A device integrating the functions of mesh stacking and pressing.

Abstract

This invention discloses a device integrating net stacking and pressing functions, including a frame base and a net stacking frame disposed on one side of the frame base. A net swaying mechanism is provided between the frame base and the net stacking frame. The net stacking frame is equipped with a net swaying mechanism, a hydraulic mechanism, and a packing component. Unlike existing technologies, this device reduces the amount of manual labor required when stacking and packing net sheets. The mechanical net stacking method reduces the labor intensity of workers. The hydraulic mechanism can compress and pack the net sheets, greatly reducing the volume occupied by the net sheets, thereby saving space in warehouse storage and transportation. The servo motor and lead screw work together to make the device respond faster and more smoothly, greatly reducing the vibration effect of the device and improving the efficiency of net stacking and pressing. The rollers and clamps allow the rope used for binding to slide stably from one side to the other, making it convenient for workers to bind the net sheets.

Description

Technical Field

[0001] This invention relates to the technical field of polyethylene monofilament knotless web stacking and pressing devices, specifically a device that integrates web stacking and pressing functions. Background Technology

[0002] With the development of the aquaculture and fishing industries, the market demand for warp-knitted knotless netting is increasing. Many netting companies produce a large number of polyethylene monofilament knotless nets every year. However, since polyethylene monofilament knotless nets usually have a large yarn count and density, traditional manual stacking and packing of nets is not only labor-intensive but also inefficient, making it difficult to adapt to large-scale socialized production. Therefore, it is necessary to design a mechanical packing auxiliary device.

[0003] However, in practical use, we found that currently, the only publicly available simple netting device, such as... Figure 1 As shown, the device uses an asynchronous motor to drive the swing arm to move 360 ​​degrees, which in turn drives the crank-slider mechanism to move back and forth to set up the net. This can reduce the labor intensity of manual net setting to a certain extent. However, this crank-slider mechanism has problems such as slow running speed and easy wear. In actual operation, the movement amplitude is large, which causes a large resonance effect of the whole machine, which affects the use effect of the equipment to a certain extent and results in low net setting efficiency. Therefore, we propose a device that integrates the functions of stacking nets and pressing. Summary of the Invention

[0004] The purpose of this invention is to provide a device that integrates the functions of stacking mesh and pressing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device integrating the functions of stacking and pressing netting, comprising a frame base and a stacking netting frame disposed on one side of the frame base, a netting mechanism disposed between the frame base and the stacking netting frame, and a netting frame disposed on the stacking netting frame, so as to drive the netting frame to reciprocate and shift, thereby realizing the stacking of netting sheets; a hydraulic mechanism is also provided, which is disposed on the stacking netting frame, and is used in conjunction with the netting mechanism to compact the stacked netting sheets during the stacking process; a packing component is also provided to pack the compacted netting sheets, which, unlike the prior art, allows workers to reduce the number of manual laborers when stacking and packing netting sheets through the netting mechanism. At the same time, the mechanical netting method reduces the labor intensity of workers, and with the cooperation of the hydraulic mechanism, the netting sheets can be compressed and packed, greatly reducing the volume occupied by the netting sheets, thereby saving space in warehouse storage and transportation processes.

[0006] Preferably, the net stacking mechanism includes a support frame disposed on the stacking frame, a cylindrical linear guide rail is disposed between the support frame and the frame base, two cylindrical linear guide rails are disposed, a sliding frame is slidably disposed between the two cylindrical linear guide rails, and a positioning seat is disposed between the two cylindrical linear guide rails;

[0007] A lead screw is rotatably mounted on the positioning seat, a servo motor is mounted on the frame seat, the end of the lead screw is connected to the output end of the servo motor, the sliding frame is threaded onto the lead screw, and folding plates are provided on both sides of the sliding frame, with the swing net frame positioned between the two folding plates;

[0008] It also includes adjustable components to prevent excessive feeding of the wire mesh and subsequent accumulation of the mesh when the hydraulic mechanism presses down on the mesh disc.

[0009] Preferably, the adjusting component includes an inlet frame mounted on a support frame, a rotating disk rotatably mounted on the support frame so that the net sheet can be introduced into the swing net frame from the inlet frame via the rotating disk, a U-shaped frame mounted on the support frame, a fixed frame mounted on the U-shaped frame, an adjusting plate slidably mounted on the fixed frame, and a positioning clamp plate at the bottom of the adjusting plate.

[0010] The adjusting plate has circular grooves, and multiple sets of circular grooves are provided. The fixing frame has the same structure as the circular grooves. Insert rods are inserted into the circular grooves. By adjusting the insert rods to insert them into different circular grooves, the positioning clamps can be moved and adjusted to ensure that mesh sheets of different sizes can be used normally.

[0011] Preferably, the hydraulic mechanism includes a hydraulic oil tank and a hydraulic oil pump disposed at the bottom of the frame base, and the stacked mesh frame is provided with an upper pressing part and a lower pressing part, so as to realize the compaction of the mesh by the opposite movement of the upper pressing part and the lower pressing part;

[0012] The stacked mesh frame is equipped with movable doors on both sides. When the upper and lower pressing parts are working, the movable doors on both sides are closed to prevent the mesh from being squeezed out.

[0013] Preferably, the upper pressing part includes an upper hydraulic cylinder mounted on the stacked mesh frame. A thick iron plate is mounted at the bottom of the upper hydraulic cylinder, and a guide column is mounted on the thick iron plate. The guide column penetrates the top of the stacked mesh frame to ensure that the thick iron plate can be raised and lowered stably.

[0014] The sliding frame has a U-shaped structure to avoid interference during the mesh stacking process.

[0015] Preferably, the pressing part includes two hydraulic lifting platforms respectively mounted on the stacked mesh frame. Cross plates are rotatably mounted on both sides of the interior of the two hydraulic lifting platforms. The two cross plates are connected in the middle by a rotating shaft, and a main shaft is rotatably mounted between the two cross plates.

[0016] A lower hydraulic cylinder is rotatably installed between any of the lower main shafts and the middle main shaft, and straight slots are opened on both sides of the upper hydraulic lifting platform to allow the upper main shaft to be moved and adjusted, thereby ensuring the stable lifting of the hydraulic lifting platform.

[0017] The hydraulic lifting platform located above has the same structure as the thick iron plate.

[0018] Preferably, each of the two movable doors is provided with a movable buckle, and multiple movable buckles are provided to position the mesh after it is compacted, so as to prevent the mesh from springing back.

[0019] Preferably, both of the thick iron plates are provided with grooves, and multiple grooves are provided so that workers can bind the wire mesh through the grooves;

[0020] The packing component includes an inclined ramp set in a trench, a slider slidably set in the inclined ramp, and a sliding groove opened on the inclined ramp. The slider is equipped with a clamp to pass the rope through the trench for packing. A pull rope is connected to one side of the slider so that it can be reset and adjusted after packing.

[0021] Each slider is equipped with a roller at its bottom, and multiple rollers are provided to ensure that the rope can be smoothly passed to the other side, thereby completing the packaging and bundling work.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention enables workers to reduce the number of manual laborers when stacking and packaging wire mesh. At the same time, the mechanical wire mesh stacking method reduces the labor intensity of workers. With the cooperation of the hydraulic mechanism, the wire mesh can be squeezed and packaged, which greatly reduces the volume occupied by the wire mesh and thus saves space in the warehouse storage and transportation process.

[0024] 2. This invention uses a servo motor in conjunction with a lead screw to make the device respond faster and more smoothly. During use, it greatly reduces the vibration of the device, thereby improving the working efficiency of the netting and pressing.

[0025] 3. The present invention, through the setting of rollers and clamps, enables the rope used for binding to slide stably from one side to the other side, making it convenient for workers to bind. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the prior art netting device of the present invention;

[0027] Figure 2This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 For the present invention Figure 2 Another structural diagram;

[0029] Figure 4 For the present invention Figure 3 Another structural diagram;

[0030] Figure 5 For the present invention Figure 4 Partial structural diagram;

[0031] Figure 6 For the present invention Figure 5 Partial cross-sectional diagram of the structure;

[0032] Figure 7 This is a schematic diagram of the adjusting component structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the pressing part structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the slider structure of the present invention;

[0035] Figure 10 This is a schematic diagram of the plane in which the iron rod of the present invention is placed.

[0036] In the diagram: 1-Frame base; 2-Stacking net frame; 3-Net-swinging mechanism; 31-Support frame; 32-Cylindrical linear guide rail; 33-Sliding frame; 34-Positioning seat; 35-Screw rod; 36-Servo motor; 37-Folding plate; 4-Net-swinging frame; 5-Adjusting component; 51-Net-infeed frame; 52-Rotating disk; 53-U-shaped frame; 54-Fixing frame; 55-Adjusting plate; 56-Positioning clamp; 57-Circular groove; 58-Insertion rod; 6-Hydraulic mechanism; 61-Liquid... 62-Hydraulic oil pump; 63-Moving door; 64-Groove; 7-Upper pressing section; 71-Upper hydraulic cylinder; 72-Thick iron plate; 73-Guide column; 8-Lower pressing section; 81-Hydraulic lifting platform; 82-Cross plate; 83-Main shaft; 84-Lower hydraulic cylinder; 85-Straight groove; 86-Moving buckle; 9-Packaging component; 91-Inclined ramp; 92-Slider; 93-Sliding groove; 94-Clamp; 95-Pull rope; 96-Roller. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1-10 The present invention provides a technical solution: a device integrating the functions of stacking and pressing nets, including a frame base 1 and a stacking net frame 2 disposed on one side of the frame base 1. The frame base 1 and the stacking net frame 2 are common existing structures, and will not be described in detail here.

[0039] A net-stacking mechanism 3 is provided between the frame base 1 and the stacking net frame 2. A net-stacking frame 4 is provided on the stacking net frame 2. On each side of the net-stacking frame 4, a person stacks the net according to the net-stacking frequency. Multiple iron rods are provided. The iron rods are squeezed by the movable buckle 86. The net-stacking mechanism 3 includes a support frame 31 provided on the stacking net frame 2. A cylindrical linear guide rail 32 is provided between the support frame 31 and the frame base 1. There are two cylindrical linear guide rails 32. A sliding frame 33 is slidably provided between the two cylindrical linear guide rails 32. A positioning seat 34 is provided between the two cylindrical linear guide rails 32.

[0040] A lead screw 35 is rotatably mounted on the positioning seat 34, a servo motor 36 is mounted on the frame seat 1, the end of the lead screw 35 is connected to the output end of the servo motor 36, the sliding frame 33 is threadedly connected to the lead screw 35, and folding plates 37 are provided on both sides of the sliding frame 33, and the swing net frame 4 is located between the two folding plates 37.

[0041] It also includes an adjusting component 5, which includes an inlet frame 51 mounted on a support frame 31. A rotating disk 52 is rotatably mounted on the support frame 31. Both the inlet frame 51 and the swing frame 4 are welded from stainless steel pipes with smooth surfaces. The rotating disk 52 is equipped with bearings at both ends so that it can rotate easily. The purpose is to reduce the frictional resistance of the net during the swing process so that the net can be introduced into the swing frame 4 from the inlet frame 51 through the rotating disk 52. A U-shaped frame 53 is mounted on the support frame 31. A fixing frame 54 is mounted on the U-shaped frame 53. An adjusting plate 55 is slidably mounted on the fixing frame 54. A positioning clamp 56 is mounted at the bottom of the adjusting plate 55.

[0042] The adjusting plate 55 has a circular groove 57, and multiple sets of circular grooves 57 are provided. The fixing frame 54 has the same structure as the circular groove 57. A rod 58 is inserted into the circular groove 57. By adjusting the rod 58 to be inserted into different circular grooves 57, the positioning clamp 56 can be moved and adjusted to ensure that mesh sheets of different sizes can be used normally.

[0043] A hydraulic mechanism 6 is also provided, which is installed on the stacked mesh frame 2. The hydraulic mechanism 6 includes a hydraulic oil tank 61 and a hydraulic oil pump 62 installed at the bottom of the frame base 1. Because they occupy a large space, the hydraulic oil tank 61 and the hydraulic oil pump 62 are fixed at the bottom of the frame base 1 to enhance the stability of the overall frame structure. A control cabinet is provided on the frame base 1 to control the servo motor 36, the upper hydraulic cylinder 71 and the lower hydraulic cylinder 84. An upper pressing part 7 and a lower pressing part 8 are provided on the stacked mesh frame 2 so that the mesh can be compacted by the opposite movement of the upper pressing part 7 and the lower pressing part 8.

[0044] The stacked mesh frame 2 is provided with movable doors 63 on both sides. When the upper pressing part 7 and the lower pressing part 8 are working, the movable doors 63 on both sides are closed to prevent the mesh from being squeezed out. Movable buckles 86 are provided on both sides of the movable doors 63. Multiple movable buckles 86 are provided. When the hydraulic mechanism 6 releases the mesh, the movable buckles 86 are used to press down the iron rod to prevent the mesh from rebounding.

[0045] The upper pressing part 7 includes an upper hydraulic cylinder 71 installed on the stacked mesh frame 2. A thick iron plate 72 is installed at the bottom of the upper hydraulic cylinder 71, and a guide column 73 is installed on the thick iron plate 72. The guide column 73 penetrates the top of the stacked mesh frame 2 to ensure that the thick iron plate 72 can be raised and lowered stably.

[0046] The sliding frame 33 has a U-shaped structure to avoid interference during the mesh stacking process.

[0047] The pressing part 8 includes two hydraulic lifting platforms 81 respectively installed on the stacked grid frame 2. Cross plates 82 are rotatably installed on both sides of the interior of the two hydraulic lifting platforms 81. The middle of the two cross plates 82 are connected by a rotating shaft, and a main shaft 83 is rotatably installed between the two cross plates 82.

[0048] A lower hydraulic cylinder 84 is rotatably mounted between any of the lower main shafts 83 and the middle main shaft 83. Straight slots 85 are opened on both sides of the upper hydraulic lifting platform 81 to allow the upper main shaft 83 to shift and adjust, thereby ensuring stable lifting and lowering of the hydraulic lifting platform 81. The upper hydraulic cylinder 71 is composed of a long-stroke hydraulic cylinder and plays the main role in pressing the mesh; the lower hydraulic cylinder 84 has a shorter stroke and its function is to raise the mesh for easy transport by the tool cart. When pressing the mesh, the upper hydraulic cylinder 71 and the lower hydraulic cylinder 84 act simultaneously: the upper hydraulic cylinder 71 presses downwards, and the lower hydraulic cylinder 84 presses upwards, which can increase the pressing speed.

[0049] The hydraulic lifting platform 81 located above has the same structure as the thick iron plate 72.

[0050] A packing component 9 is also provided, and grooves 64 are provided on both of the thick iron plates 72. Multiple grooves 64 are provided so that workers can bind the mesh through the grooves 64.

[0051] The packing component 9 includes an inclined ramp 91 set in the trench 64, a slider 92 slidably set in the inclined ramp 91, and a sliding groove 93 opened on the inclined ramp 91. A clip 94 is set on the slider 92 so that the rope can be passed through the trench 64 for packing. A pull rope 95 is connected to one side of the slider 92 so that it can be reset and adjusted after packing.

[0052] Each slider 92 is equipped with a roller 96 at its bottom. Multiple rollers 96 are provided to ensure that the rope can be smoothly passed to the other side, thereby completing the packaging and bundling work.

[0053] During use, the insertion rod 58 is adjusted to engage with different circular slots 57, thereby adjusting the position of the positioning clamp 56. This ensures that mesh sheets of different sizes can be used normally, preventing excessive feeding of mesh sheets and resulting mesh sheet accumulation when the hydraulic mechanism 6 presses the mesh tray, which would affect the normal operation of the swaying mesh. The servo motor 36 drives the lead screw 35 to rotate, which in turn drives the sliding frame 33 to slide on the cylindrical linear guide rail 32. The sliding frame 33 drives the swaying mesh frame 4 to sway the mesh back and forth. On each side of the swaying mesh frame 4, one person stacks the mesh according to the swaying frequency. The swaying and stacking sequence is as follows:

[0054] When the net frame 4, carrying the netting, reaches the far left, the worker on the left removes the bottom iron rod and places it on top of the netting. At this point, the net frame 4 begins to swing to the right. During this swing, the tension will tighten the netting on the stacked net frame 2. When the net frame 4, carrying the netting, reaches the far right, the worker on the right removes the bottom iron rod and places it on top of the netting. The same process is repeated when the net frame 4 swings from right to left. After this back-and-forth arrangement, the netting will be stacked layer upon layer on the stacked net frame 2. Each time the netting is arranged, the workers take turns removing the bottom iron rod and placing it on top of the netting. Repeat this process until all the mesh sheets are stacked in the stacking frame 2. Because the polyethylene monofilament knotless mesh is elastic, it will inevitably bounce up after multiple layers are stacked, making it look fluffy. This requires using the upper hydraulic cylinder 71 and the lower hydraulic cylinder 84 to compact the mesh sheets multiple times. Tie it with rope and then loosen the upper hydraulic cylinder 71 and the lower hydraulic cylinder 84. Considering that the polyethylene monofilament mesh sheets are very elastic, the hydraulic press must be turned on to compact the mesh sheets after every 8-10 layers of mesh sheets, and the rotatable buckles at the corresponding height must be opened to press down the iron rods to prevent the mesh sheets from rebounding.

[0055] The specific operating steps are as follows:

[0056] 1. Adjust the servo motor 36 according to the specifications of the polyethylene monofilament knotless net, such as width, length, and number of yarns, and select an appropriate net-laying speed;

[0057] 2. After passing the net sheet through the net frame 51 and the rotating disk 52 in sequence, introduce it into the net frame 4. Press one end of the net sheet tightly against the bottom surface of the net frame 2 with an iron rod. Make the whole net as smooth as possible under natural conditions to reduce the frictional resistance of the net. At the same time, close the movable doors 63 on both sides.

[0058] 3. Two workers are holding iron rods and preparing to place them. After pressing the button on the start control cabinet, they begin to set up the net. Each time the net is set up, the workers pull out the bottom iron rod and place it on top of the net according to the rhythm of setting up the net. The iron rod uses its own weight to press down the net so that it does not fall apart.

[0059] 4. After the netting is stacked, the upper hydraulic cylinder 71 and the lower hydraulic cylinder 84 are activated to press the loose netting down. Then, the rope is clamped on the clamp 94, and the rope 95 is released. Under the action of the inclined ramp 91, the slider 92 and the roller 96, the rope can reach the other side. The netting can then be tied in three sections by the rope and pushed out, completing the packing of one netting. When the packing is completed, the worker opens the movable door 63 to push out the tied netting. Then, the netting mechanism 3 and the hydraulic mechanism 6 are reset to start the next netting stacking and packing.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device integrating stacking and pressing functions, comprising a frame base (1) and a stacking frame (2) disposed on one side of the frame base (1), Its features are: A net-swinging mechanism (3) is provided between the frame base (1) and the stacking frame (2), and a net-swinging frame (4) is provided on the stacking frame (2) so that the net-swinging mechanism (3) drives the net-swinging frame (4) to reciprocate and move, thereby realizing the stacking of the net sheet; A hydraulic mechanism (6) is also provided. The hydraulic mechanism (6) is set on the stacking frame (2). The hydraulic mechanism (6) is used in conjunction with the net-laying mechanism (3) to compact the stacked net sheets during the stacking process. It is also equipped with a packing component (9) to pack the compacted wire mesh. The net-laying mechanism (3) includes a support frame (31) set on the stacked net frame (2), a cylindrical linear guide rail (32) is provided between the support frame (31) and the frame base (1), there are two cylindrical linear guide rails (32), a sliding frame (33) is slidably arranged between the two cylindrical linear guide rails (32), and a positioning seat (34) is provided between the two cylindrical linear guide rails (32); A lead screw (35) is rotatably mounted on the positioning seat (34), a servo motor (36) is mounted on the frame seat (1), the end of the lead screw (35) is connected to the output end of the servo motor (36), the sliding frame (33) is threadedly connected to the lead screw (35), and folding plates (37) are provided on both sides of the sliding frame (33), and the swing net frame (4) is located between the two folding plates (37); It also includes an adjusting component (5) to prevent the wire mesh from being overloaded and piling up when the hydraulic mechanism (6) presses the wire mesh. The adjusting component (5) includes an inlet frame (51) mounted on a support frame (31), a rotating disk (52) rotatably mounted on the support frame (31) so that the net sheet can be introduced into the swing net frame (4) from the inlet frame (51) via the rotating disk (52), a U-shaped frame (53) mounted on the support frame (31), a fixing frame (54) mounted on the U-shaped frame (53), an adjusting plate (55) slidably mounted on the fixing frame (54), and a positioning clamp (56) mounted at the bottom of the adjusting plate (55). The adjusting plate (55) has a circular groove (57) and multiple sets of circular grooves (57). The fixing frame (54) has the same structure as the circular groove (57). A rod (58) is inserted into the circular groove (57). By adjusting the rod (58) to be inserted into different circular grooves (57), the positioning clamp (56) can be moved and adjusted to ensure that mesh sheets of different sizes can be used normally. The hydraulic mechanism (6) includes a hydraulic oil tank (61) and a hydraulic oil pump (62) located at the bottom of the frame base (1). The stacked mesh frame (2) is provided with an upper pressing part (7) and a lower pressing part (8) so that the mesh can be compacted by the opposite movement of the upper pressing part (7) and the lower pressing part (8). The stacked mesh frame (2) is provided with movable doors (63) on both sides. When the upper pressing part (7) and the lower pressing part (8) are working, the movable doors (63) on both sides are closed to prevent the mesh from being squeezed out. The upper pressing part (7) includes an upper hydraulic cylinder (71) installed on the stacked mesh frame (2). The bottom of the upper hydraulic cylinder (71) is provided with a thick iron plate (72), and a guide column (73) is provided on the thick iron plate (72). The guide column (73) penetrates the top of the stacked mesh frame (2) to ensure that the thick iron plate (72) can be raised and lowered stably. The sliding frame (33) has a U-shaped structure to avoid interference during the mesh stacking process; The pressing part (8) includes two hydraulic lifting platforms (81) respectively set on the stacked grid frame (2). The two hydraulic lifting platforms (81) are respectively rotatably provided with cross plates (82) on both sides inside. The two cross plates (82) are connected in the middle by a rotating shaft, and a main shaft (83) is rotatably provided between the two cross plates (82). A lower hydraulic cylinder (84) is rotatably provided between any of the lower main shafts (83) and the middle main shaft (83), and straight slots (85) are opened on both sides of the upper hydraulic lifting platform (81) so that the upper main shaft (83) can be moved and adjusted, thereby ensuring the stable lifting of the hydraulic lifting platform (81). The hydraulic lifting platform (81) located above has the same structure as the thick iron plate (72).

2. The device integrating the functions of stacking and pressing according to claim 1, characterized in that: Both sides of the movable door (63) are provided with movable buckles (86), and multiple movable buckles (86) are provided to position the mesh after it is compacted and prevent the mesh from springing back.

3. The device integrating the functions of stacking mesh and pressing according to claim 2, characterized in that: Both of the thick iron plates (72) are provided with grooves (64), and multiple grooves (64) are provided so that workers can bind the wire mesh through the grooves (64); The packing component (9) includes an inclined ramp (91) set in a trench (64), a slider (92) is slidably arranged in the inclined ramp (91), and a sliding groove (93) is opened on the inclined ramp (91). A clip (94) is provided on the slider (92) so that the rope can be passed through the trench (64) for packing. A pull rope (95) is connected to one side of the slider (92) so that it can be reset and adjusted after packing. Each slider (92) is equipped with a roller (96) at its bottom. Multiple rollers (96) are provided to ensure that the rope can reach the other side and thus complete the packaging and bundling work.

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