TWI844301B - Bulk bag - Google Patents

Abstract

A bulk bag is provided, including: an outer bag; an inner bag, disposed in the outer bag; and at least one connecting member, the at least one connecting member disposed in the outer bag, the at least one connecting member including a first joint portion and a second joint portion, the first joint portion sewed on the outer bag, the second joint portion adhered the inner bag by an adhesive layer.

Description

Space Bag

The present invention relates to a container for aggregates for storage or transportation, and in particular to a space bag.

Space bags, also known as ton bags or flexible container bags, are often used to hold bulk powder materials, such as plastic granular materials, cement powder, etc. They can be used with cranes and have the advantages of large volume, light weight, and convenient loading and unloading. Generally, a suction pipe of a negative pressure suction device is inserted into the interior of the space bag to suck the powder material from the interior of the space bag to the material point through negative pressure.

The known space bag includes an outer bag and an inner bag, the outer bag is placed inside the inner bag, and the powder material is stored in the inner bag. However, because the inner bag and the outer bag are separated (not connected) and the outer bag is breathable, the suction tube will be adsorbed to the contracted inner bag during the process of absorbing the powder material, causing the suction tube to be unable to absorb the powder material and interrupt the suction.

In addition, in order to prevent the inner bag from being sucked into the suction tube, conventional techniques first spray a large amount of colloid over a large area and a certain thickness on the inner wall of the outer bag to combine the colloid with the inner bag. However, the method of spraying colloid has the disadvantages of high cost and difficulty in manufacturing.

Therefore, it is necessary to provide a novel and advanced space bag to solve the above problems.

The main purpose of the present invention is to provide a space bag that can effectively prevent an inner bag from being sucked into a suction tube, and is easy to process and low in cost.

To achieve the above-mentioned purpose, the present invention provides a space bag, which includes: an outer bag; an inner bag, which is accommodated in the outer bag; and at least one connecting member, which is accommodated in the outer bag, and the at least one connecting member includes a first joint part and a second joint part, the first joint part is sewn to the outer bag, and the second joint part is bonded to the inner bag with an adhesive layer; wherein the outer bag includes a plurality of corners, the plurality of corners are arranged at intervals along a circumference, and the at least one connecting member is sewn between two adjacent corners.

1,1’: Space bag

10: Outer bag

11: Corner

12: Third weaving line

13: Fourth weaving line

14: Top

15: Bottom

16: Wall

20: Inner pocket

30: Connecting components

31: First joint

32: Second joint

33: First weaving line

34: Second weaving line

35: Reflected end

40: Adhesive layer

50:Piercing

60: Handle

70: Sewing line

80:Sewing thread

2: Center axis

3: Circumferential direction

4: First direction

5: Suction pipe

Figure 1 is a three-dimensional diagram of a first preferred embodiment of the present invention.

Figure 2 is a disassembled diagram of a first preferred embodiment of the present invention.

Figure 2A is a partial enlarged view of Figure 2.

Figure 3 is a front view of a first preferred embodiment of the present invention.

Figure 4 is a cross-sectional view of the A-A line segment of Figure 3.

Figure 5 is a schematic diagram of the inner bag being collapsed in a first preferred embodiment of the present invention.

Figure 6 shows the usage status of the first preferred embodiment of the present invention.

Figure 7 is a cross-sectional view of an outer bag of a first preferred embodiment of the present invention.

Figure 8 is a cross-sectional view of a connecting component of a first preferred embodiment of the present invention.

Figure 9 is a schematic diagram of a second preferred embodiment of the present invention.

The following examples are only used to illustrate possible implementations of the present invention, but they are not intended to limit the scope of protection of the present invention. The "one" or "at least one" before the terms mentioned in the text does not limit the quantity. It can also be "plural" according to needs. This change in quantity is also within the scope of protection, which should be explained first.

Please refer to Figures 1 to 8 and Figure 2A, which show a first preferred embodiment of the present invention. The space bag 1 of the present invention includes an outer bag 10 and an inner bag 20.

The inner bag 20 is accommodated in the outer bag 10; the at least one connecting member 30 is accommodated in the outer bag 10, and the at least one connecting member 30 includes a first joint portion 31 and a second joint portion 32, the first joint portion 31 is sewn to the outer bag 10, and the second joint portion 32 is bonded to the inner bag 20 by an adhesive layer 40. In this way, a firm bonding relationship can be ensured between the inner bag 20 and the outer bag 10, and further, the inner bag 20 can be effectively prevented from being sucked into a suction pipe 5; at the same time, it has the advantages of easy processing and low cost, and the bonding strength between each connecting member 30 and the outer bag 10 and the inner bag 20 can be greatly improved.

The inner bag 20 is made of polyethylene (PE) material. The outer bag 10 and the inner bag 20 are made of different materials. The inner bag 20 can hold fluid materials such as granular materials, powdered materials, cement powder, etc. The inner bag 20 shrinks and deforms due to negative pressure generated inside.

The outer bag 10 includes a plurality of corners 11, which are arranged at intervals of 3 along a circumferential direction, and the at least one connecting member 30 is sewn between two adjacent corners 11. The outer bag 10 includes a plurality of walls 16, and two adjacent walls 16 are partially sewn together to form the above-mentioned corners 11. Preferably, the space bag 1 includes a plurality of connecting members 30, and the first joint portion 31 of at least one connecting member 30 is arranged at one corner 11 and is located between two adjacent walls 16 and sewn together (in the same sewing process), and another connecting member 30 is sewn between one wall 16 and two adjacent corners 11 (e.g., with a sewing line 80). Specifically, the plurality of connecting members 30 are sewn to the inner wall of the outer bag 10 at intervals along the circumferential direction. Therefore, the inner bag 20 can be pulled in a wide range and multiple angles to avoid being sucked into the suction port of the suction pipe 5. The space bag 1 also includes a plurality of handles 60, and the two ends of each of the handles 60 are arranged at the two corners 11 and are sewn together with the two adjacent wall portions 16 and the first joint portion 31 of at least one connecting member 30 (the same sewing process). Therefore, only one sewing process is required to sew the first joint portion 31 of the at least one connecting member 30, the handle 60, and the two wall portions 16 at the same time, so the processing procedures are few. Furthermore, the inner bag 20 can be pulled in a wide range and multiple directions to avoid being sucked into the suction port of the suction pipe 5.

The outer bag 10 and the inner bag 20 jointly form a through hole 50, which is connected to the inside of the inner bag 20. The through hole 50 defines a central axis 2, and the circumference 3 extends around the central axis 2. The through hole 50 allows the suction tube 5 to penetrate into the inner bag 20.

The adhesive layer 40 is a double-sided adhesive, and one side of the second joint portion 32 and the outer wall of the inner bag 20 are respectively bonded to the opposite sides of the double-sided adhesive; accordingly, the double-sided adhesive only needs to be bonded to the at least one connecting member 30 and then bonded to the outer wall of the inner bag 20 to achieve the bonding effect, so the processing is easy, the thickness of the double-sided adhesive is thin and the cost is low.

Each of the connecting components 30 is a woven sheet, and each of the connecting components 30 includes a plurality of first weaving threads 33 and a plurality of second weaving threads 34. The plurality of first weaving threads 33 and the plurality of second weaving threads 34 are interwoven (in longitude and latitude) to form the second joining portion 32 (and the first joining portion 31). One side of the plurality of first weaving threads 33 and one side of the plurality of second weaving threads 34 are bonded to one side of the adhesive layer 40. The outer bag 10 is a woven bag, and the outer bag 10 includes a plurality of third braiding threads 12 and a plurality of fourth braiding threads 13. The plurality of third braiding threads 12 and the plurality of fourth braiding threads 13 are interwoven with each other (in longitude and latitude). The denier number of each third braiding thread 12 and the denier number of each fourth braiding thread 13 are respectively greater than the denier number of each first braiding thread 33 and the denier number of each second braiding thread 34. Therefore, each of the connecting components 30 is light in weight, and the height difference at the intersection of the first weaving thread 33 and the second weaving thread 34 is small, so that each of the connecting components 30 presents a flat surface and can be firmly bonded with the adhesive layer 40. Moreover, a small amount of the adhesive layer 40 has a high fastening force (as shown in FIG. 8), and the height difference at the intersection of the third weaving thread 12 and the fourth weaving thread 13 is large and thick, so the structure has high strength and pores (as shown in FIG. 7). In this embodiment, each of the first braiding threads 33, each of the second braiding threads 34, each of the third braiding threads 12, and each of the fourth braiding threads 13 are braided strip structures made of polypropylene (PP) material.

A folded end portion 35 of each connecting member 30 is folded toward a side of each connecting member 30 to form the first joint portion 31, and the first joint portion 31 and the outer bag 10 are sewn with at least one sewing line 70. Specifically, the first joint portion 31 is not easily subjected to tension to cause the end to be frayed and produce many frayed lines, so the bonding strength is high. The outer bag 10 includes a top portion 14 and a bottom portion 15, the top portion 14 and the bottom portion 15 are located in a first direction 4, and each sewing line 70 extends along the first direction 4; the outer bag 10 and the inner bag 20 are sewn to each other at the adjacent perforations 50.

The second joint portion 32 of each connecting member 30 can be swung relative to the outer bag 10 with the first joint portion 31 as a swing center (as shown in FIG5 ); that is, the second joint portion 32 of each connecting member 30 is a free end. Thus, when the inner part of the inner bag 20 is contracted by suction (negative pressure), the second joint portion 32 of each connecting member 30 can disperse the tension along with the swing; in addition, each connecting member 30 can be swung during the process of installing the inner bag 20 on the outer bag 10 and bonding each connecting member 30 to the outer wall of the inner bag 20 with the adhesive layer 40 to facilitate installation.

Specifically, the space bag 1 is slightly rectangular, and includes six surfaces, namely, the four walls 16, the top 14, and the bottom 15. Since at least one of the connecting components 30 is sewn to one of the walls 16 near the middle of the space bag 1, as shown in FIG6, at least one of the connecting components 30 corresponds to the through hole 50 and is near the central axis 2. In this way, when the suction tube 5 is inserted into the inner bag 20 from the through hole 50 to suck the material, each of the connecting components 30 can be positioned to pull and stretch the inner bag 20 to resist the suction force of the suction tube 5. Even if the suction force near the suction tube 5 is strong, there is no need to worry about the inner bag 20 being excessively deformed and being sucked into the suction tube 5, resulting in interruption of suction. Preferably, at least one of the connecting members 30 is sewn to at least one of the corners 11 and is circumferentially spaced apart from another of the connecting members 30, so that the plurality of connecting members 30 can position and support the inner bag 20 from the outer periphery of the inner bag 20 to prevent the suction tube 5 from sucking the inner bag 20 surrounding it. In addition, each of the connecting members 30 sewn to each of the corners 11 can be sewn together with the two adjacent wall portions 16 at one time to simplify the processing steps. In addition, the sewing process can greatly increase the bonding strength between each connecting member 30 and the outer bag 10, thereby providing a stable supporting force to the inner bag 20. At least two connecting members 30 are used to connect the outer bag 10 and the inner bag 20, and a small amount of thin adhesive layer 40 can be used to improve the bonding strength between the outer bag 10 and the inner bag 20, thereby greatly reducing costs.

Please refer to Figure 9, which shows a second preferred embodiment of the present invention, wherein at least two connecting members 30 of the space bag 1' are arranged at intervals along the circumferential direction 3 and sewn to the same wall portion 16. In this embodiment, the at least two connecting members 30 are arranged at intervals along the circumferential direction and both correspond to the through hole 50 and are located on opposite sides of the central axis 2.

When in use, when the suction tube penetrates through the through hole 50 to suck the material, the at least two connecting components 30 can disperse the suction force and pull the same side of the inner bag to stretch one side of the inner bag, and there is no need to worry that the inner bag will be sucked in by the strong suction of the suction tube.

In summary, the space bag of the present invention is sewn to the outer bag by the at least one connecting member, and the at least one connecting member is bonded to the inner bag by the adhesive layer; thereby, the inner bag can be effectively prevented from being sucked into the suction tube; and it has the advantages of easy processing, low cost, and high bonding strength between each connecting member and the outer bag and the inner bag.

1: Space bag

16: Wall

20: Inner pocket

30: Connecting components

40: Adhesive layer

70: Sewing line

Claims (9)

A space bag comprises: an outer bag; an inner bag contained in the outer bag; and at least one connecting member contained in the outer bag, the at least one connecting member comprising a first joint portion and a second joint portion, the first joint portion being sewn to the outer bag, and the second joint portion being bonded to the inner bag by an adhesive layer; wherein the outer bag comprises a plurality of corners, the plurality of corners being arranged at intervals along a circumference, and the at least one connecting member being sewn between two adjacent corners. As described in claim 1, the outer bag includes a plurality of wall portions, two adjacent wall portions are partially sewn together to form a corner, the space bag includes a plurality of connecting components, the first joint portion of at least one connecting component is located at a corner and is sewn between the two adjacent wall portions, and another connecting component is sewn between the two adjacent corners. As described in claim 1, the outer bag includes a plurality of wall portions, two adjacent wall portions are partially sewn together to form a corner, and the space bag includes a plurality of connecting components, at least two of which are spaced apart along the circumference and sewn to the same wall portion. As described in claim 1, the adhesive layer is a double-sided adhesive, and one side of the second joint portion and the outer wall of the inner bag are respectively bonded to the opposite sides of the double-sided adhesive. As described in any one of claims 1 to 4, each of the connecting components is a woven sheet, each of the connecting components includes a plurality of first weaving threads and a plurality of second weaving threads, the plurality of first weaving threads and the plurality of second weaving threads are interwoven to form the second joint, and one side of the plurality of first weaving threads and one side of the plurality of second weaving threads are bonded to one side of the adhesive layer. As described in claim 5, the outer bag is a woven bag, the outer bag includes a plurality of third weaving threads and a plurality of fourth weaving threads, the plurality of third weaving threads and the plurality of fourth weaving threads are interwoven with each other, and the denier number of each third weaving thread and the denier number of each fourth weaving thread are respectively greater than the denier number of each first weaving thread and the denier number of each second weaving thread. As described in claim 5, the space bag, wherein one folded end of each connecting member is folded back toward one side of each connecting member to form the first joint portion, and the first joint portion and the outer bag are sewn together with at least one sewing line. As described in claim 1, the inner bag is made of polyethylene (PE) material, and the outer bag and the inner bag are made of different materials. The space bag as claimed in claim 2, wherein the outer bag and the inner bag jointly form a perforation, the perforation is connected to the interior of the inner bag, the perforation defines a central axis, and the circumference extends around the central axis; the space bag further comprises a plurality of handles, the two ends of each of the handles are arranged at the two corners and are sewn together with the two adjacent wall portions and the first joint portion of at least one of the connecting components; the adhesive layer is a double-sided adhesive, and one side of the second joint portion is separated from the outer wall of the inner bag by a side surface. The second joint portion of each connecting member can be swung relative to the outer bag with the first joint portion as a swing center; each connecting member is a woven sheet, each connecting member includes a plurality of first woven threads and a plurality of second woven threads, the plurality of first woven threads and the plurality of second woven threads are interwoven to form the second joint portion, one side of the plurality of first woven threads and one side of the plurality of second woven threads are bonded to the adhesive The outer bag is a woven bag, comprising a plurality of third woven threads and a plurality of fourth woven threads, the plurality of third woven threads and the plurality of fourth woven threads are interwoven with each other, the denier of each third woven thread and the denier of each fourth woven thread are respectively greater than the denier of each first woven thread and the denier of each second woven thread; each first woven thread, each second woven thread, each third woven thread, each fourth woven thread is respectively polypropylene. The woven strip structure is made of polypropylene (PP) material; one end of each connecting member is folded toward one side of each connecting member to form the first joint portion, and the first joint portion and the outer bag are sewn with at least one sewing line; the outer bag includes a top and a bottom, the top and the bottom are located in a first direction, and each sewing line extends along the first direction; the outer bag and the inner bag are sewn to each other at the adjacent perforations.