CN219236346U - Flexible freight bag sewing device and flexible freight bag - Google Patents

Abstract

The utility model provides a flexible freight bag sewing device, comprising: the hanging belt sewing machine is used for blanking and sewing hanging belts, and the hanging belts are provided with opposite first end parts, second end parts and middle parts positioned between the first end parts and the second end parts; a bag bottom blanking machine which blanking the bag bottom; the suspender bag bottom sewing machine is used for sewing the bag bottom and the suspender; a bag bottom tool which supports a bag bottom and can rotate between a first position and a second position, wherein in the first position, a sling bag bottom sewing machine sews a first end part of a sling to a first position of the bag bottom; in the second orientation, the strap bag bottom sewing machine sews the middle portion and the second end portion of the strap to the second position and the third position of the bag bottom, the center of the bag bottom, the second position and the third position are collinear, and the strap portion between the first end portion and the middle portion forms a lifting lug of the flexible container. According to the scheme, the hanging strip is sewn to the bag bottom at the preset position by utilizing the bag bottom tool, so that the connection strength of the bag bottom and the hanging strip is improved, and the automatic sewing of the hanging strip and the bag bottom is realized.

Description

Flexible freight bag sewing device and flexible freight bag

Technical Field

The utility model relates to the field of flexible freight bags, in particular to a flexible freight bag sewing device.

Background

The flexible transport packaging container is widely applied, and can realize unitization by being matched with a crane or a forklift. The production lines of common flexible freight bag production enterprises are all in a semi-automatic form, a large amount of personnel are required to intervene, the production efficiency is low, and the controllability of the production quality is poor. At present, no mature automatic flexible freight bag production line exists.

Therefore, in practice, it is needed to provide a flexible freight bag sewing device capable of realizing full-automatic production, so as to reduce personnel intervention and improve production efficiency and quality.

Disclosure of Invention

The utility model aims to provide a flexible freight bag sewing device capable of realizing full-automatic production so as to improve production efficiency.

In one aspect of the present utility model, there is provided a flexible freight bag sewing apparatus comprising: the hanging belt sewing machine is used for blanking and sewing hanging belts, and the hanging belts are provided with opposite first end parts, second end parts and middle parts positioned between the first end parts and the second end parts; a bag bottom blanking machine which blanking the bag bottom; a suspender bag bottom sewing machine for sewing the bag bottom and the suspender; a bag bottom tool which supports a bag bottom and can rotate between a first position and a second position, wherein in the first position, a sling bag bottom sewing machine sews a first end part of a sling to a first position of the bag bottom; in a second orientation, the strap bag bottom sewing machine sews the intermediate portion and the second end portion of the strap to the second and third positions of the bag bottom, wherein the center, second and third positions of the bag bottom are collinear and the strap portion between the first end portion and the intermediate portion forms a lifting tab of the flexible container.

According to the scheme, three parts of the hanging strip are sewn to the bottom of the bag at preset positions by utilizing the bag bottom tool, so that the connection strength of the bottom of the bag and the hanging strip is improved, and the automatic sewing of the hanging strip and the bottom of the bag is realized.

Optionally, the bag bottom fixture is configured to be rotated 270 degrees from the first orientation to the second orientation.

Optionally, the first position, the second position, and the third position occupy three of four centrally symmetric positions of the bag bottom tooling.

In another aspect of the present utility model, there is provided a flexible freight bag sewing apparatus comprising: a sling sewing machine that feeds and sews a sling, the sling including a first sling and a second sling each having opposite first and second ends and a middle portion therebetween; a bag bottom blanking machine which blanking the bag bottom; a suspender bag bottom sewing machine for sewing the bag bottom and the suspender; the bag bottom tool supports the bag bottom and can rotate; the bag bottom tooling is configured to rotate in a first rotation from a first orientation in which the strap bag bottom sewing machine sews a first end of the first strap to a first position of the bag bottom to a second orientation in which the strap bag bottom sewing machine sews a middle portion and a second end of the first strap to a second position and a third position of the bag bottom, wherein the center, second position and third position of the bag bottom are collinear, and a strap portion between the first end and the middle portion of the first strap forms a first lifting lug of the flexible container; the bag bottom tooling is configured to rotate in a second rotation from a second orientation in which the strap bag bottom sewing machine sews a first end of the second strap to a third position of the bag bottom to a first orientation in which the strap bag bottom sewing machine sews a middle portion and a second end of the second strap to a fourth position and a first position of the bag bottom, wherein the center, the first position, and the fourth position of the bag bottom are collinear, and a strap portion between the first end and the middle portion of the second strap forms a second lifting tab of the flexible container.

According to the scheme, the two hanging strips are sewn to the bag bottom at the preset position by utilizing the bag bottom tool, so that the connection strength of the bag bottom and the two hanging strips is improved, and the two hanging strips and the bag bottom are automatically sewn.

Optionally, the bag bottom tooling is configured to rotate 270 degrees counter-clockwise from the first orientation to the second orientation in the first rotation; and the bag bottom tooling is configured to rotate 270 degrees clockwise from the second orientation to the first orientation in a second rotation.

According to this scheme, the frock at the bottom of the bag only need rotate between two positions, and control is simple and convenient.

Optionally, the first position, the second position, the third position and the fourth position occupy four centrosymmetric positions of the bag bottom tooling.

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

Optionally, the strap sewing machine is configured to stitch the bag bottom stiffener at the first end, the middle portion, the second end of the first strap; and, the strap sewing machine is configured to stitch the bag bottom reinforcement block at a middle portion of the second strap.

According to this scheme, the strength of connection between suspender and bag bottom has been improved with the bag bottom reinforcing block.

Optionally, for each of the first and second straps, the strap sewing machine is configured to stitch the bag body reinforcing block on one side and the reinforcing band on the other side at two locations between its respective first end and middle location.

According to this scheme, utilize the bag body reinforcing piece to improve the joint strength between suspender and the bag body.

Optionally, the suspender sewing machine comprises two bag body reinforcing block sewing stations and a reinforcing belt sewing station, wherein the two bag body reinforcing block sewing stations are respectively used for sewing a first bag body reinforcing block and a second bag body reinforcing block, the sewn first bag body reinforcing block and second bag body reinforcing block sequentially advance to the reinforcing belt sewing station, and respective reinforcing belts are sewn at the stations.

Optionally, for each of the first strap and the second strap, the strap sewing machine is configured to wrap and stitch a handle cloth between the two locations, outside the strap.

Optionally, the hanging strip sewing machine comprises a hanging strip sewing machine and a hanging strip wrapping machine, wherein the hanging strip wrapping machine is configured to wrap hanging strip on the upper side and the lower side of the hanging strip, and the hanging strip sewing machine is configured to stitch the hanging strip and the hanging strip.

Optionally, the handle cloth wrapping machine includes a supporter supporting the hanging strip and the handle cloth, a middle portion of the handle cloth being located below and overlapping the hanging strip, the two side wing portions exceeding the middle portion, and a folder configured to rotate relative to the supporter and to push the two side wing portions to move above the hanging strip during rotation.

Optionally, the hanging-handle cloth wrapping machine further comprises a pinch roller configured to press the hanging-belt and part of the hanging-handle cloth into the groove of the supporter, so that the hanging-belt and the hanging-handle cloth are folded left and right, and the whole has a six-layer laminated structure, wherein the second and fifth layers are hanging-belt, and the rest layers are hanging-handle cloth.

In a further aspect of the utility model there is provided a bulk bag manufactured by the bulk bag sewing apparatus of any one of the preceding claims.

In another aspect of the present utility model, there is provided a flexible freight bag comprising: the bag comprises a bag body, a bag bottom, a first hanging strip and a second hanging strip; the first sling and the second sling each have opposite first and second ends and a middle portion therebetween; wherein the first end of the first strap is sewn to the first location of the bag bottom, the middle portion and the second end of the first strap are sewn to the second location and the third location of the bag bottom, wherein the center of the bag bottom, the second location and the third location are collinear, the strap portion between the first end and the middle portion of the first strap is sewn to the bag body and forms a first lifting lug of the flexible container; wherein the first end of the second strap is sewn to the third location of the bag bottom, the middle portion and the second end of the second strap are sewn to the fourth location and the first location of the bag bottom, wherein the center of the bag bottom, the first location and the fourth location are collinear, and the strap portion between the first end and the middle portion of the second strap is sewn to the bag body and forms a second lifting lug of the flexible container.

According to the scheme, firm and reliable connection is formed between the hanging strip and the bag body and between the hanging strip and the bag bottom, so that the flexible freight bag has excellent bearing capacity.

Optionally, providing a bag bottom reinforcement block at the first position, the second position, the third position and the fourth position; the parts of the first suspender and the second suspender, which are respectively sewed with the bag body, are provided with a bag body reinforcing block and a reinforcing belt, and the suspender is positioned between the bag body reinforcing block and the reinforcing belt.

According to this scheme, bag bottom reinforcing block, bag body reinforcing block and reinforcing tape have further improved the intensity of flexible freight bag.

Drawings

FIG. 1 shows a schematic view of a flexible container made by the flexible container sewing apparatus of the present utility model;

FIG. 2 shows a schematic bottom view of the bulk bag of FIG. 1;

FIG. 3 shows a schematic view of the bulk bag sewing device of the present utility model;

FIG. 4 shows a perspective view of the bulk bag sewing device of the present utility model;

FIG. 5 shows a perspective view of a strap sewing station of the bulk bag sewing device of the present utility model;

FIGS. 6A and 6B show schematic structural views of two harnesses;

FIGS. 7A-7D are schematic views showing a process of sewing a strap and a bag bottom;

FIG. 8 shows a perspective view of a handle cloth sewing station of the bulk bag sewing device of the present utility model;

fig. 9A to 9D are schematic views showing a process of sewing the hanging cloth.

Reference numerals:

1 a feeding port; 2 hanging strips; 3, bag bottom; 4, bag body; 5 hanging the cloth; 6, bag body reinforcing blocks; 7, reinforcing the belt; 8, reinforcing blocks at the bottom of the bag; 9, banding; 10 labels; 100 sewing devices; 200 detection means; 300 folding means; 400 stacking devices; 500 packing devices; 101 a suspender sewing machine; 102, a bag blanking machine; 103, a hanging belt bag bottom sewing machine; 104 a feeding opening blanking machine; 105 feed opening sewing machine; 106, a bag body blanking machine; 107 bag body material inlet sewing machine; 108 a bag body and bag bottom sewing machine; 109 bag body suspender sewing machine; 110 flexible freight bag disengaging machine; a 111 circular track; 112 main body tooling; 113 bag bottom transfer machine; 114 a sling positioning device; 201, a sling blanking machine; 202 hanging strip feeding rollers; 203 a first bag bottom reinforcing block blanking machine; 204 a second bag bottom reinforcing block blanking machine; 205 a first body reinforcing block blanking machine; 206 a second bag body reinforcing block blanking machine; 207 reinforcing belt blanking machine; 208 a third bag bottom reinforcing block blanking machine; 209 a first pocket bottom reinforcement panel sewing machine; 210 a second pocket bottom reinforcing block sewing machine; 211 a third bag bottom reinforcing block sewing machine; 212 a first body stiffener sewing machine; 213 a second bag body reinforcing block sewing machine; 214 reinforcing the belt sewing machine; 221 hanging a handle cloth sewing machine; 222 hanging a cloth wrapping machine; 223 support; 224 folder; 225 pinch roller; 226 grooves.

Detailed Description

In order to make the objects, aspects and advantages of the technical solution of the present utility model more clear, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present utility model. Unless otherwise indicated, terms used herein have the meaning common in the art. Like reference numerals in the drawings denote like parts.

Fig. 1 and 2 show a schematic structural view of a flexible container produced by a flexible container sewing apparatus according to the present utility model, wherein fig. 1 is a perspective view as a whole and fig. 2 is a partial perspective view from the bottom. The flexible freight bag mainly comprises a feeding hole 1, a hanging strip 2, a bag bottom 3 and a bag body 4, which can be made of PP materials. The feeding opening 1 and the bag body 4 are of hollow cylindrical structures, and the lower end of the feeding opening 1 is connected to the upper end of the bag body 4 to form an integrated hollow cylindrical structure. The lower end of the bag body 4 is closed by a circular bag bottom 3.

The number of the hanging strips 2 is two. The left and right end parts of each sling 2 are fixedly connected with the bag bottom 3, can be fixed along the diameter direction and form an included angle of 90 degrees, and are respectively reinforced and fixed by a bag bottom reinforcing block 8. The middle part of each sling 2 forms an inverse U-shaped lifting lug near the outer side of the upper port of the feeding hole 1, and a sling 5 is arranged on the lifting lug. The two side portions of each strap 2 between the middle portion and the two end portions are fixedly connected with the side faces of the bag body 4, respectively, and extend along the axial direction of the bag body 4, and the middle portion of each side of the strap 2 is fixedly reinforced with the bag body 4 by the bag body reinforcing block 6. The four ends of the two slings 2 are symmetrically arranged at the bag bottom 4 so that the four side parts are evenly arranged at equal intervals around the bag body 4.

In addition, the outside of feed inlet 1 still sets up ribbon 9 for tie up feed inlet 1. A further reinforcing band 7 may be provided on the outer side of the overlapping portion of the strap 2, the bag body 4 and the bag body reinforcing block 6 to further enhance the coupling strength. A label 10 can be arranged on the outer side of the bag body 4 to play a role in marking or warning. FIG. 1 illustrates some exemplary dimensions of a flexible container, but these dimensions are for reference only and are not limiting of the utility model.

When the flexible freight bag is used, the material is filled into the flexible freight bag through the upper opening of the feeding opening 1; then, the feeding port 1 is tied up through the binding belt 9 to realize sealing; the flexible freight bag can be lifted by the hanging belt 2, and particularly, the freight bag is lifted at the position of the hanging handle belt 5 for transferring operation. Because the strength of the hanging belt 2 and the bag body 4 is reliable, and the strength of the connecting part between the hanging belt and the bag body is reliable, safe transportation can be realized.

Fig. 3 shows a schematic view of the flexible container sewing device of the present utility model, which is used for assembling the material inlet 1, the hanging strip 2, the bag bottom 3, the bag body 4 and other components into a flexible container. The sewing device 100 mainly includes: a hanging strip sewing machine 101 for preprocessing the hanging strip 2, and sewing hanging strip 5, bag body reinforcing block 6, reinforcing band 7, bag bottom reinforcing block 8 and other parts thereon; a bag bottom blanking machine 102 for blanking the bag bottom 3; a strap bag bottom sewing machine 103 for sewing and connecting the prefabricated strap 2 with the bag bottom 3 to obtain a strap bag bottom assembly; a loading port blanking machine 104 for blanking the loading port 1 to the tool main body; the feed opening sewing machine 105 is used for hemming and sewing the feed opening 1 and the binding belt 9; a bag body blanking machine 106 for blanking the bag body 4 to the tool main body; the bag body feed port sewing machine 107 is used for sewing and connecting the feed port 1 with the bag body 4 to form a bag body feed port assembly; the bag body and bag bottom sewing machine 108 is used for sewing and connecting the bag body and bag bottom assembly and the bag body and bag bottom assembly, in particular to sewing and connecting the bag body and the bag bottom; a bag body sling sewing machine 109 for sewing and connecting the sling 2 with the bag body 4 to obtain a finished container bag; and a flexible container disengaging machine 110 for disengaging the sewn flexible container from the main body tool.

Fig. 4 shows a perspective view of the bulk bag sewing device 100 of the present utility model. The sewing device 100 has a material transporting device including an endless track 111 and a main body tool 112 capable of circulating along the endless track 111. The upper side of the main body tooling 112 is a cylindrical supporting structure for sleeving and supporting thereon the cylindrical feeding port 1 provided by the feeding port blanking machine 104 and the cylindrical bag body 4 provided by the bag body blanking machine 106. The lower side of the main body tooling 112 is provided with a driving mechanism, which comprises a rotation driving mechanism (such as a gear set mechanism) for driving the main body tooling 112 to perform rotation motion, and a movement driving mechanism (such as a gear rack mechanism) for driving the main body tooling 112 to move along the annular track 111. The utility model is not limited to the specific form of the rotary drive mechanism and the mobile drive mechanism, and any drive mechanism capable of realizing the corresponding movement form falls into the protection scope of the utility model. In addition, the main body tooling 112 may include a plurality of tension sheets that can be expanded and contracted, and can be switched between a state of being far away from each other and a state of being close to each other by the electric push rod, so that the main body tooling 112 is switched between an expanded state and a contracted state, the main body tooling 112 has a larger diameter in the expanded state to tightly support the bag body and the feeding port thereon, and has a smaller diameter in the contracted state to release the tightening force, so as to facilitate separation of the flexible container. The number of body tooling 112 may be plural to process multiple bulk bags simultaneously.

The main body tooling 112 circularly moves along the annular track 111 and sequentially passes through five stations: the bag body and bottom sewing machine comprises a blanking opening blanking station A, a bag body blanking sewing station B, a bag body and bottom sewing station C, a bag body suspender sewing station D and a flexible freight bag separating station E. Fig. 4 shows five main body tools 112 at each station.

At the blanking station a of the blanking port, a blanking machine 104 of the feeding port is arranged above the blanking station a for outputting materials from a scroll in a flattened state, the materials are switched into a cylinder shape above the main body tooling 112 and sleeved on the main body tooling 112, and then the materials are cut off in a preset length through a hot melting device to form the feeding port 1. An air claw is arranged below the feeding hole blanking machine 104 and is used for pulling the feeding hole 1 from top to bottom to enable the feeding hole 1 to advance to a desired position. A feed port sewing machine 105 is arranged at the side of the station a. On the one hand, the feed port sewing machine 105 is capable of hemming the upper end edge of the feed port 1 supported on the main body tooling 112 (the term "hemming" in the present utility model means that the sewing portion is folded first and then the sewing thread is applied to improve the sewing strength; preferably, the hemming may be performed after being folded twice and then the sewing thread is applied); on the other hand, the feed opening sewing machine 105 can move from top to bottom for sewing the band 9 at a position in the middle of the feed opening 1. After hemming and binding are completed, the air claw pulls the stitched feed opening 1 downwards to a proper position of the main body tooling 112, so that the air claw is convenient to be in butt joint with the subsequent bag body 4. Then, the main body tooling 112 moves to the next station B.

At the bag body blanking sewing station B, a bag body blanking machine 106 is arranged above the bag body blanking sewing station B and is used for outputting materials from a scroll in a flattening state, switching the materials into a cylinder shape above a main body tool 112 and sleeving the materials on the main body tool 112, and cutting the materials with a preset length through a hot melting device to form the bag body 4. An air claw is provided below the bag body blanking machine 106 for pulling the bag body 4 from the top down to advance to a desired position. A bag body feed port sewing machine 107 is arranged on the side of the station B. The bag body upper feed opening sewing machine 107 can perform hemming sewing on the bag body 4 and the feed opening 1, so that the lower end edge of the bag body 4 is in sewing connection with the lower end edge of the feed opening 1. Then, the main body tooling 112 moves to the next station C.

And a bag bottom transferring machine 113 is arranged above the bag body blanking and sewing station C and is used for transferring the prefabricated bag bottom hanging strip assembly onto the main body tool 112. A bag body and bottom sewing machine 108 is arranged at the side of the station C. The bag body and bag bottom sewing machine 108 is capable of hemming the bag body 4 and the bag bottom 3 so that the upper end edge of the bag body 4 is sewn and connected with the outer peripheral edge of the bag bottom 3. Then, the main body tooling 112 moves to the next station D.

At the bag body sling sewing station D, a sling positioning device 114 is provided for straightening down the naturally drooping sling so as to attach to the bag body 4. A bag body strap sewing machine 109 is provided on the side of the station D. The bag body strap sewing machine 109 sews the bag body 4 and the strap 2, and particularly sews the pre-sewn bag body reinforcing block 6 and the reinforcing tape 7 on the strap 2 at a predetermined position on the bag body 4 as shown in fig. 2, thereby completing the assembly of the flexible container. Then, the main body tooling 112 moves to the next station E.

At the flexible container disengaging station E, a flexible container disengaging machine 110, which may be a movable air jaw structure, is disposed above the flexible container disengaging machine for separating the assembled flexible container from the main body tooling 112, the separated flexible container can be transferred to the downstream of the production line, and the main body tooling 112 will circulate back to the blanking station a of the blanking port for the next working cycle.

Fig. 4 also shows a strap sewing machine 101, a bag bottom blanking machine 102 and a strap bag bottom sewing machine 103 for the prefabricated bag bottom strap assembly, which are arranged linearly, outside the annular track 111. The strap sewing machine 101 is used for processing and sewing the entire strap 2, sewing the strap 2 with the bag body reinforcing block 6, the reinforcing band 7 and the bag bottom reinforcing block 8 by using a plurality of sewing machines, and sewing the strap 2 with the handle cloth 5. The bag bottom blanking machine 102 is used for blanking a round bag bottom 3 from a roll of material, which has an annular cutting tool. The strap bottom sewing machine 103 is used to stitch the strap 2 to the bottom 3, and in particular to stitch the pre-sewn bottom reinforcement piece 8 on the strap 2 to a predetermined location on the bottom 3, as shown in fig. 2, to obtain the bottom strap assembly described above.

Fig. 5 shows a perspective view of the strap sewing machine 101. The strap sewing machine 101 includes a strap blanking machine 201 that continuously conveys out an initial strap 2. At the output of the strap blanking machine 201, a cutter is provided for cutting the strap 2 of the desired length. Two sling feed rollers 202 are provided at both ends for supporting and transporting the sling 2. Between the two hanging belt feed rollers 202, a first bag bottom reinforcing block blanking machine 203, a second bag bottom reinforcing block blanking machine 204, a first bag body reinforcing block blanking machine 205, a second bag body reinforcing block blanking machine 206, a reinforcing belt blanking machine 207 and a third bag bottom reinforcing block blanking machine 208 are sequentially arranged from left to right. The first, second, and third bag bottom reinforcement block blanking machines 203, 204, 208 convey the respective bag bottom reinforcement blocks to below the hanging strip 2 in a direction perpendicular to the advancing direction of the hanging strip 2. At the output of the first, second and third bottom reinforcement piece blanking machines 203, 204, 208, respective cutting machines are also provided for cutting out the desired length of bottom reinforcement pieces 8. On opposite sides of the first, second, and third bottom reinforcement piece blanking machines 203, 204, 208, respective first, second, and third bottom reinforcement piece sewing machines 209, 210, 211 are also provided for sewing the bottom reinforcement pieces 8 to the straps 2.

The first and second body reinforcing block discharging machines 205, 206 are used to convey the respective body reinforcing blocks 6 to below the hanging strip 2 in a direction perpendicular to the advancing direction of the hanging strip 2. At the output of the first and second body reinforcing block blanking machines 205, 206, respective cutting machines are provided for cutting out the body reinforcing blocks 6 of a desired length. On opposite sides of the first and second body reinforcing piece blanking machines 205, 206, respective first and second body reinforcing piece sewing machines 212, 213 are also provided for sewing the body reinforcing pieces 6 to the strap 2.

The reinforcing tape unloader 207 is for conveying the reinforcing tape 7 to above the hanging tape 2 in a direction perpendicular to the advancing direction of the hanging tape 2, and the reinforcing tape 7 will sandwich the hanging tape 2 with the bag body reinforcing block 6. A corresponding cutter is also provided at the output of the reinforcing strip blanking machine 207 for cutting out the reinforcing strips 7 of the desired length. On the opposite side of the reinforcement belt blanking machine 207, a corresponding reinforcement belt sewing machine 214 is also provided for sewing the reinforcement belt 7 to the harness 2.

Fig. 6A and 6B show schematic views of two slings 2 of a flexible freight bag, the two slings 2 being structurally different, a first sling 21 having three bottom reinforcing blocks 8 at two ends and a middle portion, and a second sling 22 having only one bottom reinforcing block 8 at a middle portion. Specifically, as shown in fig. 6A, the first hanging strip 21 is provided in this order from right to left: the first reinforcing strip 71 and the second reinforcing strip 72 are overlapped with the first body reinforcing block 61 and the second body reinforcing block 62 and are arranged on the opposite sides of the hanging strip 2, and the first body reinforcing block 81, the first body reinforcing block 61, the second body reinforcing block 62, the second body reinforcing block 82 and the third body reinforcing block 83 are arranged on the second end of the hanging strip 21. As shown in fig. 6B, the second hanging strip 22 is provided in order from right to left: the third body reinforcing block 63, the fourth body reinforcing block 64, and the fourth bottom reinforcing block 84, wherein the third reinforcing band 73 and the fourth reinforcing band 74 are overlapped with the third body reinforcing block 63 and the fourth body reinforcing block 64, and are disposed opposite to each other on the front and back sides of the hanging strip 2. Neither end position of the second strap 22 is provided with a bag bottom reinforcement block.

During processing, the strap sewing machine 101 alternately manufactures the first strap 21 and the second strap 22.

The first strap 21 is processed as follows. Referring to fig. 5, first, a harness blanking machine 201 conveys an initial harness 2 to a designated position; then, the first bottom reinforcing block blanking machine 203, the second bottom reinforcing block blanking machine 204, the first body reinforcing block blanking machine 205, the second body reinforcing block blanking machine 206, and the third bottom reinforcing block blanking machine 208 are respectively blanked, and then the corresponding reinforcing blocks are cut, and the reinforcing blocks are sewn to the hanging strip 2; then, the strap feeding roller 202 is started to transfer the already-sewn first bag body reinforcing block 61 to the position of the reinforcing tape discharging machine 207, the reinforcing tape discharging machine 207 conveys the first reinforcing tape 71 to above the first bag body reinforcing block 61 and the strap 2, and then cuts the first reinforcing tape 71 and sews it to the strap 2; the operation is then repeated, with the second reinforcing tape 72 being sewn to the already sewn second body reinforcing panel 62. Thus, the processing of the first strap 21 is completed, followed by the processing of the second strap 22.

The second strap 22 is processed as follows. Referring to fig. 5, first, a harness blanking machine 201 conveys an initial harness 2 to a designated position; then, the second bag bottom reinforcing block blanking machine 204, the first bag body reinforcing block blanking machine 205, and the second bag body reinforcing block blanking machine 206 are respectively blanked (note that the first and third bag bottom reinforcing block blanking machines 203, 208 are not operated at this time), and then the corresponding reinforcing blocks are cut, and the reinforcing blocks are sewn to the hanging strip 2; then, the strap feeding roller 202 is started to transfer the third reinforcement piece 623 that has been sewn to the position of the reinforcement belt blanking machine 207, the reinforcement belt blanking machine 207 conveys the third reinforcement belt 73 to above the third reinforcement piece 63 and the strap 2, and then cuts the third reinforcement belt 73 and sews it to the strap 2; the operation is then repeated with the fourth reinforcing strip 74 stitched over the already stitched fourth body reinforcing ply 64. In this way, the processing of the second sling 22 is completed, immediately after which the next first sling 21 is processed, and so on.

Figures 7A-7D show schematic views of a hanging cloth sewing station and a sling bag bottom sewing station in the sewing apparatus 100. As shown in fig. 7A, at a position immediately downstream of the strap sewing machine 101, a bag bottom fixture 220 having a circular upper support surface for supporting thereon the circular bag bottom 3 is provided. Further, the bag bottom tooling 220 is rotatable about its axis. The strap bag bottom sewing machine 103 is disposed above the bag bottom tooling 220, as shown in fig. 3, which may be two parallel disposed sewing machines for sewing the strap 2 to the bag bottom 3 at the location of the bag bottom stiffener 8 thereon. Four centrally symmetrical positions of A, B, C, D are shown, corresponding to the four sewing positions of the bag bottom reinforcement block 8.

First the first strap 21 is sewn. As shown in fig. 7A, the first strap 21 is conveyed forward, and when the first bag bottom reinforcing block 81 at the first end of the strap 21 reaches the a position of the bag bottom tooling 220, the strap bottom sewing machine 103 operates to sew the bag bottom 3 with the first bag bottom reinforcing block 81. Thereafter, the first strap 21 continues to be conveyed forward while the bag bottom tooling 220 begins to rotate counterclockwise. When the first strap 21 is transported to a certain position, as shown in fig. 7B, the transportation of the strap is stopped and the bag bottom tool 220 stops rotating, at this time, the portion of the first strap 21 located between the two bag body reinforcing blocks 61 and 62 proceeds to the position of the handle cloth sewing machine 221, and the handle cloth sewing machine 221 is a portion of the strap sewing machine 101 located between the position of the third bag bottom reinforcing block blanking machine 208 (i.e., the station where the first bag bottom reinforcing block 81 is sewn) and the bag bottom tool 220 for wrapping and sewing the handle cloth 5 outside the portion of the first strap 21, which portion will form one lifting lug of the flexible bag. After the sewing of the handle cloth 5 is completed, the first hanging strip 21 continues to be conveyed forward, and at the same time, the bag bottom tooling 220 continues to rotate counterclockwise, and when the bag bottom tooling rotates to 270 ° (relative to the initial position of fig. 7A), as shown in fig. 7C, the second bag bottom reinforcing block 82 located at the middle part and the third bag bottom reinforcing block 83 located at the second end part on the first hanging strip 21 reach two positions B, D, respectively. Subsequently, the strap bottom sewing machine 103 operates to sew the bottom 3 with the second and third bottom reinforcing blocks 82, 83. At this time, the sewing of the first strap 2 to the bag bottom 3 is completed.

The second strap 22 is then sewn, the process flow of which is substantially identical to that of the first strap 21, only the differences being described below. The second strap 22 is fed forward and stopped when its end (note that there is no bottom stiffener but corresponds to the position of the first bottom stiffener 81 on the first strap 21) reaches the D position of the bottom tooling 220, the strap bottom stitching machine 103 operates to stitch the bottom 3 with the end of the second strap 22 at position D where there is a third bottom stiffener 83 on the first strap 21. Thereafter, the second strap 22 continues to be conveyed forward while the bag bottom tooling 220 begins to rotate clockwise. When the second strap 22 is transported to a certain position, the transportation of the strap is stopped and the bag bottom tool 220 stops rotating, at which time the portion of the second strap 22 between the two bag body reinforcing blocks 63 and 64 travels to the position of the handle cloth sewing machine 221, the handle cloth sewing machine 221 wraps and sews the handle cloth 5 outside this portion of the second strap 22, which will form the other lifting lug of the flexible container. After the sewing of the handle cloth 5 is completed, the second suspender 22 continues to be conveyed forward while the bag bottom fixture 220 continues to rotate clockwise, and when rotated to 270 ° (relative to the initial position of fig. 7C), as shown in fig. 7D, the fourth bag bottom reinforcement block 84 on the second suspender 22 reaches the C position, while at the same time, the other end of the second suspender 22 (note that there is no bag bottom reinforcement block thereon, but corresponds to the position of the third bag bottom reinforcement block 83 on the first suspender 21) reaches the a position of the bag bottom fixture 220. Subsequently, the strap bottom sewing machine 103 operates to sew the bottom 3 at positions C and a with the fourth bottom reinforcing block 84 and the other end of the second strap 22, respectively. Processing of the bag bottom strap assembly is now complete, which will be transported by the bag bottom transport machine 113 to the main body tooling 112 as described above. Thereafter, the bag bottom tool 220 is emptied, receives the next bag bottom 3, and performs the next bag bottom strap assembly process.

It should be noted that while the above description is directed to the different harnesses shown in fig. 6A and 6B, it is merely one preferred and exemplary embodiment of the present utility model, and the present utility model is not limited thereto. Other strap bottom attachment schemes may be achieved by those skilled in the art based on the teachings of the present utility model, for example, the two straps may be identical in structure, each having two bottom reinforcing blocks, one at the end and one in the middle, both located on the same side as the two body reinforcing blocks, or on opposite sides; for another example, the two straps may each be in the form of three bottom reinforcing blocks as shown in FIG. 6A, or one bottom reinforcing block as shown in FIG. 6B. The above variants can all fall within the scope of the utility model.

Fig. 8 shows a schematic view of a handle cloth sewing station. A handle cloth sewing machine 221 and a handle cloth wrapping machine 222 are provided at the station. The handle cloth sewing machine 221 is movable along the rail in three orthogonal directions, i.e., a vertical direction, a direction parallel to the hanging strip, and a direction perpendicular to the hanging strip. The handle cloth wrapping machine 222 includes a supporter 223, a folder 224, and a pinch roller 225. As shown in fig. 9A, the support 223 is a flat plate-shaped member extending in the strap arrangement direction, and an upper surface thereof is used to support the strap 2. The supporter 223 is provided with a groove 226 at the middle thereof. Two folders 224 are hinged at both edges of the support 223.

Fig. 9B shows that the handle cloth 5 is supplied to the surface of the support 223, the hanging strip 2 is supplied above the handle cloth 5, and the handle cloth 5 has a middle portion located below and overlapping the hanging strip 2, and two side wing portions located beyond the hanging strip 2 on both sides of the middle portion and located above the folder 224. In the state of fig. 9B, the driving mechanism is operable to drive the two folders 224 to fold upward, the ends of the folders 224 pushing the two side wing portions to move over the harness 2. Fig. 9C shows the folded state, with the edges of the two side wing portions abutting, covering the top of the sling 2, whereby the sling 5 completely wraps the upper and lower surfaces of the sling 2. The folder 224 is then reset.

The pinch roller 225 shown in fig. 8 is then driven to move to the gap between the two wing portions and descends to push the middle portion of the sling 2 with the sling cloths 5 on both sides into the grooves 226 of the support 223, doubling the sling 2 back. The driving pinch roller 225 can move in the groove 223 along the direction of the hanging strip 2, so that the hanging strip 2 is folded in half integrally. The folded hanging strip 2 forms a six-layer laminated structure, the 1 st, 3 rd, 4 th and 6 th layers are hanging strip 5, and the 2 nd and 4 th layers are hanging strip 2, as shown in figure 9D. The handle cloth sewing machine 221 starts a work, and a sewing thread is applied to a substantially middle position of the folded strap 2 to stitch the handle cloth 5 and the strap 2 of the six-layer laminated structure together. Based on the six-layer laminated and stitched structure, the strength of the hanging strip 2 and the hanging handle cloth 5 is obviously enhanced.

The exemplary embodiments of the present utility model have been described in detail herein with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above without departing from the spirit of the utility model, and various technical features and structures of the present utility model may be variously combined without departing from the scope of the present utility model, which is defined by the appended claims.

Claims (16)

1. A flexible freight bag sewing device, comprising:

the hanging belt sewing machine is used for blanking and sewing hanging belts, and the hanging belts are provided with opposite first end parts, second end parts and middle parts positioned between the first end parts and the second end parts;

a bag bottom blanking machine which blanking the bag bottom;

a suspender bag bottom sewing machine for sewing the bag bottom and the suspender;

a bag bottom tool which supports the bag bottom and can rotate between a first orientation and a second orientation,

in a first orientation, the strap bag bottom sewing machine sews a first end of the strap to a first position of the bag bottom;

in a second orientation, the strap bag bottom sewing machine sews the intermediate portion and the second end portion of the strap to the second and third positions of the bag bottom, wherein the center, second and third positions of the bag bottom are collinear and the strap portion between the first end portion and the intermediate portion forms a lifting tab of the flexible container.

2. The flexible container sewing apparatus according to claim 1, wherein,

the bag bottom tooling is configured to rotate 270 degrees from a first orientation to a second orientation.

3. The flexible container sewing apparatus according to claim 1, wherein,

the first position, the second position and the third position occupy three of four centrally symmetric positions of the bag bottom tooling.

4. A flexible freight bag sewing device, comprising:

a sling sewing machine that feeds and sews a sling, the sling including a first sling and a second sling each having opposite first and second ends and a middle portion therebetween;

a bag bottom blanking machine which blanking the bag bottom;

a suspender bag bottom sewing machine for sewing the bag bottom and the suspender;

the bag bottom tool supports the bag bottom and can rotate;

the bag bottom tooling is configured to rotate in a first rotation from a first orientation in which the strap bag bottom sewing machine sews a first end of the first strap to a first position of the bag bottom to a second orientation in which the strap bag bottom sewing machine sews a middle portion and a second end of the first strap to a second position and a third position of the bag bottom, wherein the center, second position and third position of the bag bottom are collinear, and a strap portion between the first end and the middle portion of the first strap forms a first lifting lug of the flexible container;

the bag bottom tooling is configured to rotate in a second rotation from a second orientation in which the strap bag bottom sewing machine sews a first end of the second strap to a third position of the bag bottom to a first orientation in which the strap bag bottom sewing machine sews a middle portion and a second end of the second strap to a fourth position and a first position of the bag bottom, wherein the center, the first position, and the fourth position of the bag bottom are collinear, and a strap portion between the first end and the middle portion of the second strap forms a second lifting tab of the flexible container.

5. The flexible container sewing apparatus according to claim 4, wherein,

the bag bottom tooling is configured to rotate 270 degrees counter-clockwise from a first orientation to a second orientation in a first rotation; and is also provided with

The bag bottom tooling is configured to rotate 270 degrees clockwise from the second orientation to the first orientation in a second rotation.

6. The flexible container sewing apparatus according to claim 4, wherein,

the first position, the second position, the third position and the fourth position occupy four central symmetry positions of the bag bottom tool.

7. The flexible container sewing apparatus according to any of claims 4 to 6, wherein,

the sling sewing machine is configured to stitch a bag bottom reinforcing block at a first end, a middle portion, and a second end of a first sling; and, the strap sewing machine is configured to stitch the bag bottom reinforcement block at a middle portion of the second strap.

8. The flexible container sewing apparatus according to any of claims 4 to 6, wherein,

for each of the first and second straps, the strap sewing machine is configured to stitch the bag body reinforcing block on one side and the reinforcing band on the other side at two locations between its respective first end and middle location.

9. The flexible container sewing apparatus of claim 8,

the suspender sewing machine comprises two bag body reinforcing block sewing stations and one reinforcing belt sewing station, wherein the two bag body reinforcing block sewing stations are respectively used for sewing a first bag body reinforcing block and a second bag body reinforcing block, the sewn first bag body reinforcing block and second bag body reinforcing block sequentially advance to the reinforcing belt sewing station, and the respective reinforcing belts are sewn at the stations.

10. The flexible container sewing apparatus of claim 8,

for each of the first strap and the second strap, the strap sewing machine is configured to wrap and sew a handle cloth on an outer side of the strap between the two portions.

11. The flexible container sewing apparatus of claim 10,

the hanging strip sewing machine comprises a hanging strip sewing machine and a hanging strip wrapping machine, wherein the hanging strip wrapping machine is configured to wrap hanging strip on the upper side and the lower side of the hanging strip, and the hanging strip sewing machine is configured to stitch the hanging strip and the hanging strip.

12. The flexible container sewing apparatus of claim 11,

the handle cloth wrapping machine comprises a support and a folder, wherein the support supports a hanging belt and handle cloth, the middle part of the handle cloth is positioned below the hanging belt and coincides with the hanging belt, the two side wing parts exceed the middle part, and the folder is configured to rotate relative to the support and push the two side wing parts to move to the upper part of the hanging belt in the rotating process.

13. The flexible container sewing apparatus of claim 12, wherein,

the sling cloth wrapping machine further comprises a pinch roller configured to press the sling and a portion of 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 laminated structure, wherein the second and fifth layers are the sling, and the rest layers are the sling cloth.

14. A flexible container, characterized in that it is manufactured by the flexible container sewing device according to any one of claims 1 to 13.

15. A flexible freight bag, comprising:

the bag comprises a bag body, a bag bottom, a first hanging strip and a second hanging strip;

the first sling and the second sling each have opposite first and second ends and a middle portion therebetween;

wherein the first end of the first strap is sewn to the first location of the bag bottom, the middle portion and the second end of the first strap are sewn to the second location and the third location of the bag bottom, wherein the center of the bag bottom, the second location and the third location are collinear, the strap portion between the first end and the middle portion of the first strap is sewn to the bag body and forms a first lifting lug of the flexible container;

wherein the first end of the second strap is sewn to the third location of the bag bottom, the middle portion and the second end of the second strap are sewn to the fourth location and the first location of the bag bottom, wherein the center of the bag bottom, the first location and the fourth location are collinear, and the strap portion between the first end and the middle portion of the second strap is sewn to the bag body and forms a second lifting lug of the flexible container.

16. The flexible container according to claim 15, wherein,

the first position, the second position, the third position and the fourth position are provided with bag bottom reinforcing blocks;

the parts of the first suspender and the second suspender, which are respectively sewed with the bag body, are provided with a bag body reinforcing block and a reinforcing belt, and the suspender is positioned between the bag body reinforcing block and the reinforcing belt.

Images