Container bag inner bag attachment device

Abstract

To provide an inner bag attachment device for a container bag, which expands and unfolds the inner bag to make it fit the container bag. [Solution] It has a circular or disk-shaped, square ring-shaped or square plate-shaped unfolding part 2 and legs 3, which are connected by supports 4, the unfolding part is smaller than the legs, and the virtual outer shape created by the trajectory created by fully rotating a line segment connecting points on the outer periphery of the unfolding part and the legs around the central axis is a truncated cone or a frustum of a pyramid. The assembly work that is usually done inside the flexible container stand can be efficiently done outside the stand, and the integrated container bag and inner bag can be moved into the flexible container stand together with the container bag inner bag attachment device 1, and only the container bag inner bag attachment device can be removed, thereby standardizing work procedures and improving work quality.

Description

[Technical Field]

[0001] This invention is a technology related to flexible container bags that are used in various industrial fields such as agriculture, manufacturing, construction, and waste disposal. [Background technology]

[0002] Flexible container bags are large, lightweight, and sturdy bag-shaped containers made from synthetic fibers. They are used in agriculture and manufacturing to store and transport large quantities of granular or powdered feed, raw materials, and finished products, and at construction sites to store soil, sand, and waste. As a fiber product, they are also flexible, allowing them to be folded when not in use, saving space for storage. They are also called ton bags because their capacity is estimated to be around one ton, and are sometimes abbreviated as flexible container bags or container bags. In the following explanation, we will use the abbreviated term "container bag." In the Hamadori region of Fukushima Prefecture, including Okuma Town and Iwaki City, where the applicant operates, various projects are being carried out daily to recover from the damage caused by the tsunami caused by the Tohoku Pacific Ocean Earthquake of 2011 and the explosion at the Fukushima Daiichi Nuclear Power Plant that occurred immediately afterwards. A large amount of container bags are consumed in these projects, and the container bags are used at the sites in the following manner.

[0003] As a preliminary step, the placement location and subsequent transport route of the container bag are considered based on the contents to be filled without compromising the safety and efficiency of the work. The container bag with the specifications most suited to the work is selected, and if necessary, an inner bag is prepared and placed inside the container bag. Container bags, which are often described as flexible, are pliable and easy to bend. However, they do not necessarily stand upright or have high stability. Therefore, devices are available to help maintain a stable and self-standing state. One such device is commonly known as a flexible container stand, which is a metal or plastic frame that supports an empty container bag placed inside it. This device stabilizes the shape of the container bag, prevents tipping, and enables safe and efficient filling work. After placement, the container bags, which are upright on the flexible container stand, are filled with the contents in a manner that is optimal for the site conditions, while being careful not to exceed their capacity or load capacity.At this time, the contents loaded into the container bags are loaded in an evenly distributed manner so that they do not become unevenly distributed within the container bags.In particular, when using an inner bag inside a container bag, the container bag and inner bag must be combined and arranged in a manner that allows them to fit together and prevent unnecessary slack in the middle, in order to properly fill the contents. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-31980 [Patent Document 2] Japanese Patent Application Publication No. 2018-118749 Summary of the Invention [Problem to be solved by the invention]

[0005] Container bags come in a variety of specifications, and some products are manufactured with an inner bag already installed. Depending on the work involved, workers may need to combine the container bag and the inner bag appropriately, for example, using not just one inner bag but two or more. The container bag inner bag of Patent Document 1 is a device that proposes an easy-to-use container bag inner bag that ensures the inner bag and the container bag are integrated into one. While this technology relates to the inner bag itself, it aims to improve the efficiency and convenience of container bag placement. Specifically, it proposes a method of folding a thermoplastic resin bag multiple times in a specific manner and individually packaging it into a roll, or forming the end of the roll into a triangular shape and providing a non-adhesive portion when securing it with adhesive tape. This significantly reduces the effort and time required for placement compared to conventional inner bags, providing an inner bag that can be easily installed inside a container bag. An improved version of this inner bag was also proposed in Japanese Patent Laid-Open Publication No. 11-152183. This inner bag simplifies placement for customers by gusset-folding a large-diameter tubular film during the manufacturing process and adjusting the folded width to the inner diameter of the container bag.

[0006] All of these are intended to improve the efficiency of container bag placement work by devising the shape of the inner bag itself, etc. However, on the other hand, in a situation where work has to be done within the framework of limited business expenses, such inner bags have not yet been widely adopted from the perspective of cost, etc. Furthermore, in order to allow flexible container bags to stand stably and maintain the shape of their openings, many of the container bags used on-site are placed in flexible container stands. At this time, the opening at the top of the container bag is opened, and the upper lid portion is then deployed outward at the top end of the flexible container stand to open it. An example of such a flexible container stand is the flexible container bag stand described in Patent Document 2.

[0007] At reconstruction sites, to prevent the leakage of wastewater and other contaminated materials from the soil, sand, and waste materials filled into the container bags, one or more inner bags are inserted into the container bags, as mentioned above. In this process, workers individually unfold and expand the container bag and the inner bag placed in the flexible container stand, and work to integrate them while minimizing slack. Since it is difficult to expand the large, thick inner bag as desired, workers use long, rod-shaped auxiliary tools to laboriously expand and unfold the inner bag. In particular, when incorporating the commonly available flat-type inner bag so that it fits the shape of the container bag, many workers on site spend time and effort, performing the placement work under less than ideal conditions. [Means for solving the problem]

[0008] The purpose of this invention is to provide a container bag liner attachment device that can achieve more efficient placement work than conventional methods, even when using low-cost, flat, and generally common container bag liner bags, rather than gusseted container bag liner bags, i.e., liner bags with folds or depth at the sides or bottom. This is also true when using multiple liner bags, not just one. The container bag inner bag attachment device of the present invention has a circular or disc-shaped deployment portion and similarly circular or disc-shaped leg portions, which share a virtual vertical central axis. The term "virtual" used in the present invention does not necessarily mean that this vertical central axis is a real component of the present invention, but rather refers to the concept of the vertical central axis being based on the relative positions of the deployment portion and the leg portions. The diameters of the deployment portion and the leg portions are smaller than those of the leg portions, and they are connected in parallel by one or more struts. The overall appearance of the container bag inner bag attachment device is defined by a plane defined by a set of line segments, which are obtained by integrating line segments connecting corresponding points on the circumference of the deployment portion and the leg portions in all directions around the vertical central axis, and the upper and lower deployment portions and leg portions. Hereinafter, this will be referred to as the "virtual appearance." If the deployment section is positioned at the top and the legs at the bottom, the deployment section is smaller than the legs, and so its virtual appearance is a truncated cone shape with the top surface tapered than the bottom surface. There are also specifications in which the deployment section and legs are shaped like a rectangular ring or a rectangular plate to match the shape of a rectangular container bag. The diagonal length of the deployment section is smaller than that of the legs, and the virtual appearance of an inner bag attachment device for container bags of this specification is a truncated cone shape with the top surface smaller than the bottom surface. To accommodate container bags of different sizes, some specifications include mechanisms for adjusting the size of the deployment section and the legs and the length of the support posts. To improve the ease of use of the container bag inner bag attachment device, some specifications also include a peeling mechanism on the outer edge of the deployment section to reduce tangling and friction with the inner bag. Of these components, the deployment section is the section used by workers to expand and unfold the bottom of the inner bag. Its shape is circular or square, depending on the specifications of the container bag. It also has circular or square legs, with supports connecting the deployment section to the legs. The container bag inner bag attachment device, constructed from these components, has a virtual truncated cone or pyramid shape that conforms to the shapes of the container bag and inner bag and makes it easy to insert and remove them from the flexible container stand. The peeling mechanism, located on the outer edge of the deployment section, has the effect of separating the deployment section and the inner bag by disentangling them. [Effects of the Invention]

[0009] By using the container bag inner bag attachment device, the arrangement work when assembling the inner bag inside the container bag can be made more efficient. In the conventional work, workers had to insert the inner bag into the container bag inside the flexible container stand and carefully expand and unfold the inside by hand. This takes time, but there is little sense of completion, and judgment of progress is left to the subjective judgment of each worker. On the other hand, a worker using the container bag inner bag attachment device assembles the container bag and inner bag using the container bag inner bag attachment device outside the flexible container stand, and then expands and unfolds them. This allows the container bag and inner bag to be assembled efficiently and reliably without loosening, greatly improving the efficiency and quality of the container bag placement work. The container bag and inner bag are then moved into the flexible container stand together with the container bag inner bag attachment device while remaining properly integrated and stacked, and then the container bag inner bag attachment device alone is removed from the flexible container stand. This series of operations allows the inner bag to be expanded and unfolded easily, safely, and reliably, standardizing the procedures and progress judgments for container bag placement work, such as determining when the work is complete, which previously was left to the worker's subjective judgment. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a truncated cone-shaped inner bag attachment device for a container bag. [Figure 2] FIG. 1 is a perspective view showing an example of an existing flexible container stand. [Figure 3] FIG. 10 is a perspective view showing the use of the inner bag attachment device for a container bag. [Figure 4] FIG. 4 is a cross-sectional view showing the positional relationship between the container bag and the inner bag. [Figure 5] FIG. 1 is a perspective view of a truncated pyramidal container bag inner bag attachment device. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be explained below with reference to the drawings. The container bag inner bag attachment device 1 of the present invention has an annular or disc-shaped deployment portion 2 and similarly annular or disc-shaped leg portions 3. These portions are concentric about an imaginary central axis extending vertically, i.e., the vertical central axis. Note that this vertical central axis is conceived from the relative positions of the deployment portion 2 and the leg portions 3, and is not necessarily a portion that actually constitutes the container bag inner bag attachment device 1. The diameter of the deployment portion 2 is smaller than that of the leg portion 3, and the deployment portion 2 and the leg portion 3 are connected in parallel by one or more struts 4.

[0012] If we imagine an infinite number of vertical planes in all directions around the vertical central axis and accumulate the line segments connecting corresponding points on the circumference of the unfolding section 2 and the leg sections 3 above and below on those vertical planes, we can imagine a continuous surface that becomes the side surface. The virtual appearance of the container bag inner bag attachment device 1, which is made up of this virtual side surface, the small unfolding section 2 that becomes the upper surface, and the large leg sections 3 that become the lower surface, is frustum-shaped. In other words, the locus of the line segments connecting points on the circumference of the unfolding section 2 and the leg sections 3 that rotate completely around the vertical central axis forms the side surface, and a truncated cone can be thought of as the virtual appearance of the container bag inner bag attachment device 1. In addition to the specification in which the unfolding portion 2 and the leg portions 3 are annular or disc-shaped, there is also a specification in which they are rectangular annular or rectangular plate-shaped to match the shape of the container bag 6. Since the diagonal length of the unfolding portion 2 is smaller than that of the leg portions 3, the virtual outer shape of the container bag inner bag attachment device 1 in this case is a rectangular truncated pyramid.

[0013] The deployment portion 2 of the container bag inner bag attachment device 1 is a portion used to expand and deploy the bottom of the inner bag 7 in accordance with the shape of the container bag 6. For this reason, it is round or square in shape to match the cross-sectional shape of the container bag 6. Similarly, the container bag inner bag attachment device 1 has legs 3 that are adapted to the shape of the container bag 6. Furthermore, by keeping the deployment portion 2 and the legs 3 parallel to each other so as to be perpendicular to the vertical axis and making the distance between them approximately equal to the height of the flexible container stand 5, there are support posts 4 that function as handles together with the legs 3 during operation. The virtual external shape of the container bag inner bag attachment device 1 formed by the deployment section 2 and legs 3 is a truncated cone or a truncated cone shape to correspond to the round or square specifications of the container bag 6. These shapes enable workers to stably expand and deploy the container bag 6 and inner bag 7 over the entire length and width, and are the optimal shape when incorporating the inner bag 7 into the container bag 6, making it easy to load and unload the flexible container stand 5.

[0014] Figure 1 illustrates the container bag inner bag attachment device 1 described above. It is a perspective view showing the overall shape of one specification of the present invention, in which the deployment section 2 and leg sections 3 are annular. This is a stable configuration in which the upper and lower circular ring-shaped sections made of circular pipes are connected at four points above and below by straight pipes of equal length, and represents the storage state of this container bag inner bag attachment device 1 when not in use, or the state before the container bag 6 or inner bag 7 is placed over it and used. However, the configuration shown in Figure 1 is merely one example of the present invention and should not necessarily be limited to this form. Instead of these two rings, the expanding portion 2 and leg portion 3 can be disk-shaped, and in that case, it is possible to consider providing appropriate slits or the like to reduce weight and to serve as markers during work. Also, we have already mentioned specifications in which the expanding portion 2 and leg portion 3 are square-shaped or rectangular-shaped rather than circular.

[0015] In order to aid in the explanation of this invention, the names given to each part by the inventor, based on the function and relative positions of each part, have the following meanings: The annular portion at the top of Figure 1 is the unfolding portion 2 of the container bag inner bag attachment device 1. By using this unfolding portion 2, the worker can smoothly expand and unfold the bottom of the standard, commonly used, flat-bag-shaped inner bag 7 without a gusset into a circular or rectangular shape to fit the shape of the container bag 6. The circular ring-shaped portion provided at the bottom of FIG. 1 is called the leg portion 3 because it has the role of supporting the deployment portion 2 and is positioned relative to the deployment portion 2. The unfolding part 2 of the container bag inner bag attachment device 1 is connected to its leg part 3, and the part made of four straight pipes that hold the unfolding part 2 upward and can also be used as a handle during work are called the support pillars 4.

[0016] In this explanation, we have deliberately used circular and straight pipes for the deploying section 2, legs 3, and support columns 4, but in one prototype of this invention, an inner bag attachment device 1 for a container bag was produced using hollow circular and straight pipes. However, this was a choice made primarily for the purposes of ease of prototyping and weight reduction. Naturally, various other specifications can be considered when selecting the shape, size, length, diameter, material, etc., so there is no reason to necessarily limit it to hollow materials.

[0017] When viewed from above, the circular rings of the unfolding portion 2 and the circular rings of the leg portions 3 in Fig. 1 share a vertical central axis, and the diameter of the unfolding portion 2 is set smaller than that of the leg portions 3. In the perspective view of Fig. 1, when viewed from above with the unfolding portion 2 facing upward, if opposing points on the circumference of the outer edges of the upper and lower circular rings are connected vertically and rotated 360 degrees around the central axis, the virtual overall shape of the container bag inner bag attachment device 1 can be imagined. In this case, the external shape is not cylindrical with the same diameter on the upper and lower surfaces imagined by the circular rings, but rather has a truncated cone shape with the upper part gradually becoming thinner than the lower part.

[0018] The materials for each part, including the deployment part 2, can be metals such as stainless steel or aluminum, or strong, lightweight resins, wood, or bamboo, and the choice should be made taking into account the balance between strength and weight. The size of each part also depends on the size of the flexible container stand 5, but the prototype specifications were set at 700 mm in diameter for the circular deployment part 2 and 900 mm in diameter for the leg part 3. Then, by connecting four straight pipes diagonally to these two rings, the deployment part 2 and leg part 3 were configured to be parallel to each other, maintaining a gap of 1250 mm between them. Furthermore, if stainless steel is used for the pipes of each part and their diameter is about 20 mm, the standard weight of the container bag inner bag attachment device 1 is expected to be about 8 kg, but this can naturally vary depending on the shape and structure, as well as the materials used, etc.

[0019] Regarding the connection of the deployment part 2, legs 3 and support posts 4 of the container bag inner bag attachment device 1, these may be integrally formed by welding or the like, or they may be made separable as required and transported to the site for assembly. In this case, it is possible to consider specifications in which the expanding section 2 and legs 3 are replaceable so that each section can be changed according to the size of the flexible container stand 5, or to provide the expanding section 2 and legs 3 with an adjustment mechanism that allows the size to be changed within a certain range. In this case, a plurality of expansion members are movably incorporated into the member that forms the base of the expanding section 2, etc., and the mechanism is such that the size of the expanding section 2 and legs 3 can be changed as needed and fixed when in use. Similarly, it is also meaningful to make the length of the support pillars 4 changeable within a predetermined range in accordance with the depth of the flexible container stand 5. This may be done by making it possible to connect multiple support pillars 4 of different lengths, or by incorporating an adjustment mechanism for extension and contraction and fixing into the support pillars 4 themselves.

[0020] Container bags 6 are filled with various materials and used or reused each time they are stored or transported, resulting in a large amount of waste. The contents vary widely, including grains, fertilizers, and feed in the agricultural sector, and raw materials and products in the manufacturing industry, and come in a variety of forms, including granular and powdered forms. They are also used to store and transport wet soil and construction waste at construction and reconstruction sites, as well as other materials. The container bag 6 has a wide variety of specifications, such as its configuration and size, but a typical product that is widely known as a ton bag has the following configuration and size.

[0021] First, the main body of the container bag 6 has a bag-like structure to accommodate the contents. Because it needs to be strong and durable, it is often made of thick fabric, primarily made from synthetic fibers such as polypropylene or polyethylene. It is often available in beige or black, and there are different specifications such as laminated or mesh types, as well as some that are breathable or conductive. In terms of shape, in addition to round container bags 6 with a circular bottom, square container bags 6 with a square bottom are also available. The top of this body is the opening for putting the contents in. Its shape can be a fully open type, where the lid continues from the body and extends upward, a half-open type, where only part of the top lid is open, or a spout type, where a cylindrical part is attached. Full-open types are often used at construction sites to efficiently store soil and waste, and these openings come with a string or tape to close the lid. The container bag 6 is equipped with a lifting section made of a belt or rope on the main body so that it can be safely lifted by a crane or forklift when it is filled with contents and becomes heavy. Depending on the number of lifting points required for stable transportation, there are specifications such as two-point lifting and four-point lifting, and the lifting section is firmly sewn to the main body so that it can withstand the load corresponding to the weight. In addition, there is also a container bag 6 that has a discharge outlet at the bottom of the main body, but this will not be described in detail here.

[0022] An inner bag 7 may be further incorporated inside the main body to prevent leakage of the contents from the container bag 6 or to protect the contents from moisture. Regarding this inner bag 7, container bags 6 are also provided that have the main body and inner bag 7 already integrated, but since these can be used in combination as needed depending on the work requirements, many products with just the inner bag 7 are also provided. This inner bag 7 is often made of a material that prevents moisture penetration, such as polyethylene or aluminum, and is given a thickness necessary to maintain a predetermined strength. Regarding the inner bag 7 as a stand-alone item, there are also inner bags 7 that have gusset-like fold-in portions on the sides or bottom so as to fit the shape of the container bag 6 body, such as those in the aforementioned Patent Document 1. However, from the perspective of manufacturing and procurement costs, simple, flat-bag-shaped inner bags 7 without such gussets are widely used as standard products.

[0023] Next, regarding the size of the round container bags 6 that are often used at reconstruction sites, etc., the standard specifications for products called ton bags are a base diameter of 1100 mm and a body height of 1100 mm. In addition, in the case of container bags 6 with a fully open loading port, the cylindrical part above the opening serves as a lid, and an example of this height is about 800 mm. Because this container bag 6 is made of flexible synthetic fabric, it is inevitable that the container bag 6 will be unstable when left unfilled. A flexible container stand 5, which serves as a holding frame for the container bag 6, is provided as a tool to help the bag stand stably during work, improve the efficiency of the work of pouring the contents, and improve work safety by preventing the bag from tipping over. This flexible container stand 5 is commonly used at many work sites, and an example of this is shown in Figure 2.

[0024] The structure of the flexible container stand 5 is often made by welding metal pipes or rods together, or by assembling them with bolts or the like to form a round or square frame that matches the shape of the container bag 6. To facilitate transportation and storage, some flexible container stands 5 can be separated into multiple sections that can be assembled, such as the flexible container bag stand in Patent Document 2. The material is often steel with a surface treatment applied to ensure excellent durability, and sturdy products are widely used in many work sites. The size of the flexible container stand 5 is designed to match the size of the container bag 6, and in the case of a one-ton round container bag 6, the diameter is about 1100 mm and the height is about 1050 mm. However, these figures vary depending on the manufacturer and product.

[0025] While involved in the earthquake disaster recovery efforts, the inventor realized that there was still a lot of room for improvement in the placement of container bags 6, and has been working on examining ways to improve this. In particular, when storing soil and sand containing radioactive materials from a nuclear accident in a container bag 6 properly, a high level of work is required to seal the contents and isolate them from the outside. At such sites, one effective measure with clear work procedures is to use a method in which two inner bags 7 are embedded inside the container bag 6. When embedding the inner bag 7 into the container bag 6, efforts have been made to integrate them so that they fit together well to increase safety, allow for sufficient filling of soil and sand, prevent damage to the inner bag 7 due to excessive force, minimize unnecessary slack inside, and avoid excessive gaps.

[0026] Under these circumstances, the conventional arrangement of the container bag 6 at the actual site has been carried out in the following procedure. First, the main body of the container bag 6 is placed inside the flexible container stand 5, and after it is unfolded upward, the lid of the container bag 6 is folded back outward at the upper end of the flexible container stand 5. At this time, the shape of the opening is maintained stably without collapsing, and the main body of the container bag 6 is reliably made to stand on its own. At this time, in order to fully unfold the inside of the container bag 6 inside the flexible container stand 5, a long rod-shaped auxiliary tool is used, for example, to gradually expand the inside of the container bag 6 outward, and the main body is fully unfolded. Thereafter, the first and then the second inner bags 7 are pushed into the inside of the container bag 6 in order and expanded, thereby doubling up the inner bags 7 into the container bag 6. At each stage of assembly, workers manually expand and unfold the inner bag 7 from the inside outward, allowing the inner bag 7 to adapt and fit to the shape of the container bag 6. This is done at the stage of arranging the container bag 6, and again at each stage of assembling the two inner bags 7, but all of these tasks require a great deal of work.

[0027] Even installing only one inner bag 7 is a very complicated procedure, but installing a second inner bag 7 places a significant burden on the worker, as the container bag 6 and the first inner bag 7 are already combined, creating a bulky situation. However, in many cases, the expansion and deployment of the inner bag 7 is not fully realized compared to the workload involved. Furthermore, the criteria for determining whether the work has been completed properly are unclear, leaving the decision to the worker's subjective judgment. Therefore, including the ambiguity of such criteria, it is difficult to say that optimal and standardized work standards have been established for the proper placement of container bags 6. Against this backdrop, the inventor came up with the technical idea of the container bag inner bag attachment device 1 of the present invention in order to make great strides in improving work efficiency and optimization, and in standardizing procedures and judgments.

[0028] The new arrangement of the container bag 6 using the container bag inner bag attachment device 1 of the present invention is carried out in the following procedure. The container bag inner bag attachment device 1 is placed in the state shown in Figure 1 with the unfolding section 2 facing up next to the flexible container stand 5 that supports the container bag 6. The worker places the first inner bag 7 over the container bag inner bag attachment device 1 from above, so that the inner bag 7 covers the entire container bag inner bag attachment device 1. A normal inner bag 7 is flat and is a two-dimensional, planar bag when not in use, so the shape of its bottom in particular is not three-dimensional in its current state, and part of it protrudes above the unfolding section 2 of the container bag inner bag attachment device 1. Here, the worker folds the inner bag 7 on the unfolding section 2 toward the central axis of the unfolding section 2 so that both protruding ends face each other. At this time, the container bag inner bag attachment device 1 is located outside the flexible container stand 5, and the work is performed using the circular unfolding section 2, so the worker can perform the work quickly with both hands. By performing this folding work, the flat bottom of the inner bag 7 is made round and flat to fit the circular shape of the unfolding section 2.

[0029] Furthermore, a second inner bag 7 is fitted over the container bag inner bag attachment device 1 that has been fitted with the first inner bag 7, so as to cover the entire inner bag 7. Then, in the same manner as the first inner bag, the second inner bag 7 that protrudes above the unfolding section 2 is folded back so that both ends face each other in the direction of the central axis while being aligned to the shape of the unfolding section 2. At this time, when putting on the second inner bag 7, the worker rotates the second inner bag 7 90 degrees relative to the first, using the evenly spaced support posts 4 as guides. The bottom of the second inner bag 7 is then folded back to fit the round shape of the unfolding section 2, and is folded carefully with both hands so that the folded portion of the first inner bag 7 does not overlap with the folded portion of the second inner bag 7 to be worked on next, creating unnecessary thickness. This second work also uses the circular unfolding section 2 outside the flexible container stand 5, so the worker can work quickly with both hands. Through this series of operations, an inner bag 7 having a double structure that is properly integrated with little unnecessary slack between the two is formed.

[0030] Next, the outermost round container bag 6 is placed over the container bag inner bag attachment device 1, which has been covered with the double inner bag 7 in this way, to cover the entire container bag inner bag attachment device 1 and the inner bag 7. At this time, since the bottom of the container bag 6 is circular, just like the unfolding section 2, the shapes of the two inner bags 7, which have already been neatly folded and arranged on the unfolding section 2, fit together without interfering with each other. In this state, the container bag inner bag attachment device 1 is positioned at the innermost position, and the container bag 6 encases the two inner bags 7 placed on top of the container bag inner bag attachment device 1, and is upside down compared to the normal arrangement.

[0031] Thereafter, the worker holds the legs 3 and supports 4 of the container bag inner bag attachment device 1, which has the two inner bags 7 and the container bag 6 overlapping each other, and moves it inside the flexible container stand 5. At this time, the worker places the container bag inner bag attachment device 1, together with the container bag 6 and double inner bag 7, inside the flexible container stand 5 from the side of the deployment section 2, which is the bottom of the container bag 6, or from above in Figure 1. Figure 3 illustrates the positional relationship between the container bag inner bag attachment device 1 and the flexible container stand 5 after placement. However, to make the respective positional relationships easier to understand, the container bag 6 and inner bag 7 are omitted and not shown in Figure 3.

[0032] This arrangement, including the container bag 6 and the inner bags 7, is shown in Fig. 4. This is a cross-sectional view illustrating the positional relationship between the container bag inner bag attachment device 1 and the flexible container stand 5 when the container bag 6 and two inner bags 7 are arranged inside the flexible container stand 5. In other words, this is a state in which the container bag inner bag attachment device 1 and the flexible container stand 5 in Fig. 3 are separated by a vertical plane. The container bag 6 and inner bag 7 are combined so as to be sandwiched between the outer flexible container stand 5 and the inner container bag attachment device 1, and are arranged with their top and bottom facing up. However, the container bag 6 and inner bag 7 are shown in a simplified manner, and the distance between them is also emphasized in the illustration so that their relative positions can be easily understood. The innermost part is the container bag inner bag attachment device 1, with its legs 3 facing upward. The top of the container bag 6 is open as an insertion port. Inside the container bag 6, there is a first inner bag 7, and a second inner bag 7 is also installed. A flexible container stand 5 that supports the container bag 6 is arranged to surround them.

[0033] The worker holds the legs 3 or the support posts 4 and gently shakes the unfolding part 2 to prevent it from getting tangled in the container bag 6 or inner bag 7, and removes only the container bag inner bag attachment device 1 from the flexible container stand 5. At this time, a peeling mechanism, such as a small, freely rotatable wheel, a mouse scroll wheel, or an extremely smooth, uneven surface, may be provided on the outer edge of the unfolding part 2 at the back of the inner bag 7 to dissolve tangling with the inner bag 7 and improve ease of removal. This peeling mechanism has the effect of reducing friction and untangling when the worker shakes the container bag inner bag attachment device 1 inside the inner bag 7. Finally, the worker expands and unfolds the inside of the inner bag 7 using an auxiliary tool or the like and gently adjusts its shape, so that the container bag 6 and the two inner bags 7 fit together more closely and are properly integrated, completing the placement work. When carrying out this expansion and deployment work, the container bag 6 and inner bag 7 have already been roughly adjusted in shape while being aligned with the outer shape of the container bag inner bag attachment device 1 outside the flexible container stand 5, so the finishing work performed by the worker using auxiliary tools can be kept to a minimum. At the same time, unexpected damage to the inner bag 7 by the auxiliary tools can be prevented, and the container bag 6 can be positioned safely and securely.

[0034] In the container bag inner bag attachment device 1 shown in Figure 1, the deployment section 2 and leg section 3 are annular, but they may also be disk-shaped. Also, even if they are formed into an annular shape using a hollow tube or a solid rod, their cross section is not limited to a circle, but may be elliptical or rectangular. The same applies to the support posts 4. In Figure 1, the support columns 4 are four, arranged equiangularly from the vertical central axis, and these also function as guides when folding the inner bag 7 using the unfolding section 2. For the first inner bag 7, both ends of the bottom part that protrudes above the unfolding section 2 are folded back toward the central axis of the unfolding section 2, using the two opposing support columns 4 as guides. Next, for the second inner bag 7, using the remaining two support columns 4 as guides, the two protruding parts are folded back toward the central axis so that both ends of the protruding parts face each other. Because one set of two opposing support columns 4 and another set of two opposing support columns 4 are perpendicular to each other, folding along each of them minimizes the overlap of the two inner bags 7 and ensures a smooth, even bottom.

[0035] FIG. 5 shows an example of an inner bag attaching device 1 for a container bag in which the deployment portion 2 and leg portions 3 are square and the virtual outer shape is a truncated pyramid. The unfolding section 2 is rectangular, and its corners and sides serve as markers when folding the inner bag 7. The unfolding section 2 also has multiple slits that serve as markers and also contribute to weight reduction. The legs 3 are rectangular, but are made from tubes with a square cross section, with reinforcing materials attached that connect the four corners diagonally. The four corners of the deployment section 2 and the leg section 3 are rounded to prevent damage to the inner bag 7. The support pillars 4 connect the vicinity of each vertex of the unfolding section 2 and the leg sections 3, but in order to ensure the strength of the container bag inner bag attachment device 1, it is also possible to add additional reinforcing material to the support pillars 4 between the unfolding section 2 and the leg sections 3. The form of the reinforcing material for the support pillars 4 can also be selected from a variety of forms, including the reinforcing material for the leg sections 3. [Explanation of symbols]

[0036] 1. Container bag inner bag attachment device 2 Development section 3 legs 4 pillars 5 Flexible container stand 6 Container Bag 7 Inner bag

Claims

1. An inner bag attachment device for a container bag, characterized in that a circular or disk-shaped expansion portion and a circular or disk-shaped leg portion share an imaginary vertical central axis and are connected in parallel by one or more supports, the expansion portion has a smaller diameter than the legs, and on a vertical plane around the vertical central axis, a set of line segments connecting the expansion portion and points on the outer periphery of the legs forms the appearance of an imaginary truncated cone.

2. An inner bag attachment device for a container bag, characterized in that a rectangular ring-shaped or rectangular plate-shaped unfolding portion and a rectangular ring-shaped or rectangular plate-shaped leg portion share an imaginary vertical central axis and are connected in parallel by one or more supports, the unfolding portion has a smaller diagonal length than the legs, and on a vertical plane around the vertical central axis, a set of line segments connecting the unfolding portion and points on the outer periphery of the legs form the appearance of an imaginary rectangular truncated pyramid.

3. 3. The inner bag attachment device for a container bag according to claim 1, wherein four long support pillars arranged equiangularly from the vertical central axis connect the deployment portion and the end of the leg portion.

4. 3. The inner bag attachment device for a container bag according to claim 1, further comprising an adjustment mechanism for adjusting at least one of the sizes of the deployment portion and the leg portion, or the length of the support pillar.

5. 3. The container bag inner bag attaching device according to claim 1, further comprising a peeling mechanism on the outer edge of the deployment portion.

Images