Box packing belt automatic recycling and sectioning device and recycling and sectioning method

Abstract

The invention relates to the field of disassembly of packing belts of packing boxes, and particularly discloses an automatic recycling and sectioning device and method for a box packing belt, the automatic recycling and sectioning device comprises a recycling and feeding mechanism, a recycling and cutting mechanism, a tail end discharging mechanism, a power mechanism and an auxiliary device, and the recycling and feeding mechanism comprises a pressing air cylinder, an upper roller assembly and a lower roller; the recycling and shearing mechanism comprises a belt cutting air cylinder cutter set. The tail end discharging mechanism comprises a pressing belt wheel air cylinder, an upper pressing belt wheel and a lower pressing belt wheel. The power mechanism comprises a motor; the auxiliary device comprises a position sensor, a rack and a synchronous belt. According to the recycling and sectioning method, the two ends of the packing belt are tensioned, and then the upper blade and the lower blade are used for shearing. By the adoption of the packing belt recycling device, packing belts with different thicknesses can be recycled according to whether the packing belts are bent or not, the packing belts can be prevented from remaining in equipment through an internal mechanical structure, efficient operation of the mechanism is guaranteed, and automation and high efficiency of packing belt recycling are achieved.

Description

Technical Field

[0001] The invention relates to the field of packing box strapping removal, and in particular to a box body strapping automatic recycling and cutting device and recycling and cutting method. Background Art

[0002] Strapping tape is a composite material widely used for box strapping. It is usually made of polypropylene (PP), polyester (PET), paper tape and nylon tape. It is often used in logistics, warehousing, manufacturing, electronic products and carton packaging. When using it, the box strapping tape must be disassembled, so it is particularly important to cut and recycle the strapping tape. In the field of assembly lines, the speed of disassembly will affect work efficiency. Some existing strapping tape disassembly equipment does not cut the strapping tape into sections, which is not conducive to the collection of strapping tape and subsequent recycling.

[0003] In order to solve the problem of strapping tape recycling, the existing applicant has proposed a strapping tape fixed-length output cutting device, which recycles the strapping tape in the form of a cutter transported by a roller. Due to the lack of device constraints, the strapping tape is not easy to enter the cutter position, resulting in recycling failure; when the strapping tape completely passes through the roller and cannot be further transported to the cutter position, a large amount of end strapping tape accumulates, resulting in the inability to normally recycle the subsequent strapping tape.

[0004] In order to solve the problem of recycling strapping tape segments, the existing recycling technology has certain defects, and the strapping tape is prone to deviation, resulting in recycling failure. When the strapping tape is greatly bent, it cannot be cut. Most of the existing strapping tape recycling technologies are for single-layer strapping tape. When the strapping tape at the joint of the strapping tape that has been used on the packaging box is double-layered or multi-layered, the recycling process is likely to cause the equipment to get stuck. Since the end strapping tape cannot be removed, it will cause the strapping tape to accumulate, resulting in tape jams and other phenomena. Summary of the invention

[0005] In view of the above problems, a box strapping automatic recycling and cutting device and recycling and cutting method with good use effect are provided.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A box strapping automatic recycling and cutting device comprises a recycling feeding mechanism, a recycling shearing mechanism, a terminal discharging mechanism, a power mechanism and auxiliary devices; the recycling feeding mechanism is responsible for continuously conveying the strapping tape to the recycling shearing mechanism, the recycling shearing mechanism is responsible for segmented shearing of the strapping tape, the terminal discharging mechanism is responsible for delivering the last segment of the strapping tape, the power mechanism is responsible for providing power to the recycling feeding mechanism and the terminal discharging mechanism, and the position sensor of the auxiliary device is used to detect whether the strapping tape enters the recycling feeding mechanism on the one hand, and to detect whether the strapping tape has been cut on the other hand.

[0008] Optionally, the recovery and feeding mechanism includes at least a clamping cylinder, an upper roller assembly and a lower roller; the clamping cylinder is fixedly mounted on a frame, the upper roller assembly of the recovery and feeding mechanism is mounted on the lower part of the push rod of the clamping cylinder, the lower roller of the recovery and feeding mechanism is fixedly mounted on the frame and driven to rotate by a motor, and the upper roller assembly is driven vertically by the clamping cylinder.

[0009] Optionally, the upper roller assembly at least includes a connecting bracket, a spring a, a spring b, an upper roller, an upper roller shaft, a bearing, left and right limit blocks, a limit plate, a roller rear bracket and a roller front bracket; the connecting bracket is connected to the clamping cylinder through a fixed connection, the connecting bracket is connected to the roller front bracket and the roller rear bracket through a fixing bolt, and the upper roller shaft is connected to the upper roller through a bearing; the upper roller shaft can move up and down in the middle small hole of the roller front bracket and the roller rear bracket under the drive of the upper roller; the main body of the spring a is located inside the roller front bracket, and the main body of the spring b is located inside the roller rear bracket. This structure can prevent the spring from slipping and swinging, and one end of the two springs is connected to the connecting bracket, and the other end thereof is connected to the roller shaft; the upper roller floats up and down according to the thickness change of the packing tape under the action of the spring; the roller front bracket is connected to the left and right limit blocks and the limit plate by bolts.

[0010] Optionally, the length of the spring will change with the thickness of the strapping tape, ensuring that the strapping tape and the hot-melt double-layer joint can pass through the recycling feeding mechanism smoothly to avoid the occurrence of tape jamming; the upper roller has a surface groove to ensure friction, so that the strapping tape passes through the recycling feeding mechanism without slipping, and a gap that the strapping tape cannot pass through is left between the left and right limit blocks and the upper roller to ensure that the strapping tape is prevented from being rolled into the roller during the recycling feeding process, causing the roller to be stuck, thereby avoiding recycling failure caused by equipment shutdown; the limit plate is in a closed state with the frame during the operation of the mechanism to prevent the strapping tape from swinging and deviating; under the action of the limit plate and the limitation of the limit block, the strapping tape will smoothly enter the recycling and cutting mechanism.

[0011] Optionally, the recycling and shearing mechanism at least includes a tape cutting cylinder, a cutting knife group and a guide seat, and the cutting knife group at least includes a buckle, a knife holder, an upper blade and a lower blade; the upper blade is fixed to the knife holder by bolts, the knife holder is fixedly connected to the tape cutting cylinder by the buckle, the guide seat is fixedly mounted on the frame, the knife holder moves up and down in the guide seat groove through the tape cutting cylinder, the upper guide groove of the guide seat and the knife holder are in clearance fit, the lower blade is fixedly mounted on one side of the guide seat, and the upper blade and the knife holder have the same outline size. The guide seat can ensure that the running path of the upper blade does not deviate, and the upper blade passes through the guide groove of the guide seat and interacts with the lower blade to shear the strapping tape; the strapping tape enters the recycling and shearing mechanism from the recycling feeding mechanism, and the strapping tape is cut into fixed-segment strips under the action of the upper and lower blades, which is convenient for subsequent recycling. The end discharging mechanism comprises a clamping pulley cylinder, an upper clamping pulley and a lower clamping pulley; the clamping pulley cylinder is connected to the upper clamping pulley of the end discharging mechanism through a bracket, and the lower clamping pulley is fixedly mounted on the frame.

[0012] Optionally, the upper tension wheel is disengaged from the lower roller when the position sensor detects the strapping tape; when the sensor detects that the strapping tape is empty, the cutting cylinder will no longer control the movement of the cutter and will be in a retracted state, and the upper tension wheel is pressed downward by the tension wheel cylinder, and the last section of the strapping tape will be sent out by the upper tension wheel and the lower tension wheel.

[0013] Optionally, the auxiliary device includes at least a position sensor and a synchronous belt; the position sensor is installed on a side of the frame close to the recovery feeding mechanism, and there is a notch in the middle of the position sensor for detecting the position information of the packing belt. The synchronous belt is used to connect the power mechanism and the lower roller of the recovery feeding mechanism and the lower tensioning pulley of the end discharging mechanism.

[0014] Optionally, the power mechanism includes at least a motor, which is fixedly mounted on a frame, and the motor synchronously drives the lower roller of the recovery feeding mechanism and the lower tensioning pulley of the end discharging mechanism to rotate through a synchronous belt of an auxiliary device; when recycling and feeding, the lower roller drives the upper roller of the recovery feeding mechanism to rotate through friction; the lower tensioning pulley drives the upper tensioning pulley of the end discharging mechanism to rotate through friction, thereby delivering the last section of the packaging tape.

[0015] Optionally, the position sensor detects the position information of the strapping tape, the compression cylinder of the recovery and feeding mechanism drives the upper roller assembly of the recovery and feeding mechanism to compress the strapping tape downward, the tape cutting cylinder of the recovery and shearing mechanism drives the cutter group to reciprocate, and the power mechanism motor starts to rotate; when the position sensor detects that the strapping tape is empty, the tape cutting cylinder will no longer control the movement of the cutter and is in a retracted state, the compression pulley cylinder of the end discharging mechanism drives the upper compression pulley of the end discharging mechanism to move downward, and the last section of the strapping tape will be delivered by the upper compression pulley and the lower compression pulley.

[0016] A box strapping automatic recycling and cutting method uses the box strapping automatic recycling and cutting device as described above, tightens the two ends of the strapping tape, and then uses an upper blade and a lower blade to cut it.

[0017] Optionally, by setting an elastic upper roller, the tension of the strapping belt is controlled, the elastic expansion and contraction of the strapping belt is achieved, the tension of the conveyed strapping belt is maintained, and strapping belts of different thicknesses are adjusted, so as to maintain the continuous operation of automatic recovery and cutting of the strapping belt.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention connects the spring and the upper roller, and the length of the spring changes with the thickness of the strapping tape. The strapping tape with uneven thickness can be adaptively recycled and cut, and the double-layer strapping tape at the strapping tape joint can also be recycled and cut.

[0020] 2. The present invention prevents the strapping belt from being rolled into the roller by the left and right limit blocks, and prevents the strapping belt from swinging away from the roller by the limit plate. Under the constraints of the left and right limit blocks and the limit plate, the strapping belt can smoothly enter the recovery and cutting mechanism.

[0021] 3. The present invention is provided with an end discharging mechanism, which can take out the end strapping tape, effectively preventing the strapping tape from getting stuck due to the strapping tape accumulation, and further improving the strapping tape recycling efficiency.

[0022] 4. The present invention can recycle strapping tapes of different thicknesses and whether the strapping tapes are bent. The internal mechanical structure can prevent the strapping tapes from remaining inside the device, ensure the efficient operation of the mechanism, and realize the automation and efficiency of strapping tape recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0024] Figure 1 It is a schematic diagram of the overall structure of a box strapping automatic recovery and cutting device of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the synchronous belt of the auxiliary device of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall structure of the upper roller assembly of the recycling feeding mechanism of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the spring b of the recycling feeding mechanism of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the recovery and shearing mechanism of the present invention;

[0029] Figure 6 It is a schematic diagram of the upper cutter assembly of the recycling shearing mechanism of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the terminal recovery device of the present invention;

[0031] In the figure, 1, clamping cylinder; 2, upper roller assembly; 3, lower roller; 4, belt cutting cylinder; 5, cutter group; 6, clamping pulley cylinder; 7, position sensor; 8, motor; 9, guide seat; 10, lower clamping roller; 11, frame; 12, synchronous belt; 21, connecting bracket; 221, spring a; 222, spring b; 23, upper roller; 24, upper roller shaft; 25, bearing; 26, left and right limit blocks; 27, limit plate; 28, roller rear bracket; 29, roller front bracket; 51, buckle; 52, knife holder; 53, upper blade; 54, lower blade; 61, clamping pulley cylinder; 62, bracket (62); 63, upper clamping pulley. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inside", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] A box strapping automatic recycling and cutting device includes a recycling feeding mechanism, which includes at least a clamping cylinder 1, an upper roller assembly 2 and a lower roller 3; the clamping cylinder 1 of the recycling feeding mechanism is fixedly mounted on a frame 11, the upper roller assembly 2 of the recycling feeding mechanism is mounted on the lower part of the push rod of the clamping cylinder 1, the lower roller 3 of the recycling feeding mechanism is fixedly mounted on the frame 11 and driven to rotate by a motor 8, the upper roller assembly 2 is driven vertically by the clamping cylinder 1, and a position sensor 7 is installed at the feed port of the recycling feeding mechanism.

[0036] During use, when the position sensor 7 detects the strapping tape, the compression cylinder 1 drives the upper roller assembly 2 to move downward, and the upper roller assembly 2 presses the strapping tape downward. Under the action of the spring, the upper roller 23 moves up and down according to the thickness change of the strapping tape to ensure that the pressure on the strapping tape is sufficient; at this time, the lower roller 3 starts to rotate under the drive of the motor, and the strapping tape is transported out of the recycling feeding mechanism under the rolling of the upper and lower rollers.

[0037] The upper roller assembly at least includes a connecting bracket 21, a spring a221, a spring b222, an upper roller 23, an upper roller shaft 24, a bearing 25, left and right limit blocks 26, a limit plate 27, a roller rear bracket 28 and a roller front bracket 29; the connecting bracket is connected to the clamping cylinder by a fixed connection, the connecting bracket is connected to the roller front bracket and the roller rear bracket by a fixing bolt, and the upper roller shaft is connected to the upper roller by a bearing; Figure 3 As shown, the upper roller shaft can move up and down in the middle small hole of the roller front bracket and the roller rear bracket under the drive of the upper roller; the spring a body is located inside the roller front bracket, and the spring b body is located inside the roller rear bracket. This structure can prevent the spring from slipping and swinging, and one end of the two springs is connected to the connecting bracket, and the other end is connected to the roller shaft; the upper roller floats up and down according to the thickness change of the packaging tape under the action of the spring; the roller front bracket is connected to the left and right limit blocks and limit plates by bolts.

[0038] The length of the spring will change with the thickness of the strapping tape, ensuring that the strapping tape and the hot-melt double-layer joint can pass through the recycling feeding mechanism smoothly to avoid the occurrence of tape jamming; the upper roller has a surface groove to ensure friction, so that the strapping tape passes through the recycling feeding mechanism without slipping, and a gap that the strapping tape cannot pass through is left between the left and right limit blocks and the upper roller to ensure that the strapping tape is prevented from being rolled into the roller during the recycling feeding process, causing the roller to be stuck, thereby avoiding recycling failure caused by equipment shutdown; the limit plate is in a closed state with the frame during the operation of the mechanism to prevent the strapping tape from swinging and deviating; under the action of the limit plate and the limitation of the limit block, the strapping tape will smoothly enter the recycling and cutting mechanism.

[0039] The recycling shearing mechanism at least includes a belt cutting cylinder 4, a cutting knife group 5 and a guide seat 9. The cutting knife group 5 at least includes a buckle 51, a knife holder 52, an upper blade 53 and a lower blade 54. The upper blade 53 is fixed to the knife holder 52 by bolts. The knife holder 52 is fixedly connected to the belt cutting cylinder 4 by the buckle 51. The guide seat 9 is fixedly mounted on the frame 11. The knife holder 52 moves up and down in the guide groove of the guide seat 9 through the belt cutting cylinder 4. The guide groove on the upper part of the guide seat 9 and the knife holder 52 are in clearance fit. The lower blade 54 is fixedly mounted on one side of the inner part of the guide seat 9. The upper blade 53 and the knife holder 52 have the same outline dimensions.

[0040] During use, when the position sensor 7 detects the strapping tape, the tape cutting cylinder 4 drives the upper blade 53 to reciprocate up and down, and the upper blade 53 passes through the guide groove of the guide seat 9 and interacts with the lower blade 54 to cut the strapping tape in sections, which is convenient for subsequent recycling. The guide seat 9 can ensure that the running path of the upper blade 53 does not deviate, ensuring the accuracy of cutting. The upper blade passes through the guide groove of the guide seat and interacts with the lower blade to cut the strapping tape; the strapping tape enters the recycling and cutting mechanism from the recycling feeding mechanism, and the strapping tape is cut into fixed-section strips under the action of the upper and lower blades, which is convenient for subsequent recycling.

[0041] The end discharging mechanism at least includes a clamping pulley cylinder 61, an upper clamping pulley 63, and a lower clamping pulley 10; the clamping pulley cylinder 61 of the end discharging mechanism is connected to the upper clamping pulley 63 of the end discharging mechanism through a bracket 62, and the lower clamping pulley 10 is fixedly mounted on the frame 11.

[0042] During use, when the position sensor 7 detects that the strapping tape is empty, the tape cutting cylinder 4 will no longer control the movement of the upper cutter 53 and will be in a retracted state, and the clamping pulley cylinder 61 of the end discharging mechanism will drive the upper clamping pulley 62 of the end discharging mechanism to move downward, and the last section of the strapping tape will be sent out by the upper clamping pulley 62 and the lower clamping pulley 63. Since the upper and lower rollers of the recycling feeding mechanism cannot send out the last section of the strapping tape, it will cause the strapping tape to accumulate for a long time, and the end discharging mechanism can send out the last section of the strapping tape to avoid such a phenomenon.

[0043] The present invention also has the advantage of combining the use of a recycling feeding mechanism and an end discharging mechanism: when in use, one side of the strapping tape is clamped by the upper roller assembly 2 and the lower roller 3, and the other side is clamped by the upper tensioning pulley 63 and the lower tensioning pulley 10, which can ensure (1) the shearing effect, especially avoiding the problem that the existing equipment cannot cut the strapping tape when the strapping tape to be recycled is greatly bent; (2) combined with the action of spring a221 and spring b222, it is ensured that the strapping tape receives sufficient tension in the early stage, which significantly reduces the problem that the equipment is easily stuck during the recycling process due to the double-layer or multi-layer strapping tape at the joint, and the problem that the strapping tape is easily caught in the tensioning wheel inside the equipment after shearing because the strapping tape to be recycled is partially bent and not straightened in the early stage.

[0044] The present invention also includes a power mechanism and auxiliary devices; the recycling feeding mechanism is responsible for continuously conveying the strapping tape to the recycling and shearing mechanism, the recycling and shearing mechanism is responsible for segmented shearing of the strapping tape, the end discharging mechanism is responsible for delivering the last segment of the strapping tape, the power mechanism is responsible for providing power to the recycling feeding mechanism and the end discharging mechanism, and the position sensor of the auxiliary device is used to detect whether the strapping tape enters the recycling feeding mechanism on the one hand, and to detect whether the strapping tape has been cut on the other hand.

[0045] The auxiliary device includes at least a position sensor 7 and a synchronous belt 12; the position sensor is installed on one side of the frame close to the recycling feeding mechanism, and there is a notch in the middle of the position sensor for detecting the position information of the packing belt. The synchronous belt is used to connect the power mechanism and the lower roller of the recycling feeding mechanism and the lower tensioning pulley of the end discharging mechanism.

[0046] The power mechanism at least includes a motor 8, which is fixedly mounted on the frame. The motor synchronously drives the lower roller of the recovery feeding mechanism and the lower tensioning pulley of the terminal discharging mechanism to rotate through the synchronous belt of the auxiliary device; when recycling and feeding, the lower roller drives the upper roller of the recovery feeding mechanism to rotate through friction; the lower tensioning pulley drives the upper tensioning pulley of the terminal discharging mechanism to rotate through friction, so as to deliver the last section of the packaging tape.

[0047] The position sensor detects the position information of the strapping tape, the compression cylinder of the recycling and feeding mechanism drives the upper roller assembly of the recycling and feeding mechanism to compress the strapping tape downward, the tape cutting cylinder of the recycling and shearing mechanism drives the cutter group to reciprocate, and the power mechanism motor starts to rotate; when the position sensor detects that the strapping tape is emptied, the tape cutting cylinder will no longer control the movement of the cutter and is in a retracted state, the compression pulley cylinder of the end discharging mechanism drives the upper compression pulley of the end discharging mechanism to move downward, and the last section of the strapping tape will be delivered by the upper compression pulley and the lower compression pulley.

[0048] A box strapping automatic recycling and cutting method uses the box strapping automatic recycling and cutting device as described above, by tightening the two ends of the strapping tape, and then using the upper blade and the lower blade to cut. The advantage of this solution is that the strapping tape is used after all, and when recycling, some areas of the strapping tape are damaged or bent or the joints are double-layered or more. By stretching it first, the disadvantages of being involved in the internal compression wheel of the equipment and not being cut in place can be reduced.

[0049] Optionally, by setting an elastic upper roller, the tension of the strapping belt is controlled, the elastic expansion and contraction of the strapping belt is realized, the tension of the conveyed strapping belt is maintained, and the strapping belt of different thicknesses is adjusted, and the continuous operation of the automatic recovery and cutting of the strapping belt is maintained. The elastic upper roller can improve the adaptability to strapping belts of different thicknesses, improve the stretching effect, and reduce equipment failures. At the same time, the elastic compression of the strapping belt is realized to ensure the smooth transmission process of the strapping belt, and the flattening effect of the bent strapping belt can be achieved, further reducing the equipment failure rate.

Claims

1. A box strapping automatic recycling and cutting device, characterized in that: It includes a recycling feeding mechanism, a recycling shearing mechanism, an end discharging mechanism, a power mechanism and auxiliary devices; The recycling and feeding mechanism comprises a pressing cylinder (1), an upper roller assembly (2) and a lower roller (3); the recycling and shearing mechanism comprises a cutting cylinder (4), a cutting knife assembly (5) and a guide seat (9); The end discharge mechanism comprises a clamping pulley cylinder (61), an upper clamping pulley (63), and a lower clamping pulley (10); the power mechanism comprises a motor (8); The auxiliary device comprises a position sensor (7), a frame (11) and a synchronous belt (12); The recycling feeding mechanism is responsible for continuously conveying the strapping tape to the recycling and cutting mechanism, the recycling and cutting mechanism is responsible for segmented cutting of the strapping tape, the terminal discharging mechanism is responsible for delivering the last segment of the strapping tape, the power mechanism is responsible for providing power to the recycling feeding mechanism and the terminal discharging mechanism, and the position sensor (7) of the auxiliary device is used to detect whether the strapping tape has entered the recycling feeding mechanism on the one hand, and to detect whether the strapping tape has been cut on the other hand.

2. According to claim 1, the automatic recovery and cutting device for box strapping is characterized in that: The clamping cylinder (1) of the recycling feeding mechanism is fixedly mounted on the frame (11), the upper roller assembly (2) of the recycling feeding mechanism is mounted on the lower part of the push rod of the clamping cylinder (1), the lower roller (3) of the recycling feeding mechanism is fixedly mounted on the frame (11) and driven to rotate by the motor (8), and the upper roller assembly (2) is driven to move vertically by the clamping cylinder (1).

3. According to claim 1, the automatic recovery and cutting device for box strapping is characterized in that: The upper roller assembly (2) comprises a connecting bracket (21), a spring a (221), a spring b (222), an upper roller (23), an upper roller shaft (24), a bearing (25), left and right limit blocks (26), a limit plate (27), a roller rear bracket (28) and a roller front bracket (29); the connecting bracket (21) is connected to the pressing cylinder (1) by a fixed connection, the connecting bracket (21) is connected to the roller front bracket (29) and the roller rear bracket (28) by a fixing bolt, and the upper roller shaft (24) is connected to the upper roller (23) by a bearing (25); the upper roller shaft (24) can move up and down in the middle small holes of the roller front bracket (29) and the roller rear bracket (28) under the drive of the upper roller (23); the spring a (2 21) The main body is located inside the roller front bracket (29), and the main body of the spring b (222) is located inside the roller rear bracket (28). This structure can prevent the springs from slipping and swinging. One end of the two springs is connected to the connecting bracket (21), and the other end is connected to the roller shaft (24); the upper roller (23) floats up and down according to the thickness change of the strapping tape under the action of the spring; the roller front bracket (29) is connected to the left and right limit blocks (26) and the limit plate (27) by bolts; a gap smaller than the thickness of the strapping tape is left between the left and right limit blocks (26) and the outer circle of the upper roller (23) to ensure the smooth operation of the upper roller and prevent the strapping tape from being rolled into the upper roller; the limit plate (27) is in a closed state with the frame (11) during the operation of the mechanism to prevent the strapping tape from swinging away from the roller.

4. According to claim 1, the box strapping automatic recovery and cutting device is characterized in that: The clamping cylinder (1) of the recycling feeding mechanism drives the upper roller assembly (2) of the recycling feeding mechanism to move up and down, that is, when the position sensor (7) of the auxiliary device detects that the strapping tape exists inside the recycling feeding mechanism, the clamping cylinder (1) pushes the upper roller assembly (2) to move downward; when the position sensor (7) of the auxiliary device does not detect that the strapping tape exists inside the recycling feeding mechanism, the clamping cylinder (1) pushes the upper roller assembly (2) to move upward.

5. According to claim 1, the automatic recovery and cutting device for box strapping is characterized in that: The cutting knife group (5) of the recycling shearing mechanism comprises a buckle (51), a knife frame (52), an upper blade (53), and a lower blade (54); the upper blade (53) is fixed to the knife frame (52) by bolts, the knife frame (52) is fixedly connected to the tape cutting cylinder (4) by the buckle (51), the guide seat (9) is fixedly mounted on the frame (11), the knife frame (52) moves up and down in the guide groove of the guide seat (9) through the tape cutting cylinder (4), the guide groove on the upper part of the guide seat (9) and the knife frame (52) are in clearance fit, the lower blade (54) is fixedly mounted on one side of the inner part of the guide seat (9), the upper blade (53) and the knife frame (52) have the same outline size, and the upper blade (53) passes through the guide groove of the guide seat (9) and interacts with the lower blade (54) to shear the strapping tape.

6. According to claim 1, the box strapping automatic recovery and cutting device is characterized by: The clamping belt wheel cylinder (61) of the end discharging mechanism is connected to the upper clamping belt wheel (63) of the end discharging mechanism via a bracket (62), and the lower clamping belt wheel (10) is fixedly mounted on the frame (11).

7. According to claim 1, the automatic recovery and cutting device for box strapping is characterized in that: The motor (8) of the power mechanism is fixedly mounted on the frame (11), and the motor (8) synchronously drives the lower roller (3) of the recovery feeding mechanism and the lower clamping pulley (10) of the terminal discharging mechanism to rotate through the synchronous belt (12) of the auxiliary device; when recycling and feeding, the lower roller (3) drives the upper roller (23) of the recovery feeding mechanism to rotate through friction; and the lower clamping pulley (10) drives the upper clamping pulley (33) of the terminal discharging mechanism to rotate through friction.

8. According to claim 1, the box strapping automatic recovery and cutting device is characterized by: The position sensor (7) of the auxiliary device is installed on one side of the frame (11) close to the recycling feeding mechanism, and there is a notch in the middle of the position sensor (7). When the position sensor detects the strapping tape, the compression cylinder (1) of the recycling feeding mechanism drives the upper roller assembly (2) of the recycling feeding mechanism to compress the strapping tape downward, and the tape cutting cylinder (4) of the recycling shearing mechanism drives the cutting knife group (5) to reciprocate, and the power mechanism motor (8) starts to rotate; when the position sensor (7) detects that the strapping tape is emptied, the compression pulley cylinder (61) of the end discharging mechanism drives the upper compression pulley (63) of the end discharging mechanism to move downward, so as to peel off the last section of the strapping tape.

9. A method for automatically recycling and cutting box strapping tape, characterized in that: The box body strapping automatic recovery and cutting device as claimed in any one of claims 1 to 8 is used to tighten the two ends of the strapping tape and then use the upper blade and the lower blade to cut it.

10. The method for automatically recycling and cutting box strapping tape according to claim 1, characterized in that: By setting an elastic upper roller, the tension of the strapping belt is controlled, the elastic expansion and contraction of the strapping belt is realized, the tension of the conveyed strapping belt is maintained, and strapping belts of different thicknesses are adjusted, so as to maintain the continuous operation of the automatic recovery and cutting of the strapping belt.

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