Banana bagging device based on bridle link mechanism and operation method thereof

Abstract

The invention discloses a bananas bagging device based on a strap link mechanism and an operation method thereof, and the bananas bagging device comprises a supporting assembly, and a strap winding and unwinding mechanism, a bag opening mechanism, the strap link mechanism and a heating and shearing mechanism which are arranged on the supporting assembly, the supporting assembly comprises a shell, a supporting rod arranged at the bottom of the shell and a first power source used for driving the supporting rod to move up and down, the bag opening mechanism is arranged at the top of the front end of the supporting mechanism, the strap winding and unwinding mechanism is arranged on one side of the shell, and the strap link mechanism is arranged in the shell. The heating and shearing mechanism is arranged in the shell and located beside the bridle link mechanism. By means of the linkage design of the bridle link mechanism and the heating and shearing mechanism, hot melting is conducted on a bagging bag opening from all directions, so that the heating and sealing effect is improved, in addition, the bag opening is shrunk in a wrapping mode through the bag opening mechanism, and the bag sealing effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of fruit bagging equipment, in particular to a banana bagging device based on a belt link mechanism and an operating method thereof. Background Art

[0002] Currently, the most commonly used banana bagging method in the market is mostly manual. This traditional packaging method is not only inefficient but also labor-intensive. Due to labor variability, packaging quality can vary, impacting market sales and product competitiveness. Therefore, there is an urgent need for efficient, stable, and quality-assured banana bagging equipment. Hot-melt bagging technology is widely used in the fruit packaging industry due to its excellent sealing and moisture- and dust-proof properties. By heating and sealing the plastic bag while it is in a hot-melt state, it effectively extends the shelf life and provides a solution for banana packaging. Strapping mechanisms offer the advantages of simple operation, strong adaptability, and high efficiency, enabling automated banana packaging and reducing labor costs. However, existing technologies still have shortcomings. For example, Patent Publication No. CN110800529A proposes a banana bagging device that heats and fuses the bag opening. This device uses multiple heating plates to heat and fuse the bag opening, but suffers from problems such as loose bag closure, difficulty in controlling the heating temperature, and uneven heat distribution across the bag. These issues result in poor sealing and fail to meet the sealing and stability requirements for banana packaging. Therefore, there is an urgent need for a new banana bagging equipment that can solve the above problems to achieve efficient, stable and high-quality automated packaging. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a banana bagging device based on a drawstring link mechanism. Through the linkage design of the drawstring link mechanism and the heating and shearing mechanism, the bag opening is hot-melted from all directions, thereby improving the heating and sealing effect. In addition, the bag opening is shrunk by wrapping the bag opening, and the bag sealing effect is better.

[0004] Another object of the present invention is to provide an operating method of a banana bagging device based on a drawstring link mechanism.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A banana bagging device based on a strap link mechanism includes a support assembly and a strap winding and unwinding mechanism, a bag holding mechanism, a strap link mechanism and a heating and shearing mechanism arranged on the support assembly. The support assembly includes an outer shell, a support rod arranged at the bottom of the outer shell and a first power source for driving the support rod to move up and down. The bag holding mechanism is arranged at the front end top of the support mechanism, and is used to suck and fix the fruit bag, and then open the fruit bag outward or retract the fruit bag inward. The strap winding and unwinding mechanism is arranged on one side of the outer shell, and is used to place the strap and control the winding or unwinding of the strap. The strap link mechanism is arranged inside the outer shell, and is used to wrap the strap transferred from the strap winding and unwinding mechanism around the fruit bag and complete the bundling action. The heating and shearing mechanism is arranged inside the outer shell and is located next to the strap link mechanism, and is used to cut and fuse the strap after the bundling action is completed.

[0007] Furthermore, a mounting position for installing a strap winding and unwinding mechanism is provided on one side of the shell, and the strap winding and unwinding mechanism includes a reel, a strap and a second power source. The reel is rotatably provided on the mounting position, and the strap is provided on the outer periphery of the reel. A through-hole for the strap to pass through is provided on one side of the shell and next to the mounting position. The strap is led to the strap link mechanism inside the shell through the through-hole, and the reel is driven to rotate by the second power source, thereby driving the strap to be wound up or unwound.

[0008] Furthermore, the bag-holding mechanism includes a bag-holding shell, a driving gear, a driven gear, a first driving rod, a second driving rod, a first auxiliary connecting rod, a second auxiliary connecting rod, a vacuum suction cup and a third power source. The bag-holding shell is arranged at the front end top of the shell, the driving gear and the driven gear are meshed and symmetrically installed on the left and right sides of the inside of the bag-holding shell, one end of the first driving rod is connected to the driving gear, the other end of the first driving rod is hinged to one end of the first auxiliary connecting rod, one end of the second driving rod is connected to the driven gear, and the other end of the second driving rod is hinged to the second auxiliary connecting rod. One end of the first auxiliary link is hinged, the other end of the first auxiliary link is hinged with the other end of the second auxiliary link, and the inner sides of the first driving rod, the second driving rod, the first auxiliary link and the second auxiliary link are respectively provided with vacuum suction cups for sucking and fixing the fruit bag. After the vacuum suction cup sucks and fixes the fruit bag, the third power source drives the driving gear and drives the driven gear to rotate, thereby driving the opening and closing of the quadrilateral mechanism composed of the first driving rod, the second driving rod, the first auxiliary link and the second auxiliary link, thereby expanding the fruit bag outward or retracting the fruit bag inward, thereby realizing the bagging or sealing operation of the fruit bag.

[0009] Furthermore, the third power source is a DC encoding motor that can output a torque signal. Through motor encoding feedback, the length of the belt delivered by the driving gear during each operation remains consistent, and when the DC encoding motor reaches a predetermined position, the belt travels around the annular guide groove of the belt link mechanism for one circle to reach the target position.

[0010] Furthermore, the strap link mechanism includes a strap shell, a limit push rod, a limit movable plate, a driving rod, a strap guide rail, a strap baffle, two support guide rods, a baffle, a strap guide boss, a pressure block, a driving wheel, a driven wheel, a strap guide plate, a fourth power source, a fifth power source, a sixth power source and a seventh power source. The strap shell is arranged inside the shell and is located below the bag-supporting mechanism. A limit push rod is provided through the strap shell, and the limit movable plate is arranged on the top of the limit push rod. The limit push rod is driven by the fourth power source to push the limit movable plate up and down, and the limit movable plate is limited to three preset limit positions of upper, middle and lower heights respectively by the limit push rod. There are two driving rods, which are symmetrically arranged on the left and right sides of the front end of the strap shell. The two driving rods are respectively connected to the two driving rods, and the belt guide rails are in a U-shaped structure. The fifth power source drives the two driving rods to drive the two belt guide rails to open or close, and when in a closed state, the two belt guide rails surround the outer circumference of the fruit bag. There are two belt retaining rings, which are hinged to the left and right sides of the front end of the limiting movable plate, and the two belt retaining rings are movably connected to the two driving rods respectively. The two belt retaining rings can move up and down along the two driving rods under the drive of the limiting movable plate, and the shape of the belt retaining ring is adapted to the shape of the belt guide rail, and the limiting push rod pushes the limiting movable plate to move downward, so that the belt retaining ring cooperates with the belt guide rail to form a belt that can be used for binding. Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The driving wheel and the driven wheel are meshed and arranged on the belt shell, and are located next to the through-hole of the shell. The belt guide plate is arranged on the belt shell, one end of which is located next to the driving wheel and tangent to the driving wheel, and the other end of which is located behind the pressure block. When the belt guide boss falls to the preset lowest limit position with the limiting movable plate, one end of the belt guide boss is located next to the belt guide plate, and the other end extends to the entrance of the annular guide groove formed by the belt retaining ring and the belt guide rail, and is tangent to the entrance of the annular guide groove. When the belt guide boss rises to the preset middle limit position with the limiting movable plate, the belt guide boss synchronously rises to the top of the belt,The seventh power source drives the driving wheel and the driven wheel to rotate, and then the starting end of the belt transmitted by the belt winding and unwinding mechanism is transmitted through the gap between the driving wheel and the driven wheel, the belt guide plate, and the belt guide boss to the entrance of the annular guide groove. Then, the starting end of the belt makes a circle along the annular guide groove and merges with the end of the belt at the entrance. Then, the starting end of the belt is pressed and fixed to the baffle by the pressure block.

[0011] Furthermore, hinge holes for connecting corresponding strap retaining rings are respectively provided on the left and right sides of the front end of the limiting movable plate, and two slide rails are provided on the driving rod along its height direction, and an extension portion for connecting with the driving rod and the limiting movable plate is provided on one side of the strap retaining ring, and a mounting hole is provided on the extension portion, and a slide groove for matching with the two slide rails is provided on the inner wall of the mounting hole, so that the strap retaining ring can move up and down along the driving rod through the cooperation of the slide groove and the slide rail, and a conical structure for hinged connection with the limiting movable plate is provided on the outer wall of the extension portion, and the conical structure is connected with the conical groove on the inner wall of the hinge hole of the limiting movable plate with clearance matching.

[0012] Furthermore, the surfaces of the driving wheel and the driven wheel are both provided with a silicone layer for increasing friction, and the gap between the driving wheel and the driven wheel is smaller than the thickness of the belt, and the discharge and tightening of the belt are achieved by the forward and reverse rotation of the driving wheel.

[0013] Furthermore, the heating and shearing mechanism includes a heating push rod, a heating block and an eighth power source. The heating push rod is arranged inside the outer shell and is located at the top of the strap shell of the strap winding mechanism. The heating block is arranged at the front end of the heating push rod and is located behind the strap guide boss of the strap winding mechanism. The heating push rod is driven by the eighth power source to drive the heating block to move toward the baffle of the strap winding mechanism, thereby pressing and fixing the end and starting ends of the strap on the baffle, and then cutting and fusing the starting and end ends of the strap by the heating block.

[0014] Furthermore, the front end surface of the heating block is provided with a sharp knife structure for cutting the band.

[0015] Another object of the present invention is achieved through the following technical solutions:

[0016] A method for operating a banana bagging device based on a belt link mechanism comprises the following steps:

[0017] In the initial state, the limit movable plate of the belt link mechanism is at the preset lowest limit position, the belt guide rail and the belt retaining ring of the belt link mechanism are respectively in the open state, and the starting end of the belt passes through the through hole and is located between the driving wheel and the driven wheel of the belt link mechanism;

[0018] Insert the fruit bag upward from the center of the bag-supporting mechanism, and the vacuum suction cup of the bag-supporting mechanism sucks and fixes the fruit bag, and then stretches the fruit bag outward to start the bagging operation;

[0019] The support rod is driven upward by a first power source until the bag-supporting mechanism exceeds the height of the banana bunch, and then the bag is closed inward by the bag-supporting mechanism. Then, the drawstring guide rail and the drawstring retaining ring are controlled to close and surround the outer circumference of the fruit bag. The drawstring guide rail and the drawstring retaining ring cooperate to form an annular guide groove that can guide the movement path of the drawstring;

[0020] The belt is loosened by the belt winding and unwinding mechanism, and then the starting end of the belt is passed through the gap between the driving wheel and the driven wheel, the belt guide plate of the belt link mechanism, and the belt guide boss of the belt link mechanism to the entrance of the annular guide groove through the belt link mechanism. Then, the starting end of the belt goes around the annular guide groove and merges with the end of the belt at the entrance. Then, the limiting push rod of the belt link mechanism raises the limiting movable plate, the belt guide boss and the belt retaining ring to the preset middle limit position, and then the starting end of the belt is pressed and fixed on the baffle of the belt link mechanism by the pressure block of the belt link mechanism;

[0021] The band is tightened by the band winding mechanism, and then the end and starting end of the band are pressed and fixed on the baffle by the heating and shearing mechanism, thereby cutting off and fusing the starting and ending ends of the band;

[0022] The limit push rod pushes the limit movable plate and drives the strap retaining ring to rise to the preset upper limit. At this time, the strap is tightened on the fruit bag to complete the bundling action;

[0023] All the above mechanisms return to their initial states, completing one bagging operation.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] The present invention adopts an innovative heat-bonding tape sealing method.

[0026] 1. The bagging device of the present invention uses a drawstring link to heat-melt the bag opening in all directions, significantly improving the quality and reliability of heat sealing. The tension of the drawstring can be automatically adjusted according to the different sizes of bananas to ensure the stability and safety of the package. The bag opening size can be adjusted according to the different sizes of bananas through the bag-supporting mechanism, and the bag opening can be shrunk by clamping, thereby improving the condensation effect of the bag opening.

[0027] 2. The bagging device of the present invention improves the control accuracy of the device over the belt conveying process by adopting a DC encoder motor combined with torque feedback, thereby completing the condensation of the bag opening and realizing automated bagging.

[0028] In summary, the bagging device of the present invention greatly improves the sealing quality, reliability and production efficiency of banana packaging through the strap winding and unwinding mechanism, the bag supporting mechanism, the strap link mechanism and the heating and shearing mechanism, and has significant practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the banana bagging device.

[0030] Figure 2 It is a structural diagram of the bag-supporting mechanism.

[0031] Figure 3 It is a structural diagram of the belt link mechanism in a closed state.

[0032] Figure 4 This is a structural schematic diagram of the limit movable plate of the belt link mechanism being at the lowest limit position.

[0033] Figure 5 This is a structural diagram of the limit movable plate of the belt link mechanism in the middle limit position.

[0034] Figure 6 This is a structural schematic diagram of the limit movable plate of the belt link mechanism at the highest limit position.

[0035] Figure 7 This is a structural diagram of the belt going around the annular guide groove of the belt link mechanism to reach the target position.

[0036] Figure 8 It is a structural diagram of the belt retaining ring.

[0037] Figure 9 It is a structural diagram of the limiting movable plate.

[0038] Figure 10 Schematic diagram of the structure of the heating shearing mechanism cutting and fusing the strap. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] Example 1:

[0041] like Figure 1As shown, this embodiment provides a banana bagging device based on a strap link mechanism, including a support component and a strap winding and unwinding mechanism, a bag-holding mechanism, a strap link mechanism and a heating and shearing mechanism arranged on the support component. The support component includes a shell 101, a support rod 102 arranged at the bottom of the shell 101 and a first power source for driving the support rod 102 to move up and down. The bag-holding mechanism is arranged at the front end top of the support mechanism, and is used to suck and fix the fruit bag 6, and then open the fruit bag outward or retract the fruit bag inward. The strap winding and unwinding mechanism is arranged on one side of the shell 101, and is used to place the strap 202 and control the winding or unwinding of the strap 202. The strap link mechanism is arranged inside the shell 101, and is used to wrap the strap 202 transferred by the strap winding and unwinding mechanism around the fruit bag and complete the bundling action. The heating and shearing mechanism is arranged inside the shell 101 and is located next to the strap link mechanism, and is used to cut and fuse the strap 202 after the bundling action is completed.

[0042] One side of the shell 101 is provided with a mounting position 104 for installing a strap winding and unwinding mechanism. The strap winding and unwinding mechanism includes a reel 201, a strap 202 and a second power source. The reel 201 is rotatably set on the mounting position 104, and the strap 202 is set on the outer periphery of the reel 201. A through hole 103 for the strap 202 to pass through is provided on one side of the shell 101 and next to the mounting position 104. The strap 202 is led to the strap link mechanism inside the shell 101 through the through hole 103. The reel 201 is driven to rotate by the second power source, thereby driving the strap 202 to be wound up or unwound.

[0043] like Figure 2As shown, the bag-holding mechanism includes a bag-holding housing 301, a driving gear 302, a driven gear 303, a first driving rod 304, a second driving rod 305, a first auxiliary connecting rod 306, a second auxiliary connecting rod 307, a vacuum suction cup 308 and a third power source (not shown in the figure). The bag-holding housing 301 is arranged at the front end top of the housing 101, the driving gear 302 and the driven gear 303 are meshed, and are symmetrically installed on the left and right sides of the bag-holding housing 301 through a rotating shaft. One end of the first driving rod 304 is connected to the driving gear 302, and the other end of the first driving rod 304 is hinged to one end of the first auxiliary connecting rod 306. One end of the second driving rod 305 is connected to the driven gear 303. The other end is hinged to one end of the second auxiliary link 307, and the other end of the first auxiliary link 306 is hinged to the other end of the second auxiliary link 307. The inner sides of the first driving rod 304, the second driving rod 305, the first auxiliary link 306 and the second auxiliary link 307 are respectively provided with vacuum suction cups 308 for sucking and fixing the fruit bags. After the vacuum suction cups 308 suck and fix the fruit bags, the third power source drives the driving gear 302 and drives the driven gear 303 to rotate, thereby driving the opening and closing of the quadrilateral mechanism composed of the first driving rod 304, the second driving rod 305, the first auxiliary link 306 and the second auxiliary link 307, thereby stretching the fruit bags outward or retracting the fruit bags inward to realize the bagging or sealing operations of the fruit bags.

[0044] In this embodiment, the third power source is a DC encoding motor that can output a torque signal. Through motor encoding feedback, the length of the belt 202 transported by the driving gear 302 during each operation remains consistent, and when the DC encoding motor reaches a predetermined position, the belt 202 travels around the annular guide groove of the belt link mechanism for one circle to reach the target position.

[0045] like Figures 3 to 7As shown, the strap link mechanism includes a strap shell 401, a limiting push rod 402, a limiting movable plate 403, a driving rod 404, a strap guide rail 405, a strap retaining ring 406, two supporting guide rods 407, a baffle 408, a strap guide boss 409, a pressure block 410, a driving wheel 411, a driven wheel 412, a strap guide plate 413, a fourth power source, a fifth power source, a sixth power source and a seventh power source. The strap shell 401 is arranged inside the shell 101 and is located below the bag-supporting mechanism. A limiting push rod 402 is provided through the strap shell 401, and a limiting movable plate 403 is provided on the top of the limiting push rod 402. The limiting push rod 402 is driven by the fourth power source, and then the limiting movable plate 403 is pushed up and down. The limiting push rod 402 limits the limiting movable plate 403 to three preset limits at different heights: upper, middle and lower. There are two driving rods 404, which are symmetrically arranged on the left and right sides of the front end of the belt shell 401. Each driving rod 404 is equipped with a fifth power source to drive its rotation. There are two belt guide rails 405, which are respectively connected to the two driving rods 404, and the belt guide rails 405 are U-shaped. The fifth power source drives the two driving rods to drive the two belt guide rails 405 to open or close, and when in the closed state, the two belt guide rails 405 surround the outer circumference of the fruit bag. There are two belt retaining rings 406, which are respectively hinged to the left and right sides of the front end of the limiting movable plate 403, and the two belt retaining rings 406 are respectively connected to the two The two support guide rods 407 are symmetrically arranged on the left and right sides of the belt shell 401 and are located behind the limit push rod 402. The two support guide rods 407 extend upward and pass through the limit movable plate 403 and the bag supporting shell 301 of the bag supporting mechanism in turn. The support guide rods 407 control the up and down movement of the limit movable plate 403 The guide is performed. A downwardly extending baffle 408 and a belt guide boss 409 are respectively formed on the bottom surface of the limit movable plate 403. The downward extending length of the baffle 408 is greater than the downward extending length of the belt guide boss 409. A baffle groove 4011 matching the baffle 408 is provided at the front end of the belt shell 401 and is located between the two driving rods. When the baffle 408 moves downward to the preset lowest limit as the limit movable plate 403 moves, it is inserted into the baffle groove 4011. The pressure block 410 is movably provided on the belt shell 401 and is located next to the outlet 416 of the annular guide groove and at the rear of the baffle groove 4011. The pressure block 410 is driven by the sixth power source to move forward and fit on the baffle 408 that falls into the baffle groove 4011.The driving wheel 411 and the driven wheel 412 are meshed and arranged on the belt shell 401, and are located next to the through hole 103 of the shell 101. The belt guide plate 413 is arranged on the belt shell 401, one end of which is located next to the driving wheel 411 and tangent to the driving wheel, and the other end is located behind the pressure block 410. When the belt guide boss 409 falls to the preset lowest limit with the limiting movable plate 403, one end of it is located next to the belt guide plate 413, and the other end extends to the entrance 415 of the annular guide groove formed by the belt retaining ring 406 and the belt guide rail 405, and is tangent to the entrance of the annular guide groove. The belt guide boss 409 falls to the preset lowest limit with the limiting movable plate 403 When the movable plate 403 rises to the preset middle limit, the belt guide boss 409 rises synchronously to the top of the belt 202, and the seventh power source drives the driving wheel 411 and the driven wheel 412 to rotate, thereby passing the starting end of the belt 202 transmitted by the belt winding mechanism through the gap between the driving wheel 411 and the driven wheel 412, the belt guide plate 413, and the belt guide boss 409 to the entrance of the annular guide groove. Then, the starting end of the belt 202 makes a circle along the annular guide groove and merges with the end of the belt 202 at the entrance. Then, the starting end of the belt 202 is pressed and fixed on the baffle 408 by the pressing block 410.

[0046] like Figures 8 and 9 As shown, the left and right sides of the front end of the limiting movable plate 403 are respectively provided with hinge holes 4031 for connecting the corresponding strap retaining ring 406, and two slide rails 4041 are provided on the driving rod 404 along its height direction. An extension part 4061 for connecting with the driving rod and the limiting movable plate 403 is provided on one side of the strap retaining ring 406, and a mounting hole 4062 is provided at the center of the extension part. A slide groove 4063 for matching with the two slide rails 4041 is provided on the inner wall of the mounting hole. The slide groove and the slide rail 4041 cooperate to enable the strap retaining ring 406 to move up and down along the driving rod, and a frustum structure 4064 for being hinged to the limiting movable plate 403 is provided on the outer wall of the extension part. The frustum structure is connected with the frustum groove on the inner wall of the hinge hole 4031 of the limiting movable plate 403 by clearance matching.

[0047] The surfaces of the driving wheel 411 and the driven wheel 412 are both provided with a silicone layer for increasing friction, and the gap between the driving wheel 411 and the driven wheel 412 is smaller than the thickness of the belt 202, with a spacing of about 0.2 mm. The discharge and tightening of the belt 202 are achieved by the forward and reverse rotation of the driving wheel 411.

[0048] like Figure 10As shown, the heating and shearing mechanism includes a heating push rod 501, a heating block 502 and an eighth power source. The heating push rod 501 is arranged inside the outer shell 101 and is located at the top of the strap shell 401 of the strap winding mechanism. The heating block 502 is arranged at the front end of the heating push rod 501 and is located behind the strap guide boss 409 of the strap winding mechanism. The front end surface of the heating block 502 is provided with a sharp knife structure for cutting the strap 202. The heating push rod 501 is driven by the eighth power source to drive the heating block 502 to move toward the baffle 408 of the strap winding mechanism, thereby pressing and fixing the end and starting ends of the strap 202 on the baffle 408, and the starting end and end of the strap 202 are cut off and fused by the heating block 502.

[0049] Example 2:

[0050] This embodiment provides an operating method of a banana bagging device based on a belt link mechanism, comprising the following steps:

[0051] S1. In the initial state, the limit movable plate is at the preset lowest limit position, the belt guide rail and the belt retaining ring are respectively in the open state, and the starting end of the belt passes through the through hole and is located between the driving wheel and the driven wheel;

[0052] S2. Insert the fruit bag upward from the center of the bag-supporting mechanism, and suck and fix the fruit bag with the vacuum suction cup. Then, the third power source drives the driving gear and drives the driven gear to rotate, driving the quadrilateral mechanism consisting of the first driving rod, the second driving rod, the first auxiliary connecting rod, and the second auxiliary connecting rod to open, thereby expanding the fruit bag outward and starting the bagging operation;

[0053] S3, the support rod is driven upward by the first power source until the bag-supporting mechanism exceeds the height of the banana bunch, and then the driving gear is driven to reverse by the third power source, driving the quadrilateral mechanism to close, so that the fruit bag is closed inward to seal the bag, and then the drawstring guide rail and the drawstring retaining ring are controlled to close and surround the outer circumference of the fruit bag, and the drawstring guide rail and the drawstring retaining ring cooperate to form an annular guide groove that can guide the movement path of the drawstring;

[0054] S4, the reel is driven to rotate and the belt is loosened by the second power source, and then the starting end of the belt is passed through the gap between the driving wheel and the driven wheel, the belt guide plate of the belt link mechanism, and the belt guide boss of the belt link mechanism to the entrance of the annular guide groove in sequence, and then the starting end of the belt goes around the annular guide groove and merges with the end of the belt at the entrance, and then the limiting push rod is used to raise the limiting movable plate, the belt guide boss and the belt retaining ring to the preset middle limit position, and then the starting end of the belt is pressed and fixed on the baffle by the pressing block;

[0055] S5, tightening the strap by reversing the strap winding and unwinding mechanism and the driving wheel, and then driving the heating push rod by the eighth power source to drive the heating block toward the baffle, thereby pressing and fixing the end and starting ends of the strap on the baffle, and then cutting and fusing the starting and ending ends of the strap;

[0056] S6, the limit push rod pushes the limit movable plate and drives the strap retaining ring to rise to the preset upper limit. At this time, the strap is tightened on the fruit bag, completing the bundling action;

[0057] S7. All the above mechanisms return to their initial states, completing one bagging operation.

[0058] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and invention concept of the present invention within the scope disclosed by the present invention, which falls within the scope of protection of the present invention.

Claims

1. A banana bagging device based on a belt link mechanism, characterized in that: It includes a support component and a strap winding and unwinding mechanism, a bag-holding mechanism, a strap link mechanism and a heating and shearing mechanism arranged on the support component. The support component includes an outer shell, a support rod arranged at the bottom of the outer shell and a first power source for driving the support rod to move up and down. The bag-holding mechanism is arranged at the front end top of the support mechanism, and is used to suck and fix the fruit bag, and then open the fruit bag outward or retract the fruit bag inward. The strap winding and unwinding mechanism is arranged on one side of the outer shell, and is used to place the strap and control the winding or unwinding of the strap. The strap link mechanism is arranged inside the outer shell, and is used to wrap the strap transferred by the strap winding and unwinding mechanism around the fruit bag and complete the bundling action. The heating and shearing mechanism is arranged inside the outer shell and is located next to the strap link mechanism, and is used to cut and fuse the strap after the bundling action is completed.

2. The banana bagging device based on the belt link mechanism according to claim 1 is characterized in that: One side of the shell is provided with a mounting position for installing a strap winding and unwinding mechanism, and the strap winding and unwinding mechanism includes a reel, a strap and a second power source. The reel is rotatably provided on the mounting position, and the strap is provided on the outer periphery of the reel. One side of the shell is provided with a through hole for the strap to pass through, and the strap is led to the strap link mechanism inside the shell through the through hole. The reel is driven to rotate by the second power source, thereby driving the strap to be wound up or unwound.

3. The banana bagging device based on the belt link mechanism according to claim 1 is characterized in that: The bag-holding mechanism includes a bag-holding shell, a driving gear, a driven gear, a first driving rod, a second driving rod, a first auxiliary connecting rod, a second auxiliary connecting rod, a vacuum suction cup and a third power source. The bag-holding shell is arranged at the front top of the shell. The driving gear and the driven gear are meshed and symmetrically installed on the left and right sides of the inside of the bag-holding shell. One end of the first driving rod is connected to the driving gear, and the other end of the first driving rod is hinged to one end of the first auxiliary connecting rod. One end of the second driving rod is connected to the driven gear, and the other end of the second driving rod is hinged to one end of the second auxiliary connecting rod. The two ends are hinged, and the other end of the first auxiliary link is hinged to the other end of the second auxiliary link. The inner sides of the first driving rod, the second driving rod, the first auxiliary link and the second auxiliary link are respectively provided with vacuum suction cups for sucking and fixing the fruit bags. After the vacuum suction cups suck and fix the fruit bags, the third power source drives the driving gear and drives the driven gear to rotate, thereby driving the opening and closing of the quadrilateral mechanism composed of the first driving rod, the second driving rod, the first auxiliary link and the second auxiliary link, thereby expanding the fruit bag outward or retracting the fruit bag inward, thereby realizing the bagging or sealing operation of the fruit bag.

4. The banana bagging device based on the belt link mechanism according to claim 3 is characterized in that: The third power source is a DC encoding motor that can output a torque signal. Through motor encoding feedback, the length of the belt delivered by the driving gear during each operation remains consistent. When the DC encoding motor reaches a predetermined position, the belt travels around the annular guide groove of the belt link mechanism for one circle to reach the target position.

5. The banana bagging device based on the belt link mechanism according to claim 1, characterized in that: The strap link mechanism includes a strap shell, a limit push rod, a limit movable plate, a driving rod, a strap guide rail, a strap baffle, two supporting guide rods, a baffle, a strap guide boss, a pressure block, a driving wheel, a driven wheel, a strap guide plate, a fourth power source, a fifth power source, a sixth power source and a seventh power source. The strap shell is arranged inside the shell and is located below the bag-supporting mechanism. A limit push rod is provided through the strap shell, and the limit movable plate is arranged on the top of the limit push rod. The limit push rod is driven by the fourth power source to push the limit movable plate up and down, and the limit movable plate is limited to the preset limit positions of upper, middle and lower different heights by the limit push rod. There are two driving rods, which are symmetrically arranged on the left and right sides of the front end of the strap shell, each The driving rod is equipped with a fifth power source for driving its rotation. There are two belt guide rails, which are respectively connected to the two driving rods, and the belt guide rails are in a U-shaped structure. The fifth power source drives the two driving rods to drive the two belt guide rails to open or close, and when in a closed state, the two belt guide rails surround the outer circumference of the fruit bag. There are two belt retaining rings, which are hinged to the left and right sides of the front end of the limiting movable plate, and the two belt retaining rings are movably connected to the two driving rods, and the two belt retaining rings can move up and down along the two driving rods under the drive of the limiting movable plate, and the shape of the belt retaining ring is adapted to the shape of the belt guide rail, and the limiting push rod pushes the limiting movable plate to move downward, so that the belt retaining ring cooperates with the belt guide rail to form a belt. The two guide rails are symmetrically arranged on the left and right sides of the belt shell and are located behind the limit push rod. The two support guide rods extend upward and pass through the limit movable plate and the bag supporting shell of the bag supporting mechanism in sequence, and the support guide rods guide the up and down movement of the limit movable plate. The bottom surface of the limit movable plate is respectively formed with a downwardly extending baffle and a belt guide boss, and the downward extending length of the baffle is greater than the downward extending length of the belt guide boss. The front end of the belt shell is located between the two driving rods and is provided with a baffle groove that matches the baffle. The baffle is inserted into the baffle groove when the limit movable plate moves downward to the preset lowest limit. The pressure block is movably arranged on the belt shell and is located in the annular guide The driving wheel and the driven wheel are meshed and arranged on the belt shell, and are located next to the through-hole of the shell. The belt guide plate is arranged on the belt shell, one end of which is located next to the driving wheel and tangent to the driving wheel, and the other end of which is located behind the pressure block. When the belt guide boss falls to the preset lowest limit position along with the limit movable plate, one end of the belt guide boss is located next to the belt guide plate, and the other end extends to the entrance of the annular guide groove formed by the belt retaining ring and the belt guide rail, and is tangent to the entrance of the annular guide groove. When the belt guide boss rises to the preset middle limit position along with the limit movable plate, the belt guide boss rises synchronously to the top of the belt,The seventh power source drives the driving wheel and the driven wheel to rotate, and then the starting end of the belt transmitted by the belt winding and unwinding mechanism is transmitted through the gap between the driving wheel and the driven wheel, the belt guide plate, and the belt guide boss to the entrance of the annular guide groove. Then, the starting end of the belt makes a circle along the annular guide groove and merges with the end of the belt at the entrance. Then, the starting end of the belt is pressed and fixed to the baffle by the pressure block.

6. The banana bagging device based on the belt link mechanism according to claim 5, characterized in that: The left and right sides of the front end of the limiting movable plate are respectively provided with hinge holes for connecting corresponding strap retaining rings, and the driving rod is provided with two slide rails along its height direction. One side of the strap retaining ring is provided with an extension part for connecting with the driving rod and the limiting movable plate, and a mounting hole is provided on the extension part, and a slide groove for matching with the two slide rails is provided on the inner wall of the mounting hole, so that the strap retaining ring can move up and down along the driving rod through the cooperation of the slide groove and the slide rail. A frustum structure for hinged connection with the limiting movable plate is provided on the outer wall of the extension part, and the frustum structure is connected with the frustum groove on the inner wall of the hinge hole of the limiting movable plate with clearance matching.

7. The banana bagging device based on the belt link mechanism according to claim 5, characterized in that: The surfaces of the driving wheel and the driven wheel are both provided with a silicone layer for increasing friction, and the gap between the driving wheel and the driven wheel is smaller than the thickness of the belt. The discharge and tightening of the belt are achieved by the forward and reverse rotation of the driving wheel.

8. The banana bagging device based on the belt link mechanism according to claim 1, characterized in that: The heating and shearing mechanism includes a heating push rod, a heating block and an eighth power source. The heating push rod is arranged inside the outer shell and is located at the top of the strap shell of the strap winding mechanism. The heating block is arranged at the front end of the heating push rod and is located behind the strap guide boss of the strap winding mechanism. The heating push rod is driven by the eighth power source to drive the heating block to move toward the baffle of the strap winding mechanism, thereby pressing the end and starting ends of the strap to be fixed on the baffle, and then the starting end and end of the strap are cut off and fused by the heating block.

9. The banana bagging device based on the belt link mechanism according to claim 8, characterized in that: The front end surface of the heating block is provided with a sharp knife structure for cutting the band.

10. An operating method of a banana bagging device based on a belt link mechanism according to any one of claims 1 to 9, characterized in that: The following steps are involved: In the initial state, the limit movable plate of the belt link mechanism is at the preset lowest limit position, the belt guide rail and the belt retaining ring of the belt link mechanism are respectively in the open state, and the starting end of the belt passes through the through hole and is located between the driving wheel and the driven wheel of the belt link mechanism; Insert the fruit bag upward from the center of the bag-supporting mechanism, and the vacuum suction cup of the bag-supporting mechanism sucks and fixes the fruit bag, and then stretches the fruit bag outward to start the bagging operation; The support rod is driven upward by a first power source until the bag-supporting mechanism exceeds the height of the banana bunch, and then the bag is closed inward by the bag-supporting mechanism. Then, the drawstring guide rail and the drawstring retaining ring are controlled to close and surround the outer circumference of the fruit bag. The drawstring guide rail and the drawstring retaining ring cooperate to form an annular guide groove that can guide the movement path of the drawstring; The belt is loosened by the belt winding and unwinding mechanism, and then the starting end of the belt is passed through the gap between the driving wheel and the driven wheel, the belt guide plate of the belt link mechanism, and the belt guide boss of the belt link mechanism to the entrance of the annular guide groove through the belt link mechanism. Then, the starting end of the belt goes around the annular guide groove and merges with the end of the belt at the entrance. Then, the limiting push rod of the belt link mechanism raises the limiting movable plate, the belt guide boss and the belt retaining ring to the preset middle limit position, and then the starting end of the belt is pressed and fixed on the baffle of the belt link mechanism by the pressure block of the belt link mechanism; The band is tightened by the band winding mechanism, and then the end and starting end of the band are pressed and fixed on the baffle by the heating and shearing mechanism, thereby cutting off and fusing the starting and ending ends of the band; The limit push rod pushes the limit movable plate and drives the strap retaining ring to rise to the preset upper limit. At this time, the strap is tightened on the fruit bag to complete the bundling action; All the above mechanisms return to their initial states, completing one bagging operation.

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