Plastic turtle-shell net manufacturing equipment using AI technology

Abstract

To manufacture a plastic tortoiseshell net with high quality without depending on a skilled engineer by using an AI technology to automatically correct abnormally twisted portions that occur when right and left plastic wires have different tension.SOLUTION: A plastic tortoiseshell net manufacturing device has a net twisting mechanism 2 that twists and weaves a plastic wire a into a tortoiseshell net b, a net twisting prevention mechanism 3 disposed behind the net twisting mechanism, and an untwisting mechanism 4 having a guide gear 41, a front delivering bobbin 42 and a rear delivering bobbin 43 for delivering the wire a, and a guide device 44 installed between the front and rear delivering bobbins. The plastic tortoiseshell net manufacturing device comprises: a heating device 5 that is disposed between the net twisting mechanism 2 on front side and the net twisting prevention mechanism 3 on rear side and evenly heats the wire a inside through a heat conduction insertion pipe 51; a molding holding board 6 that is installed in front of the net twisting mechanism 2 and holds a shape of the tortoiseshell net b; and an AI device 8 that automatically corrects a state of an abnormally twisted portion f2 of each twisted portion f of the wire a delivered from the net twisting mechanism 2 so as to be a normal twisted portion f1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to an apparatus for manufacturing a tortoiseshell net by twisting two plastic wires alternately, and in particular to a plastic tortoiseshell net manufacturing apparatus that uses AI (artificial intelligence) technology to automatically correct abnormal twists that occur when there is an imbalance in the tension of two left and right plastic wires, thereby manufacturing high-quality plastic tortoiseshell nets. [Background technology]

[0002] Tortoiseshell nets are known, made by twisting together metal wires or synthetic resin wires. Tortoiseshell nets are made by twisting two adjacent sides together, and are extremely strong and durable, making them widely used for fences, aquaculture nets, rockfall prevention nets, and other purposes. Of these, tortoiseshell netting, which is made by twisting together synthetic resin wires, is more durable than tortoiseshell wire netting, which uses metal wire, in that it does not rust or corrode, and products have also been developed that are superior in terms of strength and mesh regularity. One such example is a plastic tortoiseshell netting manufacturing device developed by the applicant of this application, patent number 4926126. In this manufacturing device, after two plastic wires are twisted together, the twisted wires are opened to the left and right to form a tortoiseshell net again, and the opened wires are twisted with adjacent separate wires, after which the original two wires are pulled from the left and right towards the center to twist them together again, and this process is repeated alternately to weave the tortoiseshell netting. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4926126 Summary of the Invention [Problem to be solved by the invention]

[0004] After twisting two plastic wires together, they are opened on both sides to form a tortoiseshell shape again. When the twisted part is pulled to the left and right, if there is an imbalance in the tension between the left and right wires, the wire with weaker tension will be pulled to the wire with stronger tension and will end up wrapped around it, causing an abnormal twist. Plastic tortoiseshell nets (see Figure 11) that contain many abnormally twisted sections lose their durability and appearance, reducing their value as a product and leading to their disposal as defective goods. To avoid this, skilled technicians monitor the nets and, upon detecting abnormally twisted sections, immediately correct the tension in the wire that is causing the problem, resulting in high-quality plastic tortoiseshell nets. However, because the difference between normal twisted sections (see Figure 12(A)) and abnormal twisted sections (see Figures 12(B) and (C)) is minute and multiple twisted sections must be checked instantly, the detection of abnormal twisted sections currently relies on skilled technicians. Moreover, even experienced technicians sometimes overlook the occurrence of abnormal twisted portions, which is one of the reasons why it is difficult to eradicate the rate of defective plastic tortoiseshell nets.

[0005] This invention was devised in view of the above-mentioned problems and to solve them. Its purpose is to provide a manufacturing device for plastic hexagonal netting using AI (artificial intelligence) technology that can automatically correct abnormal twisted parts that occur when there is an imbalance in the tension of the left and right plastic wires, thereby enabling the production of high-quality plastic hexagonal netting without relying on skilled technicians. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a mesh twisting mechanism in which a number of pairs of twisting half-gears, each having a through-hole for a plastic wire, are arranged side by side in the mesh width direction, and two plastic wires inserted into the through-holes of a pair of matching twisting half-gears are twisted several times by the rotation of the pair of matching twisting half-gears, and then one or both of the plastic wires are separated and moved in the mesh width direction to mate with another adjacent twisting half-gear, and the newly matched pair of twisting half-gears rotates to twist the two plastic wires inserted into the through-holes of the half-gears several times, and then return to their original positions to mate with the previous twisting half-gear and rotate, repeating this process; and behind the mesh twisting mechanism, twist prevention half-gears are provided which correspond one-to-one to each of the twisting half-gears of the mesh twisting mechanism. Each twist prevention half gear of the twist prevention mechanism has a through hole for the plastic wire, and rotates and moves apart in the mesh width direction in synchronism with the rotation and separation movement in the mesh width direction of the twisting half gear of the twisting mechanism. A guide gear rotates in synchronism with the rotation of each pair of half gears of the twisting mechanism and the twist prevention mechanism. A front supply bobbin, which is provided inside the rotating guide gear, supplies the plastic wire to one of the twisting half gears of the twisting mechanism through one of the twist prevention half gears of the twist prevention mechanism that forms a matching pair. The front supply bobbin is hooked on the outer circumferential groove of the guide gear and rotates to the other twisting half gear of the twisting mechanism through the other of the twist prevention half gears of the twist prevention mechanism that forms a matching pair. Plastic wireand a guide device disposed between the front and rear supply bobbins for transferring the plastic wires supplied from each rear supply bobbin to the corresponding guide gear. An untwisting mechanism is provided behind the mesh twist prevention mechanism, and the through holes of the corresponding half-shaped gears of the front and rear mesh twisting mechanisms and mesh twist prevention mechanisms are connected by hollow heat conduction tubes through which the plastic wires pass. A heating device is provided in the area where the heat conduction tubes are installed between the front and rear mesh twisting mechanisms and mesh twist prevention mechanisms, and the heating device uniformly heats the internal plastic wires through the heat conduction tubes. A guide device is provided between the front and rear mesh twisting mechanisms and mesh twist prevention mechanisms, and the untwisting mechanism is provided behind the mesh twist prevention mechanism. The apparatus is provided with a comb-shaped forming holding plate that has at least a recess at each position corresponding to each twisted portion in the mesh width direction of the tortoiseshell net sent out from the mesh twisting mechanism, moves a little forward at the same speed as the tortoiseshell net is sent out from the mesh twisting mechanism, and then instantaneously returns to its original position, repeating this operation, and an AI device that corrects abnormal twisted portions of each twisted portion of the plastic wire material sent out forward from each through-hole of the mesh twisting mechanism to a normal twisted portion, and the AI ​​device is provided with a plurality of twisted portion photographing devices that photograph each twisted portion of the plastic wire material sent out from each through-hole of the mesh twisting mechanism, and Focusing on the central positional relationship of the bulges in the shape characteristics of the twisted part, we used machine learning to identify the feature that the central positional relationship of the bulges is in a straight line in the normal twisted part and not in the abnormal twisted part. The system is equipped with an image recognition processing unit that determines whether the state of each twisted portion is normal or abnormal, and a tension adjustment unit that adjusts the tension of the tension adjustment wires attached linearly in the length direction at both ends of the plastic tortoise-shell netting.When the AI ​​device detects an abnormal twisted portion of the plastic wire, the tension adjustment unit adjusts the tension of the tension adjustment wires attached linearly in the length direction at both ends of the plastic tortoise-shell netting, thereby automatically correcting the abnormal twisted portion of the plastic wire to a normal twisted portion with no imbalance in the tension of the wires on the left and right. [Effects of the Invention]

[0007] According to the plastic tortoiseshell net manufacturing device using AI technology of this invention, which is equipped with means for solving the above problems, each twisted section created by twisting left and right plastic wires together is monitored by multiple cameras, and abnormal twisted sections that occur when there is an imbalance in the tension of the left and right plastic wires are detected using AI technology.By adjusting the tension of the tension-adjusting wires at both ends of the plastic tortoiseshell net, the abnormal twisted sections can be automatically corrected to normal twisted sections where there is no imbalance in the tension of the left and right wires. This allows high-quality plastic hexagonal netting to be manufactured without relying on skilled technicians. Furthermore, this plastic tortoiseshell net manufacturing device using AI technology can halve the frequency of defective plastic tortoiseshell nets compared to conventional manufacturing devices that rely on the visual inspection of skilled technicians. For example, the rate of defective products used to be around 5-8%, but with the use of AI technology, the rate of defective products has dropped to around 3%. Furthermore, monitoring using AI technology can eliminate the need for constant monitoring by skilled engineers, contributing to the omission of such monitoring. Furthermore, when an abnormality occurs, AI technology can notify skilled engineers of the abnormality, allowing them to deal with the issue. [Brief explanation of the drawings]

[0008] [Figure 1] This is an overall schematic diagram of a plastic tortoiseshell net manufacturing device using AI technology, showing an embodiment for implementing this invention. [Figure 2] FIG. 1 is a partial perspective view of a mesh twisting mechanism and a mesh twist prevention mechanism during rotation, illustrating an embodiment of the present invention. [Figure 3] FIG. 10 is a partial perspective view showing the mesh twisting mechanism and mesh twist prevention mechanism when the half gears are separated and moved in the mesh width direction, illustrating an embodiment of the present invention. [Figure 4] 1 is a partial perspective view of an untwisting mechanism showing an embodiment of the present invention. FIG. [Figure 5] 1 is a partial perspective view of a mold holding plate showing an embodiment of the present invention. [Figure 6] 1(A) to 1(C) are partial cross-sectional plan views illustrating the operation of a forming holding plate showing an embodiment of the present invention. [Figure 7] 1 is a schematic diagram of an AI device showing an embodiment of the present invention. [Figure 8] (A) is a partially enlarged plan view of a straight-type normal twist portion of a hexagonal net detected by an AI device showing an embodiment of the present invention, (B) is a partially enlarged plan view of a V-shaped abnormal twist portion of a hexagonal net detected by an AI device, and (C) is a partially enlarged plan view of an inverted V-shaped abnormal twist portion of a hexagonal net detected by an AI device. [Figure 9] (A) is a partial plan view of a tortoiseshell net with tension-adjusting wires attached to both ends, showing an embodiment of the present invention, and (B) is a partial plan view of the tortoiseshell net with the tension-adjusting wires removed. [Figure 10] FIG. 1 is a partial plan view of a tortoiseshell net made of normal twisted portions. [Figure 11] FIG. 1 is a partial plan view of a tortoiseshell net made of abnormally twisted portions. [Figure 12] (A) is a partially enlarged plan view of the normal twisted part of the hexagonal net, and (B) and (C) are partially enlarged plan views of the abnormal twisted part of the hexagonal net. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, the present invention will be described in more detail based on the embodiments of the invention shown in the drawings. In the figure, the plastic tortoiseshell net manufacturing device 1 comprises a net twisting mechanism 2 that twists plastic wire a together to form a tortoiseshell net b, a net twist prevention mechanism 3 located behind it, and an untwisting mechanism 4 having a guide gear 41, a front supply bobbin 42 that supplies plastic wire a, a rear supply bobbin 43, and a guide device 44 installed between them.In addition to these, it is also equipped with a heating device 5 located between the front and rear net twisting mechanisms 2 and the net twist prevention mechanism 3, which uniformly heats the internal plastic wire a through a heat conduction insertion tube 51, a forming holding plate 6 located in front of the net twisting mechanism 2 to maintain the shape of the tortoiseshell net b, and an AI device 8 that automatically corrects the abnormal twist section f2 of each twisted section f of the plastic wire a sent out from the net twisting mechanism 2 to a normal twist section f1.

[0010] The mesh twisting mechanism 2 weaves plastic wire a into a hexagonal mesh b by repeatedly rotating a pair of twisting half-gears 21, 22 in unison and then separating and moving in the mesh width direction. The hexagonal mesh b is continuously produced forward by the mesh twisting mechanism 2. The mesh twisting mechanism 2 has racks 23 arranged above and below it that rotate the twisting half-gears 21, 22 by meshing with them.

[0011] The mesh twisting mechanism 2 has through holes 21a, 22a for the plastic wires a, and for example, a number of pairs of upper and lower twisting half-gears 21, 22 are arranged side by side in the mesh width direction, and two plastic wires a inserted into the through holes 21a, 22a of the pair of matching twisting half-gears 21, 22 are twisted several times by the rotation of the pair of matching upper and lower twisting half-gears 21, 22, and then one or both of the plastic wires separate and move in the mesh width direction to match other adjacent twisting half-gears 21, 22 at the top and bottom, and the newly matched pair of twisting half-gears 21, 22 twists the two plastic wires a inserted into the through holes 21a, 22a of the half-gears 21, 22 several times by the rotation of the newly matched pair of twisting half-gears 21, 22, and then returns to their original positions and matches and rotates with the previous twisting half-gears 21, 22 at the top and bottom, repeatedly, until a tortoiseshell mesh b is woven.

[0012] In other words, the mesh twisting mechanism 2 has a structure in which, for example, a large number of pairs of twisting half-gears 21, 22 are arranged side by side in the mesh width direction. Each of the twisting half-gears 21, 22, which are matched vertically to form a pair, has a through-hole 21a, 22a formed therein, and a plastic wire a is inserted through each of the through-holes 21a, 22a. The twisting half-gears 21, 22, which are paired vertically, are configured to rotate several times after being matched vertically. One or both of the upper twisting half-gear 21 and the lower twisting half-gear 22 are configured to separate and move in the mesh width direction to match the adjacent twisting half-gears 21, 22 above and below.

[0013] Behind the mesh twisting mechanism 2, there is arranged a mesh twist prevention mechanism 3 having twist prevention half gears 31, 32 that correspond one-to-one to the twisting half gears 21, 22 of the mesh twisting mechanism 2. The mesh twist prevention mechanism 3 is provided to prevent the tortoiseshell mesh b from being unable to be woven due to the heat conduction insertion pipe 51 installed between the mesh twisting mechanism 2 in front.

[0014] Each of the twist prevention half gears 31, 32 of the mesh twist prevention mechanism 3 has a through hole 31a, 32a for inserting the plastic wire a. Furthermore, each of the twist prevention half gears 31, 32 of the mesh twist prevention mechanism 3 is structured to rotate and move apart in the mesh width direction in synchronization with the rotation and movement apart in the mesh width direction of the twisting half gears 21, 22 of the mesh twisting mechanism 2. The mesh twist prevention mechanism 3 has racks 33 arranged above and below that rotate the twist prevention half gears 31, 32 by meshing with them.

[0015] The mesh twist prevention mechanism 3 has approximately the same structure as the mesh twisting mechanism 2, and moves in the same way as the mesh twisting mechanism 2, thereby preventing the heat transfer insertion pipes 51 installed between each of the twisting half-gears 21, 22 of the mesh twisting mechanism 2 and each of the twist prevention half-gears 31, 32 of the mesh twist prevention mechanism 3 that correspond one-to-one to each other from coming into contact or twisting with each other due to the rotation of the twisting half-gears 21, 22 and the movement of separation and migration in the mesh width direction.

[0016] In other words, if the heat transfer tubes 51 come into contact with each other or become twisted together, it will hinder the rotation of the twisting half gears 21, 22 of the mesh twisting mechanism 2 and the separation movement in the mesh width direction, causing malfunctions, and also the heat transfer tubes 51 will break or bend, causing the inserted plastic wires a to break or twist together, preventing the hexagonal mesh b from being woven. To prevent this, the mesh twist prevention mechanism 3 is located behind the mesh twisting mechanism 2.

[0017] The untwisting mechanism 4 untwists the plastic wire a continuously fed towards the mesh twisting prevention mechanism 3, which is twisted by the mesh twisting mechanism 2 and thus imparts a twisting tendency to the plastic wire a. By untwisting the plastic wire a continuously fed towards the mesh twisting prevention mechanism 3, the untwisting mechanism 4 prevents the plastic wire a twisted by the mesh twisting mechanism 2 from becoming twisted, thereby preventing the shape of the tortoiseshell mesh b from being formed smoothly and also preventing a decrease in its strength.

[0018] In addition, the untwisting mechanism 4 prevents the plastic wire rods a continuously fed toward the mesh twist prevention mechanism 3 from becoming entangled with each other due to the rotation of each of the twist prevention half-split gears 31, 32 of the mesh twist prevention mechanism 3 and the movement of separation and movement in the mesh width direction, thereby enabling the plastic wire rods a to be fed smoothly toward the mesh twist prevention mechanism 3.

[0019] The untwisting mechanism 4 is composed of a guide gear 41, a front supply bobbin 42 for supplying plastic wire a, a rear supply bobbin 43 for supplying plastic wire a, a guide device 44, etc., and is arranged rearward behind the mesh twist prevention mechanism 3, with the front supply bobbin 42, guide device 44, and rear supply bobbin 43 within the guide gear 41 facing rearward.

[0020] The guide gears 41 rotate in synchronization with the rotation of each pair of half-gears of the mesh twisting mechanism 2 and the mesh twist prevention mechanism 3. The number of guide gears provided corresponds to the number of front supply bobbins 42. They are also provided behind the mesh twist prevention mechanism 3. Gears are formed on the outer periphery of the guide gears 41, and rotating gears 41a are provided in mesh with these gears to rotate the guide gears 41. An outer peripheral groove 41b is formed on part of the outer periphery of the guide gear 41 to hook and rotate the plastic wire a supplied from the rear supply bobbin 43.

[0021] The front supply bobbin 42 supplies the plastic wire a to one of the twisting half gears 21 or 22 of the mesh twisting mechanism 2 through one of the twist prevention half gears 31 or 32 of the mesh twist prevention mechanism 3 that is a matching pair. The plastic wire a is wound around the front supply bobbin 42. The front supply bobbin 42 is provided on the rotating inner side of the guide gear 41. The front supply bobbin 42 is provided so as to be substantially unrotatable relative to the rotating guide gear 41.

[0022] The rear supply bobbin 43 supplies the plastic wire a, which is hooked and rotated in the outer peripheral groove 41b of the guide gear 41, to the other twisting half gear 21 or 22 of the mesh twisting mechanism 2 through the other of the twist prevention half gears 31 or 32 of the mesh twist prevention mechanism 3 that forms a matching pair. The rear supply bobbin 43 is wound with the plastic wire a. It is located behind the guide gear 41 and the guide device 44.

[0023] The guide device 44 is provided between the front supply bobbin 42 and the rear supply bobbin 43, and is a device for transferring the plastic wire a supplied from each rear supply bobbin 43 to the corresponding guide gear 41. The guide device 44 is provided with a locking piece 44a that hooks the plastic wire a, and this locking piece 44a moves up and down and left and right in conjunction with the rotation of each of the half gears 21, 22 and 31, 32 of the mesh twisting mechanism 2 and the mesh twist prevention mechanism 3 and the movement of separation and movement in the mesh width direction, thereby smoothing the supply of the plastic wire a from the rear supply bobbin 43.

[0024] The through holes of the corresponding half-type gears 21 and 31, and 22 and 32 of the front and rear mesh twisting mechanisms 2 and mesh twist prevention mechanisms 3 are connected by hollow heat conduction insertion pipes 51 through which the plastic wire a passes. The heat conduction insertion pipes 51 are arranged in parallel between the front and rear mesh twisting mechanisms 2 and mesh twist prevention mechanisms 3, and the number of heat conduction insertion pipes 51 is the same as the number of half-type gears.

[0025] That is, one end of a certain heat transfer tube 51 is connected to the through hole 21a of the twisting half gear 21 of the mesh twisting mechanism 2, and the other end of the heat transfer tube 51 is connected to the through hole 31a of the twist prevention half gear 31 of the mesh twist prevention mechanism 3, which rotates in synchronization with the twisting half gear 21 and moves apart in the mesh width direction in response to the twisting half gear 21. Similarly, one end of another heat transfer tube 51 is connected to the through hole 22a of the twisting half gear 22 of the mesh twisting mechanism 2, and the other end of the heat transfer tube 51 is connected to the through hole 32a of the twist prevention half gear 32 of the mesh twist prevention mechanism 3, which rotates in synchronization with the twisting half gear 22 and moves apart in the mesh width direction in response to the twisting half gear 22.

[0026] Each heat transfer tube 51 is hollow, and one plastic wire a is inserted into the hollow interior. By using this heat transfer tube 51, the plastic wire a can be easily inserted from each of the twist prevention half gears 31, 32 of the mesh twist prevention mechanism 3 to the corresponding twisting half gears 21, 22 of the mesh twisting mechanism 2 without any mistakes.

[0027] Each heat conduction tube 51 is made of a thermally conductive cylindrical tube, for example, made of metal. When each heat conduction tube 51 is heated by the heating device 5, the heat is transferred to the entire heat conduction tube 51, which has thermal conductivity. As each inserted plastic wire rod a moves inside the tube toward the mesh twisting mechanism 2, it is uniformly heated and softened by the heat conduction tube 51, to which heat is transferred to the entire tube. The softened plastic wire rods a are smoothly twisted without generating twisting resistance during twisting and are woven into the tortoiseshell mesh b.

[0028] As described above, the heating device 5 is a device that uniformly heats the plastic wire a that passes through it via the heat conduction pipes 51, and is provided in an area where a large number of heat conduction pipes 51 are arranged side by side between the front and rear mesh twisting mechanisms 2 and mesh twist prevention mechanisms 3. The heating device 5 is disposed transversely to the large number of heat conduction pipes 51 that are arranged side by side. For example, an electric heater is used for the heating device 5. The space between the mesh twisting mechanisms 2 and mesh twist prevention mechanisms 3, where the heating device 5 and each heat conduction pipe 51 are arranged, is, for example, a sealed space to prevent heat from leaking to the outside.

[0029] In front of the net twisting mechanism 2, two forming and holding plates 6 are provided, for example, one at the front and one at the back, to hold the shape of the tortoiseshell net b that has been woven into the tortoiseshell net b by the net twisting mechanism 2 and delivered. The two forming and holding plates 6 are integrally connected by a connecting plate 62 and perform identical operations. Each forming and holding plate 6 has at least a recess 61 at a location corresponding to each twisted portion f in the net width direction of the tortoiseshell net b delivered from the net twisting mechanism 2, and is structured so that it moves forward a short distance at the same speed as the delivery speed of the tortoiseshell net b from the net twisting mechanism 2 and then instantly returns to its original position, repeating this operation. In addition, both forming and holding plates 6 connected by the connecting plate 62 are structured so that they are driven in conjunction with the net twisting mechanism 2 by a drive mechanism (not shown).

[0030] Each recess 61 is rounded, for example, so as not to damage the twisted portions f when pressed from above, and is formed at equal intervals on the underside of the horizontally long forming and holding plate 6, which is formed in a comb-tooth shape when viewed from the front. Each twisted portion f in the mesh width direction of the hexagonal net b fed from the mesh twisting mechanism 2 engages with the multiple recesses 61 formed on the underside of the horizontally long forming and holding plate 6. In this case, the twisted portions f of the hexagonal net b engage with every other recess 61 on the forming and holding plate 6. In other words, the recesses 61 alternate between portions where the twisted portions f of the hexagonal net b engage and empty portions where they do not engage.

[0031] Furthermore, the recesses 61 formed on the undersides of the two forming holding plates 6 arranged at the front and rear are formed in the same positions on the front and rear. And, on the two front and rear forming holding plates 6, the locations of the twisted portions f on both sides of the hexagon of the tortoiseshell net b are at the center of the hexagon on the front and rear, so the locations with which the twisted portions f of the tortoiseshell net b engage in the front and rear recesses 61 are different. In other words, when the twisted portions f of the tortoiseshell net b engage in the recess 61 on the front forming holding plate 6, the recess 61 on the rear forming holding plate 6, which is in the same position as that location, is empty.

[0032] Of these, the rear forming holding plate 6, located closest to the net twisting mechanism 2, presses down from above with every other recess 61 the twisted portions f that form both the left and right sides of the hexagon of the hexagonal tortoiseshell net b immediately after it has been fed out of the net twisting mechanism 2, and engages them. Then, in the engaged state, it moves forward at the same speed as the feed speed of the hexagonal tortoiseshell net b by the total distance equal to the length of the twisted portions f that form both the left and right sides of the hexagon of the hexagonal tortoiseshell net b and the length of the sine (the side opposite the hypotenuse of sine) from the end of the twisted portion f to the start of the twisted portion f of the next hexagonal tortoiseshell net b, after which the forming holding plate 6 instantly returns to its original position and repeats this operation.

[0033] The two plastic wires a that make up the twisted portion f, which forms the left and right sides of the hexagon of the tortoiseshell net b, are sent out from the twisting half gears 21, 22 of the net twisting mechanism 2. As the upper and lower twisting half gears 21, 22 separate and move left and right, the two plastic wires a separate left and right from the end of the twisted portion f, and then rotate while meeting the adjacent twisting half gears 21, 22 at the top and bottom, thereby twisting the two plastic wires a together. In this way, the tortoiseshell net b is woven.

[0034] At this time, when the two plastic wires a are separated into left and right at the end of the twisted section f, even if they are pulled strongly to the left or right, the end sides of each twisted section f are engaged with the recesses 61 formed on the underside of the forming holding plate 6, so they are held in the central position without being pulled in either direction, and the tortoiseshell hexagonal shape is maintained.

[0035] In particular, since the plastic wire a is softened by heating immediately after being twisted together, if the softening state of the left and right plastic wires a is slightly different, it is conceivable that they will be pulled in either the left or right direction, causing the tortoiseshell shape to collapse. However, due to the action of this forming holding plate 6, the end side of each twisted portion f is engaged and held in the recess 61, so they are not pulled in either the left or right direction, and the tortoiseshell shape can be maintained.

[0036] Another forming holding plate 6 located at the front presses down from above on the twisted portions f located at the center of both sides of the hexagon of the tortoiseshell net b that the rear forming holding plate 6 presses down and engages, but because it is integrally connected to the rear forming holding plate 6 by a connecting plate 62, it operates in exactly the same way. Immediately after being woven into a tortoiseshell shape, the tortoiseshell net b has softened due to the heating just before, and there is a possibility that its shape will be deformed, but the front and rear forming holding plates 6 prevent the tortoiseshell shape from deforming and maintain the shape.

[0037] A cylindrical delivery roller 7 is installed immediately behind the forming holding plate 6, which delivers the hexagonal net b forward immediately after it has been woven. Pins 71 protrude from the circumferential side of this delivery roller 7 at regular intervals in the width and circumferential directions, and as the pins 71 rotate forward, they catch on the vertices of the hexagonal hexagons of the hexagonal net b, causing the hexagonal net b to move forward and be wound up by a winding device (not shown) installed in front.

[0038] The AI ​​device 8 is a device that uses AI (artificial intelligence) technology to automatically correct the state of abnormal twisted portions f2 of each twisted portion f of the plastic wire a that is sent forward from each through hole 21a, 22a of the mesh twisting mechanism 2 to normal twisted portions f1, thereby producing a high-quality plastic tortoiseshell mesh b.

[0039] The AI ​​device 8 is equipped with a plurality of twisted section photographing devices 81 that photograph each twisted section f of the plastic wire a sent out from each through hole 21a, 22a of the mesh twisting mechanism 2, an image recognition processing unit 82 that determines whether the state of each twisted section f is normal or abnormal based on the image data of each twisted section f of the plastic wire a photographed by the twisted section photographing devices 81, and a tension adjustment unit 83 that adjusts the tension of tension adjustment wires 83a attached linearly in the length direction to both ends of the plastic tortoiseshell mesh b.

[0040] When the image recognition processing unit 82 of the AI ​​device 8 determines that the twisted portion f of the plastic wire a is in an abnormal twisted portion f2 state, the AI ​​device 8 adjusts the tension of the tension adjusting wires 83a attached linearly in the length direction at both the left and right ends of the plastic tortoiseshell netting b via the left and right tension adjusting units 83, automatically correcting the abnormal twisted portion f2 to a normal twisted portion f1 where there is no imbalance in the tension of the left and right wires a.

[0041] The twisted portion photographing device 81, which constitutes part of the AI ​​device 8, is a device, for example a camera, that photographs each twisted portion f of the plastic wire a sent out from each of the through holes 21a, 22a of the mesh twisting mechanism 2. A plurality of twisted portion photographing devices 81 are installed at intervals in the width direction of the plastic tortoiseshell net b sent out forward from the mesh twisting mechanism 2, and are devices that photograph all twisted portions f formed in the width direction of the plastic tortoiseshell net b.

[0042] For this reason, the multiple twisted portion camera devices 81 are attached at appropriate intervals in the width direction of the net twisting mechanism 2 so that they can photograph all of the twisted portions f of the plastic tortoiseshell net b sent out forward from the net twisting mechanism 2. Each twisted portion camera device 81 is attached at a diagonally upward position in front of the net twisting mechanism 2, facing diagonally downward toward each of the twisted portions f of the plastic tortoiseshell net b sent out forward. Each twisted portion camera device 81 can simultaneously photograph multiple adjacent twisted portions f, so that all of the twisted portions f can be photographed without omission.

[0043] The image recognition processing unit 82, which constitutes part of the AI ​​device 8, is incorporated into a personal computer or the like and judges whether the state of each twisted portion f of the plastic wire a is normal or abnormal based on the image data of each twisted portion f photographed by the twisted portion photographing device 81. This image recognition processing unit 82 uses its own image processing to remove noise and extract the characteristics of the twisted portion f of the plastic tortoiseshell net b.

[0044] That is, the image recognition processing unit 82 focuses on three bulges w, which are a shape feature of the twisted portion f of the plastic tortoiseshell netting b. Specifically, the system extracts the positional relationship of the three bulges w present in the bulge w as a feature quantity and performs abnormality detection.

[0045] The twisted part f of the plastic tortoiseshell net b is created by twisting two plastic wires a three times, so there are three bulges w in one twisted part f (see Figure 8 (A) (B) (C)). The central positional relationship of these bulges w is extracted as a feature.

[0046] This is because in the case of a normal twisted portion f1, the relative positions of the centers of the three bulges w are in a straight line (see Figure 8(A)). However, in the case of an abnormal twisted portion f2, the relative positions of the centers of the three bulges w are not in a straight line. It is also known that abnormal twisted portions f2 can be classified into two patterns: a dogleg-shaped abnormal twisted portion f2-1 (see Figure 8(B)) and an inverted dogleg-shaped abnormal twisted portion f2-2 (see Figure 8(C)). These characteristics are learned through machine learning, allowing for automated anomaly detection.

[0047] The tension adjusting units 83 are located on both sides of the device and adjust the tension of the tension adjusting wires 83a attached linearly along the length of the plastic tortoiseshell netting b at both ends. The left and right tension adjusting units 83 adjust the tension of the left and right tension adjusting wires 83a, respectively, to automatically correct the abnormal twisted portion f2 of the twisted portion f of the plastic wire a to a normal twisted portion f1 where there is no imbalance in the tension of the left and right wires a.

[0048] Each tension adjusting section 83 is provided with a winding drum 83b, and one end of a tension adjusting wire 83a is wound around each winding drum 83b. When the tension adjusting wire 83a is unwound forward from the winding drum 83b during the production of the plastic tortoiseshell net b, the winding drum 83b is braked as needed to adjust its rotational force, thereby adjusting the tension of each tension adjusting wire 83a.

[0049] The tension adjusting wires 83a attached linearly along the length of the plastic tortoiseshell net b at both ends are inferior in strength and durability to the plastic wires a that make up the plastic tortoiseshell net b, and have a small cross section, and are made of, for example, nylon. After the plastic tortoiseshell net b is manufactured, the tension adjusting wires 83a are cut and removed.

[0050] Next, the operation based on the configuration of the above-described embodiment of the invention will be described below. The plastic wire a fed from each front feed bobbin 42 of the untwisting mechanism 4 arranged at the rear is inserted into each through-hole 31a of the twist prevention half gear 31 of the mesh twist prevention mechanism 3 arranged at the front thereof, and then passed through the inside of the heat conduction insertion tube 51, with its tip end coming out from the through-hole 21a of the twisting half gear 21 of the mesh twisting mechanism 2 arranged at the front thereof.

[0051] Similarly, the plastic wire a supplied from each rear supply bobbin 43 of the untwisting mechanism 4 arranged at the rear is passed through each corresponding guide device 44 at the front, hooked onto the outer groove 41b of the guide gear 41 arranged on the outer periphery of each corresponding front supply bobbin 42 in front of the guide device 44, and inserted into each through hole 32a of, for example, the twist prevention half gear 32 of the mesh twist prevention mechanism 3 in front of the guide gear 41, passed through the inside of the heat conduction insertion tube 51, and its tip side is brought out from the through hole 22a of the twisting half gear 22 of the mesh twisting mechanism 2 arranged in front of it.

[0052] After the plastic wires a are set in the manufacturing device 1 for the plastic tortoiseshell net b in the above manner, the electric heater of the heating device 5 is turned on to heat each heat conduction insertion tube 51 through which the plastic wires a are inserted. When the heat conduction insertion tube 51 is heated, the heat is transferred to the entire heat conduction insertion tube 51, and the plastic wires a inside are uniformly heated and softened. After the plastic wires a are softened in this way to reduce the twisting resistance, the net twisting mechanism 2 and the guide gears 41 and guide devices 44 of the net twist prevention mechanism 3 and untwisting mechanism 4, which are linked to it, are operated.

[0053] In operation, the mesh twisting mechanism 2 twists two plastic wires a inserted through the through holes 21 a, 22 a of a pair of matching twisting half-gears 21, 22 several times by rotating the pair of matching twisting half-gears 21, 22, and then one or both of the wires separate and move in the mesh width direction to mate with another adjacent twisting half-gear 21, 22, whereupon the newly matched pair of twisting half-gears 21, 22 twists the two plastic wires a inserted through the through holes 21 a, 22 a of the half-gears several times by rotating the newly matched pair of twisting half-gears 21, 22, and then returns to their original positions to mate with the previous twisting half-gears 21, 22 and rotate, repeating this process. In this way, a hexagonal mesh b is woven and sequentially fed out in front of the mesh twisting mechanism 2.

[0054] The heat conduction insertion tube 51 behind the mesh twisting mechanism 2 and the twist prevention half-gears 31, 32 of the mesh twist prevention mechanism 3 rotate and move apart in the mesh width direction in synchronization with the rotation and separation movement in the mesh width direction of the corresponding twisting half-gears 21, 22 of the mesh twisting mechanism 2.

[0055] Similarly, the untwisting mechanism 4 behind the mesh twist prevention mechanism 3 untwists the plastic wire rods a continuously fed from the front supply bobbin 42 and the rear supply bobbin 43 toward the mesh twist prevention mechanism 3 in synchronization with the rotation of the twisting half gears 21, 22 of the mesh twisting mechanism 2 and the movement of separation in the mesh width direction, thereby preventing the plastic wire rods a from developing a twist tendency when twisted by the mesh twisting mechanism 2. In addition, the plastic wire rods a continuously fed toward the mesh twist prevention mechanism 3 are prevented from becoming entangled with each other by the rotation of the twist prevention half gears 31, 32 of the mesh twist prevention mechanism 3 and the movement of separation in the mesh width direction.

[0056] When the terminal ends of the twisted portions f of the plastic wires a are fed out through the through holes 21a, 22a of the twisting half gears 21, 22 of the mesh twisting mechanism 2, the rear forming holding plate 6 descends from above and presses and engages the terminal ends of the twisted portions f into the recesses 61 formed on its underside (see Figure 6(A)). As a result, the terminal ends of each twisted portion f of the two plastic wires a, which are in a softened state immediately after being fed out of the mesh twisting mechanism 2, are engaged and held by the recesses 61 of the rear forming holding plate 6. Immediately afterwards, the two plastic wires a are pulled left and right and separated, but because the terminal ends of each twisted portion f are held in the recesses 61 of the forming holding plate 6, they do not shift left and right and can maintain their tortoiseshell shape.

[0057] When the recess 61 of the rear forming holding plate 6 nearest to the mesh twisting mechanism 2 presses and engages the terminal end of each twisted portion f of the two plastic wires a, the recess 61 of the front forming holding plate 6 simultaneously descends from above to press and engage the terminal end of each twisted portion f that has already been sent out before this.

[0058] After each recess 61 of the front and rear forming holding plates 6 presses and engages with the end of each twisted portion f of the respective plastic wire a, they move forward at the same speed as the tortoiseshell net b is fed out from the net twisting mechanism 2 by the total distance of the length of the twisted portion f, which forms both the left and right sides of the hexagon of the tortoiseshell net b, and the length of the sine (the side opposite the hypotenuse of sine) from the end of twisted portion f to the start of twisted portion f of the next tortoiseshell net b (see Figures 6(B)(C)), then they instantly move upward and return to their original position at the rear, and at the same time they come down from above again to press and engage with the end of each twisted portion f of the plastic wire a that has just been fed out from the net twisting mechanism 2 (see Figure 6(A)). The front and rear forming holding plates 6 repeat this operation.

[0059] Immediately after being woven into a tortoiseshell shape, the tortoiseshell net b is softened by the heating just beforehand and there is a possibility that the shape may be deformed, but due to the above-mentioned action of the front and rear forming holding plates 6, each twisted part f is held and does not shift in the left and right direction, preventing the tortoiseshell shape from deforming and maintaining its shape.

[0060] After twisting two plastic wires a together, the two twisted wires a are opened on both sides to form a tortoiseshell shape again. When the twisted part f is pulled to the left and right, if there is an imbalance in the tension between the left and right wires a, the wire a with weaker tension will be pulled to the wire a with stronger tension and will become wrapped around it, causing an abnormal twisted part f2.

[0061] In order to detect this abnormal twisted portion f2, all of the twisted portions f of the plastic wire a sent out from each of the through holes 21a, 22a of the mesh twisting mechanism 2 are photographed by a plurality of twisted portion photographing devices 81 constituting the AI ​​device 8. Image data of each twisted portion f of the plastic wire a photographed by the twisted portion photographing devices 81 is sent to an image recognition processing unit 82 constituting the AI ​​device 8. The image recognition processing unit 82 determines whether the state of each twisted portion f is normal or abnormal based on the image data of each twisted portion f.

[0062] The image recognition processing unit 82 examines the positional relationship of three bulges w, which are geometric characteristics of the twisted portion f of the plastic tortoiseshell netting b. In the case of a normal twisted portion f1, the relative positions of the centers of the three bulges w are in a straight line. In contrast, in the case of an abnormal twisted portion f2, the relative positions of the centers of the three bulges w are not in a straight line. Furthermore, the abnormal twisted portion f2 is classified into two patterns: a dogleg-shaped abnormal twisted portion f2-1 and an inverted dogleg-shaped abnormal twisted portion f2-2. These characteristics are used to examine the twisted portion f of the plastic tortoiseshell netting b.

[0063] When the AI ​​device 8 detects an abnormal twisted portion f2, the left and right tension adjusting units 83 adjust the tension of the tension adjusting wires 83a attached linearly in the length direction at both ends of the plastic tortoiseshell netting b, automatically correcting the abnormal twisted portion f2 of the twisted portion f of the plastic wire a to a normal twisted portion f1 with no imbalance in the tension of the left and right wires a.

[0064] Furthermore, when an abnormal twisted portion f2 is detected, the AI ​​device 8 notifies nearby skilled technicians by using an alarm or by contacting the skilled technician in charge, thereby enabling a system for rapid backup by skilled technicians.

[0065] The tortoiseshell net b is woven by the net twisting mechanism 2 and automatically corrected by the AI ​​device 8 to a normal twisted section f1 with no imbalance in the tension of the plastic wires a on the left and right sides. The pin 71, which rotates toward the front of the delivery roller 7 installed just behind the forming holding plate 6, catches and pulls the vertices of the hexagons of the tortoiseshell net b, which then moves forward and is taken up by a winding device (not shown) installed in front.

[0066] In addition, the tension-adjusted wires 83a at both ends, in which the abnormal twisted portion f2 of the twisted portion f of the plastic wire a has been corrected to a normal twisted portion f1 in which there is no imbalance in the tension of the left and right plastic wires a, are then cut and removed.

[0067] It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0068] 1. Plastic turtle shell net manufacturing equipment 2 Net twisting mechanism 21 Half-split gear for twisting 21a through hole 22 Half-split gear for twisting 22a through hole 23 racks 3 Net twist prevention mechanism 31 Half gear for preventing twisting 31a through hole 32 Half gear for preventing twisting 32a through hole 33 racks 4 Untwisting mechanism 41 Guide gear 41a Rotating gear 41b Peripheral gutter 42 Front supply bobbin 43 Rear supply bobbin 44 Guide device 44a Locking piece 5 Heating device 51 Heat conduction tube 6 Forming holding plate 61 Recess 62 Connecting plate 7 Delivery roller 71 pins 8 AI device 81 Twisting section camera 82 Image recognition processing section 83 Tension adjustment section 83a Tension adjustment wire 83b Winding drum a Plastic wire b. Plastic turtle-shell net f Twisting section f1 normal twist section f2 Abnormal twist f2-1 L-shaped abnormal twist f2-2 Reverse L-shaped abnormal twist w bulge

Claims

[Claim 1] The mesh twisting mechanism includes a number of pairs of twisting half-gears, each having a through-hole for a plastic wire, arranged in parallel in the mesh width direction, and two plastic wires inserted into the through-holes of a pair of matching twisting half-gears are twisted several times by the rotation of the matching pair of twisting half-gears, and then one or both of the plastic wires are separated and moved in the mesh width direction to mate with another adjacent twisting half-gear, and the newly matched pair of twisting half-gears rotates to twist the two plastic wires inserted into the through-holes of the half-gears several times, and then returns to its original position to mate with the previous twisting half-gear and rotate, repeating this process. a mesh twist prevention mechanism is disposed behind the mesh twisting mechanism, the mesh twist prevention mechanism having twist prevention half gears each corresponding to one of the twisting half gears of the mesh twisting mechanism, each of the twist prevention half gears having a through hole for the plastic wire, and rotating and moving apart in the mesh width direction in synchronization with the rotation and moving apart in the mesh width direction of the twisting half gears of the mesh twisting mechanism; a front supply bobbin provided on the inside of the rotating guide gear for supplying plastic wire to one of the twisting half-gears of the twisting mechanism through one of the twisting prevention half-gears of the twisting prevention mechanism that matches with the twisting prevention half-gear of the twisting prevention mechanism; a rear supply bobbin provided behind the guide gear for supplying plastic wire that is hooked in the outer peripheral groove of the guide gear and rotates to the other twisting half-gear of the twisting mechanism through the other of the twisting prevention half-gears of the twisting prevention mechanism that matches with the twisting prevention half-gear of the twisting prevention mechanism; and a guide device provided between the front supply bobbin and the rear supply bobbin for transferring the plastic wire supplied from each rear supply bobbin to the corresponding guide gear. The through holes of the corresponding half-shaped gears of the front and rear mesh twisting mechanisms and mesh twist prevention mechanisms are connected to each other by hollow heat conduction insertion tubes through which plastic wires are inserted, and a heating device is provided in the area where the heat conduction insertion tubes are installed between the front and rear mesh twisting mechanisms and mesh twist prevention mechanisms, which uniformly heats the internal plastic wires through the heat conduction insertion tubes; A comb-shaped forming and holding plate is provided in front of the net twisting mechanism, the forming and holding plate having at least recesses at positions corresponding to the respective twisted portions in the net width direction of the hexagonal net delivered from the net twisting mechanism, and moving slightly forward at the same speed as the delivery speed of the hexagonal net from the net twisting mechanism and then instantly returning to its original position, repeating this operation; An AI device is provided to correct abnormal twisted portions of each twisted portion of the plastic wire material fed forward from each through-hole of the mesh twisting mechanism to a normal twisted portion, The AI ​​device comprises a plurality of twisted section photographing devices for photographing each twisted section of the plastic wire material sent out from each through-hole of the net twisting mechanism, an image recognition processing unit that focuses on the central positional relationship of the bulges, which are shape characteristics of the twisted section, based on image data of each twisted section of the plastic wire material photographed by the twisted section photographing devices, and determines whether the state of each twisted section is normal or abnormal by machine learning the characteristic that the central positional relationship of the bulges is linear in a normal twisted section and not linear in an abnormal twisted section, and a tension adjustment unit that adjusts the tension of tension adjustment wires attached linearly in the length direction to both ends of the plastic tortoiseshell net, When the AI ​​device detects an abnormal twisted portion of the plastic wire, it automatically corrects the abnormal twisted portion of the plastic wire to a normal twisted portion with no imbalance in the tension of the wire on the left and right sides by adjusting the tension of the tension adjusting wire attached linearly in the length direction at both ends of the plastic hexagonal net through the tension adjusting unit. A plastic tortoiseshell net manufacturing device that uses AI technology.

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