CN111055541A - Rope threading machine - Google Patents
Rope threading machine Download PDFInfo
- Publication number
- CN111055541A CN111055541A CN201911390099.XA CN201911390099A CN111055541A CN 111055541 A CN111055541 A CN 111055541A CN 201911390099 A CN201911390099 A CN 201911390099A CN 111055541 A CN111055541 A CN 111055541A
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- rope
- cylinder
- bag
- positioning
- clamping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/86—Forming integral handles or mounting separate handles
- B31B70/864—Mounting separate handles on bags, sheets or webs
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- Supplying Of Containers To The Packaging Station (AREA)
Abstract
The invention discloses a stringing machine, which belongs to machining equipment and comprises a bag conveying and positioning mechanism, a rope end moving and positioning mechanism, a rope end inserting mechanism, a bag opening mechanism and a rope end sucking mechanism. The stringing machine provided by the invention is suitable for bags in various forms, has the actions of automatic positioning, automatic opening, automatic rope feeding, automatic rope inserting, automatic rope drawing and the like, can thoroughly realize the full-automatic stringing work of the bags, greatly reduces the amount of manual labor while improving the production efficiency, and has uniform quality of the produced stringing bags.
Description
Technical Field
The invention belongs to machining equipment, and particularly relates to a rope threading machine.
Background
With the development of society, bags such as paper bags and plastic bags have become daily necessities in people's lives, and various bags are used not only for packaging but also for transporting goods. At this stage, the demand and throughput of bags is extremely high. However, for the hand bags and the packaging bags needing to be threaded, the threading work is still finished manually, the manual threading work is not only low in efficiency, but also the quality cannot be guaranteed, and how to realize the automatic threading work has great significance for improving the production quality and efficiency and reducing the production cost.
Disclosure of Invention
In view of the above, the invention provides a stringing machine suitable for bags of various forms, which has the actions of automatic positioning, automatic opening, automatic rope feeding, automatic rope inserting, automatic rope drawing and the like, can thoroughly realize the full-automatic stringing work of the bags, greatly reduces the amount of manual labor while improving the production efficiency, and ensures that the produced stringing bags have uniform quality.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a stringing machine comprises a bag conveying and positioning mechanism, a rope end moving and positioning mechanism, a rope end inserting mechanism, a bag opening mechanism and a rope end drawing-in mechanism, wherein: the bag conveying and positioning mechanism is used for conveying and positioning bags; the rope head moving and positioning mechanism is used for providing ropes required by rope threading work for the rope head inserting mechanism, and comprises a guide sleeve and a rope pressing device for guiding the movement of the ropes, a fixed clamping cylinder for fixing the ropes, a cutting cylinder for cutting the ropes, a rope head clamping cylinder for clamping the rope heads and a rope pulling moving cylinder for moving the rope head clamping cylinder, wherein the rope heads sequentially penetrate through the guide sleeve, the rope pressing device, the fixed clamping cylinder and the cutting cylinder and then are clamped by the fixed clamping cylinder, and the rope head clamping cylinder can slide back and forth along the guide rail under the driving of the rope pulling moving cylinder; the rope end inserting mechanism is used for holding the cut rope and inserting rope ends at two ends of the rope into the bag and comprises a rotating cylinder, a rope end clamping cylinder and an inserting cylinder, the rope end clamping cylinder is used for clamping the rope end, the inserting cylinder can drive the rope end clamping cylinder to move up and down, and the rotating cylinder can drive the rope end clamping cylinder and the inserting cylinder to rotate; the bag opening mechanism comprises a bag opening block and a front-and-back moving cylinder, the bag opening block is of a wedge-shaped structure, the wedge-shaped structure can extend into the bag and is used for separating an upper layer and a lower layer of the bag, and the front-and-back moving cylinder is used for driving the bag opening block to move along the guide rail; the rope end suction mechanism is used for drawing the rope end inserted into the bag, and comprises a rope end clamp used for clamping the rope end, a connecting rod used for driving the rope end clamp to swing around a bearing, a suction clamping cylinder used for driving the rope end clamp to work and a suction moving cylinder used for the connecting rod to move.
Preferably, the bag conveying and positioning mechanism comprises a belt conveyor for conveying bags, a length positioning block for longitudinally positioning the bags and a width positioning baffle for transversely positioning the bags, the length positioning block is mounted on one side of the belt conveyor through a support, and the width positioning baffle is mounted above the belt conveyor through an up-and-down moving cylinder on the support.
Preferably, the inner end of the wedge-shaped structure is provided with a step surface, and the step surface is used for pushing the bag to move to the length positioning block for positioning.
Preferably, the rope end suction mechanism can move back and forth along the guide rail under the driving of the front and rear moving cylinders.
Preferably, the rope end clamp is rotatably installed on the bearing, one end of the rope end clamp is used for clamping a rope end, the other end of the rope end clamp is connected with the suction moving cylinder through the connecting rod, and the rope end can be further drawn out from the through hole by the rope end clamp under the driving of the suction moving cylinder.
The rope threading machine has the following beneficial effects:
the stringing machine is suitable for various bags including paper bags, plastic bags, packaging bags and the like. The stringing machine has the advantages that the stringing machine has the actions of automatic positioning, automatic opening, automatic rope feeding, automatic rope inserting, automatic rope drawing and the like, can thoroughly realize full-automatic stringing work of bags, greatly reduces the amount of manual labor when improving the production efficiency, and produces stringing bags with uniform quality. Wherein: the bag conveying and positioning mechanism can automatically convey the bags and automatically position the bags, so that the displacement in the threading process is avoided; the rope head moving and positioning mechanism can continuously feed and cut the rope, and provides a rope section with a proper size for rope threading work; the rope end inserting mechanism and the rope end moving and positioning mechanism work in a matched mode, the direction of the rope section can be adjusted after the rope section is clamped, the rope section is driven to rotate and move, and the rope section is inserted into the bag; the bag opening mechanism adopts a unique design and can automatically open the bag to separate two layers of the bag; the rope end suction mechanism is connected with the rope end insertion mechanism and then works, and the purpose is to further pull the inserted rope end to ensure that the rope cannot fall off.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of the structure of the bag opening mechanism and the string drawing mechanism of the present invention;
FIG. 4 is a schematic view showing the structure of a rope end moving positioning machine and a rope end inserting mechanism according to the present invention;
FIG. 5 is a schematic structural view of a rope end moving and positioning mechanism according to the present invention;
FIG. 6 is a schematic view showing the operation of the rope end moving and positioning mechanism of the present invention;
FIG. 7 is a schematic view of the rope end insertion mechanism according to the present invention;
fig. 8 is a schematic view showing a first operation of the rope end insertion mechanism according to the present invention;
fig. 9 is a schematic view showing a second operation of the rope end inserting mechanism according to the present invention;
fig. 10 is a third operation of the rope end inserting mechanism according to the present invention;
FIG. 11 is a schematic view of the rope end suction mechanism according to the present invention;
fig. 12 is a schematic view showing a first operation of the rope end suction mechanism according to the present invention;
FIG. 13 is a schematic view showing a second operation of the rope end suction mechanism according to the present invention;
fig. 14 is a third operation of the rope end suction mechanism according to the present invention.
In the figure, 1-a rope pulling moving cylinder, 2-a rope end clamping cylinder, 3-a rotating cylinder, 4-a rope end clamping cylinder, 5-an inserting cylinder, 6-a shearing cylinder, 7-a rope pressing device, 8-a guide sleeve, 9-an opening and rope end drawing mechanism rack, 10-a rope end inserting mechanism rack, 11-a belt conveyor, 12-a bag, 13-a bag opening expanding block, 14-a drawing clamping cylinder, 15-a drawing moving cylinder, 16-a back and forth moving cylinder, 17-a rotating shaft seat, 18-a rope end clamp, 19-a bearing, 20-a fixed clamping cylinder, 21-a rope end, 22-a rope, 23-a connecting rod, 24-a guide rail, 25-a length positioning block, 26-a width positioning baffle, 27-an up and down moving cylinder, 28-step surface.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, 2, 3 and 4, a stringing machine includes a bag conveying positioning mechanism, a string end moving positioning mechanism, a string end inserting mechanism, a bag opening mechanism and a string end drawing-in mechanism, wherein: the bag conveying and positioning mechanism is used for conveying and positioning bags 12, mainly comprise a belt conveyor 11 and a baffle positioned by matching with the belt conveyor 11, a rope 22 required by rope threading work is provided for a rope end insertion mechanism by the rope end moving and positioning mechanism, the rope 22 is pulled and cut, the rope end insertion mechanism is used for holding the rope 22 after cutting, the rope ends 21 at two ends of the rope 22 are inserted into the bag 12, a bag opening mechanism is mainly used for separating bags in a laminating state, the bag 12 can be opened through the mechanism so as to facilitate rope threading, the rope end suction mechanism is used for drawing the rope end 21 inserted into the bag 12, further drawing the rope, and the rope is prevented from falling off. In this implementation, the stringing machine includes 2 groups rope fastening mobile positioning mechanism and rope fastening insertion mechanism from top to bottom, and the bag opening mechanism is arranged between 2 groups rope fastening mobile positioning mechanism and rope fastening insertion mechanism.
As shown in fig. 1 and 2, the bag conveying and positioning mechanism comprises a belt conveyor 11 for conveying the bags 12, a length positioning block 25 for longitudinally positioning the bags 12 and a width positioning baffle 26 for transversely positioning the bags 12, the length positioning block 25 is mounted on one side of the belt conveyor 11 through a support, the width positioning baffle 26 is mounted above the belt conveyor 11 through an up-and-down moving cylinder 26 on the support, and after the rope threading work is completed, the width positioning baffle 26 moves upwards, and the paper bags which are finished in rope threading are conveyed away.
As shown in fig. 2 and 3, the bag opening mechanism includes a bag opening block 13 and a front-back moving cylinder 16, the bag opening block 13 is of a wedge-shaped structure, the wedge-shaped structure can extend into the bag 12 and is used for separating the upper layer and the lower layer of the bag 12, the front-back moving cylinder 16 is used for driving the bag opening block 13 to move along a guide rail 24, specifically, a step surface 28 is arranged at the inner end of the wedge-shaped structure, and the step surface 28 is used for pushing the bag 12 to move to a length positioning block 25 for positioning. In fig. 3, the rope end drawing mechanism is used for drawing the rope end 21 inserted into the bag 12, and the rope end drawing mechanism comprises a rope end clamp 18 for clamping the rope end 21, a connecting rod 23 for driving the rope end clamp 18 to swing around a bearing 19, a drawing clamping cylinder 14 for driving the rope end clamp 18 to work, and a drawing moving cylinder 15 for driving the connecting rod 23 to move.
As shown in fig. 4 and 5, the rope end moving and positioning mechanism includes a guide sleeve 8 and a rope pressing device 7 for guiding the movement of the rope 22, a fixing and clamping cylinder 20 for fixing the rope 22, a cutting cylinder 6 for cutting the rope 22, a rope end clamping cylinder 2 for clamping the rope end 21, and a rope moving cylinder 1 for moving the rope end clamping cylinder 2, wherein the rope end 21 sequentially passes through the guide sleeve 8, the rope pressing device 7, the fixing and clamping cylinder 20 and the cutting cylinder 6 to be fixed on the rope end clamping cylinder 2, the rope end clamping cylinder 2 can slide back and forth along the guide rail under the driving of the rope moving cylinder 1, specifically, the rope pressing device 7 is a two-roller device, and the rope 22 passes through a gap between the two rollers to limit the rope 22. In fig. 4, the rope end insertion mechanism comprises a rotary cylinder 3, a rope end clamping cylinder 4 and an insertion cylinder 5, the rope end clamping cylinder 4 is used for clamping the rope end 21, the insertion cylinder 5 can drive the rope end clamping cylinder 4 to move up and down, and the rotary cylinder 3 can drive the rope end clamping cylinder 4 and the insertion cylinder 5 to rotate. The rope end drawing mechanism can move back and forth along the guide rail 24 under the driving of the front and back moving air cylinder 16. As shown in fig. 7, the rope head clamp 18 is rotatably mounted on the bearing 19, one end of the rope head clamp 18 is used for clamping the rope head 21, the other end of the rope head clamp 18 is connected with the drawing moving cylinder 15 through the connecting rod 23, and the rope head 21 can be further drawn out of the through hole by the rope head clamp 18 driven by the drawing moving cylinder 15.
The specific working process of the invention is as follows:
1 bag moving and positioning process.
The bag 12 is moved forward by being placed on the belt conveyor 11, being stopped by the width positioning baffle 26 installed above the belt conveyor 11, with the long sides of the bag abutting against the width positioning baffle 26, thus positioning the bag in the width direction, a length positioning block 25 in the length direction is arranged at one side of the belt 11, while a moving bag opening block 13 at the other side opens the opening of the bag 12 by means of the inclined surface thereof when moving forwards, the bag is pushed to the length positioning block 25 by the step surface 28 of the opening block against the bag end, so that the length direction of the bag is positioned, and the rope belt can be arranged, when the rope 22 is loaded, the width positioning baffle 26 above the belt conveyor 11 is lifted up under the action of the up-down moving cylinder 27, the bag continues to move forward, the next bag 12 is fed, and the width positioning flap 26 is moved downward by the upward and downward movement cylinders 27 to position the new bag, and the above process is repeated.
2 moving and positioning process of the rope end.
The rope belt 22 from the heading machine passes through the guide sleeve 8 and the rope pressing device 7 to be clamped by the fixed clamping cylinder 20, at the moment, the rope fastening cylinder 2 clamps the rope head 21, the rope head 21 is pulled to the upper side and the lower side of the bag under the action of the rope pulling moving cylinder 1, the pulling distance is equal to the length of the rope belt, in the pulling process, the fixed clamping cylinder 20 is loosened, after the rope head is pulled to the position, the fixed clamping cylinder 20 clamps the rope head, after the rope head clamping cylinder 4 of the rope head inserting mechanism clamps the end of the rope, the rope head is cut by the cutting cylinder 6, the rope head fastening cylinder 2 is loosened, the rope head is moved forwards to the end of the fixed clamping cylinder 20 and then is pulled next, the processes are repeated, the whole process refers to fig. 5 and 6, the rope head fastening cylinder 2 clamps the rope head 21 in fig. 5, and in fig. 6, the rope head fastening cylinder 2 moves to the leftmost end.
3 the working process of the rope end inserting mechanism.
When the rope head 21 is pulled, the two rotary cylinders 3 respectively rotate 90 degrees up and down to enable the rope head clamping cylinder 4 to rotate to a vertical position, the rope head clamping cylinder is a finger cylinder, the clamping head just reaches the position of the rope head 21 to be clamped, the rope heads 21 at two ends of the rope are respectively clamped, the rope head clamping cylinder 2 is loosened, meanwhile, the cutting cylinder 6 cuts the rope head at the other end, the rotary cylinders 3 rotate 90 degrees to enable the finger cylinder to rotate to a horizontal position, at the moment, the distance between the two rope heads is just equal to the hole distance of the bag, the rope head is inserted into the bag under the work of the inserting cylinder 5, the inserting cylinder 5 is used for recycling, and the inserting process of the rope head is completed, and the whole process is shown in figures 8, 9 and 10.
4 bag opening and rope end suction process.
When a bag comes in, the bag opening expanding block 13, the suction moving cylinder 15, the suction clamping cylinder 14 and the like move forward under the pushing of the front moving cylinder 16 and the rear moving cylinder 16, the bag opening expanding block 13 and the rope end clamp 18 enter the bag together, the bag opening is expanded under the action of the inclined plane of the bag opening expanding block 13, the bag is positioned under the pushing of the step surface 28 of the expanding block, at the moment, the rope end suction mechanism simultaneously sucks the rope end into the bag, the rope end clamp 18 clamps the rope end inserted into the bag under the action of the suction clamping cylinder 14, then the suction moving cylinder 15 works to drive the connecting rod 23 to expand outwards, the rope end clamp 18 rotates inwards around the rotating shaft seat 17, so that the rope end 21 is sucked into the bag, the expanding block and the like exit from the bag, and the bag threading process is completed, and the whole process refers to fig. 11 to fig. 14, specifically, and the suction clamping cylinder 14 is a finger cylinder.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a stringing machine which characterized in that, includes that bag carries positioning mechanism, fag end removal positioning mechanism, fag end insertion mechanism, bag opening mechanism and fag end suction mechanism, wherein:
the bag conveying and positioning mechanism is used for conveying and positioning the bags (12);
the rope head moving and positioning mechanism is used for providing a rope (22) required by rope threading work for the rope head inserting mechanism, and comprises a guide sleeve (8) and a rope pressing device (7) which are used for guiding the rope (22) to move, a fixed clamping cylinder (20) which is used for fixing the rope (22), a cutting cylinder (6) which is used for cutting the rope (22), a rope head clamping cylinder (2) which is used for clamping the rope head (21) and a rope pulling moving cylinder (1) which is used for moving the rope head clamping cylinder (2), wherein the rope head (21) sequentially penetrates through the guide sleeve (8), the rope pressing device (7), the fixed clamping cylinder (20) and the cutting cylinder (6) and then is clamped by the fixed clamping cylinder (20), and the rope head clamping cylinder (2) can slide back and forth along a guide rail under the driving of the rope pulling moving cylinder (1);
the rope end inserting mechanism is used for holding the cut rope (22) and inserting rope ends (21) at two ends of the rope (22) into the bag (12), the rope end inserting mechanism comprises a rotating cylinder (3), a rope end clamping cylinder (4) and an inserting cylinder (5), the rope end clamping cylinder (4) is used for clamping the rope ends (21), the inserting cylinder (5) can drive the rope end clamping cylinder (4) to move up and down, and the rotating cylinder (3) can drive the rope end clamping cylinder (4) and the inserting cylinder (5) to rotate;
the bag opening mechanism comprises a bag opening block (13) and a front-and-back moving cylinder (16), the bag opening block (13) is of a wedge-shaped structure, the wedge-shaped structure can extend into the bag (12) and is used for separating an upper layer and a lower layer of the bag (12), and the front-and-back moving cylinder (16) is used for driving the bag opening block (13) to move along a guide rail (24);
the rope end drawing mechanism is used for drawing the rope end (21) inserted into the bag (12), and comprises a rope end clamp (18) used for clamping the rope end (21), a connecting rod (23) used for driving the rope end clamp (18) to swing around a bearing (19), a drawing clamping cylinder (14) used for driving the rope end clamp (18) to work and a drawing moving cylinder (15) used for driving the connecting rod (23) to move.
2. A stringing machine as claimed in claim 1, characterized in that the bag conveying and positioning mechanism comprises a belt conveyor (11) for conveying the bags (12), a length positioning block (25) for longitudinally positioning the bags (12) and a width positioning baffle (26) for transversely positioning the bags (12), the length positioning block (25) is mounted on one side of the belt conveyor (11) by means of a bracket, and the width positioning baffle (26) is mounted above the belt conveyor (11) by means of an up-and-down moving cylinder (26) on the bracket.
3. A stringing machine as claimed in claim 1, characterized in that the inner end of the wedge-shaped structure is provided with a step surface (28), the step surface (28) being used to push the bag (12) to move into the length-positioning block (25) position.
4. A reeving machine as claimed in claim 1, characterized in that said rope end suction means are movable back and forth along the guide rail (24) driven by the back and forth movement cylinders (16).
5. The stringing machine as claimed in claim 1, characterized in that the rope clamp (18) is rotatably mounted on a bearing (19), one end of the rope clamp (18) is used for clamping the rope (21), the other end of the rope clamp (18) is connected to the drawing-in displacement cylinder (15) via a connecting rod (23), and the rope clamp (18) can draw the rope (21) out of the through hole under the drive of the drawing-in displacement cylinder (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390099.XA CN111055541A (en) | 2019-12-30 | 2019-12-30 | Rope threading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911390099.XA CN111055541A (en) | 2019-12-30 | 2019-12-30 | Rope threading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111055541A true CN111055541A (en) | 2020-04-24 |
Family
ID=70304474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911390099.XA Pending CN111055541A (en) | 2019-12-30 | 2019-12-30 | Rope threading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111055541A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114379151A (en) * | 2021-12-31 | 2022-04-22 | 吴仕飞 | Three-dimensional bag threading device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009055305A1 (en) * | 2009-12-23 | 2011-06-30 | Vereinigte Papierwarenfabriken GmbH, 91555 | Paper carry bag producing system, has bag making station manufacturing carry bags that are transferred to conveyer system by delivery station, and handle manufacture station manufacturing handles connected with bags by joining station |
| CN207931173U (en) * | 2017-12-21 | 2018-10-02 | 汇源印刷包装科技（天津）股份有限公司 | A kind of bag of body wire rope handling equipment |
| CN109130312A (en) * | 2018-10-31 | 2019-01-04 | 温州临界科技有限公司 | A kind of negative pressure messenger mechanism of handbag threading machine |
| CN209141549U (en) * | 2018-11-22 | 2019-07-23 | 温州临界科技有限公司 | It is a kind of for cooperating the auxiliary manipulator of handbag threading machine wire rope handling |
-
2019
- 2019-12-30 CN CN201911390099.XA patent/CN111055541A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009055305A1 (en) * | 2009-12-23 | 2011-06-30 | Vereinigte Papierwarenfabriken GmbH, 91555 | Paper carry bag producing system, has bag making station manufacturing carry bags that are transferred to conveyer system by delivery station, and handle manufacture station manufacturing handles connected with bags by joining station |
| CN207931173U (en) * | 2017-12-21 | 2018-10-02 | 汇源印刷包装科技（天津）股份有限公司 | A kind of bag of body wire rope handling equipment |
| CN109130312A (en) * | 2018-10-31 | 2019-01-04 | 温州临界科技有限公司 | A kind of negative pressure messenger mechanism of handbag threading machine |
| CN209141549U (en) * | 2018-11-22 | 2019-07-23 | 温州临界科技有限公司 | It is a kind of for cooperating the auxiliary manipulator of handbag threading machine wire rope handling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114379151A (en) * | 2021-12-31 | 2022-04-22 | 吴仕飞 | Three-dimensional bag threading device |
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Application publication date: 20200424 |
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