Container bag sewing device

Abstract

The present invention provides a container bag sewing device, comprising: a sling sewing machine for cutting and sewing slings, the sling having first and second opposite ends and a middle portion located therebetween; a bag bottom cutting machine for cutting the bag bottom; a sling bottom sewing machine for sewing the bag bottom and the sling; and a bag bottom tooling unit that supports the bag bottom and is rotatable between a first and a second orientation. In the first orientation, the sling bottom sewing machine sews the first end of the sling to a first position on the bag bottom; in the second orientation, the sling bottom sewing machine sews the middle portion and the second end of the sling to second and third positions on the bag bottom. The center, second position, and third position of the bag bottom are collinear, and the portion of the sling between the first end and the middle portion forms the lifting lug of the container bag. According to this solution, the bag bottom tooling unit sews the sling to the bag bottom at a predetermined position, thereby improving the connection strength between the bag bottom and the sling and achieving automated sewing of the sling and bag bottom.

Description

Technical Field

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

[0002] FIBCs are widely used flexible transport packaging containers that can be assembled into unitized units using a crane or forklift. However, most FIBC production lines are semi-automatic, requiring extensive human intervention, resulting in low efficiency and poor controllability of production quality. Currently, no mature automated FIBC production line exists.

[0003] Therefore, in practice, it is urgent to provide a container bag sewing device that can achieve fully automated production to reduce human intervention and improve production efficiency and quality. Summary of the Invention

[0004] The present invention aims to provide a container bag sewing device capable of realizing fully automated production, so as to improve production efficiency.

[0005] In one aspect of the present invention, a container bag sewing device is provided, comprising: a sling sewing machine that cuts and sews a sling, the sling having opposite first and second ends and a middle portion located between the two; a bag bottom cutting machine that cuts the bag bottom; a sling bag bottom sewing machine that is used to sew the bag bottom and the sling; a bag bottom tooling that supports the bag bottom and is capable of rotating between a first orientation and a second orientation, in the first orientation, the sling bag bottom sewing machine sews the first end of the sling to a first position of the bag bottom; in the second orientation, the sling bag bottom sewing machine sews the middle portion and the second end of the sling to a second position and a third position of the bag bottom, wherein the center, the second position and the third position of the bag bottom are collinear, and the sling portion between the first end and the middle portion forms the lifting ear of the container bag.

[0006] According to this solution, the three parts of the sling are sewn to the bag bottom at predetermined positions using the bag bottom tooling, thereby improving the connection strength between the bag bottom and the sling and realizing automated sewing of the sling and the bag bottom.

[0007] Optionally, the bag bottom tooling is configured to rotate 270 degrees from the first orientation to the second orientation.

[0008] Optionally, the first position, the second position and the third position occupy three of the four centrally symmetrical positions of the bag bottom tooling.

[0009] In another aspect of the present invention, a container bag sewing device is provided, comprising: a sling sewing machine that cuts and sews slings, the slings including a first sling and a second sling, each of which has opposite first and second ends, and a middle portion located between the two; a bag bottom cutting machine that cuts the bag bottom; a sling bag bottom sewing machine that is used to sew the bag bottom and the slings; a bag bottom tool that supports the bag bottom and is capable of rotating; the bag bottom tool is configured to rotate from a first orientation to a second orientation in a first rotation, in the first orientation, the sling bag bottom sewing machine sews the first end of the first sling to the first position of the bag bottom, and in the second orientation, the sling bag bottom sewing machine sews the middle portion and the second end of the first sling to each other. to the second position and the third position of the bag bottom, wherein the center, the second position and the third position of the bag bottom are collinear, and the sling portion between the first end and the middle portion of the first sling forms the first lifting ear of the container bag; the bag bottom tooling is configured to rotate from the second orientation to the first orientation in the second rotation, and in the second orientation, the sling bag bottom sewing machine sews the first end of the second sling to the third position of the bag bottom, and in the first orientation, the sling bag bottom sewing machine sews the middle portion and the second end of the second sling to the fourth position and the first position of the bag bottom, wherein the center, the first position and the fourth position of the bag bottom are collinear, and the sling portion between the first end and the middle portion of the second sling forms the second lifting ear of the container bag.

[0010] According to this solution, the two slings are sewn to the bag bottom at predetermined positions using a bag bottom tool, thereby improving the connection strength between the bag bottom and the two slings and realizing automated sewing of the two slings and the bag bottom.

[0011] Optionally, the bag bottom tool is configured to rotate 270 degrees counterclockwise from the first orientation to the second orientation in a first rotation; and the bag bottom tool is configured to rotate 270 degrees clockwise from the second orientation to the first orientation in a second rotation.

[0012] According to this solution, the bag bottom tooling only needs to be rotated between two positions, and the control is simple.

[0013] Optionally, the first position, the second position, the third position and the fourth position occupy four centrally symmetrical positions of the bag bottom tooling.

[0014] According to this solution, a firm and reliable connection is formed between the bag bottom and the sling.

[0015] Optionally, the sling sewing machine is configured to sew the bag bottom reinforcement block at the first end, the middle part and the second end part of the first sling; and the sling sewing machine is configured to sew the bag bottom reinforcement block at the middle part of the second sling.

[0016] According to this solution, the bag bottom reinforcement block is used to improve the connection strength between the sling and the bag bottom.

[0017] Optionally, for each of the first and second slings, the sling sewing machine is configured to sew the bag body reinforcement block on one side and sew the reinforcement tape on the other side at two locations between the first end and the middle location of each of the first and second slings.

[0018] According to this solution, the bag body reinforcement block is used to improve the connection strength between the sling and the bag body.

[0019] Optionally, the suspender sewing machine includes two bag body reinforcement block sewing stations and one reinforcement belt sewing station, and the two bag body reinforcement block sewing stations are used to sew the first bag body reinforcement block and the second bag body reinforcement block, respectively. The sewn first bag body reinforcement and second bag body reinforcement blocks are sequentially advanced to the reinforcement belt sewing station, and their respective reinforcement belts are sewn at this station.

[0020] Optionally, for each of the first and second slings, the sling sewing machine is configured to wrap and sew the handle cloth on the outside of the sling between the two locations.

[0021] Optionally, the suspender strap sewing machine includes a suspender strap cloth sewing machine and a suspender strap cloth wrapping machine, the suspender strap cloth wrapping machine is configured to wrap the suspender strap cloth around the upper and lower sides of the suspender strap, and the suspender strap cloth sewing machine is configured to sew the suspender strap cloth and the suspender strap cloth together.

[0022] Optionally, the sling cloth wrapping machine includes a support and a folding device, the support supports the sling and the sling cloth, the middle part of the sling cloth is located below the sling and overlaps with the sling, and the two side wing parts extend beyond the middle part, and the folding device is configured to rotate relative to the support and push the two side wing parts to move above the sling during the rotation process.

[0023] Optionally, the sling cloth wrapping machine further includes a pressing wheel configured to press portions of the sling and the sling cloth into the grooves of the support, so that the sling and the sling cloth are folded left and right, and the overall structure has a six-layer stacking structure, wherein the second and fifth layers are slings and the remaining layers are slings.

[0024] In another aspect of the present invention, a bulk bag is provided, which is manufactured by any of the bulk bag sewing devices described above.

[0025] In another aspect of the present invention, a container bag is provided, which includes: a bag body, a bag bottom, a first strap and a second strap; the first strap and the second strap each have opposite first and second ends, and a middle portion located between the two; wherein the first end of the first strap is sewn to the first position of the bag bottom, the middle portion and the second end of the first strap are sewn to the second and third positions of the bag bottom, wherein the center, the second position and the third position of the bag bottom are collinear, and the strap portion between the first end and the middle portion of the first strap is sewn to the bag body to form a first lifting ear of the container bag; wherein the first end of the second strap is sewn to the third position of the bag bottom, the middle portion and the second end of the second strap are sewn to the fourth position and the first position of the bag bottom, wherein the center, the first position and the fourth position of the bag bottom are collinear, and the strap portion between the first end and the middle portion of the second strap is sewn to the bag body to form a second lifting ear of the container bag.

[0026] According to this solution, a firm and reliable connection is formed between the sling and the bag body and bag bottom, giving the container bag excellent load-bearing capacity.

[0027] Optionally, bag bottom reinforcement blocks are set at the first position, the second position, the third position and the fourth position; bag body reinforcement blocks and reinforcement belts are set at the positions where the first sling and the second sling are sewn to the bag body, and the sling is located between the bag body reinforcement block and the reinforcement belt.

[0028] According to this solution, the bag bottom reinforcement block, bag body reinforcement block and reinforcement belt further improve the strength of the container bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram showing a bulk bag manufactured by the bulk bag sewing device of the present invention;

[0030] Figure 2 Shown Figure 1 Schematic diagram of the bottom of the container bag;

[0031] Figure 3 A schematic diagram of a container bag sewing device according to the present invention is shown;

[0032] Figure 4 A perspective view of a container bag sewing device according to the present invention is shown;

[0033] Figure 5 A perspective view showing a sling sewing station of a container bag sewing device of the present invention;

[0034] Figure 6A and Figure 6B Shows the structural schematics of two types of slings;

[0035] 7A to 7D A schematic diagram showing the process of sewing the sling and bag bottom;

[0036] Figure 8 A perspective view showing a handle cloth sewing station of a container bag sewing device according to the present invention;

[0037] 9A to 9D A schematic diagram showing the process of sewing a suspender cloth.

[0038] Reference numerals:

[0039] 1 Feeding port; 2 Sling; 3 Bag bottom; 4 Bag body; 5 Handle cloth; 6 Bag body reinforcement block; 7 Reinforcement belt; 8 Bag bottom reinforcement block; 9 Cable tie; 10 Label; 100 Sewing device; 200 Detection device; 300 Folding device; 400 Palletizing device; 500 Packing device; 101 Sling sewing machine; 102 Bag bottom unloading machine; 103 Sling bottom sewing machine; 104 Feeding port unloading machine; 105 Feeding port sewing machine; 106 Bag body unloading machine; 107 Bag body feed port sewing machine; 108 Bag body bottom sewing machine; 109 Bag body sling sewing machine; 110 Container bag unloading machine; 111 Circular track; 112 Main body tooling; 113 Bag bottom transfer machine; 114 Sling positioning device Device; 201 sling blanking machine; 202 sling feeding roller; 203 first bag bottom reinforcement block blanking machine; 204 second bag bottom reinforcement block blanking machine; 205 first bag body reinforcement block blanking machine; 206 second bag body reinforcement block blanking machine; 207 reinforcement belt blanking machine; 208 third bag bottom reinforcement block blanking machine; 209 first bag bottom reinforcement block sewing machine; 210 second bag bottom reinforcement block sewing machine; 211 third bag bottom reinforcement block sewing machine; 212 first bag body reinforcement block sewing machine; 213 second bag body reinforcement block sewing machine; 214 reinforcement belt sewing machine; 221 handle cloth sewing machine; 222 handle cloth wrapping machine; 223 supporter; 224 folder; 225 pressure wheel; 226 groove. DETAILED DESCRIPTION

[0040] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0041] Figure 1 and Figure 2 The schematic diagram of the structure of the container bag produced by the container bag sewing device of the present invention is shown, wherein Figure 1 For the overall perspective, Figure 2 This is a partial perspective view of the bottom. A bulk bag primarily consists of a loading port 1, slings 2, a bag bottom 3, and a bag body 4, all of which are made of PP. Both the loading port 1 and the bag body 4 are hollow cylindrical structures, with the lower end of the loading port 1 connected to the upper end of the bag body 4, forming a single, integrated hollow cylindrical structure. The lower end of the bag body 4 is sealed by the circular bag bottom 3.

[0042] There are specifically two slings 2. The left and right ends of each sling 2 are fixedly connected to the bag bottom 3, specifically fixed along the diameter direction at a 90-degree angle, and are respectively reinforced and fixed by the bag bottom reinforcement block 8. The middle part of each sling 2 forms an inverted U-shaped lifting ear near the outer side of the upper end of the feeding port 1, on which a sling strap 5 is provided. The two side portions of each sling 2 located between the middle part and the two ends are respectively fixedly connected to the side surfaces of the bag body 4 and extend along the axis of the bag body 4. Moreover, the middle part of each side of the sling 2 is reinforced and fixed to the bag body 4 by the bag body reinforcement block 6. The four ends of the two slings 2 are symmetrically arranged at the bag bottom 4, so that the four side portions are evenly spaced around the bag body 4.

[0043] In addition, a cable tie 9 is provided on the outside of the loading port 1 to tighten it. Another reinforcement strap 7 can be placed outside the overlapping area of ​​the sling 2, bag body 4, and bag body reinforcement block 6 to further enhance the connection strength. A label 10 can also be placed on the outside of the bag body 4 to serve as a mark or warning. Figure 1 Some exemplary dimensions of bulk bags are indicated, but these dimensions are for reference only and do not constitute a limitation of the present invention.

[0044] When using a bulk bag, material is added through the upper opening of the loading port 1. The loading port 1 is then sealed with a tie 9. The bag can then be lifted using the sling 2, specifically at the handle 5, for transport. The strength of the sling 2 and the bag body 4, as well as the strength of the connection between them, ensures safe transportation.

[0045] Figure 3The schematic diagram of the container bag sewing device of the present invention is shown, which is used to assemble the loading port 1, sling 2, bag bottom 3, bag body 4 and other components into a container bag. The sewing device 100 mainly includes: a sling sewing machine 101, which is used to pre-process the sling 2 and sew the handle cloth 5, bag body reinforcement block 6, reinforcement belt 7, bag bottom reinforcement block 8 and other components thereon; a bag bottom blanking machine 102, which is used to blank the bag bottom 3; a sling bag bottom sewing machine 103, which is used to sew the pre-processed sling 2 and the bag bottom 3 to obtain a sling bag bottom assembly; a loading port blanking machine 104, which is used to discharge the loading port 1 to the tooling body; a loading port sewing machine 105, which is used to sew the hem of the loading port 1 and connect the loading port 1 to the cable tie 9 sewing; bag body unloading machine 106, used for unloading bag body 4 to tooling main body; bag body upper feed opening sewing machine 107, used for sewing the feed opening 1 and bag body 4 to form a bag body feed opening assembly; bag body bag bottom sewing machine 108, used for sewing the bag upper feed opening assembly and the sling bag bottom assembly, specifically sewing the bag body and the bag bottom; bag body sling sewing machine 109, used for sewing the sling 2 and the bag body 4 to obtain a sewn container bag; container bag detaching machine 110, used to detach the sewn container bag from the main tooling.

[0046] Figure 4 A perspective view of the container bag sewing device 100 of the present invention is shown. The sewing device 100 has a material transport device, which includes a circular track 111 and a main body tooling 112 that can move cyclically along the circular track 111. The upper side of the main body tooling 112 is a cylindrical support structure, which is used to sleeve and support the cylindrical feeding port 1 provided by the feeding port unloading machine 104, and the cylindrical bag body 4 provided by the bag body unloading machine 106. A driving mechanism is installed on the lower side of the main body tooling 112, including a rotary driving mechanism (such as a gear set mechanism) that drives the main body tooling 112 to perform a rotary motion, and a mobile driving mechanism (such as a gear rack mechanism) that drives the main body tooling 112 to move along the circular track 111. The present invention does not limit the specific forms of the rotary driving mechanism and the mobile driving mechanism, and any driving mechanism that can achieve the corresponding form of motion falls within the scope of protection of the present invention. Furthermore, the main tooling 112 may include multiple expandable and contractible tensioning blades, which are switched between a distance-to-distance and a proximity-to-distance state by an electric push rod, allowing the main tooling 112 to switch between an expanded and contracted state. In the expanded state, the main tooling 112 expands in diameter, tightening the bag body and loading port above it. In the contracted state, the diameter decreases, releasing the tightening force and facilitating the separation of bulk bags. Multiple main tooling 112s can be used to facilitate simultaneous processing of multiple bulk bags.

[0047] The main tooling 112 moves in a circular motion along the circular track 111 and passes through five stations in sequence: the blanking station A for the blanking port, the bag body blanking and sewing station B, the bag body and bottom sewing station C, the bag body strap sewing station D, and the container bag separation station E. Figure 4Five body tooling 112 are shown at various workstations.

[0048] Above the material port unloading station A, a loading port unloading machine 104 is installed. It is used to discharge the material from the reel in a flattened state, convert it into a cylindrical shape above the main tooling 112, and fit it onto the main tooling 112. It is then cut to a predetermined length by a hot melt device, forming the loading port 1. Below the loading port unloading machine 104, an air gripper is installed to pull the loading port 1 from top to bottom, advancing it to the desired position. A loading port sewing machine 105 is installed to the side of station A. On the one hand, the feed port sewing machine 105 can perform hemming and sewing on the upper edge of the feed port 1 supported on the main tooling 112 (the term "hemming and sewing" in the present invention means: folding the sewing area first and then applying sewing thread to improve the sewing strength; preferably, the hemming and sewing can be folded twice and then applying sewing thread); on the other hand, the feed port sewing machine 105 can move from top to bottom to sew the cable tie 9 in the middle of the feed port 1. After completing the hemming and sewing of the cable tie, the air gripper pulls the sewn feed port 1 down to the appropriate position of the main tooling 112 to facilitate docking with the subsequent bag body 4. Then, the main tooling 112 moves to the next station B.

[0049] At the bag body blanking and sewing station B, a bag body blanking machine 106 is provided above, which is used to output the material from the reel in a flattened state, switch it into a cylindrical shape above the main body tooling 112, and put it on the main body tooling 112, and then cut it into a predetermined length by a hot melt device to form the bag body 4. An air claw is provided below the bag body blanking machine 106, which is used to pull the bag body 4 from top to bottom and move it to the desired position. A bag body feed opening sewing machine 107 is provided on the side of station B. The bag body feed opening sewing machine 107 can perform curling and sewing on the bag body 4 and the feeding opening 1, so that the lower edge of the bag body 4 is sewn and connected with the lower edge of the feeding opening 1. Then, the main body tooling 112 moves to the next station C.

[0050] Above the bag body blanking and sewing station C, a bag bottom transfer machine 113 is installed to transfer the prefabricated bag bottom strap assembly to the main body tooling 112. To the side of station C, a bag body and bottom sewing machine 108 is installed. This machine 108 can hem the bag body 4 and bag bottom 3, sewing the upper edge of the bag body 4 to the outer edge of the bag bottom 3. The main body tooling 112 then moves to the next station D.

[0051] At the bag body sling sewing station D, a sling positioning device 114 is provided to straighten the naturally drooping sling downward so that it fits the bag body 4. A bag body sling sewing machine 109 is provided on the side of the station D. The bag body sling sewing machine 109 sews the bag body 4 and the sling 2 together, especially sewing the bag body reinforcement block 6 and reinforcement belt 7 pre-sewn on the sling 2 to the predetermined position on the bag body 4, such as Figure 2As shown, the assembly of the container bag is completed. Then, the main tooling 112 moves to the next station E.

[0052] At the container bag detaching station E, a container bag detaching machine 110 is set above it. Specifically, it can be a movable air claw structure, which is used to separate the assembled container bags from the main tooling 112. The separated container bags can be transferred to the downstream of the production line, and the main tooling 112 will circulate back to the unloading station A for the next work cycle.

[0053] Figure 4 Also shown are a sling sewing machine 101, a bag bottom blanking machine 102, and a sling bag bottom sewing machine 103 for prefabricating a bag bottom sling assembly, which are arranged linearly and located on the outside of the circular track 111. The sling sewing machine 101 is used to process and sew the sling 2 as a whole, and uses multiple sewing machines to sew the sling 2 with the bag body reinforcement block 6, the reinforcement belt 7, and the bag bottom reinforcement block 8, and sew the sling 2 with the handle cloth 5 together. The bag bottom blanking machine 102 is used to blank the circular bag bottom 3 from the rolled material, and it has an annular cutting tool. The sling bag bottom sewing machine 103 is used to sew the sling 2 to the bag bottom 3, especially to sew the pre-sewn bag bottom reinforcement block 8 on the sling 2 to the predetermined position on the bag bottom 3, such as Figure 2 As shown, the bag bottom sling assembly described above is obtained.

[0054] Figure 5 A perspective view of a sling sewing machine 101 is shown. The sling sewing machine 101 includes a sling blanking machine 201, which continuously delivers a raw sling 2. A cutter is located at the output of the sling blanking machine 201 to cut the sling 2 into desired lengths. Two sling feed rollers 202 are positioned at each end to support and convey the sling 2. Positioned between the two sling feed rollers 202, from left to right, are a first bottom reinforcement block blanking machine 203, a second bottom reinforcement block blanking machine 204, a first body reinforcement block blanking machine 205, a second body reinforcement block blanking machine 206, a reinforcement tape blanking machine 207, and a third bottom reinforcement block blanking machine 208. The first, second, and third bottom reinforcement block blanking machines 203, 204, and 208 deliver their respective bottom reinforcement blocks perpendicular to the forward direction of the sling 2 to the underside of the sling 2. At the output ports of the first, second, and third bag bottom reinforcement block blanking machines 203, 204, and 208, corresponding cutting machines are provided for cutting the bag bottom reinforcement blocks 8 into desired lengths. On the opposite sides of the first, second, and third bag bottom reinforcement block blanking machines 203, 204, and 208, corresponding first, second, and third bag bottom reinforcement block sewing machines 209, 210, and 211 are provided for sewing the bag bottom reinforcement blocks 8 to the sling 2.

[0055] The first and second bag body reinforcement block blanking machines 205 and 206 are used to deliver the corresponding bag body reinforcement blocks 6 to the bottom of the sling 2 in a direction perpendicular to the forward direction of the sling 2. At the output ports of the first and second bag body reinforcement block blanking machines 205 and 206, corresponding cutting machines are installed to cut the bag body reinforcement blocks 6 into the desired length. On opposite sides of the first and second bag body reinforcement block blanking machines 205 and 206, corresponding first and second bag body reinforcement block sewing machines 212 and 213 are also installed to sew the bag body reinforcement blocks 6 to the sling 2.

[0056] The reinforcement tape feeder 207 is used to deliver the reinforcement tape 7 perpendicular to the forward direction of the sling 2 to the top of the sling 2. The reinforcement tape 7 and the bag reinforcement block 6 sandwich the sling 2. A corresponding cutting machine is also located at the output of the reinforcement tape feeder 207 to cut the reinforcement tape 7 to the desired length. On the opposite side of the reinforcement tape feeder 207, a corresponding reinforcement tape sewing machine 214 is also located to sew the reinforcement tape 7 to the sling 2.

[0057] Figure 6A and Figure 6B The diagram shows two slings 2 for a container bag. The two slings 2 have different structures. The first sling 21 has three bag bottom reinforcement blocks 8 located at both ends and in the middle, while the second sling 22 has only one bag bottom reinforcement block 8 located in the middle. Specifically, Figure 6A As shown, the first sling 21 is arranged from right to left in the following order: the first bag bottom reinforcement block 81 located at the first end of the sling 21, the first bag body reinforcement block 61, the second bag body reinforcement block 62, the second bag bottom reinforcement block 82, and the third bag bottom reinforcement block 83 located at the second end of the sling 21. Among them, the first reinforcement belt 71 and the second reinforcement belt 72 are arranged overlapping with the first bag body reinforcement block 61 and the second bag body reinforcement block 62, and are arranged opposite to them on the front and back sides of the sling 2. Figure 6B As shown, the second sling 22 is provided with the following components from right to left: a third bag body reinforcement block 63, a fourth bag body reinforcement block 64, and a fourth bag bottom reinforcement block 84. The third and fourth reinforcement belts 73 and 74 overlap with the third and fourth bag body reinforcement blocks 63 and 64 and are arranged opposite to them on the front and back sides of the sling 2. No bottom reinforcement blocks are provided at either end of the second sling 22.

[0058] During processing, the suspender tape sewing machine 101 manufactures the first suspender tape 21 and the second suspender tape 22 alternately.

[0059] The first sling 21 is processed as follows. Figure 5First, the sling cutting machine 201 delivers the initial sling 2 to a designated location. Then, the first bag bottom reinforcement block cutting machine 203, the second bag bottom reinforcement block cutting machine 204, the first bag body reinforcement block cutting machine 205, the second bag body reinforcement block cutting machine 206, and the third bag bottom reinforcement block cutting machine 208 cut the corresponding reinforcement blocks, then cut and sew them to the sling 2. Next, the sling feed roller 202 starts, delivering the already-sewn first bag body reinforcement block 61 to the reinforcement band cutting machine 207. The reinforcement band cutting machine 207 delivers the first reinforcement band 71 above the first bag body reinforcement block 61 and the sling 2, then cuts and sews it to the sling 2. The process is then repeated, sewing the second reinforcement band 72 onto the already-sewn second bag body reinforcement block 62. This completes the processing of the first sling 21, followed by the processing of the second sling 22.

[0060] The second sling 22 is processed as follows. Figure 5 First, the sling cutting machine 201 delivers the initial sling 2 to the designated position. Then, the second bottom reinforcement block cutting machine 204, the first body reinforcement block cutting machine 205, and the second body reinforcement block cutting machine 206 cut the corresponding reinforcement blocks (note that the first and third bottom reinforcement block cutting machines 203 and 208 are not working at this time). The corresponding reinforcement blocks are then cut and sewn to the sling 2. Next, the sling feed roller 202 starts to move the already sewn third body reinforcement block 623 to the position of the reinforcement band cutting machine 207. The reinforcement band cutting machine 207 delivers the third reinforcement band 73 to the top of the third body reinforcement block 63 and the sling 2, then cuts the third reinforcement band 73 and sews it to the sling 2. The process is then repeated, sewing the fourth reinforcement band 74 onto the already sewn fourth body reinforcement block 64. This completes the processing of the second sling 22, and then the next first sling 21 is processed, and the cycle continues.

[0061] Figures 7A-7D Schematic diagram of the sling cloth sewing station and the sling bag bottom sewing station in the sewing device 100 is shown. Figure 7A As shown, immediately downstream of the sling sewing machine 101, a bag bottom jig 220 is provided, which has a circular upper support surface for supporting the circular bag bottom 3 thereon. Moreover, the bag bottom jig 220 can rotate around its axis. The sling bag bottom sewing machine 103 is provided above the bag bottom jig 220, as shown in FIG. Figure 3 As shown, it can be two parallel sewing machines for sewing the sling 2 to the bag bottom 3 at the position of the bag bottom reinforcement block 8. The figure shows four centrally symmetrical positions A, B, C, and D, corresponding to the four sewing positions of the bag bottom reinforcement block 8.

[0062] First, sew the first sling 21. Figure 7AAs shown, the first sling 21 is conveyed forward. When the first bag bottom reinforcement block 81 at the first end of the sling 21 reaches position A of the bag bottom tool 220, the conveyance stops. The sling bag bottom sewing machine 103 operates to sew the bag bottom 3 and the first bag bottom reinforcement block 81. Afterwards, the first sling 21 continues to be conveyed forward, and the bag bottom tool 220 starts to rotate counterclockwise. When the first sling 21 is conveyed to a certain position, such as Figure 7B As shown, the sling stops conveying and the bag bottom tooling 220 stops rotating. At this time, the portion of the first sling 21 located between the two bag body reinforcement blocks 61 and 62 moves to the position of the handle cloth sewing machine 221. The handle cloth sewing machine 221 is part of the sling sewing machine 101. It is located between the position of the third bag bottom reinforcement block blanking machine 208 (i.e., the position for sewing the first bag bottom reinforcement block 81) and the bag bottom tooling 220. It is used to wrap and sew the handle cloth 5 around the outside of this portion of the first sling 21. This portion will form a lifting ear of the container bag. After the sewing of the handle cloth 5 is completed, the first sling 21 continues to be conveyed forward, and the bag bottom tooling 220 continues to rotate counterclockwise. When it rotates to 270° (relative to Figure 7A Initial position) Figure 7C As shown, the second bottom reinforcement piece 82 located in the middle of the first sling 21 and the third bottom reinforcement piece 83 located at the second end have reached positions B and D, respectively. Subsequently, the sling bottom sewing machine 103 operates to sew the bottom 3 to the second and third bottom reinforcement pieces 82 and 83. This completes the sewing of the first sling 2 and the bottom 3.

[0063] The second sling 22 is then sewn together. The process is essentially the same as for the first sling 21, with only the differences described below. The second sling 22 is conveyed forward. When its end (note that it lacks the bottom reinforcement block, but corresponds to the position of the first bottom reinforcement block 81 on the first sling 21) reaches position D on the bottom tooling 220, it stops. The sling bottom sewing machine 103 then operates, sewing the bottom 3 to the end of the second sling 22 at position D, where the third bottom reinforcement block 83 on the first sling 21 is located. The second sling 22 then continues to be conveyed forward, while the bottom tooling 220 begins to rotate clockwise. When the second sling 22 is transported to a certain position, the sling stops being transported and the bag bottom tooling 220 stops rotating. At this time, the portion of the second sling 22 located between the two bag body reinforcement blocks 63 and 64 moves to the position of the handle cloth sewing machine 221. The handle cloth sewing machine 221 wraps and sews the handle cloth 5 around the outside of this portion of the second sling 22. This portion will form another lifting ear of the container bag. After the sewing of the handle cloth 5 is completed, the second sling 22 continues to be transported forward, while the bag bottom tooling 220 continues to rotate clockwise. When it rotates to 270° (relative to the Figure 7C Initial position) Figure 7DAs shown, the fourth bottom reinforcement block 84 on the second sling 22 reaches position C. Simultaneously, the other end of the second sling 22 (note that it lacks a bottom reinforcement block, but corresponds to the position of the third bottom reinforcement block 83 on the first sling 21) reaches position A on the bottom tooling 220. Subsequently, the sling bottom sewing machine 103 operates, sewing the bottom 3 to the fourth bottom reinforcement block 84 and the other end of the second sling 22 at positions C and A, respectively. This completes the bottom sling assembly and, as described above, will be transferred to the main tooling 112 by the bottom transfer machine 113. The bottom tooling 220 then empties to receive the next bottom 3 for the next bottom sling assembly process.

[0064] It should be noted that although the above description is for Figure 6A and Figure 6B The different slings shown are only a preferred and exemplary embodiment of the present invention, and the present invention is not limited thereto. Based on the teachings of the present invention, those skilled in the art can obtain other sling bag bottom connection solutions. For example, the structures of the two slings can be the same, both having two bag bottom reinforcement blocks, one at the end and one in the middle, and the two can be located on the same side of the two bag body reinforcement blocks or on opposite sides; for another example, the structures of the two slings can be the same. Figure 6A The shown form has three bag bottom reinforcement blocks, or all of them are Figure 6B The above variations all fall within the scope of protection of the present invention.

[0065] Figure 8 The figure shows a schematic diagram of a hanger cloth sewing station. A hanger cloth sewing machine 221 and a hanger cloth wrapping machine 222 are set in this station. The hanger cloth sewing machine 221 can move along the track in three orthogonal directions: vertical direction, direction parallel to the sling, and direction perpendicular to the sling. The hanger cloth wrapping machine 222 includes a support 223, a folder 224, and a pressure wheel 225. Figure 9A As shown, the support 223 is a flat plate-shaped member extending along the sling arrangement direction, and its upper surface is used to support the sling 2. A groove 226 is provided in the middle of the support 223. Two folders 224 are hinged at the two edges of the support 223.

[0066] Figure 9B The suspender cloth 5 is shown to be supplied to the surface of the support 223, and the sling 2 is supplied above the suspender cloth 5. The suspender cloth 5 has a middle portion located below and overlapping the sling 2, and two side portions located on both sides of the middle portion, extending beyond the sling 2 and located above the folder 224. Figure 9B In this state, the driving mechanism can be operated to drive the two folders 224 to fold upward, and the ends of the folders 224 push the two side wing parts to move above the sling 2. Figure 9CThe folded state is shown, with the edges of the two wing portions touching and covering the top of the sling 2, whereby the handle fabric 5 completely wraps the upper and lower surfaces of the sling 2. The folder 224 is then reset.

[0067] Then, Figure 8 The pressure wheel 225 is driven to move to the gap between the two side wings and then descends to push the middle portion of the sling 2 together with the handles 5 on both sides into the groove 226 of the support 223, thereby folding the sling 2 in half. The pressure wheel 225 can be driven to move in the groove 223 along the direction of the sling 2, so that the sling 2 is folded in half as a whole. The folded sling 2 forms a six-layer stacked structure, with the 1st, 3rd, 4th, and 6th layers being the handles 5 and the 2nd and 4th layers being the sling 2. Figure 9D The handle cloth sewing machine 221 starts working and applies sewing thread at the approximately middle position of the folded sling 2, sewing the six-layer laminated handle cloth 5 and the sling 2 together. Due to this six-layer laminated sewing structure, the strength of the sling 2 and the handle cloth 5 is significantly enhanced.

[0068] This document describes in detail exemplary implementations of the present invention with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the spirit of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined in various ways without exceeding the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A container bag sewing device, characterized in that: include: A suspender sewing machine for cutting and sewing suspenders, wherein the suspenders include a first suspender and a second suspender, each of which has opposite first and second ends and a middle portion located between the first and second ends; Bag bottom unloading machine, which unloads the bag bottom; Sling bag bottom sewing machine, which is used to sew bag bottom and sling; Bag bottom tooling, which supports the bag bottom and is capable of rotating; The bag bottom tooling is configured to rotate from a first orientation to a second orientation in a first rotation, wherein in the first orientation, the sling bag bottom sewing machine sews the first end of the first sling to the first position of the bag bottom, and in the second orientation, the sling bag bottom sewing machine sews the middle portion and the second end of the first sling to the second position and the third position of the bag bottom, wherein the center of the bag bottom, the second position and the third position are collinear, and the sling portion between the first end and the middle portion of the first sling forms a first lifting ear of the container bag; The bag bottom tooling is configured to rotate from the second orientation to the first orientation in a second rotation, wherein in the second orientation, the sling bag bottom sewing machine sews the first end of the second sling to the third position of the bag bottom, and in the first orientation, the sling bag bottom sewing machine sews the middle portion and the second end of the second sling to the fourth position and the first position of the bag bottom, wherein the center of the bag bottom, the first position, and the fourth position are collinear, and the sling portion between the first end and the middle portion of the second sling forms the second lifting ear of the container bag; The bag bottom tooling is further configured to rotate 270 degrees counterclockwise from the first position to the second position in the first rotation, and The bag bottom tooling is further configured to rotate 270 degrees clockwise from the second position to the first position in a second rotation; wherein, for each of the first sling and the second sling, the sling sewing machine is configured to sew the bag body reinforcement block on one side of each of the two locations between the first end portion and the middle portion thereof, and sew the reinforcement tape on the other side of each of the two locations; The sling sewing machine includes two bag body reinforcement block sewing stations and one reinforcement belt sewing station. The two bag body reinforcement block sewing stations are respectively used to sew the first bag body reinforcement block and the second bag body reinforcement block. The sewn first bag body reinforcement block and the second bag body reinforcement block are sequentially moved to the reinforcement belt sewing station and sewn with their respective reinforcement belts at this station. The container bag sewing device further comprises a sling positioning device, which is used to straighten the naturally drooping sling downward at the bag body sling sewing station so that the sling fits the bag body.

2. The container bag sewing device according to claim 1, characterized in that: The first position, the second position, the third position and the fourth position occupy four central symmetrical positions of the bag bottom tooling.

3. The container bag sewing device according to claim 1 or 2, characterized in that: The sling sewing machine is configured to sew the bag bottom reinforcement piece at the first end, the middle portion, and the second end portion of the first sling; and the sling sewing machine is configured to sew the bag bottom reinforcement piece at the middle portion of the second sling.

4. The container bag sewing device according to claim 1, characterized in that: For each of the first and second slings, the sling sewing machine is configured to wrap and sew a handle cloth on the outside of the sling between the two locations.

5. The container bag sewing device according to claim 4, characterized in that: The suspender strap sewing machine comprises a suspender cloth sewing machine and a suspender cloth wrapping machine. The suspender cloth wrapping machine is configured to wrap the suspender cloth around the upper and lower sides of the suspender strap, and the suspender cloth sewing machine is configured to sew the suspender strap and the suspender cloth.

6. The container bag sewing device according to claim 5, characterized in that: The sling cloth wrapping machine includes a support and a folding device. The support supports the sling and the sling cloth. The middle part of the sling cloth is located below the sling and overlaps with the sling. The two side wing parts extend beyond the middle part. The folding device is configured to rotate relative to the support and push the two side wing parts to move above the sling during the rotation process.

7. The container bag sewing device according to claim 6, characterized in that: The sling cloth wrapping machine also includes a pressing wheel, which is configured to press parts of the sling and the sling cloth into the groove of the support, so that the sling and the sling cloth are folded left and right, and the whole has a six-layer stacked structure, of which the second and fifth layers are slings and the remaining layers are sling cloth.

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