Automatic rubber band binding equipment

Abstract

The utility model discloses automatic rubber band binding equipment which comprises a rack, a belt conveyor is arranged on the front side of the rack, a vibration disc is installed on the lower portion of the rear side of the rack, the upper portion of the rack is in transmission connection with a sliding base through a linear displacement mechanism, the sliding base is fixedly connected with a mounting plate extending downwards, and a first air cylinder is installed on the mounting plate. The telescopic end of the first air cylinder is connected with a grabbing mechanism, a lifting device is installed at the position, between the belt conveyor and the vibration disc, of the lower portion of the rack, an expansion mechanism is installed on the lifting device, a pushing mechanism is installed on the expansion mechanism, and the grabbing mechanism can be driven to reach the front of the expansion mechanism through a linear displacement mechanism. And a plurality of positioning mechanisms are fixedly connected to the belt conveyor. The electric telescopic rod is controlled to contract, the first push plate is driven to move between the two limiting plates, all the products are pushed to move towards the baffle, the ends of all the products are aligned, all the products do not need to be aligned manually, and the binding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bundling device technical field, concretely is a rubber band automatic strapping equipment. BACKGROUND

[0002] When producing and manufacturing products with a certain length, the finished products need to be strapped, that is, the bunched finished products are bundled together, so that the products can be kept under management and will not be loose.

[0003] After searching, it is found that the Chinese utility model patent with the authorization publication number CN222496759U discloses a medical strapping bundling device, and according to the specification, the bunched strapping is conveyed by the conveying assembly, the bunched strapping is bundled with rubber bands by the bundling assembly, the rubber bands are hung on the expansion rods of the expansion mechanism by the clamping mechanism in the bundling assembly, the rubber bands are expanded by the expansion rods and are pushed out by the pushing mechanism to be bundled on the bunched strapping, the process does not need manual participation throughout, realizes automatic bundling, can improve production efficiency, and can save labor cost.

[0004] However, the bundling device in the above-mentioned patent has the following problems: (1) only the baffles arranged oppositely are installed on the conveying belt, after the products are placed between the two baffles, the ends of the products may not be neat, which can easily cause the rubber bands to be difficult to bundle all the products together, at this time, manual pushing of the products is needed to align the ends of all the products, which is very inconvenient. (2) because the sizes of the products are different, some products are high and some products are low, and the height of the expansion mechanism cannot be adjusted, so it is difficult for the rubber bands to be accurately sleeved on the products of different sizes after being expanded. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a rubber band automatic strapping equipment to solve the problem that the ends of the products are difficult to align before being bundled at present, which causes all the products to be bundled.

[0006] To solve the above technical problems, the utility model provides the following technical scheme:

[0007] The application relates to an automatic rubber band binding equipment, which comprises a rack, a belt conveyor arranged on the front side of the rack, a vibrating disc arranged on the lower part of the rear side of the rack and used for placing rubber bands, a sliding seat connected with the upper part of the rack through a linear displacement mechanism, a downwardly-extending mounting plate fixedly connected with the sliding seat, a first air cylinder arranged on the mounting plate, a grabbing mechanism connected with the extension end of the first air cylinder and used for grabbing the rubber bands in the vibrating disc, a lifting device arranged on the lower part of the rack between the belt conveyor and the vibrating disc, an expansion mechanism arranged on the lifting device and used for expanding the rubber bands, a pushing mechanism arranged on the expansion mechanism and used for pushing the rubber bands to move towards the belt conveyor, a plurality of positioning mechanisms fixedly connected with the belt conveyor, a first opening extending upwards and downwards of the belt conveyor and arranged on one end of the rack, a second opening extending downwards of the belt conveyor and arranged on the lower part of the other end of the rack, the positioning mechanisms moving in the first opening and the second opening along with the rotation of the conveying belt of the belt conveyor, the positioning mechanism comprising a bottom plate, limiting plates fixedly connected with the two sides of the bottom plate, a first push plate slidingly connected between the two limiting plates, an electric telescopic rod arranged on the outer side of one of the limiting plates, a second air cylinder arranged in the first opening, a baffle connected with the extension end of the second air cylinder, the baffle being arranged between the belt conveyor and the expansion mechanism, the baffle moving to the lower part of the front side of the expansion mechanism and aligning with the opening end of the positioning mechanism through the extension of the second air cylinder, a strip-shaped hole being arranged on the limiting plate where the electric telescopic rod is arranged, a sliding groove being arranged on the other limiting plate, a sliding block being fixedly connected with the two ends of the first push plate, one of the sliding blocks slidingly connected in the sliding groove, the other sliding block passing through the strip-shaped hole and connected with an adapter block through the passing end, and the extension end of the electric telescopic rod being connected with the adapter block.

[0008] Preferably, the lifting device comprises two third air cylinders arranged on the inner bottom of the rack, and a cross beam connected with the extension ends of the two third air cylinders, and the expansion mechanism is arranged on the cross beam.

[0009] Through the above technical scheme, the third air cylinder is controlled to work, the cross beam is driven to lift, and the expansion mechanism is driven to lift, so that the expanded rubber bands can be aligned with the products.

[0010] Preferably, the linear displacement mechanism comprises a fixed plate arranged on the upper part of the rack, bearing seats fixedly arranged on the two ends of the fixed plate, a screw rod rotatably connected with the two bearing seats through rotary bearings, a guide rail fixedly connected with the fixed plate, a motor arranged on one end of the fixed plate and in transmission connection with the screw rod, screw holes arranged on the sliding seat and in threaded connection with the screw rod, and one side of the sliding seat in sliding connection with the guide rail.

[0011] The above technical solution involves placing rubber bands inside a vibratory feeder. The vibratory feeder arranges the scattered rubber bands sequentially for the gripping mechanism to grasp. During gripping, the first cylinder extends, causing the L-shaped plate to descend, and the sixth cylinder extends, causing the pneumatic fingers to descend. The pneumatic fingers then grasp the rubber bands in the vibratory feeder. After grasping, both the first and sixth cylinders retract, and the motor is started, driving the lead screw to rotate and moving the slide towards the belt conveyor. This allows the rubber bands to pass around the expansion mechanism. Then, the first and sixth cylinders extend again, bringing the rubber bands to one end of the four expansion rods. Finally, the motor rotates in the opposite direction, causing the slide to move back, thus securing the rubber bands onto the four expansion rods for expansion.

[0012] Preferably, the expansion mechanism includes a support block fixedly connected to a crossbeam, a horizontal plate connected to the support block, a U-shaped cover connected to the horizontal plate, a fourth cylinder installed at both ends of the bottom surface of the horizontal plate, a rack fixedly connected to the telescopic end of the fourth cylinder, the rack being movably disposed inside the cover, three vertically arranged rotating shafts rotatably connected to the inner walls of both sides of the cover via rotating bearings, a first gear and a connecting rod fixedly connected to the two upper rotating shafts on each side, a second gear fixedly connected to the lower rotating shaft, the second gear meshing with the rack, the second gear and the two first gears meshing sequentially from bottom to top, the two connecting rods on each side being arranged in an X-shape, and the connecting rod on the lower rotating shaft being located inside the other connecting rod, expansion rods being connected to the opposite ends of the connecting rods at both ends, the four expansion rods being arranged in a rectangular array and extending towards the belt conveyor.

[0013] With the above technical solution, when the rubber band is looped onto the four expansion rods, the fourth cylinder is controlled to work. Through the cooperation of the rack and the second gear, the two first gears are driven to rotate in the same direction. Since the two connecting rods are distributed in an X shape, and one connecting rod is located inside the other connecting rod, when the two first gears rotate in the same direction, they will drive the two upper shafts to rotate in the same direction. Then, through the action of the connecting rods, one expansion rod is driven to move upward and the other expansion rod is driven to move downward, thereby expanding the rubber band.

[0014] Preferably, the pushing mechanism includes a fifth cylinder installed on the outer walls of both sides of the cover, a U-shaped connecting plate connected to the telescopic ends of the two fifth cylinders, a second push plate connected to both sides of the connecting plate and extending relative to each other, and four expansion rods located between the two second push plates.

[0015] After the rubber band expands, the fifth cylinder extends, driving the connecting plate to move towards the belt conveyor. The connecting plate drives the second push plate, which pushes the expanded rubber band, thus putting the rubber band on the product and binding the product.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) the bundled products are placed on the base plate, the products are prevented from scattering outward by the action of the two limiting plates, the second cylinder is controlled to extend, the baffle is pushed to be blocked at one end of the base plate close to the expansion mechanism, then the electric telescopic rod is controlled to retract, the first push plate is driven to move between the two limiting plates and push all the products to move towards the baffle, so that the end portions of all the products are aligned, then the second cylinder is controlled to retract, the baffle is separated from the positioning mechanism, so that the rubber band is sleeved on the products, manual alignment of all the products is not needed, and the bundling efficiency is improved.

[0018] (2) the lifting device is arranged, the expansion mechanism can be driven to lift through the lifting device, so that the height of the expansion mechanism is adjusted, so that the rubber band after expansion can be accurately sleeved on the products, and the adaptability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 it is a schematic view of the utility model;

[0020] Figure 2 it is a schematic view of the positioning mechanism;

[0021] Figure 3 it is a partial schematic view of the utility model;

[0022] Figure 4 it is a schematic view of the expansion mechanism;

[0023] Figure 5 it is a schematic view of the expansion mechanism;

[0024] In the drawing: 1 - rack, 2 - belt conveyor, 3 - vibration disc, 4 - linear displacement mechanism, 401 - fixed plate, 402 - bearing seat, 403 - screw rod, 404 - guide rail, 405 - motor, 5 - sliding seat, 6 - mounting plate, 7 - first cylinder, 8 - grabbing mechanism, 801 - L-shaped plate, 802 - sixth cylinder, 803 - pneumatic finger, 9 - lifting device, 901 - third cylinder, 902 - crossbeam, 10 - expansion mechanism, 1001 - support block, 1002 - cross plate, 1003 - cover, 1004 - fourth cylinder, 1005 - toothed rod, 1006 - rotating shaft, 1007 - first gear, 1008 - connecting rod, 1009 - second gear, 1010 - expansion rod, 11 - pushing mechanism, 1101 - fifth cylinder, 1102 - connecting plate, 1103 - second push plate, 12 - positioning mechanism, 1201 - base plate, 1202 - limiting plate, 1203 - first push plate, 1204 - electric telescopic rod, 1205 - second cylinder, 1206 - baffle, 1207 - strip-shaped hole, 1208 - sliding groove, 1209 - sliding block, 1210 - adapter block, 13 - first opening, 14 - second opening, 15 - rubber band. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] Please refer to Figures 1-5 A rubber band automatic binding equipment, including frame 1, frame 1's front side is equipped with belt conveyor 2, belt conveyor 2 is prior art, it is driven by servo motor and is moved to the conveyor, realizes to convey, this embodiment is not described in detail again. The lower part of the rear side of frame 1 is provided with a vibrating disc 3 for placing rubber bands, and a slide 5 is drivingly connected to the upper part of the frame 1 through a linear displacement mechanism 4, and the slide 5 is driven to move linearly by the linear displacement mechanism. Specifically, the linear displacement mechanism 4 includes a fixed plate 401 mounted on the upper part of the frame, two bearing seats 402 fixed at the ends of the fixed plate, a lead screw 403 rotatably connected to the two bearing seats 402 through rotary bearings, a guide rail 404 fixedly connected to the fixed plate 401, a motor 405 drivingly connected to the lead screw 403 mounted at one end of the fixed plate 401, a screw hole formed in the slide 5 and threadedly connected to the lead screw 403, and the slide 5 slidably connected to the guide rail 404 at one side. Starting the motor 405 drives the lead screw 403 to rotate, which can drive the slide 5 to move linearly on the guide rail 404, thereby driving the grabbing mechanism 8 to move towards the belt conveyor 2.

[0028] The belt conveyor 2 is fixedly connected with a plurality of positioning mechanisms 12, one end of the rack 1 is provided with a first opening 13 extending above and below the belt conveyor 2, and the other end of the rack 1 is provided with a second opening 14 extending below the belt conveyor 2, when the conveying belt of the belt conveyor 2 rotates, the positioning mechanism 12 can move in the first opening 13 and the second opening 14 with the conveying belt; the positioning mechanism 12 comprises a bottom plate 1201, limiting plates 1202 fixedly connected to both sides of the bottom plate, a first push plate 1203 slidingly connected between the two limiting plates, an electric telescopic rod 1204 mounted on the outside of one of the limiting plates, a second air cylinder 1205 mounted in the first opening, a baffle 1206 connected to the telescopic end of the second air cylinder, the baffle 1206 is located between the belt conveyor 2 and the expansion mechanism 10, through the extension of the second air cylinder 1205, the baffle 1206 can be moved below the front side of the expansion mechanism 10 and aligned with the opening end of the positioning mechanism 12, a strip-shaped hole 1207 is formed in the limiting plate 1202 where the electric telescopic rod is mounted, a sliding groove 1208 is formed in the other limiting plate 1202, both ends of the first push plate 1203 are fixedly connected with sliding blocks 1209, one of the sliding blocks 1209 is slidingly connected in the sliding groove 1208, the other sliding block 1209 passes through the strip-shaped hole 1207 and is connected with an adapter block 1210 at the passing end, and the telescopic end of the electric telescopic rod 1204 is connected with the adapter block 1210. Place the bunched products on the bottom plate 1201, prevent the products from scattering outward through the action of the two limiting plates 1202, control the extension of the second air cylinder 1205, push the baffle 1206 to block the end of the bottom plate 1201 close to the expansion mechanism 10, then control the electric telescopic rod 1204 to retract, drive the first push plate 1203 to move between the two limiting plates 1202, and push all the products to move towards the baffle 1206, so that the ends of all the products are aligned, then control the second air cylinder 1205 to retract, so that the baffle 1206 moves away from the bottom plate 1201, so that the rubber band can be sleeved on the products, without manually aligning all the products, improving the efficiency of bundling. The bottom plate 1201 is provided with a cavity, a battery and a control board are mounted in the cavity and are electrically connected with the electric telescopic rod for power supply. In addition, in order to enable the positioning mechanism to accurately reach the expansion mechanism each time, a position sensor can be arranged on the positioning mechanism and the expansion mechanism to enable the expansion mechanism to accurately sense the position of the positioning mechanism.

[0029] The slide 5 is fixedly connected with a downward extending mounting plate 6, the first cylinder 7 is installed on the mounting plate 6, the telescopic end of the first cylinder 7 is connected with a grabbing mechanism 8 for grabbing the rubber band in the vibration disc 3, the grabbing mechanism 8 comprises an L-shaped plate 801 connected with the telescopic end of the first cylinder, the sixth cylinder 802 is installed on the L-shaped plate 801, the telescopic end of the sixth cylinder 802 is connected with a pneumatic finger 803, the pneumatic finger 803 is prior art, and the embodiment will not be described in detail, the pneumatic finger 803 is located above the vibration disc 3, and the pneumatic finger 803 is aligned with the vertical plane where the center points of the four expansion rods 1010 are located, when the slide 5 moves towards the belt conveyor 2, since the pneumatic finger 803 is aligned with the four expansion rods 1010, the pneumatic finger 803 can put the grabbed rubber band on the four expansion rods 1010.

[0030] The expansion mechanism 10 for expanding the rubber band is installed between the belt conveyor 2 and the vibration disc 3 at the lower part of the rack 1, the height of the expansion mechanism 10 is adjustable, the pushing mechanism 11 for pushing the rubber band to move towards the belt conveyor 2 is installed on the expansion mechanism 10, and the grabbing mechanism 8 can be driven to the front of the expansion mechanism 10 by the linear displacement mechanism 4. The expansion mechanism 10 comprises a support block 1001, the support block 1001 is connected with a horizontal plate 1002, the horizontal plate 1002 is connected with a U-shaped cover 1003, the fourth cylinder 1004 is installed at the two ends of the bottom surface of the horizontal plate 1002, the telescopic end of the fourth cylinder 1004 is fixedly connected with a gear rod 1005, the gear rod 1005 is movably arranged in the cover 1003, the inner walls of the two sides of the cover 1003 are both rotationally connected with three up-and-down arranged rotating shafts 1006 through rotating bearings, the first gear 1007 and the connecting rod 1008 are fixedly connected with the two rotating shafts 1006 above each side, the second gear 1009 is fixedly connected with the lowermost one of the rotating shafts 1006, the second gear 1009 is engaged with the gear rod 1005, the second gear 1009 and the two first gears 1007 are engaged in sequence from bottom to top, the two connecting rods 1008 of each side are distributed in X shape, and the connecting rod 1008 on the lower rotating shaft is located inside the other connecting rod 1008, the expansion rods 1010 are connected with the opposite ends of the two end connecting rods 1008, the four expansion rods 1010 are arranged in a rectangular array and extend towards the belt conveyor 2. The fourth cylinder 1004 is controlled to work, the two first gears 1007 are driven to rotate in the same direction through the cooperation of the gear rod 1005 and the second gear 1009, since the two connecting rods 1008 are distributed in X shape and one connecting rod 1008 is located inside the other connecting rod 1008, when the two first gears 1007 rotate in the same direction, the two rotating shafts 1006 above will be driven to rotate in the same direction, and through the action of the connecting rod 1008, one expansion rod 1010 is driven to move upwards and the other expansion rod 1010 is driven to move downwards, so that the expansion of the rubber band is realized.

[0031] The pushing mechanism 11 includes fifth cylinders 1101 mounted on the outer walls of the two sides of the housing, a connecting plate 1102 connected to the telescopic ends of the two fifth cylinders and in U shape, second pushing plates 1103 connected to the two sides of the connecting plate and extending oppositely, and four expansion rods 1010 located between the two second pushing plates 1103. The fifth cylinders 1101 are controlled to extend, driving the connecting plate 1102 to move towards the belt conveyor 2, the connecting plate 1102 driving the second pushing plates 1103, the second pushing plates 1103 pushing the expanded rubber bands, so as to wrap the rubber bands on the products, thereby bundling the products.

[0032] The working principle of the embodiment is as follows:

[0033] The rubber bands 15 are placed in the vibration disc 3 and are arranged in sequence by the vibration disc 3 for being grabbed by the grabbing mechanism 8. When grabbing, the first cylinder 7 is controlled to extend, driving the L-shaped plate 801 to descend, then the sixth cylinder 802 is controlled to extend, driving the pneumatic fingers 803 to descend, the rubber bands in the vibration disc 3 are grabbed by the pneumatic fingers 803, after grabbing, the first cylinder 7 and the sixth cylinder 802 are retracted, then the motor 405 is started, driving the screw rod 403 to rotate, driving the sliding seat 5 to move towards the belt conveyor 2, so that the rubber bands pass through the expansion mechanism 10, then the first cylinder 7 and the sixth cylinder 802 are controlled to extend, so that the rubber bands reach one end of the four expansion rods 1010, then the motor 405 is reversed, driving the sliding seat 5 to move back, so as to wrap the rubber bands 15 on the four expansion rods 1010. Before that, the bundled products are placed one by one on the bottom plates 1201 of the plurality of positioning mechanisms, the second cylinder 1205 is controlled to extend, driving the baffle 1206 to move, so that it is blocked at one end of the bottom plate 1201 close to the expansion mechanism 10, and is blocked at one end of the bottom plate 1201, then the electric telescopic rod 1204 is controlled to retract, driving the first pushing plate 1203 to move between the two limiting plates 1202, and driving all the products to move towards the baffle 1206, so that the ends of all the products are aligned, then the second cylinder 1205 is controlled to retract, so that the baffle 1206 moves away from the bottom plate 1201, and the products are exposed at one end of the expansion rods. At this time, the expanded rubber bands are aligned with the products, then the fifth cylinders 1101 are controlled to extend, driving the connecting plate 1102 to move towards the belt conveyor 2, the connecting plate 1102 driving the second pushing plates 1103, the second pushing plates 1103 pushing the expanded rubber bands, so as to wrap the rubber bands on the products, thereby bundling the products.

[0034] Embodiment 2

[0035] On the basis of embodiment 1, the lifting device 9 is installed between the belt conveyor 2 and the vibration plate 3 at the lower part of the rack 1, and the expansion mechanism 10 is installed on the lifting device. Specifically, the lifting device 9 comprises two third cylinders 901 installed on the bottom of the rack, a cross beam 902 connected to the telescopic ends of the two third cylinders, and the expansion mechanism 10 is installed on the cross beam 902. By controlling the operation of the third cylinder 901, the cross beam 902 can be lifted, thereby driving the expansion mechanism 10 to lift, so that the expanded rubber band can be aligned with the product. Through the lifting device, the expansion mechanism can be lifted, thereby adjusting the height of the expansion mechanism, so that the expanded rubber band can be accurately sleeved on the product, so as to adapt to products of different sizes and improve the adaptability.

[0036] It should be noted that the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0037] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatic rubber band tying device, comprising a frame (1), a belt conveyor (2) provided on the front side of the frame (1), a vibratory plate (3) for placing rubber bands installed on the lower rear side of the frame (1), a slide (5) connected to the upper part of the frame (1) via a linear displacement mechanism (4), a downwardly extending mounting plate (6) fixedly connected to the slide (5), a first cylinder (7) mounted on the mounting plate (6), and a gripping mechanism (8) for gripping rubber bands in the vibratory plate (3) connected to the telescopic end of the first cylinder (7), characterized in that: The lifting device (9) is installed between the belt conveyor (2) and the vibration plate (3) at the lower part of the frame (1), the expansion mechanism (10) for stretching the rubber band is installed on the lifting device (9), the pushing mechanism (11) for pushing the rubber band to move towards the belt conveyor (2) is installed on the expansion mechanism (10), and the linear displacement mechanism (4) can drive the grabbing mechanism (8) to reach the front of the expansion mechanism (10); A plurality of positioning mechanisms (12) are fixedly connected to the belt conveyor (2), the frame (1) is provided with the first opening (13) extending upwards and downwards of the belt conveyor (2) at one end, and the second opening (14) extending downwards of the belt conveyor (2) is arranged at the other end of the frame (1), when the conveying belt of the belt conveyor (2) rotates, the positioning mechanism (12) can move in the first opening (13) and the second opening (14) along with the conveying belt; The positioning mechanism (12) comprises a bottom plate (1201), limiting plates (1202) fixedly connected to both sides of the bottom plate, a first push plate (1203) slidingly connected between the two limiting plates, an electric telescopic rod (1204) installed on the outer side of one of the limiting plates, a second cylinder (1205) installed in the first opening, a baffle (1206) connected to the telescopic end of the second cylinder, the baffle (1206) is located between the belt conveyor (2) and the expansion mechanism (10), through the extension of the second cylinder (1205), the baffle (1206) can be moved to the lower side of the front side of the expansion mechanism (10) and aligned with the opening end of the positioning mechanism (12), a strip-shaped hole (1207) is formed in the limiting plate (1202) where the electric telescopic rod is installed, a sliding groove (1208) is formed in the other limiting plate (1202), and the two ends of the first push plate (1203) are fixedly connected with sliding blocks (1209), one of the sliding blocks (1209) is slidingly connected in the sliding groove (1208), the other sliding block (1209) passes through the strip-shaped hole (1207) and is connected with an adapter block (1210) at the passing end, and the telescopic end of the electric telescopic rod (1204) is connected with the adapter block (1210).

2. The rubber band automatic tying apparatus according to claim 1, characterized by: The lifting device (9) comprises two third cylinders (901) installed at the bottom of the frame, and a cross beam (902) connected to the telescopic ends of the two third cylinders, and the expansion mechanism (10) is installed on the cross beam (902).

3. An elastic band automatic tying apparatus according to claim 2, characterized in that: The expansion mechanism (10) comprises a support block (1001) fixedly connected to the cross beam, a horizontal plate (1002) connected to the support block (1001), a U-shaped cover (1003) connected to the horizontal plate (1002), fourth air cylinders (1004) installed at both ends of the bottom surface of the horizontal plate (1002), toothed rods (1005) fixedly connected to the telescopic ends of the fourth air cylinders (1004), the toothed rods (1005) movably arranged in the cover (1003), three upper and lower arranged rotating shafts (1006) rotatably connected to the inner walls of the two sides of the cover (1003) through rotating bearings, a first gear (1007) and a connecting rod (1008) fixedly connected to the two upper rotating shafts (1006) on each side, a second gear (1009) fixedly connected to the lowermost rotating shaft (1006), the second gear (1009) meshing with the toothed rod (1005), the second gear (1009) and the two first gears (1007) meshing from bottom to top, the two connecting rods (1008) on each side being distributed in an X shape, and the connecting rod (1008) on the lower rotating shaft being located on the inner side of the other connecting rod (1008), expansion rods (1010) connected to the opposite ends of the two connecting rods (1008), the four expansion rods (1010) being arranged in a rectangular array and extending towards the belt conveyor (2).

4. An elastic band automatic tying apparatus according to claim 3, characterized in that: The pushing mechanism (11) comprises fifth air cylinders (1101) mounted on the outer walls of the two sides of the cover, a connecting plate (1102) connected to the telescopic ends of the two fifth air cylinders and in a U shape, and second pushing plates (1103) connected to the two sides of the connecting plate and extending oppositely, the four expansion rods (1010) being located between the two second pushing plates (1103).

5. An elastic band automatic tying apparatus according to claim 4, characterized in that: The linear displacement mechanism (4) comprises a fixed plate (401) mounted on the upper part of the rack, bearing seats (402) fixed at the two ends of the fixed plate, a screw rod (403) rotatably connected to the two bearing seats (402) through rotating bearings, a guide rail (404) fixedly connected to the fixed plate (401), a motor (405) mounted at one end of the fixed plate (401) and in transmission connection with the screw rod (403), a sliding seat (5) provided with a screw hole and in threaded connection with the screw rod (403) through the screw hole, and the sliding seat (5) being in sliding connection with the guide rail (404) on one side.

6. A rubber band automatic tying device according to claim 5, characterized in that: The grabbing mechanism (8) comprises an L-shaped plate (801) connected to the telescopic end of the first air cylinder, a sixth air cylinder (802) mounted on the L-shaped plate (801), a pneumatic finger (803) connected to the telescopic end of the sixth air cylinder (802), and the pneumatic finger (803) located above the vibration disc (3).

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