JP2006290358A - Air dunnage bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air dunnage bag at a low price which has a simple structure but is capable of protecting a cargo stably with a flat and wide contact surface in long time transportation under a rugged environment. <P>SOLUTION: The air dunnage bag is integrally composed of an inner bag 2, and an outer bag 3. The inner bag 2 is formed in such a way that a side edge part 2-1, which is made by superposing two square synthetic resin films to form the edge part of the whole outer frame, is thermally welded so as to form at least one air injection hole being formed on one end of the side edge part 2-1, and that edges 2-2 which are formed by vertically partitioning the inner bag 2 at a plurality of middle points in the side edge 2-1, are each so thermally welded as to form at least one or more air channels 2-3 to provide a plurality of air compartments communicating with each other. The outer bag 3 is formed of a separate cylindrical synthetic resin sheet covering the exterior of the inner bag 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention stably packs a package stored in a transport container such as a container when the package to be loaded is stored in a transport container such as a container and loaded on a freight car, ship, truck, etc. Air cushioning material that can be fixed inside and absorb external forces such as impacts to effectively prevent the load from collapsing during transportation and damage caused by it, especially the contact surface with the cargo is flat and wide contact The present invention relates to a universal type air dunnage back that can be suitably used when transporting in a harsh environment over a long period of time by being pressed with a surface.

  Conventionally, in order to transport medical equipment, various precision machine parts, semiconductor products, etc. (hereinafter sometimes simply referred to as “products, etc.”) to mass destination products in a healthy state A package (hereinafter collectively referred to as a package) in which a packaged body composed of the product or part is stored in a packaging container such as a cardboard box or a wooden box (hereinafter simply referred to as a “packing container”). After that, the cargo is stored in a transport container such as a container and loaded on an airplane, ship, freight car, truck, etc. As cushioning materials and packing materials used for packing work stored in containers, foamed polystyrene molded products that are usually molded according to the shape of individual products are used, but packing materials or buffers for a wide range of applications are used. Still as a material Te newspaper or cloth, chip-like expanded polystyrene, such as bubble film, are useful in order to be used regardless of the shape of such product to be packed. However, since the above-mentioned foamed polystyrene molded article is used as a dedicated cushioning material corresponding to each product, it cannot be used for any other purpose besides disposal after use, and the above-mentioned chip-like foamed polystyrene and bubble are excellent in versatility. Even in the case of sheets (air caps), newspapers, cloths, etc., when they are finally incinerated as waste, they become a considerable amount, and from the viewpoint of global environmental protection and energy saving, including the generation of harmful combustion gases. Is a problem that cannot be easily overlooked.

Therefore, recently, a bag-like air cushioning material (see, for example, patent literature) in which the outer edges of two synthetic resin films are heat-sealed into a bag shape and an air inlet having a special check valve function is provided at one end thereof. 1), or an air mat-like cushioning material (see, for example, Patent Document 2) comprising a plurality of small air chambers provided with a linear or dotted welding wire inside the bag-like cushioning material. Already widely used as a bag-like air cushioning material made of a thin film synthetic resin in which an air pressure of cm ^{2 to 5} Kpa / cm ² is enclosed. This bag-like air cushioning material has excellent properties as a protective packaging for various parts and products while maintaining versatility as a packaging material, as a gap filling material for general goods, and as a cushioning material for materials. It is easy to fold, is folded into a sheet when not in use, has a compact storage space, is made of the same material, can be recycled, and does not generate harmful gases when incinerated. In addition, it is easy to dispose of and excellent in convenience.

  However, the synthetic resin bag-like air cushioning material has excellent characteristics as a substitute for a chip-like foamed polystyrene or bubble sheet corresponding to a packaged body made of various types of parts and products having various shapes, When storing precision instruments that are vulnerable to impacts stably in packing containers, there is some concern about their reliability, so a larger amount of bag-like air cushioning material will be used to wipe them away. Therefore, the packaging container is increased in size, and the bag-like air cushioning material is desirably individually compact in order to compensate for various gaps between the packaged body and the packaging container. Since the air to be enclosed is required to be at a relatively low pressure, the air pressure of the bag-like air cushioning material is reduced during long-time transportation and storage in a region where the temperature changes drastically, for example, in a cold region. Or, in the high temperature zone reversed ruptured pouch air cushioning material, a new problem arose such or no longer functions as a buffer material. Therefore, many air cushioning materials have been proposed that wrap the packaged object such as precision parts with an air cushioning material and intervene between the packaging container and exhibit a stable cushioning function. A synthetic resin air cushioning material having a plurality of elongated air chambers extending in the lateral direction, and finally folding the elongated air chamber into a cylindrical shape and bending its partially welded portion, thereby ultimately to be packed An air cushioning material (see, for example, Patent Document 3) covering the whole with the air chamber and an air chamber called a vesicle continuous in the left-right direction are provided, and when the air is filled, an intermediate portion and both end portions of the air chamber A wrapping type air cushioning material (see, for example, Patent Document 4) in which a step is formed at the boundary with the portion is proposed. Package Guests crowded wrapped while supporting the peripheral, air cushioning material system for clamping the left and right have been put to practical use have been developed in some cases.

  Packaged items such as individual products protected by various improved cushioning materials as described above are stably stored in packing containers such as cardboard boxes and wooden boxes. A large cargo having a weight of kilograms is formed, and then, for example, a plurality of the cargos are loaded into a transport container such as a container, and are connected to a ship, an airplane, a freight car, a truck, etc. via a rope, a chain, or a dedicated rope. It is fixed and loaded with high reliability secured and transported to each destination. By the way, when the above cargo is stably stored and not fixed in a container or the like (hereinafter simply referred to as a “container”) serving as a transport container, the cargo itself collapses in the container, Due to this, there is a concern that the cushioning material in the packing container is damaged, and as a result, the product or the like that is the packaged body is damaged.

Therefore, as a cushioning material for protecting cargo from external forces such as impact, it is an inner bag that can be inflated by air pressure. A so-called air dunnage back (see, for example, Patent Documents 5 to 7) having a double structure has been developed by covering the outer side of the inner bag with an outer bag having higher rigidity, and has already been widely used.
Japanese Examined Patent Publication No. 7-117171 (pages 1 to 3, FIG. 2) Japanese Utility Model Publication No. 6-37149 (pages 1 to 5, FIG. 4) JP 2003-137352 A (pages 1-8, FIGS. 1-15) JP 2003-63567 A (pages 1-7, FIGS. 1-7) Japanese Patent Laid-Open No. 11-124179 (pages 1 to 11 and FIGS. 1 to 14) Japanese Patent Laid-Open No. 11-255269 (pages 1 to 9, FIGS. 1 to 5) Japanese Patent Laid-Open No. 11-268771 (pages 1-7, FIGS. 1-12)

  Normally, when various products are transported for a long time by ship, airplane, freight car, truck, etc., they are packed in a packaging container such as a cardboard box or wooden box as described above, and then transported by a container or the like. Although it is transported in the state of being stored in a container, cargo collapse in a covered transport container such as a container, for example, is not detected in appearance, and therefore causes a larger accident due to a balance disorder due to cargo collapse. The air cushioning material etc. in the packaging container may be damaged by leaving it for a long time as it is, and as a result, it may cause fatal damage to the cargo such as products. Sufficient consideration is required for storing the packing container in the container, and in particular, its reliability is regarded as important. Therefore, not only the above-mentioned improvements relating to the air cushioning material for packing used when storing the product to be packed in a packing container represented by a cardboard box or a wooden box, but for preventing collapse of the load in the container. Various improvements have been made to the air cushioning material, that is, the air dunnage back. However, the air dunnage back usually has a double structure consisting of an outer bag and an inner bag. Use bleached kraft paper, PE bag for inner bag, or unbleached kraft paper for outer bag in triple, and use inner bag as PE bag or apply PA / PE / PA laminate The air dunnage back formed in a pillow shape is used in any case.

  For example, when packing and transporting products or motorcycles packed in cardboard boxes with this pillow-shaped air dunnage back, the air dunnage back becomes cylindrical due to the stress of air when air is injected, and in the center Stress may concentrate and become convex. There is a concern that the air dunnage bag is partially deformed into a convex shape, so that air pressure is concentrated on the central portion of the corrugated cardboard box, which is a packaging container, and damages the cargo such as the interior products. Therefore, a buffer plate made of reinforced cardboard or the like is further interposed between adjacent cardboard boxes or between the inner wall of the container and the cardboard box, thereby preventing damage to the cargo due to the deformed air dunnage back. Although considered, the reinforced corrugated cardboard used as a buffer plate is expensive, and so-called Schwaling cost including it is soaring, which is a problem that is desired to be solved immediately. In addition, although used packaging containers are attracting worldwide attention as a waste problem, the air dunnage bag, which is composed of a combination of various types of materials including kraft paper that is used in layers, is recycled and An air dunnage bag made of a single material was not desirable from the viewpoint of incineration, and there was a strong demand in the field.

  On the other hand, the conventional air cushioning material is formed in advance with an air chamber corresponding to the shape of the packaged body, and after the air is injected, the packaged body is installed inside, and then the air cushioning material is installed in the packaging container together. By this, it has the structure which interposes between a packing container inner wall and a to-be-packaged body, and protects a to-be-packaged body. It is difficult to carry out the work of storing the air cushioning material that has a certain weight and that is packed with various forms of packing materials and that is inflated by a predetermined air pressure in a packing container of a specific shape. It was a great hindrance to work efficiency. In addition, since the air cushioning material itself is sealed inside the packaging container together with the packaged body, if the air cushioning air pressure fluctuates according to changes in the outside air temperature during storage or transfer, it will be handled There was no means, and it was a big problem to be solved. In order to solve the problems remaining in the prior art, the present invention further improves the above-described prior art, and even for a packaged body having various shapes despite having a compact structure, It can be used flexibly, and can also be used as an air cushioning material that enables efficient packing work.In addition, it can be used during storage and between the packed cargo and the cargo and between the cargo and the container. The purpose is to provide a low-cost universal air dunnage bag that can stably protect cargo in containers by absorbing external forces such as shocks even in transportation under harsh conditions. To do.

  An air dunnage bag according to the present invention for solving the above-mentioned problems is an air for protecting the packing body from external force such as an impact by interposing the packing bodies or between the packing body and the inner wall of the transport container. In the cushioning material, two side synthetic resin films are joined together and the side edge portion forming the end portion of the entire outer frame is thermally welded so that at least one air inlet is provided at one end portion thereof, and A plurality of air chambers that flow through each other by thermally welding so that at least one or more air circulation ports are provided in a side edge portion that is vertically divided into a plurality of intermediate portions between the side edge portions. And an outer bag made of a separate cylindrical synthetic resin sheet that covers the outside of the inner bag, and at one end of the outer edge that forms the end of the outer frame of the outer bag A small opening is provided to draw out the air inlet, The corresponding side edges arbitrary part of the inner bag parts, are partially joined is to summarized as air Dan'nejibakku characterized configuration requirements that are formed integrally.

  In the air dunnage bag according to the present invention, the synthetic resin film forming the inner bag is selected from PE, PE / PA, etc. having a thickness of 50 to 150 μm, and is used. It is characterized by.

  Further, in the air dunnage bag according to the present invention, the cylindrical synthetic resin sheet forming the outer bag is made of a synthetic resin sheet having excellent rigidity such as PE cloth, PP cloth, laminated kraft paper having a thickness of 20 to 50 μm. It is characterized by being used by selecting from among them.

  In the air dunnage bag according to the present invention, the joining means when the arbitrary portion of the outer edge portion of the outer bag and the side edge portion of the corresponding inner bag are partially joined together is formed as a high-frequency winder. (Ultrasonic wave), laser beam welding, sewing machine application, and the like are preferred embodiments.

  The air dunnage back according to the present invention further includes the air inlet provided at one end portion of the side edge portion, wherein each air chamber to be formed is communicated with each other via an air flow passage formed at the edge portion. By injecting more air, each air chamber expands uniformly with a uniform air pressure.

  The air dunnage back according to the present invention is characterized in that a check valve made of a synthetic resin film made by combining two sheets is welded to an air inlet provided at one end of the side edge of the inner bag. To do.

  Furthermore, in the air dunnage bag according to the present invention, a separate air injection valve is attached to the air inlet provided at one end of the side edge of the inner bag, and the air inlet is thermally welded after the air is injected. This is a preferred embodiment.

  In the air dunnage bag according to the present invention, the synthetic resin sheet forming the outer bag is a cloth or non-woven fabric selected from synthetic resin fibers such as polyamide fiber, polyester fiber, polypropylene fiber, and polyethylene fiber. This is a preferred embodiment.

  Further, in the air dunnage back according to the present invention, the air dunnage back is preliminarily provided in the gap between the packing objects stored in the packing container and / or between the packing object and the inner wall of the packing container, Next, air is injected from an air inlet provided in the air dunnage back, and the entire air chamber is uniformly inflated so that the outer bag is packed with each other and / or inside the packing body and the packing container. It is characterized in that it is configured to be pressed against the wall surface evenly and to protect the packaged body from external force such as impact.

  The air dunnage bag according to the present invention has a cylindrical outer bag in accordance with the dimensional shape of a packing body made of a packing container such as a cardboard box or a wooden box. The air dunnage back itself is formed of a rectangular inner bag partitioned into a plurality of air chambers, and the air dunnage back before the air is injected between the packaging bodies stored in the container and / or Each air chamber of the inner bag that forms an air dunnage back is provided by injecting air from an air inlet port that is installed between the package and the inner wall of the container and then drawn in advance from a small mouth of the outer bag. By inflating to air pressure, a suitable air cushioning area is formed by interposing between the packing bodies in the container or between the packing body and the container inner wall. It effectively absorbs the external force of the container and can stably protect the cargo in the container. As a result, the package can be prevented from collapsing and the cargo of the packed product etc. can be sound. It can be transported to the destination in a safe state.

  The air dunnage bag according to the present invention that enables such an effect basically has at least one side edge portion that forms the end portion of the entire outer frame by combining two rectangular synthetic resin films at one end portion. In addition to heat welding so as to provide two air inlets, at least one or more air circulation ports are provided in the edge part vertically divided in the longitudinal direction between the side edges. The inner bag is formed with a plurality of air chambers that flow through each other by heat welding, and an outer bag made of a separate cylindrical synthetic resin sheet that covers the outside of the inner bag. A small opening for drawing out the air inlet is provided at one end of the outer edge forming the end of the outer frame, and any part of the outer edge is partially joined to the corresponding side edge of the inner bag. Provided by a very simple structure that is formed as one piece It is.

  The air dunnage bag according to the present invention configured as described above is a kraft paper in which an outer bag protecting an inner bag is laminated, and a conventional air dunnage bag in which a PP cloth or a PE cloth is laminated on the kraft paper. In contrast, the unit cost of the materials used is not only greatly saved, but the structure is simplified, so that the manufacturing cost can be reduced to about 1/3, and the product itself is extremely The weight is reduced, and the transport and storage space prior to use is reduced, making total handling extremely easy. Furthermore, the air dunnage bag according to the present invention is not a structure in which the inner bag and the outer bag are in close contact with each other, but the inflatable inner bag constituted by a plurality of air chambers having air communication ports communicating with each other has a cylindrical shape. Since it is partially joined and integrated in such a state that it is inserted inside the outer bag, there is no unnecessary resistance at the time of air injection, and quick sealing is possible, and the injected air is in each air chamber. Since the entire system is inflated with uniform air pressure, stress concentration due to air pressure is prevented in advance, and it is stable with uniform and wide surface pressure between packages and / or between the package and the container inner wall. Press contact. In addition, since the air dunnage back before air injection is inserted into a predetermined position, air is injected, and each air chamber is expanded to a predetermined air pressure. The efficiency of the loading operation is significantly improved. In addition, the air dunnage bag according to the present invention basically has a double structure, and an air layer exists between them, so that it is resistant to dew condensation even when it is used for storage or transportation in a severe environment where the temperature changes significantly. In addition, it is possible to adjust the internal pressure easily and flexibly by providing an air inlet on the outside of the packaging container. Stable transportation and storage in the country are guaranteed for a long time. In addition, the air dunnage bag according to the present invention not only secures a stable storage state of cargo in the container, but also provides an appropriate air chamber according to the size and shape of the packaged body and the packing container. Therefore, it can be suitably used as a cushioning material in packing work in which a packaged body such as a product is stored in a packing container such as a cardboard box, and even in that case, the air chamber is expanded. When functioning as a cushioning material by pressing the inner side to the cargo and the outer side to the inner wall of the packaging container, it is possible to obtain a large contact area with each other, so stress concentration is avoided and stable It is possible to secure an effective buffer function over a long period of time.

  In addition, the air dunnage back according to the present invention is basically a simple structure, but arbitrarily adjusts the size of the synthetic resin film according to the size and shape of the packaged body, By arbitrarily increasing or decreasing the edge portion, it is possible to easily handle literally various packages. Furthermore, the air dunnage bag according to the present invention can freely heat-seal any part of the inner bag by using two layers of the same material, specifically, a multilayer PE or PE / PA film. In addition, the above-mentioned processing is possible, and since the outer bag can be made of the same kind of material, maintenance such as repair is easy, and it is recycled and used effectively after use. In addition, the air dunnage bag according to the present invention is extremely compact in its structure, so the costs associated with storage and transportation when not in use are reduced, and incineration is unavoidable. In doing so, there is little risk of the generation of harmful substances, and sufficient consideration has been given to environmental protection as well as effective use of resources.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. However, the present invention is not restricted thereby, and design changes can be freely made within the scope of the gist of the present invention.
1 is a partially broken perspective view showing a state in which air is injected and inflated to explain an air dunnage back according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a single inner bag in FIG. FIG. 3 is a perspective view showing a single outer bag formed in a cylindrical shape in the same embodiment, FIG. 4 is a development view for explaining an air dunnage back in the same embodiment, and FIG. 3A is the air dunnage. The top view which shows the inner bag single body before inject | pouring the air which comprises back | bag, (b) is a top view which similarly shows the outer bag single body before injecting air, (c) is the sectional view on the AA line in FIG. FIG. 5 is a partially broken perspective view (corresponding to FIG. 1) showing a state where air is injected and inflated to explain an air dunnage back according to another embodiment of the present invention, and FIG. Explaining the air dunnage back in the embodiment (A) is a plan view showing a single inner bag before injecting air constituting the air dunnage back, (b) is a plan view showing a single outer bag before injecting air. , (C) is a cross-sectional view taken along line BB in FIG. 5, FIG. 7 is a plan view showing a synthetic resin sheet body before forming a single outer bag in still another embodiment according to the present invention, and FIG. It is a perspective view at the time of forming the cylindrical outer bag in the same Example.

  The air dunnage bag according to the first embodiment of the present invention employs a cylindrical synthetic resin thin film made of multi-layer PE having a thickness of 110 μm as a material for the inner bag, and the film is shown in FIG. As shown in Fig. 2, the two-layer plane is cut into a rectangle having a width of 975 mm and a length (length) of 2200 mm, and a side edge 2-1 that forms upper and lower outer frames thereof, and a side edge 2-1 The side edge part 2-2 which is inside and vertically cuts between the side edge parts 2-1 and is divided into three equal parts to form a sealed rectangular bag body by heat welding, respectively, and the side surface in the vertical direction As shown in FIG. 4 (a), a known check valve 4 made of a double-layered PE film is thermally welded to one end of the air inlet, and at the same time, between the edge portions 2-2. As an air flow outlet 2-3 in which a plurality of unwelded portions are provided equally to allow mutual flow To form the inner bag 2 made of rectangular air chamber 3 accommodations for Tsuryu each other. On the other hand, as shown in FIG. 4B, a cylindrical synthetic resin sheet having a fiber diameter of 700 denier and 9 × 9 PP cloth and having substantially the same dimensions as the inner bag 2 is prepared. As shown in FIG. 3, a small outlet for taking out the check valve 4 is provided in a portion corresponding to the check valve 4 attached to the side surface of the inner bag 2 at one end in the vertical direction as a valve outlet 3-3. Such a cylindrical outer bag 3 was formed. Next, the inner bag 2 is inserted inside the cylindrical outer bag 3 to form two sheets, and after positioning the check valve 4 by drawing out the check valve 4 from the valve outlet 3-3, The side edge portion 2-1 of the inner bag and the outer edge portion 3-1 of the corresponding outer bag are overlapped and the entire length thereof, or an arbitrary portion thereof, is partially sewn with an ultrasonic sewing machine, and both are integrated. The air dunnage bag 1 according to this example was completed by bonding.

  In the present embodiment, the side edge 2-1 of the inner bag 2 and the outer edge 3-1 of the outer bag are partially stitched with an ultrasonic sewing machine as described above, as shown in FIG. Although the air dunnage bag 1 has upper and lower edges, the sewing or joining of the side edge portion 2-1 and the outer edge portion 3-1 can be performed with a normal sewing machine hook. It is optional to partially weld by laser beam irradiation. However, the relationship between the inner bag 2 and the outer bag 3 in the present invention is not integrated in a sealed state in any case, and the outer bag 3 and the inner bag 2 are separate from each other, While being covered so as to protect the outside, it is integrated so as to facilitate arrangement and interior decoration at an arbitrary place by being partially joined. Thus, the inner bag 2 and the outer bag 3 are configured as separate bodies so that the resistance at the time of air injection is remarkably reduced, and not only the air injection time is completed in a very short time, but also the air The air chambers 2-5 that flow through each other by the flow passage 2-3 are inflated with uniform air pressure, and the outer bag 3 that covers the outside is separate from the inner bag 2 and is free. Since the so-called air pressure concentration phenomenon does not occur, the buffer surface is formed in a flat state as shown in FIG. 4C. Therefore, even when intervening between the corrugated cardboard boxes, or the gap between the corrugated cardboard box and the inner wall surface of the container, the stress is dispersed by the pressure contact while maintaining a flat and wide contact area, and stable. It was confirmed that the safety of the cargo was ensured for a long time by exerting the buffer function.

The air dunnage bag 1 according to the present embodiment manufactured as described above is installed in an iron frame having a width of 1000 mm, a length of 2300 mm, and a height of 200 mm, and the internal pressure is increased by 5 Kpa / cm ² every 60 seconds. As a result of injecting air until the bag was broken and subjecting it to a safety strength test, a slight air leak was detected when the air pressure reached 75 Kpa / cm ^2, and the function as an air cushioning material built in the container , Proved to be sufficient in strength.

As shown in FIG. 6A, substantially the same as the first embodiment except that a single edge 2a-2 is provided in the center of the inner bag 2a and two rectangular air chambers are provided. Air dunnage bag 1a was formed. The air dunnage bag 1a after the air injection is as shown in FIG. 5, and the form of the buffer surface is as shown in FIG. 6 (c) which is a cross-sectional view along the line BB in FIG. As a result of using the air dunnage bag 1a created according to the present embodiment as a cushioning material for a packing body in a container in the same manner as in the first embodiment, almost the same effect was confirmed. The air dunnage bag 1a was also subjected to a pressure strength test under the same conditions as in Example 1. As a result, air leakage was not detected until it reached 73 Kpa / cm ² as in Example 1. It has been proved that the function as an air cushioning material is sufficient in strength.

  As shown in FIG. 6A, the inner bag 2a in this embodiment includes upper and lower side edge portions 2a-1 and a side edge portion 2a-2 that vertically cuts the center between the side edge portions 2a-1. Except for heat welding, it is produced in a sealed bag shape in substantially the same manner as in Example 1, and the outer bag 3a is also formed with outer edge portions 3a-1 on the upper and lower sides thereof as shown in FIG. As a single unit, the final shape is formed in a cylindrical shape as shown in FIG. The inner bag 2a is inserted into the outer bag 3a formed in this manner to form two sheets, and the upper and lower side edge portions 2a-1 and the outer edge portion 3a-1 are partially laser-beamed as described above. Irradiated and integrally joined, an air dunnage bag 1a in this embodiment as shown in FIG. 5 is provided. At this time, the check valve 4a welded to the air inlet and the valve outlet 3a-3 serving as the outlet are secured in the same manner as in the first embodiment. In the air dunnage bag 1a according to the present embodiment, the inner bag 2a and the outer bag 3a are substantially separated so that the resistance at the time of air injection is remarkably reduced, and the air injection time is extremely short. In addition, the air chambers 2a-5 that mutually flow through the air flow ports 2a-3 are inflated with uniform air pressure, and an outer bag 3a that covers the outer side of the air chambers 2a-5 is formed in the inner bag 2a. Since it is a separate body and covered in a free state, a so-called air pressure concentration phenomenon does not occur, and the buffer surface is formed in a flat state as shown in FIG. 6C. Therefore, even when intervening between the corrugated cardboard boxes or the gap between the corrugated cardboard box and the inner wall surface of the container, a stable cushioning function is exhibited by pressure contact while maintaining a flat and wide contact area. As a result, it was confirmed that the safety of the cargo was ensured for a long time.

  Instead of the synthetic resin cylindrical body forming the outer bag, a sheet body made of the same kind of material is adopted, and as shown in FIG. 7, it is cut into a rectangle having a width of 1975 mm and a length (length) of 2200 mm, and the end face in the horizontal direction An adhesive surface 3b-3 having a width of 10 mm is formed on the surface, and the adhesive surface 3b-3 is heat-welded so as to overlap the end surfaces of the multiple ends, thereby forming a cylindrical body, and a valve outlet 3b- 8 is obtained, and the outer bag 3b as shown in FIG. 8 is obtained. The outer bag 3b is integrally joined to the inner bag 2 according to the first embodiment by the same means as in the first embodiment, and the air dunnage according to the present embodiment is used. A bag 1b was produced. As a result of subjecting the obtained air dunnage back 1b to a performance test such as a pressure resistance test, a result according to Example 1 was confirmed.

  An inner bag 2b that can be bent at a substantially right angle by dividing the side edge portion of the cylindrical synthetic resin film forming the inner bag at a further small interval is formed, and the outer side of the inner bag 2b is covered separately. The outer bag 3c was joined by the same means as in Example 1 to produce an air dunnage back 1c for packing a notebook computer (not shown). The obtained air dunnage bag 1c protects the personal computer with its flat and wide contact surface when storing it in a cardboard box of a notebook personal computer, and in particular stably protects its upper lid, It was confirmed that multiple stacking is easy.

  In the air dunnage bag producing means of the present invention, for example, the size of the outer bag relative to the inner bag is usually preferably about the same or smaller. Specifically, the cylindrical air chamber of the inner bag has 2 In the case of a room, the inner bag is preferably about 1.2 with respect to the outer bag 1, and in the case of three rooms, the ratio is preferably about 1: 1 to 1.3. It is desirable that the bag is formed slightly larger. If the size of the outer bag is made extremely small relative to the inner bag, the resistance at the time of air injection is increased and the air injection in a short time is obstructed, and the expansion coefficient of the outer bag with respect to the inner bag is also increased. There is a concern that the strength will be impaired, and conversely, if the outer bag is too large, the inner bag having excellent spreadability will expand too much, and the buffer function will be lowered and the strength may be impaired. Further, in the inner bag forming method according to the present invention, a synthetic resin film formed in a cylindrical shape in advance is prepared, and in each of the above embodiments, the upper and lower side edges which are the end portions are cut in advance to the same dimensions. The part (open part) is heat-sealed into a sealed bag shape, but instead of the cylindrical synthetic resin, the sheet-like film is cut in advance to the length of two sheets and folded in two from the center part Therefore, it is not hindered to weld the end portion into a cylindrical shape. The air dunnage bag according to the present invention is used as a cushioning material for fixing when loading a product or the like stored in a cardboard box or a wooden box into a container or the like as a transport container in the first to third embodiments. Although the use has been specified, the air dunnage bag according to the present invention can be freely changed in size and shape including the number and size of air chambers. It can be suitably used for an application as a so-called packing air cushioning material for storing a load such as a cardboard box or a wooden box. Furthermore, the inner bag according to the present invention is specified to some extent as a specific synthetic resin material because it is required to have excellent spreadability as shown in the above embodiment, but it is thinner to avoid air resistance as much as possible. The material is desirable. The synthetic resin material used for the outer bag may be the same type of material such as PP or PE non-woven fabric, PE / PE cloth / PE, PP / PP cloth / PP, etc., provided that it is more rigid than the inner bag. Can be freely selected to some extent.

  As another embodiment of the present invention, the above synthetic resin film for forming an air dunnage back, specifically, PE / PE cloth / PE, PP / PP cloth / PP, etc. previously mixed with an antistatic agent It is also one of preferred embodiments that an air dunnage back is used to prevent charging of products to be packed and the like, and to prevent dust from adhering thereto. The component used as the antistatic agent is not limited in the range within which the object of the present invention can be achieved, but the synthetic resin constituting the raw material of the air buffer material of the present invention, specifically, the high molecular polyethylene resin A polymer antistatic agent, more specifically a polymer having an organic acid, a sulfonic acid, an organic ammonium salt, or the like, which can be easily mixed in the liquid crystal and the like and does not impair the object of the present invention is preferably selected.

  As is clear from the above embodiments, the air dunnage bag according to the present invention is packed with various products and parts, etc., which are to be packed, for example, in the size and shape of a packing body made of a packing container such as a cardboard box or a wooden box. In addition, a double-structure air dunnage bag itself is formed, consisting of a cylindrical outer bag and a rectangular inner bag that is basically separate from the outer bag and divided into a plurality of air chambers. The air dunnage bag before the air is injected is installed between the packing bodies housed in the container and / or between the packing body and the inner wall of the container, and then the air drawn out from the mouth of the outer bag in advance. By injecting air from the inlet, each air chamber of the inner bag forming the air dunnage back is inflated to a predetermined air pressure, so that the packing bodies in the container or between the packing body and the container To form a suitable air cushioning area, effectively absorb external forces such as shocks due to vibration factors, etc., and prevent cargo collapse in the container and stabilize the cargo Protecting and at the same time the air dunnage back according to the present invention is basically double-structured, and since there is an air layer between them, it is not affected by condensation caused by temperature changes, resulting in In addition, cargo such as products packed in a package can be transported to a destination in a healthy state. In addition, the air dunnage bag according to the present invention has a structure in which an inner bag composed of a plurality of communicating air chambers and a cylindrical outer bag that covers the outside thereof are partially joined and integrated as described above. Therefore, the resistance at the time of air injection is remarkably reduced, and not only the time for injecting the air is completed in a very short time, but also the air chambers mutually flowing through the air inlets have a uniform air pressure. Since the outer bag that covers the outer side is separated from the inner bag and is covered in a free state, the so-called air pressure concentration phenomenon does not occur, and the cushioning surface is flat as a whole. Is formed. Therefore, even when intervening between the corrugated cardboard boxes or the gap between the corrugated cardboard box and the inner wall surface of the container, a stable cushioning function is exhibited by pressure contact while maintaining a flat and wide contact area. As a result, it was confirmed that the safety of the cargo was ensured for a long time. Furthermore, the air dunnage bag according to the present invention is not limited to its use as a cushioning material for fixing when loading a product or the like stored in a cardboard box or a wooden box as described above into a container or the like as a transport container. Because the size and shape of the inner bag, including the number and size of the air chambers, can be freely changed, so-called packing is used to store the cargo such as products in cardboard boxes or wooden boxes. It can also be suitably used for use as an air cushioning material. The air dunnage back according to the present invention is selected from the same material, specifically, a film made of PE / PE cloth / PE or PP / PP cloth / PP, and used to seal any part thereof. Can be freely processed under the same conditions, and the processing is easy.Because it is the same material, maintenance such as repair is easy, and it can be recycled and used effectively after use. In addition, the air dunnage back according to the present invention has a very simple and compact structure of the main body itself, and the material used is reduced to the limit, and the air dunnage back before use is a thin film. Or because it is in the form of a sheet, logistics costs for storage and transportation when not in use are reduced, which contributes significantly to energy savings. Away from, it can be expected air injection type cushioning material i.e. a wide range of applications as air Dan'nejibakku.

It is a partially broken perspective view showing a state in which air is injected and inflated to explain an air dunnage back according to an embodiment of the present invention. It is a perspective view which shows the inner bag single-piece | unit in FIG. It is a perspective view which shows the outer bag single-piece | unit formed in the cylindrical shape in the Example. It is an expanded view for demonstrating the air dunnage back in the Example, (a) is a top view which shows the inner bag single body before inject | pouring the air which comprises this air dunnage back, (b) is also air. The top view which shows the outer bag single body before inject | pouring, (c) is the sectional view on the AA line in FIG. FIG. 5 is a partially broken perspective view (corresponding to FIG. 1) showing a state in which air is injected and inflated in order to explain an air dunnage back according to another embodiment of the present invention. It is an expanded view for demonstrating the air dunnage back of the other Example which concerns on this invention, (a) is a top view which shows the inner bag single-piece | unit before inject | pouring the air which comprises this air dunnage back, (b) ) Is a plan view showing the outer bag alone before air is injected, and (c) is a cross-sectional view along the line BB in FIG. In another Example which concerns on this invention, it is a top view which shows the synthetic resin sheet body before forming an outer bag single-piece | unit. It is a perspective view at the time of forming the cylindrical outer bag in the same Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a Air dunnage back 2, 2a Inner bag 2-1, 2a-1 Side edge part 2-2, 2a-1 Edge part 2-3, 2a-3 Air flow path 2-4, 2a-4 Heat Welding part 2-5, 2a-5 Air chamber 3, 3a, 3b Outer bag 3-1, 3a-1, 3b-1 Outer edge part 3-2, 3a-2, 3b-2 Joint part 3-3, 3a- 3, 3b-3 Valve outlet 3b-4 Adhesive surface 4, 4a Check valve

Claims (9)

In an air cushioning material for protecting the packing body from external forces such as impacts between the packing bodies or between the packing body and the inner wall of the transport container, the two square synthetic resin films are combined together. The side edges that form the ends of the outer frame are thermally welded so that at least one air inlet is provided at one end thereof, and the intermediate part between the side edges is longitudinally cut in the longitudinal direction into a plurality of pieces. An inner bag in which a plurality of air chambers that flow through each other is formed by heat welding so that at least one or more air circulation ports are provided in the separated edge portion, and a separate outer cover for the inner bag. An outer bag made of a cylindrical synthetic resin sheet, and is provided with a small opening for drawing out the air inlet at one end of the outer edge forming the end of the outer frame of the outer bag. The part is partially joined to the corresponding side edge of the inner bag. Air Dan'nejibakku, characterized in that it is formed as a. In the air dunnage back, a synthetic resin film forming an inner bag is selected from PE, PE / PA, etc. having a thickness of 50 to 150 μm, and is used. Item 1. An air dunnage bag according to item 1. In the air dunnage back, the cylindrical synthetic resin sheet forming the outer bag is selected from a synthetic resin sheet body having excellent rigidity such as PE cloth, PP cloth, laminated kraft paper having a thickness of 20 to 50 μm. The air dunnage bag according to claim 1 or 2, wherein the air dunnage bag is used. In the air dunnage back, a joining means when an arbitrary portion of the outer edge portion of the outer bag and a corresponding side edge portion of the inner bag are partially joined together to form a unit is a high-frequency wilder (ultrasonic wave). The air dunnage back according to any one of claims 1 to 3, wherein the air dunnage back is laser beam welding or sewing. In the air dunnage back, each air chamber to be formed is in communication with each other through an air flow passage formed at the edge, and air is injected from the air inlet provided at one end of the side edge. 5. The air dunnage back according to any one of claims 1 to 4, wherein each air chamber is evenly expanded with a uniform air pressure. In the air dunnage back, a check valve made of a synthetic resin film made by combining two sheets is welded to an air inlet provided at one end of a side edge of the inner bag. The air dunnage bag according to any one of 5. In the air dunnage back, a separate air injection valve is attached to an air inlet provided at one end of the side edge of the inner bag, and the air inlet is thermally welded after the air is injected. The air dunnage bag according to any one of 1 to 6. In the air dunnage bag, the synthetic resin sheet forming the outer bag is a cloth or non-woven fabric selected from synthetic resin fibers such as polyamide fiber, polyester fiber, polypropylene fiber, and polyethylene fiber. The air dunnage bag according to any one of claims 1 to 7. In the air dunnage back, the air dunnage bag is preliminarily installed in the gap between the packing objects stored in the packing container and / or between the packing object and the inner wall of the packing container, and then the air dunnage back By injecting air from the air inlet provided in the back and uniformly inflating the entire air chamber, the outer bag is pressed against the packed bodies and / or the packed body and the inner wall surface of the packing container evenly. The air dunnage back according to any one of claims 1 to 8, wherein the air dunnage back is configured to protect a packaged body from an external force such as an impact.

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