method according to the invention. In FIG. 1, a bag for transporting and holding liquid or quasi-liquid material, manufactured according to the teachings of US Pat. The bag 1 is made of cloth with four sides. Each side of the bag is divided into three areas by two longitudinal seams, and a reinforcing panel 2 is introduced between the respective double fabrics in the three areas. As is apparent from the figure, there are reservoirs 3 forming parallelepipeds having a triangular cross section at the four corners of the bag, and the upper ports of the four reservoirs are open and not sealed.

  The space formed by the four reservoirs can be filled with any object that allows the bags to be stacked. It should be noted that the entire interior of the bag, i.e. the central part, is occupied by a liner intended to be filled with the liquid to be transported.

  Of course, it is possible to insert an auxiliary frame such as appropriately sized wood into the reservoir, but it is more preferable to obtain the desired result without increasing the total transport weight.

  In the world of transportation, including harbors, inflatable cushion airbags (dunnage bags) may be used to stabilize internal loads such as large ISO containers, for example as large as 40 feet (12.19 m). These cushions appear to be flat pillow covers that are empty when contracted. These cushioning materials are made of two polyethylene films welded to each other over the entire circumference, and are equipped with valves for supplying and exhausting air. When filled with compressed air, these cushions become larger, especially like inflated pillows. Such inflatable cushioning materials of various sizes and shapes are available on the market.

  These pillows are very durable and the harder they are like stones, the higher the internal pressure.

  In all cases of normal use, these cushions are used to occupy the space between the two loads in the lateral direction, separating the loads from each other along a horizontal axis determined by the center of both sides of the cushioning material. Let However, on the other hand, the characteristics of these cushions were not utilized on a different axis.

  However, this idea is key to the method of the present invention.

  As shown in FIG. 1, a cushion 4 was selected whose dimensions correspond to the height and width of the reservoir 3. Moreover, although a buffer material is selected according to the position of the air supply valve 5, the valve should be near the end of the buffer material in the longitudinal direction. Four cushioning materials are selected for each of the bags, and each cushioning material is introduced into one of the four reservoirs 3 in a contracted state.

  When the liner is filled with an amount of liquid to be transported, the four cushions are inflated with compressed air.

  The expansion inside the reservoir 3 has a double effect. First, the pressure applied to the inner surface of the reservoir increases the fabric tension and helps secure the reinforcing panel 2 in place. This first effect provides immediate effective results. That is, even when the liner is only partially filled with liquid, the optimum hardness for the entire bag structure is guaranteed. However, due to the interaction between the bag structure and the cushioning material, there is a second effect, that is, the effect of securing each cushion in the position allowed by the bag structure or the orientation of the reservoir 3, in other words, in a substantially vertical position. Arise. Each cushion packed in the corset can exhibit a high resistance to vertical forces, which was previously unpredictable. This is especially true for the vertical forces generated by the weight of one or more bags that are filled and stacked on top of the original bag. Because these two effects exist and are actually interrelated, another advantage is the optimal stiffness of the bag structure and the higher resistance to longitudinal compression, which makes the damaged liner contain the contents. Even if it is lost, it is difficult to attribute the advantage of being unaffected to either one. The stability and stiffness of the bag must be better when the liner is at least partially filled with liquid, but the driving threshold that allows the bag to stack even when the liner is empty Is achieved by the method according to the invention.

  In order to avoid the need to apply this method more than once to each bag, the inflatable cushioning material is fixed in the bag reservoir so that it cannot be removed or can be removed, during expansion and contraction, for example, contraction In this case, the cushioning material can be maintained in the reservoir by a load strap or a holding fitting that prevents the bag from coming out of the reservoir.

  The method according to the invention has advantages firstly during the movement from the filling site to the destination and secondly during the return movement.

  During the first movement, the weight of the cushioning material is insignificant so that the filled bags can be stacked in sequence without increasing the weight, and one or more other loads can be filled. Of course, it is possible to place it on the bag.

  During the second movement, the volume of the deflated bag is relatively small and there is little weight as described above.

  Finally, there is also little cost for the type of bag selected, it does not significantly increase shipping costs, and wise use in accordance with the present invention can significantly reduce the weight and volume to carry.

Claims (6)

  A method for temporarily increasing the resistance against longitudinal compression of a bag for transporting and holding liquid and quasi-liquid, wherein said bag (1) comprises a liner and a reservoir (3), and is elongated with respect to each bag. An inflatable dunnage cushioning material (4) is selected, and the length, width and deployment dimensions of the cushioning material correspond to the inner length, width and inner volume of the reservoir of the bag, A method characterized in that after the inflatable cushioning material is introduced, it is inflated, and the inflatable cushioning material is held in a vertical direction so that it can resist compression along the vertical axis.   The method of claim 1, wherein the cushioning material is expanded in the reservoir after introducing an amount of liquid to be transported into the liner.   The method according to claim 1 or 2, wherein the bag is substantially cubic and has four reservoirs in the corners for inserting at least one cushioning material (4). A bag (1) for transporting and holding liquids and semi-liquids,
Has a liner and the reservoir (3), each reservoir, possess optionally secured to the bag, the inflatable interior cushioning material (4),
The inflatable internal cushioning material is elongated, and its length, width and deployment dimensions correspond to the length, width and internal volume inside the reservoir of the bag,
It said inflatable interior cushioning material of you, characterized in that the resistance to compression along the longitudinal axis is held in a vertical orientation on the reservoir bag.   The bag according to claim 4, wherein the bag is substantially cubic and comprises four reservoirs, each reservoir being at each corner of the bag.   The bag according to claim 4 or 5, wherein the cushioning material (4) includes two polyethylene films and an air supply / exhaust valve (5) welded together.

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