An automatic feeding and strapping machine for long corner protectors

Abstract

This invention relates to the field of automatic feeding and bundling technology for long corner protectors, specifically an integrated automatic feeding and bundling machine for long corner protectors. It includes a processing base plate, with symmetrically fixed sliding guide rails on the top of the base plate. An inverted U-shaped frame is mounted on the sliding guide rails via an electric slider. Bundling machines are installed on both vertical sections of the inverted U-shaped frame. A placement block is fixed to the rear side of the top of the processing base plate. An installation mechanism is installed at the bottom of the horizontal section of the inverted U-shaped frame. A pressure-reducing component is located at the middle of the top of the horizontal section of the inverted U-shaped frame. Placement frames for holding long corner protectors are symmetrically installed on the top of the processing base plate, inside the two sliding guide rails. This invention uses the pressure of fixed and adjustable pressure columns to cause the long corner protector to sway when the bundling machine binds the long corner protector and the protected item. Simultaneously, the fixed and adjustable pressure columns exert greater pressure away from the bundling position, achieving a balance of forces applied to the long corner protector by the bundling tape.

Description

Technical Field

[0001] This invention relates to the field of automatic feeding and bundling technology for long corner protectors, specifically an integrated automatic feeding and bundling machine for long corner protectors. Background Technology

[0002] Long corner protectors are protective gear used to protect easily impacted items such as packaging boxes and furniture. They are typically made of rigid plastic, rubber, or cardboard, possessing a certain degree of toughness and durability, effectively preventing damage to furniture, wall corners, etc., from impacts. Long corner protectors are usually installed to the packaging box by bundling. However, in actual production, bundling often involves placing the positioned long corner protectors along with the protective components at the bundling machine position, which is inefficient. Therefore, finding an effective bundling method has become a challenge.

[0003] To address the above issues, patent application CN115892568A discloses a top-binding long corner protector integrated machine. This solution uses a conveyor to transport the goods to below the support frame. Simultaneously, the moving mechanism and slide rails adjust the position of the support frame above the goods, allowing the machine head to move above the two long corner protector compartments. A lifting mechanism lowers the machine head, and the suction unit removes the long corner protectors from the compartments and attaches them tightly to the goods. A binding mechanism then binds the protectors. This process is repeated to place and bind the corner protectors. This structural design integrates the binding and placement of long corner protectors, saving time and improving work efficiency.

[0004] While the above-mentioned technical solutions can significantly increase the efficiency of bundling long corner protectors with packaging boxes, the slight protrusions or wrinkles on the corners of the packaging boxes can cause the long corner protectors to detach from the clamps when positioned on the packaging boxes to be protected, affecting their use and bundling. In addition, due to the force generated during bundling and the pressure distribution after installation, the bundling tape may damage or deform the long corner protectors, affecting their use and subsequent protective function. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an automatic feeding and strapping machine for long corner protectors, including a processing base plate, with sliding guide rails symmetrically fixed on the top of the processing base plate, an inverted U-shaped frame installed on the sliding guide rails via an electric slider, strapping machines installed on both vertical sections of the inverted U-shaped frame, a placement block fixed on the rear side of the top of the processing base plate, an installation mechanism installed at the bottom of the horizontal section of the inverted U-shaped frame, a pressing component installed at the middle position of the top of the horizontal section of the inverted U-shaped frame, and a placement frame for placing long corner protectors symmetrically installed on the top of the processing base plate and inside the two sliding guide rails.

[0006] The installation mechanism includes a limiting slide rail fixed to the bottom of the horizontal section of the inverted U-shaped frame. The limiting slide rail is slidably connected to symmetrical vertical columns. Each vertical column has a pressure block fitted at its bottom. A compression spring is provided between the bottom of the vertical column and the bottom of the pressure block. A collection plate is fixed to the bottom of the pressure block. Sliding columns are symmetrically arranged on the front of the collection plate. The sliding columns pass through the collection plate and slide with it. Each sliding column has a right-angle clamping claw hinged at its bottom. The tops of the two sliding columns slide up and down through a power component.

[0007] A rotary motor is installed at the bottom right end of the horizontal section of the inverted U-shaped frame via a motor box. A bidirectional threaded rod is fixed at the output end of the rotary motor. The bidirectional threaded rod rotates on a positioning block at the middle position of the bottom of the horizontal section of the inverted U-shaped frame. The left and right sections of the bidirectional threaded rod are respectively connected to two vertical columns by threaded engagement.

[0008] A downward-pushing cylinder is fixed at the middle of the bottom of the assembly plate. A mounting plate is fixed at the bottom of the downward-pushing cylinder. Fixed pressure columns and adjustable pressure columns are respectively provided at the front and rear of the bottom of the mounting plate. A pressing component is provided at the bottom of the mounting plate and between the fixed pressure columns and the adjustable pressure columns. The pressing component includes connecting columns that are symmetrically hinged to the bottom of the mounting plate. An elastic rod is slidably connected inside the connecting column. A pressing plate is hinged to the bottom of each elastic rod. A downward-pressing spring is fixed between the connecting column and the mounting plate. A vertical pressing component is fixed on the side of the mounting plate away from the axis of symmetry of the two vertical columns.

[0009] Furthermore, the clamping right-angle claw has a track slide column fixed to its right-angle side near the axis of symmetry of the two vertical columns by two extension rods; an arc-shaped track block is provided at the bottom of the assembly plate and at the position corresponding to the track slide column, and a guide block is fixed at the bottom of each arc-shaped track block.

[0010] Furthermore, the power component includes a clamping power cylinder fixed to the top of the assembly plate and located on the side of the pressure block away from the axis of symmetry of the two vertical columns. The pushing end of the clamping power cylinder is fixed with a driving plate, and the front and rear ends of the driving plate are respectively fixedly connected to the top of the sliding column.

[0011] Furthermore, the vertical pressing component includes a lower extension plate fixed to the side of the mounting plate away from the axis of symmetry of the two vertical columns. The bottom of the lower extension plate is rotatably mounted with pressure rollers via two symmetrically fixed mounting brackets. The pressure rollers have a linearly distributed circular array of elastic extension rods, and each elastic extension rod has an arc-shaped rolling plate fixed to its protruding end.

[0012] Furthermore, both the fixed pressure column and the adjustable pressure column have a lower pressure plate fixed at their bottom ends, a spring plate is fixed at the top of the fixed pressure column, and a pressure spring is fixed between the spring plate and the top of the mounting plate.

[0013] Furthermore, the adjustable pressure column penetrates the assembly plate, and a second pressure spring is fixed between the lower pressure plate of the adjustable pressure column and the bottom of the mounting plate. A lifting inclined block is fixed at the upper end of the adjustable pressure column and above the assembly plate. An upper support plate is fixed at the top of the assembly plate behind the lifting inclined block. A front push cylinder is installed at the front end of the upper support plate, and an upper lifting inclined block is fixed at the pushing end of the front push cylinder.

[0014] Furthermore, the pressing assembly includes a sliding frame plate symmetrically slidably mounted on the horizontal section of the inverted U-shaped frame, with a pressing inclined block fixed at the bottom of the sliding frame plate for pressing down on the pressure block; a rotating shaft is rotatably mounted at the middle of the top of the horizontal section of the inverted U-shaped frame, with a rotating rod fixed at the top of the rotating shaft, and a connecting rod is rotatably mounted at the top of the sliding frame plate, with the two connecting rods respectively hinged to the two ends of the rotating rod.

[0015] Furthermore, a vertical block is fixed to the top right end of the horizontal section of the inverted U-shaped frame, and a threaded post is installed on the vertical block by means of threaded engagement. The left end of the threaded post is rotatably installed on the sliding frame plate on the right side, and a crank is fixed to the right end of the threaded post.

[0016] The beneficial effects of this invention are as follows: First, this invention adopts a conveying method where the long corner protector is higher than the upper side of the packaging box, preventing the long corner protector from deforming and failing to be fastened to the packaging box. At the same time, after the long corner protector moves into place, it is pressed down so that the long corner protector can be accurately locked onto the upper part of the packaging box. This is mainly achieved by the pressing component pressing the pressure block when the vertical column moves to the corner of the packaging box, and causing the two clamping right-angle claws to drive the long corner protector to move downward synchronously and accurately press it into the corner of the packaging box.

[0017] Second, the present invention uses the pressure of fixed and adjustable pressure columns to stabilize the long corner protector and prevent it from shaking when the strapping machine is binding the long corner protector and the packaging box. Furthermore, because the force exerted by the strapping tape on the long corner protector during strapping will cause the end of the long corner protector away from the binding position to be subjected to a large force away from the packaging box, which may cause damage or deformation to the long corner protector, the fixed and adjustable pressure columns are used to balance the force exerted by the strapping tape on the long corner protector when binding the long corner protector and the packaging box on one side.

[0018] Third, the present invention installs the long corner protector through an installation mechanism, and uses a track sliding column in conjunction with an arc track block and a guide block to enable the clamping right-angle claws to clamp the long corner protector in accordance with the right-angle support plate. At the same time, it rotates in accordance with the corner of the packaging box, thereby making the long corner protector easy to install. In addition, the power component synchronously drives the front and rear clamping right-angle claws to clamp, so that the front and rear clamping are synchronized and the stability of the long corner protector is increased during the movement of the inverted U-shaped frame.

[0019] Fourth, this invention uses an extrusion component to extrude the top of the long corner protector pressed against the corner of the packaging box, thereby preventing the middle of the long corner protector from deforming during the extrusion process. Furthermore, the extrusion plate expands outward to extrude the middle of the top of the long corner protector during both the upward and downward movement, further ensuring that the middle of the long corner protector will not deform. At the same time, the vertical extrusion component presses against the side of the long corner protector pressed against the corner of the packaging box, thereby making the long corner protector fit the side of the packaging box more closely. In addition, the use of multiple arc-shaped rolling plates to press against the side of the long corner protector increases the effect of vertical extrusion. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the placement rack of the present invention.

[0023] Figure 3 This is a partial structural diagram of the slider guide rail, inverted U-shaped frame, mounting mechanism and pressing component in this invention.

[0024] Figure 4 This is a first-view partial structural diagram of the inverted U-shaped frame, the mounting mechanism, and the pressure-absorbing component in this invention.

[0025] Figure 5 This is a partial structural diagram from a second perspective of the inverted U-shaped frame, the mounting mechanism, and the pressure-retaining component in this invention.

[0026] Figure 6 This is a first-view structural diagram of the installation mechanism in this invention.

[0027] Figure 7 This is a second-view structural schematic diagram of the mounting mechanism in this invention.

[0028] Figure 8 This is a partial sectional view of the mounting mechanism in this invention.

[0029] Figure 9 This is a schematic diagram of the pressure roller in this invention.

[0030] Figure 10 This is a cross-sectional view of the pressure roller in this invention.

[0031] In the diagram: 1. Machining base plate; 2. Slider guide rail; 21. Electric slider; 3. Inverted U-shaped frame; 31. Strapping machine; 32. Rotary motor; 321. Bidirectional threaded rod; 322. Positioning block; 4. Mounting mechanism; 41. Limiting slide rail; 411. Vertical column; 412. Pressure block; 413. Collection plate; 414. Sliding column; 42. Clamping right-angle claw; 421. Extension rod; 422. Track slide column; 423. Arc-shaped track block; 424. Guide block; 43. Power component; 431. Clamping power cylinder; 432. Driving plate; 44. Downward push cylinder; 441. Mounting plate; 442. Fixed pressure column; 443. Spring plate; 444. No. 1 pressure spring; 45. 451. Pressure regulating column; 452. Lower pressure plate; 453. No. 2 pressure spring; 454. Lifting inclined block; 455. Upper support plate; 456. Front push cylinder; 457. Lifting inclined block; 46. Extrusion component; 461. Connecting column; 462. Elastic rod; 463. Extrusion plate; 47. Vertical pressing component; 471. Lower extension plate; 472. Mounting frame; 473. Pressure roller; 474. Elastic extension rod; 475. Arc-shaped rolling plate; 5. Pressing assembly; 51. Sliding frame plate; 511. Lower pressing inclined block; 512. Connecting rod; 52. Rotating shaft; 521. Rotating rod; 53. Vertical block; 531. Threaded column; 6. Placement frame; 61. Support block; 62. Right angle support plate; 63. Blocking plate. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0033] See Figure 1 An automatic feeding and bundling machine for long corner protectors includes a processing base plate 1. Sliding guide rails 2 are symmetrically fixed to the top of the processing base plate 1. An inverted U-shaped frame 3 is mounted on the sliding guide rails 2 via an electric slider 21. Bundling machines 31 are installed on both vertical sections of the inverted U-shaped frame 3. A placement block is fixed to the rear top of the processing base plate 1. An installation mechanism 4 is installed at the bottom of the horizontal section of the inverted U-shaped frame 3. A pressing component 5 is located at the middle of the top of the horizontal section of the inverted U-shaped frame 3. Placement racks 6 for placing long corner protectors are symmetrically installed on the top of the processing base plate 1, inside the two sliding guide rails 2. This invention automatically feeds long corner protectors by using the inverted U-shaped frame 3 to drive the installation mechanism 4. The installation mechanism 4, in conjunction with the pressing component 5, positions the long corner protectors. Finally, the bundling machines 31 bundle the long corner protectors.

[0034] Specifically, the packaging box is first placed on top of the placement block. Then, the electric slider 21 is controlled to move the inverted U-shaped frame 3 forward. When it reaches the front end, the installation mechanism 4 is controlled to pick up the pre-stacked long corner protectors from the placement frame 6. Then, the electric slider 21 drives the inverted U-shaped frame 3 to bring the long corner protectors to the packaging box position and the installation mechanism 4 is controlled to position the long corner protectors. After that, the strapping machine 31 is used to strap the long corner protectors and the packaging box together to complete the strapping.

[0035] See Figure 2 In this embodiment, the placement frame 6 includes a support block 61 fixed to the top of the processing base plate 1. A right-angle support plate 62 is fixed to the top of the support block 61, and protective railings are symmetrically fixed to the left and right sides of the top of the support block 61. A blocking plate 63 is fixed to the rear side of the support block 61 via a bracket. The placement frame 6 allows for quick placement of long corner protectors and rapid positioning of the clamping position. The blocking plate 63 limits the pushing distance of the long corner protectors, thereby precisely controlling the clamping position of the installation mechanism 4 on the long corner protectors.

[0036] See Figures 3-7 The installation mechanism 4 includes a limiting slide rail 41 fixed to the bottom of the horizontal section of the inverted U-shaped frame 3. Symmetrical vertical columns 411 are slidably connected within the limiting slide rail 41. Each vertical column 411 has a pressure block 412 fitted at its bottom. A pressure spring is provided between the bottom of the vertical column 411 and the bottom of the pressure block 412. A collection plate 413 is fixed to the bottom of the pressure block 412. Symmetrical sliding columns 414 are arranged on the collection plate 413, penetrating through it. And it slides in cooperation with it. Each sliding column 414 has a clamping right angle claw 42 hinged at the bottom. The tops of the two sliding columns 414 slide up and down through the power component 43. The right angle side of the clamping right angle claw 42 near the axis of symmetry of the two vertical columns 411 is fixed to the track sliding column 422 through two extension rods 421. The bottom of the assembly plate 413 and the position corresponding to the track sliding column 422 are provided with an arc-shaped track block 423. The bottom of each arc-shaped track block 423 is fixed with a guide block 424.

[0037] The mounting mechanism 4 is used to install the long corner protector. The track slide column 422, in conjunction with the arc-shaped track block 423 and guide block 424, allows the clamping right-angle claw 42 to grip the long corner protector corresponding to the right-angle support plate 62, rotating to correspond to the corner of the packaging box. This facilitates the installation of the long corner protector. Simultaneously, the power component 43 synchronously drives the front and rear clamping right-angle claws 42, ensuring synchronized clamping and increasing the stability of the long corner protector during the movement of the inverted U-shaped frame 3. Specifically, when the electric slider 21... When the U-shaped frame 3 moves forward to the frontmost position, the control power component 43 pushes the sliding column 414. Then, the clamping right-angle claw 42, under its own weight, becomes parallel to the long corner protector. At this time, the clamping right-angle claw 42 clamps the long corner protector. After the clamping is stable, the power component 43 drives the sliding column 414 upward and drives the clamping right-angle claw 42 upward. At this time, the trajectory sliding column 422 follows the arc-shaped trajectory block 423 and drives the clamping right-angle claw 42 to rotate to a state parallel to the corner of the packaging box. After that, the driving action of the power component 43 stops.

[0038] It should be noted that in order for the clamping right-angle claw 42 to stably clamp the long corner protector, it is necessary to use vacuum suction cups to pick up both sides of the long corner protector. Therefore, vacuum suction cups are installed on both right-angle sides of the clamping right-angle claw 42. In addition, in order to increase the stability of the clamping right-angle claw 42 when rotating, a protective baffle is also provided to further stabilize the sliding engagement between the trajectory slide column 422, the arc-shaped trajectory block 423, and the guide block 424.

[0039] See Figures 6-7 The power component 43 includes a clamping power cylinder 431 fixed to the top of the assembly plate 413 and located on the side of the pressure block 412 away from the axis of symmetry of the two vertical columns 411. The pushing end of the clamping power cylinder 431 is fixed with a driving plate 432, and the front and rear ends of the driving plate 432 are respectively fixedly connected to the top of the sliding column 414. The power component 43 is used to simultaneously push and retract the two clamping right-angle claws 42. Specifically, when it is necessary to control the clamping right-angle claws 42 to clamp the long corner protector, the clamping power cylinder 431 is first controlled to retract and drive the driving plate 432 to move downward. When it is necessary to control the clamping right-angle claws 42 to position the long corner protector before installation, the clamping power cylinder 431 is controlled to drive the driving plate 432 to move upward.

[0040] See Figure 5A rotary motor 32 is mounted on the bottom right end of the horizontal section of the inverted U-shaped frame 3 via a motor box. A bidirectional threaded rod 321 is fixed to the output end of the rotary motor 32. The bidirectional threaded rod 321 rotates on a positioning block 322 located in the middle of the bottom of the horizontal section of the inverted U-shaped frame 3. The left and right sections of the bidirectional threaded rod 321 are connected to two vertical columns 411 via threaded engagement. By synchronously moving the two vertical columns 411 through the bidirectional threaded rod 321, not only can the two long corner protectors move synchronously in opposite directions under the gripping of their respective clamping right-angle claws 42, but the position of the packaging box can also be slightly adjusted. Specifically, after the clamping right-angle claws 42 have gripped the long corner protector, the electric slider 21 is first controlled to move the inverted U-shaped frame 3 to the packaging box position. Then, the rotary motor 32 is controlled to rotate the bidirectional threaded rod 321, causing the two long corner protectors to move synchronously in opposite directions under the relative movement of the vertical columns 411.

[0041] See Figures 3-5 The pressing component 5 includes a sliding frame plate 51 symmetrically slidably mounted on the horizontal section of the inverted U-shaped frame 3. A pressing inclined block 511 for pressing down the pressure block 412 is fixed at the bottom of the sliding frame plate 51. A rotating shaft 52 is rotatably mounted at the middle position of the top of the horizontal section of the inverted U-shaped frame 3. A rotating rod 521 is fixed at the top of the rotating shaft 52. A connecting rod 512 is rotatably mounted at the top of the sliding frame plate 51. The two connecting rods 512 are respectively hinged to the two ends of the rotating rod 521. A vertical block 53 is fixed at the right end of the top of the horizontal section of the inverted U-shaped frame 3. A threaded post 531 is installed on the vertical block 53 by means of threaded engagement. The left end of the threaded post 531 is rotatably mounted on the right sliding frame plate 51. A crank is fixed at the right end of the threaded post 531. The pressing component 5 is used to press the pressure block 412 when the vertical column 411 moves to the corner of the packaging box, and to make the two clamping right-angle claws 42 move the long corner protector downward synchronously and accurately press it into the corner of the packaging box. At the same time, the sliding frame plate 51 stops the vertical column 411, thereby protecting the long corner protector from damage caused by the packaging box squeezing it during installation. Furthermore, the downward pressing block 511 presses down on the pressure block 412, so that the long corner protector is positioned slightly higher than the packaging box during installation, avoiding the long corner protector from being crushed or falling off due to slight protrusions or wrinkles on the corner of the packaging box.

[0042] Specifically, after the packaging box is placed on top of the placement block, the position of the sliding frame plate 51 is adjusted according to the size of the packaging box. First, the screw column 531 is rotated by the crank handle, which drives the right sliding frame plate 51 to move. At the same time, the left sliding frame plate 51 moves synchronously due to the driving action of the two connecting rods 512 and the rotating rod 521. When the long corner protector is positioned, the pressure block 412 is pressed down by the downward pressure inclined block 511, and at the same time, the long corner protector is precisely pressed against the corner of the packaging box due to the pushing action.

[0043] See Figures 6-10 A downward-pushing cylinder 44 is fixed at the bottom center of the assembly plate 413. A mounting plate 441 is fixed at the bottom of the downward-pushing cylinder 44. Fixed pressure columns 442 and adjustable pressure columns 45 are respectively provided at the front and rear of the bottom of the mounting plate 441. A pressing member 46 is provided at the bottom of the mounting plate 441, between the fixed pressure columns 442 and the adjustable pressure columns 45. The pressing member 46 includes connecting columns 461 symmetrically hinged to the bottom of the mounting plate 441. Elastic rods 462 are slidably connected within the connecting columns 461. Each elastic rod 462 has a pressing plate 463 hinged at its bottom. A downward pressure spring is fixed between 61 and the mounting plate 441; a vertical pressing member 47 is fixed on the side of the mounting plate 441 away from the axis of symmetry of the two vertical columns 411; the vertical pressing member 47 includes a lower extension plate 471 fixed on the side of the mounting plate 441 away from the axis of symmetry of the two vertical columns 411, and a pressure roller 473 is rotatably mounted on the bottom of the lower extension plate 471 through two symmetrically fixed mounting brackets 472. The pressure roller 473 has a linearly distributed circular array of elastic extension rods 474, and an arc-shaped rolling plate 475 is fixed to the protruding end of each elastic extension rod 474.

[0044] The extrusion member 46 is used to extrude the top of the long corner protector pressed against the corner of the packaging box, thereby preventing the middle of the long corner protector from deforming during the extrusion process. Furthermore, the extrusion plate 463 expands the extrusion outwards, ensuring that the middle of the top of the long corner protector is extruded during both upward and downward movements, further ensuring that the middle of the long corner protector does not deform. Simultaneously, the vertical extrusion member 47 presses against the sides of the long corner protector pressed against the corner of the packaging box, making the long corner protector fit the sides of the packaging box more closely. In addition, multiple curved rolling plates 475 press against the sides of the long corner protector to enhance the effect of the vertical extrusion. Specifically, after the long corner protector is pressed against the corner of the packaging box, the push cylinder 44 is controlled to move the mounting plate 441 downward. At this time, the extrusion plate 463 presses against the top of the long corner protector. Due to the continuous push of the push cylinder 44, the two extrusion plates 463 respectively drive their connecting column 461 and elastic rod 462 to expand back and forth, and fully press the top of the long corner protector. At the same time, the arc-shaped rolling plate 475 will roll the side of the long corner protector under the action of the elastic extension rod 474, and drive the pressure roller 473 to rotate, continuously rolling the side of the long corner protector, thereby further preventing the long corner protector from deformation.

[0045] Continue reading Figures 6-7Both the fixed pressure column 442 and the adjustable pressure column 45 have a lower pressure plate 451 fixed at their bottom ends. The fixed pressure column 442 has a spring plate 443 fixed at its top end. A first pressure spring 444 is fixed between the spring plate 443 and the top of the mounting plate 441. The adjustable pressure column 45 passes through the collection plate 413. A second pressure spring 452 is fixed between the lower pressure plate 451 of the adjustable pressure column 45 and the bottom of the mounting plate 441. A lifting inclined block 453 is fixed at the upper end of the adjustable pressure column 45 and above the collection plate 413. An upper support plate 454 is fixed at the top of the collection plate 413 behind the lifting inclined block 453. A front push cylinder 455 is installed at the front end of the upper support plate 454. An upper lifting inclined block 456 is fixed at the pushing end of the front push cylinder 455. The pressure from the fixed pressure column 442 and the adjustable pressure column 45 ensures the stability of the long corner protector during the strapping machine 31's bundling of the long corner protector and the packaging box, preventing it from shaking. Furthermore, when the strapping machine 31 performs strapping, the force exerted by the strapping tape on the long corner protector causes a greater force on the end of the long corner protector furthest from the strapping position, potentially leading to damage or deformation. Therefore, when strapping the long corner protector and the packaging box on one side, the fixed pressure column 442 and the adjustable pressure column 45 balance the force exerted by the strapping tape on the long corner protector. The fixed pressure column 442 and the adjustable pressure column 45 exert greater pressure on the long corner protector furthest from the strapping position, thus achieving a balance of the force applied by the strapping tape on the long corner protector.

[0046] Specifically, after the pressing component 46 and the vertical pressing component 47 have finished pressing, the fixed pressure column 442 and the adjustable pressure column 45 both press against the top of the long corner protector. Since the pressure provided by the first pressure spring 444 is less than the pressure provided by the second pressure spring 452, the pressure of the adjustable pressure column 45 is greater than that of the fixed pressure column 442. First, the front strapping machine 31 straps the long corner protector and the packaging box. After strapping, the front push cylinder 455 is controlled to push the lifting inclined block 456 forward, causing the lifting inclined block 456 to lift the lifting inclined block 453 upward, thereby driving the lower pressure plate 451 of the adjustable pressure column 45 upward away from the top of the long corner protector. At this time, only the pressure of the fixed pressure column 442 remains, and the rear strapping machine 31 straps the long corner protector and the packaging box again.

[0047] It should be noted that the strapping machine 31 is composed of a vertical section and a horizontal section. The horizontal section of the strapping machine can be pushed to the right by a multi-stage electric push rod, thereby avoiding the influence on the movement of the inverted U-shaped frame 3. This combination of strapping machines 31 is widely used in the prior art and is not the inventive point of this invention, so it will not be described in detail.

[0048] The working steps of the present invention are as follows: First, the packaging box is placed on top of the placement block, and then the electric slider 21 is controlled to drive the inverted U-shaped frame 3 to move forward.

[0049] In the second step, when the electric slider 21 drives the inverted U-shaped frame 3 to move forward to the front end, the clamping power cylinder 431 is controlled to retract and drive the driving plate 432 to move downward and push the sliding column 414. Then, the clamping right-angle claw 42 is parallel to the long corner protector under its own weight. At this time, the clamping right-angle claw 42 clamps the long corner protector. After the clamping is stable, the clamping power cylinder 431 is controlled to drive the driving plate 432 to move upward and drive the sliding column 414 and the clamping right-angle claw 42 to move upward together. At this time, the trajectory sliding column 422 follows the arc-shaped trajectory block 423 and drives the clamping right-angle claw 42 to rotate to a state parallel to the corner of the packaging box. After that, the driving action of the power component 43 is stopped.

[0050] Third, after the packaging box is placed on top of the placement block, the position of the sliding frame plate 51 is adjusted according to the size of the packaging box. First, the screw column 531 is rotated by the crank handle, which drives the right sliding frame plate 51 to move. At the same time, the left sliding frame plate 51 moves synchronously due to the driving action of the two connecting rods 512 and the rotating rod 521. When the long corner protector is positioned, the pressure block 412 is pressed down by the downward pressure inclined block 511, and at the same time, the long corner protector is precisely pressed against the corner of the packaging box due to the pushing action.

[0051] Fourth step: After the long corner protector is pressed against the corner of the packaging box, first control the push cylinder 44 to drive the mounting plate 441 to move downward. At this time, the extrusion plate 463 presses against the top of the long corner protector. Due to the continuous push of the push cylinder 44, the two extrusion plates 463 respectively drive their respective connecting columns 461 and elastic rods 462 to expand back and forth, and fully press the top of the long corner protector. At the same time, the arc-shaped rolling plate 475 will roll the side of the long corner protector under the action of the elastic extension rod 474, and drive the pressure roller 473 to rotate, continuously rolling the side of the long corner protector.

[0052] Fifth step: After the pressing component 46 and the vertical pressing component 47 have finished pressing, the fixed pressing column 442 and the adjustable pressing column 45 are both pressing against the top of the long corner protector. At this time, the pressure of the adjustable pressing column 45 is greater than that of the fixed pressing column 442. First, the front strapping machine 31 is used to strap the long corner protector and the packaging box. After strapping, the front push cylinder 455 is controlled to push the lifting inclined block 456 forward and make the lifting inclined block 456 lift the lifting inclined block 453 upward, thereby driving the lower pressing plate 451 of the adjustable pressing column 45 upward away from the top of the long corner protector. At this time, only the pressure of the fixed pressing column 442 remains, so the rear strapping machine 31 is used to strap the long corner protector and the packaging box again.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered within the protection scope of the present invention.

Claims

1. An automatic feeding and strapping machine for long corner protectors, comprising a processing base plate (1), wherein sliding guide rails (2) are symmetrically fixed on the top of the processing base plate (1), and an inverted U-shaped frame (3) is mounted on the sliding guide rails (2) via an electric slider (21), and strapping machines (31) are provided on both vertical sections of the inverted U-shaped frame (3), and a placement block is fixed on the rear side of the top of the processing base plate (1), characterized in that, An installation mechanism (4) is installed at the bottom of the horizontal section of the inverted U-shaped frame (3), and a pressing component (5) is provided at the middle position of the top of the horizontal section of the inverted U-shaped frame (3). A placement rack (6) for placing long corner protectors is symmetrically installed on the top of the processing base plate (1) and on the inner side of the two slider guide rails (2). The installation mechanism (4) includes a limiting slide rail (41) fixed to the bottom of the horizontal section of the inverted U-shaped frame (3). The limiting slide rail (41) is slidably connected with vertical columns (411) that are symmetrical on the left and right. Each vertical column (411) is fitted with a pressure block (412) at the bottom. A pressure spring is provided between the bottom of the vertical column (411) and the bottom of the pressure block (412). A collection plate (413) is fixed to the bottom of the pressure block (412). Sliding columns (414) are symmetrically arranged on the collection plate (413). The sliding columns (414) penetrate the collection plate (413) and slide with it. Each sliding column (414) is hinged with a clamping right angle claw (42) at the bottom. The tops of the two sliding columns (414) slide up and down through a power component (43). A rotary motor (32) is installed at the bottom right end of the horizontal section of the inverted U-shaped frame (3) through a motor box. A bidirectional threaded rod (321) is fixed at the output end of the rotary motor (32). The bidirectional threaded rod (321) rotates on the positioning block (322) at the middle position of the bottom of the horizontal section of the inverted U-shaped frame (3). The left and right sections of the bidirectional threaded rod (321) are connected to two vertical columns (411) by threaded engagement. A downward-pushing cylinder (44) is fixed at the middle of the bottom of the assembly plate (413). A mounting plate (441) is fixed at the bottom of the downward-pushing cylinder (44). A fixed pressure column (442) and an adjustable pressure column (45) are respectively provided at the front and rear of the bottom of the mounting plate (441). A pressing member (46) is provided at the bottom of the mounting plate (441) and between the fixed pressure column (442) and the adjustable pressure column (45). The pressing member (46) includes a connecting column (461) symmetrically hinged to the bottom of the mounting plate (441). An elastic rod (462) is slidably connected inside the connecting column (461). A pressing plate (463) is hinged to the bottom of each elastic rod (462). A downward-pressing spring is fixed between the connecting column (461) and the mounting plate (441). A vertical pressing member (47) is fixed on the side of the mounting plate (441) away from the axis of symmetry of the two vertical columns (411). The clamping right-angle claw (42) is fixed to a track slide column (422) by two extension rods (421) near the right-angle side of the axis of symmetry of the two vertical columns (411); an arc-shaped track block (423) is provided at the bottom of the assembly plate (413) and at the position corresponding to the track slide column (422), and a guide block (424) is fixed at the bottom of each arc-shaped track block (423); The vertical pressing member (47) includes a lower extension plate (471) fixed on the side of the mounting plate (441) away from the axis of symmetry of the two vertical columns (411). The bottom of the lower extension plate (471) is rotatably mounted with a pressure roller (473) through two symmetrically fixed mounting brackets (472). The pressure roller (473) has a linearly distributed circular array of elastic extension rods (474), and each elastic extension rod (474) has an arc-shaped rolling plate (475) fixed at its protruding end.

2. The automatic feeding and strapping machine for long corner protectors according to claim 1, characterized in that, The power component (43) includes a clamping power cylinder (431) fixed on the top of the assembly plate (413) and located on the side of the pressure block (412) away from the axis of symmetry of the two vertical columns (411). The pushing end of the clamping power cylinder (431) is fixed with a driving plate (432), and the front and rear ends of the driving plate (432) are respectively fixedly connected to the top of the sliding column (414).

3. The automatic feeding and strapping machine for long corner protectors according to claim 1, characterized in that, The bottom ends of the fixed pressure column (442) and the adjustable pressure column (45) are both fixed with a lower pressure plate (451). The top end of the fixed pressure column (442) is fixed with a spring plate (443). A pressure spring (444) is fixed between the spring plate (443) and the top of the mounting plate (441).

4. The automatic feeding and strapping machine for long corner protectors according to claim 3, characterized in that, The adjustable pressure column (45) passes through the assembly plate (413). A second pressure spring (452) is fixed between the bottom of the lower pressure plate (451) and the mounting plate (441) of the adjustable pressure column (45). A lifting inclined block (453) is fixed at the upper end of the adjustable pressure column (45) and above the assembly plate (413). An upper support plate (454) is fixed at the top of the assembly plate (413) behind the lifting inclined block (453). A front push cylinder (455) is installed at the front end of the upper support plate (454). An upper lifting inclined block (456) is fixed at the pushing end of the front push cylinder (455).

5. The automatic feeding and strapping machine for long corner protectors according to claim 1, characterized in that, The pressure-reducing component (5) includes a sliding frame plate (51) symmetrically slidably mounted on the horizontal section of the inverted U-shaped frame (3). The bottom of the sliding frame plate (51) is fixed with a downward pressure block (511) for pressing down the pressure block (412). A rotating shaft (52) is rotatably installed at the middle position of the top of the horizontal section of the inverted U-shaped frame (3). A rotating rod (521) is fixed at the top of the rotating shaft (52). A connecting rod (512) is rotatably installed at the top of the sliding frame plate (51). The two connecting rods (512) are respectively hinged to the two ends of the rotating rod (521).

6. The automatic feeding and strapping machine for long corner protectors according to claim 5, characterized in that, A vertical block (53) is fixed at the top right end of the horizontal section of the inverted U-shaped frame (3). A threaded post (531) is installed on the vertical block (53) by means of threaded engagement. The left end of the threaded post (531) is rotatably installed on the sliding frame plate (51) on the right side. A crank is fixed at the right end of the threaded post (531).

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