Flexible freight bag sewing device

Abstract

The invention relates to the technical field of flexible freight bag production, and particularly discloses a flexible freight bag sewing device which comprises a guide rail horizontally arranged on the ground, a sewing machine arranged at one end of the guide rail, a sliding base arranged on the guide rail in a sliding mode, a rotating shaft horizontally and rotatably arranged on the sliding base, a driving device used for driving the rotating shaft to rotate and a fixing block connected with the end of the rotating shaft. The bag opening devices are uniformly distributed on the side wall of the fixed block; the bag opening device comprises a first telescopic cylinder connected with the fixing block, an arc-shaped supporting plate arranged at the movable end of the first telescopic cylinder, an arc-shaped negative pressure plate arranged at the movable end of the first telescopic cylinder, and a negative pressure device. The negative pressure plate is of a hollow structure and is provided with a plurality of negative pressure holes in the outer side, and the negative pressure device communicates with the interior of the negative pressure plate. A gap is formed between every two adjacent supporting plates. According to the flexible freight bag sewing device, the sewing efficiency of the double-layer flexible freight bag can be efficiently improved, and the automation degree of the sewing process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of container bag production, and in particular to a container bag sewing device. Background Art

[0002] In the industrial sector, bulk bags play a vital role as key packaging for holding and transferring materials. They are large in size and, when filled, often assume a cylindrical or cubic shape. Common bulk bags are typically made by sewing sheets of woven bags. When materials with high sealing requirements, such as extremely fine powders, are to be contained, a polymer film inner bag is placed inside the woven outer bag to prevent leakage. The outer and inner bags are then sewn together at their openings, a process typically performed using a sewing machine.

[0003] However, the inherent bulk of bulk bags presents numerous challenges for manual sewing. On the one hand, the manual process is cumbersome, labor-intensive, and time-consuming. On the other hand, manual positioning is difficult to precisely control, prone to deviations and resulting in overall low sewing efficiency. Therefore, the development of a more efficient sewing device for double-layer bulk bags is urgently needed, which would significantly improve the production efficiency and quality of bulk bags. Summary of the Invention

[0004] The object of the present invention is to provide a container bag sewing device, which can effectively improve the sewing efficiency of double-layer container bags and improve the degree of automation of the sewing process.

[0005] The present invention is achieved through the following technical solutions: the container bag sewing device of the present invention includes a guide rail horizontally arranged on the ground, a sewing machine arranged at one end of the guide rail, a slide slidably arranged on the guide rail, a rotating shaft horizontally and rotatably arranged on the slide, a driving device for driving the rotating shaft to rotate, a fixed block connected to the end of the rotating shaft, and a plurality of bag-stretching devices evenly distributed on the side wall of the fixed block; the bag-stretching device includes a first telescopic cylinder connected to the fixed block, an arc-shaped support plate and an arc-shaped negative pressure plate arranged at the movable end of the first telescopic cylinder, and a negative pressure device; the negative pressure plate is a hollow structure and has a plurality of negative pressure holes on the outside, and the negative pressure device is connected to the inside of the negative pressure plate; the axial direction of the rotating shaft is perpendicular to the axial direction of the first telescopic cylinder, the plurality of support plates are located on the same circumference, the axial direction of the rotating shaft is perpendicular to the plane where the plurality of support plates are located, and there is a gap between adjacent support plates.

[0006] Furthermore, a pair of support plates is provided in one of the bag-supporting devices. The pair of support plates are parallel to each other and are respectively provided on two opposite sides of the first telescopic cylinder; the negative pressure plate is provided between the pair of support plates.

[0007] Furthermore, one end of the support plate is connected to the first telescopic cylinder, and the thickness of the support plate at one end close to the first telescopic cylinder is greater than the thickness of the other end opposite thereto.

[0008] Furthermore, one end of a pair of support plates close to the first telescopic cylinder is fixedly connected via a first connecting shaft, and a movable end of the first telescopic cylinder is connected to the first connecting shaft.

[0009] Furthermore, the movable end of the first telescopic cylinder is hinged to the first connecting shaft, and the ends of a pair of support plates away from the first connecting shaft are fixedly connected by a second connecting shaft; the bag-holding device also includes a second telescopic cylinder; the cylinder body of the second telescopic cylinder is hinged to the cylinder body of the first telescopic cylinder, and the movable end of the second telescopic cylinder is hinged to the second connecting shaft.

[0010] Furthermore, the first telescopic cylinder and the second telescopic cylinder are both one of a pneumatic cylinder, an electric push rod, and a hydraulic cylinder.

[0011] Furthermore, the slide includes a base slidably connected to the guide rail, and a support column vertically arranged on the base; the rotating shaft is rotatably connected to the support column; the driving device includes a rotating motor connected to the rotating shaft; the rotating motor is fixed on the support column.

[0012] Furthermore, a linear motor is provided in the base, and the linear motor is used to drive the base to move along the guide rail.

[0013] Furthermore, the negative pressure device includes a negative pressure tube connected to the interior of the negative pressure plate, and a negative pressure machine connected to the negative pressure tube.

[0014] Furthermore, the outer wall of the support plate and the outer wall of the negative pressure plate are both provided with a rubber layer.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: When in use, the container bag sewing device of the present invention pulls the support plate and the negative pressure plate close to the fixed block through the synchronous action of multiple first telescopic cylinders, so that the support plate then puts the opening of the polymer inner bag with a sealing function on the outside of the support plate, and makes the opening side of the inner bag protrude from the support plate (that is, the protruding part is close to the sewing machine), and then starts the negative pressure device to generate negative pressure in the negative pressure plate, which sucks the inner bag by the negative pressure. After the inner bag is sucked, the support plate and the negative pressure plate are stretched apart by the first telescopic cylinder, thereby completing the stretching of the inner bag. After the stretching, the support plate is pulled back by the first telescopic cylinder to reduce the opening of the inner bag (the effect of first stretching and then shrinking is to enable the negative pressure plate to be sucked to the correct position on the inner bag), and then the outer bag is put on the inner bag, and the opening side of the outer end is flush with the opening side of the inner bag (or separated by a certain distance), and then the support plate and the negative pressure plate are stretched apart by the first telescopic cylinder, and the inner bag and the outer bag are stretched apart at the same time. During the stretching process, the position of the outer bag can be manually adjusted gradually. After fully expanding, the outer and inner bags are sent to the sewing machine via the slide, where they are snapped into place. The drive unit then drives the fixed block to rotate, which in turn drives the inner and outer bags to rotate. During this rotation, the sewing machine sews the inner and outer bags together. After sewing is complete, the bulk bag is removed and the above operation is repeated. This allows the inner and outer bags to be sewn together very efficiently and precisely for large-diameter bulk bags, effectively improving sewing precision and quality, reducing the intensity of manual repetitive labor, and increasing sewing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a container bag sewing device provided by an embodiment of the present invention in one state during use;

[0017] Figure 2 A schematic diagram of the structure of the container bag sewing device provided by an embodiment of the present invention in two states when in use;

[0018] Figure 3 A schematic diagram of the structure of the container bag sewing device provided by an embodiment of the present invention in three states when in use;

[0019] Figure 4 A schematic structural diagram of a bag-supporting device according to an embodiment of the present invention in one state and from one perspective;

[0020] Figure 5 A schematic structural diagram of a bag-supporting device according to an embodiment of the present invention in one state from two perspectives;

[0021] Figure 6 A schematic structural diagram of a bag-supporting device according to an embodiment of the present invention in two states from one perspective;

[0022] Figure 7A schematic structural diagram of a bag-supporting device according to an embodiment of the present invention in two states and from two perspectives;

[0023] Figure 8 A schematic structural diagram of a first telescopic cylinder portion from one perspective provided in an embodiment of the present invention;

[0024] Figure 9 A schematic structural diagram of a first telescopic cylinder portion from two perspectives provided in an embodiment of the present invention;

[0025] Figure 10 A schematic structural diagram of the negative pressure plate portion provided in an embodiment of the present invention;

[0026] Figure 11 A schematic structural diagram of the support plate portion provided in an embodiment of the present invention.

[0027] Icons: 11-guide rail, 12-sewing machine, 13-slide, 131-base, 132-support column, 14-rotating motor, 15-rotating shaft, 16-fixed block, 20-bag supporting device, 21-first telescopic cylinder, 22-support plate, 23-negative pressure plate, 24-negative pressure hole, 25-negative pressure tube, 26-first connecting shaft, 27-second connecting shaft, 28-second telescopic cylinder, 31-inner bag, 32-outer bag. DETAILED DESCRIPTION

[0028] Example

[0029] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 11As shown, the container bag sewing device of this embodiment includes a guide rail 11 horizontally arranged on the ground, a sewing machine 12 disposed at one end of the guide rail 11, a slide 13 slidably mounted on the guide rail 11, a rotating shaft 15 horizontally and rotatably mounted on the slide 13, a driving device for driving the rotating shaft 15 to rotate, a fixed block 16 connected to the end of the rotating shaft 15, and a plurality of bag-opening devices 20 evenly distributed on the side walls of the fixed block 16. The bag-opening device 20 includes a first telescopic cylinder 21 connected to the fixed block 16, an arcuate support plate 22 and an arcuate negative pressure plate 23 disposed at the movable end of the first telescopic cylinder 21, and a negative pressure device. The negative pressure plate 23 is a hollow structure with a plurality of negative pressure holes 24 formed on the outer side. The negative pressure device is connected to the interior of the negative pressure plate 23. The axial direction of the rotating shaft 15 is perpendicular to the axial direction of the first telescopic cylinder 21. The plurality of support plates 22 are located on the same circumference. The axial direction of the rotating shaft 15 is perpendicular to the plane of the plurality of support plates 22. Gaps are provided between adjacent support plates 22. The support plate 22 and the negative pressure plate 23 are pulled apart by the first telescopic cylinders 21 to close the fixed block 16, so that the support plate 22 can then cover the opening of the polymer inner bag 31 with a sealing function on the outside of the support plate 22, and make the opening side of the inner bag 31 protrude from the support plate 22 (that is, the protruding part is close to the sewing machine 12). Then, the negative pressure device is started to generate negative pressure in the negative pressure plate 23, and the inner bag 31 is sucked by the negative pressure. After the inner bag 31 is sucked, the support plate 22 and the negative pressure plate 23 are stretched apart by the first telescopic cylinder 21, so that the inner bag 31 is completely stretched apart. After stretching, the support plate 22 is pulled back by the first telescopic cylinder 21 to shrink the opening of the inner bag 31 (the purpose of stretching first and then shrinking is to enable the negative pressure plate 23 to be sucked to the correct position on the inner bag 31). Then, the outer bag 32 is put on the inner bag 31 (as shown in the attached figure). Figure 1 -Attached Figure 2 As shown), the outer end opening is flush with the inner bag 31 opening (or separated by a certain distance), and then the first telescopic cylinder 21 is used to expand the support plate 22 and the negative pressure plate 23, and at the same time expand the inner bag 31 and the outer bag 32. During the expansion process, the position of the outer bag 32 can be manually adjusted gradually. After being fully expanded, the outer bag 32 and the inner bag 31 are sent to the sewing machine 12 by the slide 13, so that the outer bag 32 and the inner bag 31 are clamped in the sewing machine 12 (as shown in the attached figure). Figure 3 As shown, the driving device drives the fixed block 16 to rotate, thereby driving the inner bag 31 and the outer bag 32 to rotate. During the rotation process, the inner bag 31 and the outer bag 32 are sewn together by the sewing machine 12. After sewing is completed, the container bag is removed and the above operation is repeated. In this way, the inner bag 31 and the outer bag 32 can be sewn together very efficiently and accurately for large-diameter container bags, effectively improving the sewing precision and quality, reducing the intensity of manual repetitive labor, and improving sewing efficiency.

[0030] In this embodiment, a bag-supporting device 20 is provided with a pair of support plates 22, which are parallel to each other and disposed on opposite sides of a first telescopic cylinder 21. A negative pressure plate 23 is disposed between the pair of support plates 22. Specifically, the two support plates 22 are arranged on either side of the negative pressure plate 23. This allows the negative pressure plate 23 to better hold the inner bag 31, and the contact area between the support plates 22 and the inner bag 31 is increased, making it less likely to damage the inner bag 31.

[0031] In this embodiment, one end of the support plate 22 is connected to the first telescopic cylinder 21. The thickness of the support plate 22 at the end closest to the first telescopic cylinder 21 is greater than the thickness at the opposite end. Specifically, this effectively reduces the weight of the support plate 22, thereby reducing the overall weight of the device and the load on the device during operation. Furthermore, the support plate 22 can be hollow or porous to further reduce weight, or made of a high-hardness polymer material.

[0032] In this embodiment, a pair of support plates 22 are fixedly connected at one end close to the first telescopic cylinder 21 by a first connecting shaft 26, and the movable end of the first telescopic cylinder 21 is connected to the first connecting shaft 26. The movable end of the first telescopic cylinder 21 is hinged to the first connecting shaft 26, and the end of the pair of support plates 22 away from the first connecting shaft 26 is fixedly connected by a second connecting shaft 27; the bag-holding device 20 also includes a second telescopic cylinder 28; the cylinder body of the second telescopic cylinder 28 is hinged to the cylinder body of the first telescopic cylinder 21, and the movable end of the second telescopic cylinder 28 is hinged to the second connecting shaft 27. Specifically, by pulling the support plate 22 and the negative pressure plate 23 close to the fixed block 16 by the first telescopic cylinder 21, the outer diameter enclosed by the support plate 22 can be reduced, so that the inner bag 31 and the outer bag 32 can be put on more easily. In addition, a second telescopic cylinder 28 is provided for driving the support plate 22 to rotate around the first connecting shaft 26. Through the second telescopic cylinder 28, the support plate 22 can be further retracted and close to the fixed block 16 (as shown in the attached figure). Figure 6 -Attached Figure 7 As shown, the length of the negative pressure plate 23 is significantly shorter than the length of the support plate 22, and is optimally half the length of the support plate 22). When the support plate 22 rotates toward the fixed block 16 under the pull of the second telescopic cylinder 28, the diameter enclosed by the support plate 22 becomes smaller, and the inner bag 31 and the outer bag 32 can be put on more easily, which is especially convenient for manually putting on the inner bag 31 and the outer bag 32 of extra-large diameter. It should be noted that during the contraction action, the second telescopic cylinder 28 needs to be triggered first, so that the support plate 22 rotates a certain angle around the first connecting shaft 26, and then the first telescopic cylinder 21 is triggered again to pull the support plate 22 to move. The negative pressure plate 23 is fixedly connected to the movable end of the first telescopic cylinder 21.

[0033] In this embodiment, the first telescopic cylinder 21 and the second telescopic cylinder 28 are both selected from the group consisting of a pneumatic cylinder, an electric push rod, and a hydraulic cylinder.

[0034] In this embodiment, the slide 13 includes a base 131 slidably connected to the guide rail 11, and a support column 132 vertically mounted on the base 131. The rotating shaft 15 is rotatably connected to the support column 132. The driving device includes a rotary motor 14 connected to the rotating shaft 15, which is fixedly mounted on the support column 132. Specifically, the rotating motor 14 can drive the rotating shaft 15 to rotate, thereby driving the inner bag 31 and the outer bag 32 to rotate. The number of rotations is determined according to the desired sewing process.

[0035] In this embodiment, the base 131 is provided with a linear motor, which is used to drive the base 131 to move along the guide rail 11. Specifically, the linear motor can drive the base 131 to automatically move along the guide rail 11, thereby automatically driving the inner bag 31 and the outer bag 32 to move. A ball screw or other structure can also be used instead of the linear motor, and the base 131 can also be manually driven to move.

[0036] The negative pressure device in this embodiment includes a negative pressure tube 25 communicating with the interior of the negative pressure plate 23 , and a negative pressure machine connected to the negative pressure tube 25 .

[0037] In this embodiment, the outer wall of the support plate 22 and the outer wall of the negative pressure plate 23 are both provided with a rubber layer.

[0038] In summary, the container bag sewing device of this embodiment, when in use, pulls the support plate 22 and the negative pressure plate 23 close to the fixed block 16 through the synchronous action of multiple first telescopic cylinders 21, so that the support plate 22 then puts the opening of the polymer inner bag 31 with a sealing function on the outside of the support plate 22, and makes the opening side of the inner bag 31 protrude from the support plate 22 (that is, the protruding part is close to the sewing machine 12), and then starts the negative pressure device to generate negative pressure in the negative pressure plate 23, and the inner bag 31 is sucked by the negative pressure. After the inner bag 31 is sucked, the support plate 22 and the negative pressure plate 23 are stretched open by the first telescopic cylinder 21. , thereby completing the expansion of the inner bag 31. After expansion, the first telescopic cylinder 21 is used to pull the support plate 22 to contract, so that the opening of the inner bag 31 is reduced (the purpose of expanding first and then shrinking is to enable the negative pressure plate 23 to be sucked to the correct position on the inner bag 31). The outer bag 32 is then put on the inner bag 31, and the open side of the outer end is flush with the open side of the inner bag 31 (or separated by a certain distance). The first telescopic cylinder 21 is then used to expand the support plate 22 and the negative pressure plate 23, and the inner bag 31 and the outer bag 32 are expanded at the same time. During the expansion process, the position of the outer bag 32 can be manually adjusted gradually. After being fully expanded, the outer bag 32 and the inner bag 31 are sent to the sewing machine 12 via the slide 13, where they are engaged. The fixed block 16 is driven by the drive device to rotate, thereby driving the inner bag 31 and the outer bag 32 to rotate. During the rotation process, the inner bag 31 and the outer bag 32 are sewn together by the sewing machine 12. After sewing is completed, the container bag is removed and the above operation is repeated. In this way, the inner bag 31 and the outer bag 32 can be sewn together very efficiently and accurately for container bags with large diameters, which can effectively improve the precision and quality of sewing, reduce the intensity of manual repetitive labor, and improve sewing efficiency.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A container bag sewing device, characterized by: The invention comprises a guide rail (11) arranged horizontally on the ground, a sewing machine (12) arranged at one end of the guide rail (11), a slide (13) slidably arranged on the guide rail (11), a rotating shaft (15) arranged horizontally and rotatably on the slide (13), a driving device for driving the rotating shaft (15) to rotate, a fixed block (16) connected to the end of the rotating shaft (15), and a plurality of bag-supporting devices (20) evenly distributed on the side wall of the fixed block (16); The bag-supporting device (20) comprises a first telescopic cylinder (21) connected to the fixed block (16), an arc-shaped support plate (22) and an arc-shaped negative pressure plate (23) provided at the movable end of the first telescopic cylinder (21), and a negative pressure device; the negative pressure plate (23) is a hollow structure and has a plurality of negative pressure holes (24) opened on the outside, and the negative pressure device is communicated with the interior of the negative pressure plate (23); The axial direction of the rotating shaft (15) is perpendicular to the axial direction of the first telescopic cylinder (21), the plurality of support plates (22) are located on the same circumference, the axial direction of the rotating shaft (15) is perpendicular to the plane where the plurality of support plates (22) are located, and gaps are provided between adjacent support plates (22).

2. The container bag sewing device according to claim 1, characterized in that: A pair of support plates (22) are provided in one of the bag-supporting devices (20). The pair of support plates (22) are parallel to each other and are respectively provided on opposite sides of the first telescopic cylinder (21); the negative pressure plate (23) is provided between the pair of support plates (22).

3. The container bag sewing device according to claim 2, characterized in that: One end of the support plate (22) is connected to the first telescopic cylinder (21), and the thickness of the support plate (22) at one end close to the first telescopic cylinder (21) is greater than the thickness of the other end opposite thereto.

4. The container bag sewing device according to claim 3, characterized in that: One end of a pair of support plates (22) close to the first telescopic cylinder (21) is fixedly connected via a first connecting shaft (26), and the movable end of the first telescopic cylinder (21) is connected to the first connecting shaft (26).

5. The container bag sewing device according to claim 4, characterized in that: The movable end of the first telescopic cylinder (21) is hinged to the first connecting shaft (26), and one end of a pair of support plates (22) away from the first connecting shaft (26) is fixedly connected via a second connecting shaft (27); The bag-holding device (20) further comprises a second telescopic cylinder (28); the cylinder body of the second telescopic cylinder (28) is hinged to the cylinder body of the first telescopic cylinder (21), and the movable end of the second telescopic cylinder (28) is hinged to the second connecting shaft (27).

6. The container bag sewing device according to claim 5, characterized in that: The first telescopic cylinder (21) and the second telescopic cylinder (28) are both selected from the group consisting of an air cylinder, an electric push rod, and a hydraulic cylinder.

7. The container bag sewing device according to claim 1, characterized in that: The sliding seat (13) includes a base (131) slidably connected to the guide rail (11), and a support column (132) vertically arranged on the base (131); the rotating shaft (15) is rotatably connected to the support column (132); The driving device comprises a rotating motor (14) connected to the rotating shaft (15); the rotating motor (14) is fixed on the supporting column (132).

8. The container bag sewing device according to claim 7, characterized in that: A linear motor is provided in the base (131), and the linear motor is used to drive the base (131) to move along the guide rail (11).

9. The container bag sewing device according to claim 1, characterized in that: The negative pressure device comprises a negative pressure pipe (25) communicating with the interior of the negative pressure plate (23), and a negative pressure machine connected to the negative pressure pipe (25).

10. The container bag sewing device according to claim 1, characterized in that: The outer wall of the support plate (22) and the outer wall of the negative pressure plate (23) are both provided with a rubber layer.

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