U-shaped flexible container

Abstract

The utility model discloses a U type packing bag, including packing bag, the middle part of packing bag bottom is provided with the discharge gate, the upper four corners of packing bag are provided with the bag rope, the outer periphery of packing bag is provided with a plurality of annular reinforcing strips from top to bottom, the outside of packing bag bottom is provided with the reinforcing bottom pad, the middle part of reinforcing bottom pad is provided with the hollow, the lower end of discharge gate passes through the hollow, the lower side of reinforcing bottom pad middle part is provided with the sheltering subassembly. The utility model discloses a U type packing bag, the magic tape nap surface of sheltering subassembly is fixed in reinforcing bottom pad bottom, and the magic tape hook surface is fixed in the sheltering pad and is flush with the edge of sheltering pad, and the adhesion of two can make the stable coverage of sheltering pad discharge gate, and the magic tape nap surface length is 2cm~5cm than magic tape hook surface long, can ensure that the sheltering pad completely sticks, effectively avoid the discharge gate and the rope of fastening discharge gate to be hooked by the external object, prevent the accidental opening of discharge gate or the damage of bag body.

Description

Technical Field

[0001] This utility model relates to the field of container bag technology, and in particular to a U-shaped container bag. Background Technology

[0002] U-shaped bulk bags, as flexible packaging containers commonly used in material storage and transportation, are widely used in industries such as chemicals, building materials, food, and mining due to their large capacity, light weight, and ease of bulk handling. They are primarily used for loading granular, powdery, or lumpy materials. Their core requirement is to achieve efficient loading and unloading of materials while ensuring sufficient structural stability during storage and handling to prevent bag damage or material leakage. This meets the practicality, safety, and durability requirements of packaging containers in industrial settings, making them an important auxiliary device connecting production, warehousing, and transportation.

[0003] When using U-shaped FIBCs, we found that most FIBCs only address the weight of materials by simply thickening the sidewall material or by localizing reinforcement. They do not specifically optimize for the difference in stress between the upper and lower parts of the bag (the lower part bears the overall weight of the material, while the upper part bears less stress). As a result, when handling or loading heavy materials, the lower sidewalls are prone to bulging and tearing due to concentrated pressure. Furthermore, the lack of an effective linkage reinforcement structure between the upper and lower parts of the bag means that the handling tension is concentrated in a localized area, further increasing the risk of bag breakage. In addition, the discharge port of existing FIBCs mostly relies on ropes for sealing, lacking additional protective structures. During transportation or storage, the ropes are easily snagged by external objects, causing the discharge port to open unexpectedly and materials to leak. This makes it difficult to meet the high requirements of industrial scenarios for the sealing of materials during storage and the safety of transportation. Utility Model Content

[0004] The main objective of this invention is to provide a U-shaped container bag that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a U-shaped container bag, comprising a container bag, a discharge port provided at the bottom center of the container bag, bag ropes provided at the four corners of the upper part of the container bag, a plurality of annular reinforcing strips provided from top to bottom on the outer periphery of the container bag, a reinforcing bottom pad provided on the outer side of the bottom of the container bag, a hole provided in the center of the reinforcing bottom pad, the lower end of the discharge port passing through the hole, and a shielding component provided on the lower side of the center of the reinforcing bottom pad; The masking assembly includes a hook and loop fastener, a hook and loop fastener, and a masking pad. One side of the hook and loop fastener is fixedly connected to the bottom of the reinforcing base pad, one side of the masking pad is fixedly connected to the lower part of the reinforcing base pad, and one side of the hook and loop fastener is fixedly connected to the side of the masking pad near the reinforcing base pad, with the hook and loop fastener and the edge of the masking pad being flush.

[0006] Preferably, the spacing between the plurality of annular reinforcing strips gradually decreases from top to bottom.

[0007] Preferably, the lower annular reinforcing strip is connected to the reinforcing base pad through multiple vertical reinforcing strips.

[0008] Preferably, the lower end of the bag rope extends downward and is fixedly connected to the reinforcing bottom pad, and the bag rope is connected to the outer periphery of the container bag and the annular reinforcing strip.

[0009] Preferably, the side length of the hook and loop fastener is 2cm to 5cm longer than the side length of the hook and loop fastener.

[0010] Preferably, the upper part of the container bag is provided with a bag cover on one side, and the other three sides of the bag cover are connected to the upper part of the container bag by zippers. The upper part of the container bag is provided with a skirt, and the skirt covers the zipper.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The outer perimeter of the bag is equipped with multiple annular reinforcing strips, with the spacing gradually decreasing from top to bottom. This design is specifically adapted to the greater stress characteristics of the material bearing the weight at the bottom, strengthening the sidewall's tensile and deformation resistance. The lower annular reinforcing strips are connected to the reinforcing pad at the bottom of the bag through multiple vertical reinforcing strips. At the same time, the lower end of the bag rope extends and is fixed to the reinforcing pad, and is connected to the outer perimeter of the bag and the annular reinforcing strips, forming a three-dimensional support system of "annular horizontal reinforcement + vertical connection + bag rope through fixation". This system can effectively distribute the pressure when loading materials and the tension during handling, avoiding excessive local stress that could lead to tearing or damage to the bag, and is suitable for the storage and transportation needs of heavier materials. The hook and loop side of the masking component is fixed to the bottom of the reinforcing base pad, and the hook and loop side is fixed to the masking pad and flush with the edge of the masking pad. The two are bonded together so that the masking pad can stably cover the feed opening. The hook and loop side is 2cm to 5cm longer than the hook and loop side, which can ensure that the masking pad fits completely and effectively prevent the feed opening and the rope that is tied to the feed opening from being caught by foreign objects, thus preventing the feed opening from being opened accidentally or the bag from being damaged. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a U-shaped container bag according to the present invention; Figure 2 This is a schematic diagram of the structure of a U-shaped container bag according to the present invention; Figure 3 This is a schematic diagram of the shielding component structure of a U-shaped container bag according to this utility model.

[0013] In the diagram: 1. FIBC (Flexible Intermediate Bulk Container); 2. Bag drawstring; 3. Bag cap; 4. Circular reinforcing strip; 5. Reinforcing bottom pad; 6. Vertical reinforcing strip; 7. Skirt; 8. Feed port; 9. Masking assembly; 901. Velcro surface; 902. Velcro hook surface; 903. Masking pad. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] like Figure 1-3 As shown, a U-shaped container bag includes a container bag 1, a discharge port 8 is provided at the bottom center of the container bag 1, bag ropes 2 are provided at the four corners of the upper part of the container bag 1, multiple annular reinforcing strips 4 are provided on the outer periphery of the container bag 1 from top to bottom, a reinforcing bottom pad 5 is provided on the outer bottom of the container bag 1, a hole is provided in the middle of the reinforcing bottom pad 5, the lower end of the discharge port 8 passes through the hole, and a shielding component 9 is provided on the lower side of the middle of the reinforcing bottom pad 5; The masking component 9 includes a hook and loop fastener 901, a hook and loop hook fastener 902, and a masking pad 903. One side of the hook and loop fastener 901 is fixedly connected to the bottom of the reinforcing base pad 5, one side of the masking pad 903 is fixedly connected to the lower part of the reinforcing base pad 5, and one side of the hook and loop hook fastener 902 is fixedly connected to the side of the masking pad 903 near the reinforcing base pad 5. The edges of the hook and loop fastener 902 and the masking pad 903 are flush. The masking component 9 is composed of three core components: the hook and loop fastener 901, the hook and loop hook fastener 902, and the masking pad 903. Each component is fixed around the reinforcing base pad 5 to form a synergistic protective function. One side of the hook and loop fastener 901 is directly fixed to the bottom of the reinforcing base pad 5, serving as a fixed base for component bonding; one side of the masking pad 903 is also fixedly connected to the lower part of the reinforcing base pad 5, and is located in the same area below the reinforcing base pad 5 as the hook and loop fastener 901, providing physical shielding for the feed port 8; one side of the hook and loop fastener 902 is fixedly connected to the surface of the masking pad 903 near the reinforcing base pad 5, and the edge of the hook and loop fastener 902 is flush with the edge of the masking pad 903, ensuring uniform force when the two are bonded together. At the same time, through the adhesion between the hook and loop fastener 902 and the hook and loop fastener 901, the masking pad 903 can stably cover the hole in the middle of the reinforcing base pad 5, thereby protecting the feed port 8 passing through the hole, preventing the feed port 8 or the rope used to fasten the feed port 8 from being snagged by foreign objects, and preventing the masking pad 903 from shifting or falling off.

[0016] Multiple annular reinforcing strips 4 are arranged in a ring-shaped structure, with the spacing gradually decreasing from top to bottom. Multiple strips are spaced along the outer circumference of the container bag 1 from top to bottom, and the spacing between adjacent strips follows a "wider at the top, narrower at the bottom" rule, meaning the closer to the bottom of the container bag 1, the smaller the spacing. The core purpose of this design is to adapt to the stress characteristics of the container bag 1 after it is filled with material. When material is added to the container bag 1, the weight of the material will exert downward pressure on the sidewalls of the bag, with the pressure gradually increasing from top to bottom. The lower part must bear the weight of the entire bag of material, while the upper part only bears the weight of the material in the upper portion. By reducing the spacing of the lower annular reinforcing strips 4, denser support points can be formed in the lower area where the pressure is greater, enhancing the sidewalls' tensile and deformation resistance and preventing the bag from bulging, tearing, or deforming due to concentrated pressure at the bottom. The relatively larger spacing at the top, while meeting the basic reinforcement requirements, reduces material usage, balancing practicality and economy.

[0017] The lower annular reinforcing strip 4 is connected to the reinforcing base pad 5 through multiple vertical reinforcing strips 6. The bag ropes 2 at the four corners of the upper part of the container bag 1 are connected to the outer periphery of the annular reinforcing strip 4. The annular reinforcing strip 4 can distribute the tension generated by the bag ropes 2 during handling to the side wall of the bag body, avoiding excessive local stress. On the other hand, the lower annular reinforcing strip 4 is connected to the reinforcing base pad 5 at the bottom of the container bag 1 through multiple vertical reinforcing strips 6, forming a three-dimensional reinforcement system of "annular horizontal reinforcement + vertical connection and fixation", which further improves the overall structural strength of the container bag 1, ensuring that it can stably bear the weight of materials during loading and handling, and reducing the risk of breakage.

[0018] The lower end of the bag rope 2 extends downward and is fixedly connected to the reinforcing bottom pad 5. The bag rope 2 is also connected to the outer periphery of the container bag 1 and the annular reinforcing strip 4. The installation of the bag rope 2 runs through the upper part, side wall and bottom of the container bag 1 to achieve full-dimensional fixation: First, the upper end of the bag rope 2 is set at the four corners of the upper part of the container bag 1, serving as the core force points for handling operations. It can be adapted to be hooked by hoisting equipment or manually lifted, providing a stable force application position for the movement of the container bag 1. Second, the lower end of the bag rope 2 extends downward and is directly fixedly connected to the reinforcing bottom pad 5 on the outer side of the bottom of the container bag 1, linking the force on the upper part of the bag body with the bottom bearing structure, avoiding the concentration of upper tension during handling, which could cause the bag body to detach from the bottom. Third, as the bag rope 2 extends downward from the upper part, it is not only fixed at both ends, but also connected to the side wall of the container bag 1 and the annular reinforcing strip 4 on the outer periphery. Through the combination with the side wall and the annular reinforcing strip 4, a distributed support point is formed on the outer side of the bag body.

[0019] The side length of the hook and loop fastener 901 is 2cm to 5cm longer than the side length of the hook and loop fastener 902. One side of the hook and loop fastener 901 is fixed to the bottom of the reinforcing base pad 5, and one side of the hook and loop fastener 902 is fixed to the side of the masking pad 903 near the reinforcing base pad 5. The hook and loop fastener are flush with the edge of the masking pad 903. When the masking pad 903 covers the central hole of the reinforcing base pad 5 by hook and loop fastener, the longer hook and loop fastener 901 can form "edge redundancy coverage" - the hook and loop fastener 902 is completely attached to the area of ​​the hook and loop fastener 901, and the 2cm to 5cm part of the hook and loop fastener 901 that extends beyond the hook and loop fastener 902 can cover the edge of the hook and loop fastener 902, preventing the edge of the hook and loop fastener 902 from being directly exposed.

[0020] A bag cover 3 is provided on one side of the upper part of the container bag 1. The other three sides of the bag cover 3 are connected to the upper part of the container bag 1 by zippers. A skirt 7 is provided on the upper part of the container bag 1, which covers the zipper. The bag cover 3 is assembled on one side of the upper part of the container bag 1, and adopts the connection method of "single-sided fixing and three-sided linkage" - one side of the bag cover 3 is directly fixed to the upper edge of the container bag 1, and the other three sides are connected to the corresponding upper edge of the container bag 1 by a zipper, forming a loading channel that can be flexibly opened and closed; while the skirt 7, as a matching protective structure, is directly set on the upper part of the container bag 1, and its coverage area precisely corresponds to the area where the zipper is located, which can completely cover the zipper, forming a dual structure of "zipper sealing + skirt protection".

[0021] Working principle: Before loading materials, ensure that the discharge port 8 at the bottom of the container bag 1 is tied tightly with a rope to prevent material leakage from the discharge port 8 during subsequent loading or transfer. Then, unzip the top cover 3 of the container bag 1 and load the materials into the top opening of the container bag 1. After loading, zip up the zipper and close the cover 3. The skirt 7 at the top of the container bag 1 will cover the zipper to prevent external wear or material leakage. During handling, the container bag 1 is hoisted or lifted using the bag ropes 2 at the four corners of the top. The lower end of the bag ropes 2 is fixedly connected to the reinforcing bottom pad 5 and to the outer periphery of the container bag 1 and the annular reinforcing strips 4, which can distribute the tension. At the same time, the multiple annular reinforcing strips 4 with gradually decreasing spacing from top to bottom on the outer periphery of the container bag 1, as well as the vertical reinforcing strips 6 between the lower annular reinforcing strips 4 and the reinforcing bottom pad 5, together enhance the overall structural strength of the container bag 1 and prevent it from deforming or breaking due to the weight of the materials. The reinforcing bottom pad 5 can also protect the bottom of the container bag 1 from ground friction damage. During this process, the shielding component 9 fixed to the lower part of the container bag 1 can protect the discharge port 8 and the rope securing the discharge port 8, preventing them from being hooked by other objects and causing damage to the bag or accidental opening of the discharge port 8. Furthermore, since the side length of the hook and loop fastener 901 is 2cm to 5cm longer than the hook and loop fastener 902, when the shielding pad 903 is attached to the lower part of the reinforcing base pad 5 via the hook and loop fastener 902, the shielding pad 903 can be completely attached, effectively preventing itself from being hooked by other objects. When unloading materials, first separate the hook and loop fastener 902 from the hook and loop fastener 901 to lift the shielding pad 903, then untie the rope securing the discharge port 8, allowing the materials to flow out from the discharge port 8. After unloading, re-tighten the discharge port 8 and attach the hook and loop fastener 902 to the hook and loop fastener 901, so that the shielding pad 903 covers the discharge port 8 again.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A U-shaped container bag, comprising a container bag (1), characterized in that: The container bag (1) has a discharge port (8) at the bottom center, bag ropes (2) at the four corners of the upper part of the container bag (1), multiple annular reinforcing strips (4) on the outer periphery of the container bag (1) from top to bottom, a reinforcing bottom pad (5) on the outer side of the bottom of the container bag (1), a hole in the middle of the reinforcing bottom pad (5), the lower end of the discharge port (8) passes through the hole, and a shielding component (9) is provided on the lower side of the middle of the reinforcing bottom pad (5). The masking component (9) includes a hook and loop side (901), a hook and loop side (902), and a masking pad (903). One side of the hook and loop side (901) is fixedly connected to the bottom of the reinforcing base pad (5), one side of the masking pad (903) is fixedly connected to the lower part of the reinforcing base pad (5), and one side of the hook and loop side (902) is fixedly connected to the side of the masking pad (903) near the reinforcing base pad (5). The edges of the hook and loop side (902) and the masking pad (903) are flush.

2. A U-shaped container bag according to claim 1, characterized in that: The spacing between the multiple annular reinforcing strips (4) gradually decreases from top to bottom.

3. A U-shaped container bag according to claim 1, characterized in that: The lower annular reinforcing strip (4) is connected to the reinforcing base pad (5) through multiple vertical reinforcing strips (6).

4. A U-shaped container bag according to claim 1, characterized in that: The lower end of the bag rope (2) extends downward and is fixedly connected to the reinforcing bottom pad (5), and the bag rope (2) is connected to the outer periphery of the container bag (1) and the annular reinforcing strip (4).

5. A U-shaped container bag according to claim 1, characterized in that: The side length of the hook and loop fastener (901) is 2cm to 5cm longer than the side length of the hook and loop fastener (902).

6. A U-shaped container bag according to claim 4, characterized in that: The container bag (1) has a bag cover (3) on one side of its upper part. The other three sides of the bag cover (3) are connected to the upper part of the container bag (1) by zippers. The container bag (1) has a skirt (7) on its upper part, which covers the zipper.

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