Labor-saving carton folding table for medium and large-sized cartons

Abstract

The utility model discloses a labor -saving folding box platform for medium -large -size carton relates to carton processing technical field, the utility model discloses a rack is connected with the platform on the top of rack, and the both sides of rack are connected with two guide rods and two guide frames, and four pulleys are connected on the upper side of one side of two guide rods, and four locating seats, four buffer pads, two roller frames and two hoops are respectively sleeved on the outside of two guide rods, and the outer surface of two roller frames is connected with adjustable pressure frame through support, the utility model discloses the setting of guide rod, locating seat, buffer pad, roller frame, support and adjustable pressure frame, the folding box fixture of like 630*600 specification is placed on the platform, then can be through the lower pull of holding support or adjustable pressure frame, makes adjustable pressure frame bottom and carton adhere to and adds the pressure of pressing down to carton, to press into folding box fixture with carton, makes the folding box operation of the folding of carton four around, and the size of adjustable pressure frame is far greater than the hand of person, and the folding of carton of medium -large -size specification is convenient.

Description

Technical Field

[0001] This utility model relates to the field of cardboard box processing technology, specifically a labor-saving folding table for medium and large-sized cardboard boxes. Background Technology

[0002] Cardboard boxes are packaging containers widely used for the storage, transportation, and sale of goods. They are typically made from foldable paper materials such as corrugated cardboard and cardboard, and are characterized by their lightweight, low cost, recyclability, and good cushioning and protection. Based on the usage scenario and the size of the packaged items, cardboard boxes can be divided into three categories: small, medium, and large. Medium and large-sized cardboard boxes (such as those suitable for large items like home appliances, furniture, and industrial parts) have a large unfolded surface area and a large three-dimensional volume after forming. During processing, the flat cardboard needs to be folded into a three-dimensional box, which is a crucial preliminary step to ensure the smooth progress of subsequent sealing operations.

[0003] Folding jigs are specialized tools that help cardboard boxes complete the folding process. Their core function is to replace or assist manual operation, reduce human error during the folding process, and improve the efficiency and precision of cardboard box forming.

[0004] Existing technologies for folding cartons using folding fixtures are generally mainly designed for small cartons. When dealing with medium to large cartons, such as those around 630*600 mm, the size of an adult's palm is much smaller than that of the cartons. Therefore, when pressing the cartons into the folding fixture with the palm, the pressure distribution is uneven. The area where the worker's palm is pressing down experiences greater pressure, while the area further away from the palm experiences less pressure. This increases the resistance as the cartons enter the folding fixture and can easily lead to uncontrollable deformation of the cartons, thus affecting the appearance quality of the folded cartons. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a labor-saving folding table for medium and large-sized cardboard boxes to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a labor-saving folding table for medium and large-sized cartons, comprising a frame, a table plate connected to the top of the frame, two guide rods and two guide frames connected to both sides of the frame, and four pulleys connected above one side of each of the two guide rods. Four positioning seats, four buffer pads, two roller frames, and two clamps are respectively fitted onto the outside of the two guide rods. An adjustable pressure frame is connected to the outer surface of each of the two roller frames via a bracket. A retaining sleeve is connected to one side of each of the two clamps via a support plate. A sealing plate is fitted onto the outside of each of the two guide frames. A counterweight frame is connected between the two guide frames, and a steel cable is connected between the counterweight frame and the bracket. Two buffer pads are connected to both sides of the back of the frame.

[0007] By adopting the above technical solution, a complete support and transmission architecture for the folding table can be constructed. The table serves as the basic load-bearing structure, and its top plate can stably place the folding fixture and the medium-to-large-sized cartons to be processed. The guide rods on both sides provide installation and movement guidance for the roller frame and clamps, while the guide frame provides sliding support for the counterweight frame. The pulleys, steel cables, and counterweight frame work together to form a labor-saving transmission system. The positioning seat and buffer pad can respectively realize component positioning and collision protection. The clamps, support plates, and clamps assist in the position adjustment of the adjustable pressure frame. The overall structure provides a hardware foundation for the subsequent labor-saving and precise folding operation.

[0008] Furthermore, the adjustable pressure frame is located above the platform.

[0009] By adopting the above technical solution, it can be ensured that the adjustable pressure frame has the space to apply downward pressure. When the carton on the folding table needs to be folded, the adjustable pressure frame can fit against the surface of the carton from top to bottom, and press the carton smoothly into the folding fixture on the table, so that the carton can be folded along the fixture track and formed, avoiding the problem that the adjustable pressure frame cannot effectively act on the carton due to improper position.

[0010] Furthermore, the roller frame is slidably connected to the guide rod via built-in rollers, and the roller frame abuts against four buffer pads on the outside of the guide rod.

[0011] By adopting the above technical solution, the built-in roller can significantly reduce the sliding friction resistance between the roller frame and the guide rod, enabling the roller frame to drive the bracket and adjustable pressure frame to move smoothly up and down along the guide rod, reducing the force required for manual drive; when the roller frame moves to the limit position on the guide rod, it abuts against the buffer pad, which can absorb the impact kinetic energy of the roller frame, avoiding damage caused by direct collision between the roller frame and the positioning seat or the end of the guide rod, and extending the service life of the component.

[0012] Furthermore, the counterweight frame is slidably connected to the guide frame via external rollers, and the counterweight frame abuts against two buffer pads on both sides of the back of the platform.

[0013] By adopting the above technical solution, the external rollers can keep the counterweight frame sliding smoothly in the vertical direction along the guide frame, ensuring that the tension of the steel cable on the support is stable and controllable. When the counterweight frame moves down to the limit position, it comes into contact with the buffer pad on the back of the platform, which can effectively buffer the impact force of the counterweight frame falling, prevent it from directly colliding with the platform and causing structural deformation, and ensure the stability of equipment operation.

[0014] Furthermore, the steel cable is connected to the pulley.

[0015] By adopting the above technical solution, the pulley can change the direction of force on the steel cable, so that the weight of the counterweight frame can be converted into the power to pull the support and the adjustable pressure frame back to their original positions through the steel cable. After the box is folded, there is no need to manually lift the adjustable pressure frame. The weight of the counterweight frame can drive the adjustable pressure frame to move up and back to its original position automatically through the cooperation of the steel cable and the pulley. At the same time, the pulley can also reduce the friction loss during the movement of the steel cable, improve the transmission efficiency, and further enhance the labor-saving effect of the equipment.

[0016] Furthermore, the clamp is rotatably connected to the guide rod, and both the top and bottom of the clamp abut against the positioning seat.

[0017] By adopting the above technical solution, the top and bottom of the clamp abut against the positioning seat. The positioning seat can restrict the movement of the clamp along the axial direction of the guide rod, ensuring that the clamp is fixed in a stable position on the bracket, avoiding the bracket from shaking due to clamp displacement during the pressure application process, and ensuring the accuracy of pressure application when folding the box.

[0018] Furthermore, the sleeve has a "C"-shaped longitudinal section, and the sleeve is detachably connected to the bracket.

[0019] By adopting the above technical solution, the C-shaped longitudinal section design gives the ferrule an open structure, which facilitates the quick insertion or removal of the bracket from the ferrule and simplifies the docking operation between the bracket and the ferrule.

[0020] Furthermore, the outer surface of the card sleeve is sloped both above and below.

[0021] By adopting the above technical solution, the sloping outer surface can play a guiding role when the bracket and the ferrule are docked. When the bracket moves up and down to align with the ferrule, the slope can guide the bracket to slide smoothly into the opening of the ferrule. There is no need for manual fine adjustment of the position of the bracket and the ferrule, which reduces the time cost of alignment operation and improves the efficiency of adjusting the position of the adjustable pressure frame.

[0022] Furthermore, four casters are connected to both sides of the bottom of the platform, and the four casters are distributed in a rectangular array.

[0023] By adopting the above technical solutions, the casters enable the folding platform to move flexibly as a whole, allowing staff to adjust the position of the folding platform according to the workstation layout on the production site without the need for external hoisting equipment. The rectangular array of casters ensures that the bottom of the platform is evenly stressed, preventing the folding platform from tilting due to imbalance of forces when moving or stationary, thus ensuring the stability of the equipment during movement and use.

[0024] Furthermore, the platform, guide rod, bracket, adjustable pressure frame, guide frame and counterweight frame are all assembled from thick-base aluminum alloy bars and standard aluminum alloy bar connectors, and the positioning seat, roller frame and pulley are all functional accessories of aluminum alloy bars.

[0025] By adopting the above technical solutions, the thick-base aluminum alloy bar combines lightweight and high strength characteristics, which can reduce the overall weight of the folding table and withstand the pressure and weight of the components when folding medium and large-sized cartons, ensuring the structural strength of the equipment. Standard connectors and matching functional accessories make the assembly, disassembly and replacement of each component more convenient, and the equipment structure can be quickly adjusted according to actual needs. At the same time, the aluminum alloy material has good corrosion resistance, which can extend the service life of the equipment in the workshop environment.

[0026] In summary, the present invention has the following main advantages: 1. This utility model, through the arrangement of guide rods, positioning seats, buffer pads, roller frames, supports, and adjustable pressure frames, places a folding jig, such as a 630*600mm box, on a platform. Then, by grasping the support or pulling down the adjustable pressure frame, the bottom of the adjustable pressure frame is brought into contact with the box, applying downward pressure to press the box into the folding jig, thus completing the folding operation by folding the box upwards on all four sides. During the downward movement of the support, the roller frame is guided by its displacement on the guide rod, preventing the support and adjustable pressure frame from shifting. Furthermore, the positioning seat limits the movement space of the roller frame during its vertical movement, and the buffer pad reduces collision damage when the roller frame reaches its movement limit. The adjustable pressure frame can be adjusted according to different box sizes and folding jig sizes during actual use, reducing limitations in usage. The size of the adjustable pressure frame is much larger than a human hand, facilitating the folding of medium to large-sized boxes. 2. This utility model, through the arrangement of a guide frame, counterweight frame, steel cable, pulleys, and buffer pad, uses a counterweight frame whose weight is slightly greater than the combined weight of the support frame and adjustable pressure frame. Firstly, when the operator moves the support frame or adjustable pressure frame up and down, the weight on both sides of the pulley is similar, saving effort; the operator only needs to apply a small amount of force to drive the support frame and adjustable pressure frame up and down. Secondly, when the operator releases the support frame and adjustable pressure frame, because the counterweight is slightly heavier, it will move downwards due to gravity. After the counterweight moves downwards, it pulls the support frame upwards via the steel cable, automatically completing the reset of the support frame and adjustable pressure frame. This eliminates the need for the operator to manually reset the adjustable pressure frame after folding the box. During this process, the guide frame guides the counterweight frame, ensuring it can only move up and down, and the buffer pad reduces collision damage after the counterweight frame moves downwards. It also facilitates automatic resetting of the adjustable pressure frame, making operation easier. 3. This utility model, through the design of the clamp, support plate, and clamp, allows the operator to lower the bracket and adjustable pressure frame when adjustment is needed, aligning the bracket and clamp horizontally. This lowers the adjustable pressure frame to a lower position, making it easier to adjust by placing it closer to the carton or folding fixture used as a reference. Once the clamp and bracket are horizontally aligned, the operator can rotate the clamp or pull the clamp to rotate it, allowing the clamp to fit over the top, bottom, and one side of the bracket, preventing the bracket and adjustable pressure frame from moving up and down. This avoids the adjustable bracket's random vertical displacement affecting the operator's work during adjustment, and makes it convenient to use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the back structure of this utility model; Figure 3 This is a schematic diagram of the guide frame structure of this utility model; Figure 4 This is a schematic diagram of the support structure of this utility model; Figure 5 This is a schematic diagram of the adjustable pressure frame structure of this utility model; Figure 6 This is a schematic diagram of the card sleeve structure of this utility model.

[0028] In the diagram: 1. Frame; 2. Platform; 3. Casters; 4. Guide rod; 5. Positioning seat; 6. Buffer pad; 7. Roller frame; 8. Bracket; 9. Adjustable pressure frame; 10. Sealing plate; 11. Guide frame; 12. Counterweight frame; 13. Steel cable; 14. Pulley; 15. Clamp; 16. Support plate; 17. Sleeve. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of this utility model will be described below based on its overall structure.

[0031] Example 1: A type of labor-saving folding table for medium and large-sized cardboard boxes, such as Figures 1-5As shown, the fixture includes a frame 1, with a platform 2 connected to the top of the frame 1. Two guide rods 4 and two guide frames 11 are connected to both sides of the frame 1. Four pulleys 14 are connected to the upper side of one side of each guide rod 4. Four positioning seats 5, four buffer pads 6, and two roller frames 7 are respectively fitted onto the outside of each guide rod 4. The roller frames 7 are slidably connected to the guide rods 4 via built-in rollers. The roller frames 7 abut against the four buffer pads 6 on the outside of the guide rods 4. Adjustable pressure frames 9 are connected to the outer surfaces of the two roller frames 7 via brackets 8, and the adjustable pressure frames 9 are located above the platform 2. The worker first places the cardboard box to be folded on top of the folding fixture. Then, the staff can grasp the bracket 8 or the adjustable pressure frame 9 and apply downward force. At this time, the roller frame 7 will slide along the guide rod 4 through the built-in rollers. The guide rod 4 provides vertical movement guidance for the roller frame 7, effectively preventing the bracket 8 and the adjustable pressure frame 9 from shifting during movement. At the same time, the vertical movement space of the roller frame 7 is limited by the positioning seat 5 on the guide rod 4 to prevent it from sliding beyond its range. When the roller frame 7 moves to its limit position, it will abut against the buffer pad 6 on the guide rod 4. The buffer pad 6 absorbs the impact force of the collision and reduces the collision damage between the roller frame 7 and the positioning seat 5. As the adjustable pressure frame 9 holds... As it continues to move downwards, its bottom will adhere to the top of the cardboard board, applying uniform downward pressure to the cardboard board and smoothly pressing it into the folding fixture below. This causes the cardboard board to fold upwards along the pre-set trajectory of the fixture, completing the forming operation of the three-dimensional box. Two guide frames 11 are fitted with sealing plates 10, and a counterweight frame 12 is connected between the two guide frames 11. The counterweight frame 12 is slidably connected to the guide frames 11 via external rollers. A steel cable 13 is connected between the counterweight frame 12 and the support 8, and the steel cable 13 is connected to the pulley 14. Two buffer pads 6 are connected to both sides of the back of the platform 1. Two buffer pads 6 abut against each other, and the support 8 pulls the counterweight frame 12 upward through the steel cable 13, and changes the direction of force transmission of the steel cable 13 through the pulley 14. The counterweight frame 12 slides along the guide frame 11 through the external roller. The guide frame 11 provides vertical guidance for the counterweight frame 12 to prevent the counterweight frame 12 from deviating. Since the weight of the counterweight frame 12 is slightly heavier than the combined weight of the support 8 and the adjustable pressure frame 9, the force on both sides of the pulley 14 tends to be balanced. The operator only needs to apply a small force to drive the support 8 and the adjustable pressure frame 9 downward, which significantly reduces the operation intensity and achieves the effect of saving effort.

[0032] See Figure 1 and Figure 2 In the above embodiment, four casters are connected to the bottom sides of the frame 1. The four casters are arranged in a rectangular array. The four casters 3 on the bottom sides of the frame 1 are also arranged in a rectangular array. When it is necessary to adjust the overall position of the folding table to adapt to different processing scenarios, the frame 1 can be pushed directly. The casters 3 enable the folding table to move flexibly, improving the flexibility of equipment use. Two casters 3 are equipped with brakes and the other two casters 3 are not equipped with brakes, which facilitates braking and limiting after adjusting the position of the frame 1.

[0033] Example 2: Based on the above embodiment 1, the adjustable pressure frame 9 is now configured as follows to facilitate adjustment.

[0034] See Figure 1 , Figure 2 , Figure 5 and Figure 6 In the above embodiment, two clamps 15 are respectively sleeved on the outside of the two guide rods 4. The clamps 15 are rotatably connected to the guide rods 4. The top and bottom of the clamps 15 abut against the positioning seats 5. Each of the two clamps 15 is connected to a ferrule 17 through a support plate 16 on one side. The longitudinal section of the ferrule 17 is "C" shaped. The upper and lower surfaces of the outer surface of the ferrule 17 are sloped. The ferrule 17 is detachably connected to the bracket 8. If it is necessary to adjust the adjustable pressure frame 9 to accurately fit the folding jig or carton size, the worker can first grasp the bracket 8 or the adjustable pressure frame 9 and move it downwards to keep the ferrule 17 connected to the support plate 16 horizontal. The longitudinal section of the 7th section is C-shaped and the outer surface is sloping at the top and bottom, which reduces the difficulty of aligning the bracket 8 and the sleeve 17. At the same time, the clamp 15 can rotate around the guide rod 4. After the bracket 8 and the sleeve 17 are aligned, the operator can rotate the clamp 15 or pull the sleeve 17 so that the sleeve 17 can fit over the top, bottom and one side of the bracket 8. The top and bottom of the clamp 15 are in contact with the positioning seat 5 on the guide rod 4. The positioning seat 5 restricts the axial displacement of the clamp 15, thereby fixing the bracket 8 and the adjustable pressure frame 9, preventing them from moving up and down randomly during the adjustment process, ensuring that the height and position of the adjustable pressure frame 9 are accurately adjusted to meet the needs of carton folding.

[0035] Example 3: Based on the above embodiment one, the following settings are now implemented to facilitate production and maintenance.

[0036] See Figures 1-5 In the above embodiments, the platform 1, guide rod 4, bracket 8, adjustable pressure frame 9, guide frame 11 and counterweight frame 12 are all assembled from thick-base aluminum alloy rods and standard aluminum alloy rod connectors. The positioning seat 5, roller frame 7 and pulley 14 are all functional accessories of aluminum alloy rods. The raw materials are simple and are standard products. There is no need for independent mold opening, etc. They can be directly purchased in large or small batches from the market for self-assembly. If the subsequent parts are damaged, the damaged parts can also be purchased separately for replacement. The assembly cost, maintenance cost and difficulty are all low.

[0037] The implementation principle of this utility model is as follows: First, the worker places the appropriate folding jig on the top of the table 2 according to the specifications of the medium and large-sized cardboard boxes to be processed. If it is necessary to adjust the adjustable pressure frame 9 to accurately fit the folding jig or the size of the cardboard box, the worker can first grasp the bracket 8 or the adjustable pressure frame 9 and move it downwards so that the clamp 17 connecting the bracket 8 and the support plate 16 is kept horizontal. Because the longitudinal section of the clamp 17 is C-shaped and the outer surface is sloping, it can reduce the difficulty of aligning the bracket 8 and the clamp 17. At the same time, the clamp 15 can rotate around the guide rod 4. After the bracket 8 and the clamp 17 are aligned, the worker rotates the clamp 15 or pulls the clamp 17 so that the clamp 17 can fit the top, bottom and one side of the bracket 8, and the top and bottom of the clamp 15 are aligned with the fixed position on the guide rod 4. The base 5 abuts against the clamp 15, thereby limiting the axial displacement of the clamp 15 and fixing the bracket 8 and the adjustable pressure frame 9. This prevents the two from moving up and down arbitrarily during adjustment, ensuring that the height and position of the adjustable pressure frame 9 are accurately adjusted to meet the needs of carton folding. Since the adjustable bracket 8 is assembled from thick base aluminum alloy bars and standard connectors for the aluminum alloy bars, the operator can loosen the bolts on the standard connectors to lock the thick base aluminum alloy bars. Then, the operator can slide the thick base aluminum alloy bars to adjust the spacing and position of the two single-sided thick base aluminum alloy bars at the bottom of the adjustable pressure frame 9. After adjustment, the operator re-tightens the standard connectors with bolts and reverses the clamp 15 to release the clamp 17 from fixing the bracket 8. During the folding operation, the worker first places the cardboard box to be folded on top of the folding fixture. Then, the worker can grasp the bracket 8 or the adjustable pressure frame 9 and apply downward force. At this time, the roller frame 7 will slide along the guide rod 4 through the built-in rollers. The guide rod 4 provides vertical movement guidance for the roller frame 7, effectively preventing the bracket 8 and the adjustable pressure frame 9 from shifting during movement. At the same time, the vertical movement space of the roller frame 7 is limited by the positioning seat 5 on the guide rod 4 to prevent it from sliding beyond its range. When the roller frame 7 moves to its limit position, it will abut against the buffer pad 6 on the guide rod 4. The buffer pad 6 absorbs the impact force of the collision and reduces the collision damage between the roller frame 7 and the positioning seat 5. As the adjustable pressure frame 9 continues to move downward, its bottom will fit against the top of the cardboard box and apply uniform downward pressure to the cardboard box, pressing the cardboard box smoothly into the folding fixture below, causing the cardboard box to fold upward along the preset trajectory of the fixture, completing the forming operation of the three-dimensional box. During this process, the support 8 pulls the counterweight frame 12 upward via the steel cable 13, and changes the direction of force transmission of the steel cable 13 via the pulley 14. The counterweight frame 12 slides along the guide frame 11 via the external rollers. The guide frame 11 provides vertical guidance for the counterweight frame 12 to prevent it from shifting. Since the weight of the counterweight frame 12 is slightly greater than the combined weight of the support 8 and the adjustable pressure frame 9, the forces on both sides of the pulley 14 tend to be balanced. The operator only needs to apply a small force to drive the support 8 and the adjustable pressure frame 9 downward, significantly reducing the intensity of operation and achieving a labor-saving effect. It should be noted that the labor-saving effect refers to the reduced effort required when moving the adjustable support 8 up and down, not when pressing down the cardboard. When pressing down the cardboard, the operator still needs to apply a large force to overcome the resistance of the cardboard itself to cause deformation and fold the cardboard up on all sides. After the box folding operation is completed, the staff releases the support 8 or the adjustable pressure frame 9. At this time, the counterweight frame 12, because its own weight is slightly greater than the combined weight of the support 8 and the adjustable pressure frame 9, will slide down naturally along the guide frame 11. The support 8 and the adjustable pressure frame 9 will be pulled up synchronously by the steel cable 13, eliminating the need for manual lifting and resetting, thus further improving the efficiency of operation. At the same time, the buffer pads 6 on both sides of the back of the platform 1 will abut against the counterweight frame 12 when it is lowered to the extreme position, absorbing the impact force of the counterweight frame 12 and preventing the counterweight frame 12 from directly colliding with the platform 1 and causing damage. In addition, the four casters 3 on both sides of the bottom of the frame 1 are arranged in a rectangular array. When it is necessary to adjust the overall position of the folding table to adapt to different processing scenarios, the frame 1 can be pushed directly, and the casters 3 can be used to move the folding table flexibly, improving the flexibility of equipment use. Two casters 3 are equipped with brakes and the other two casters 3 are not equipped with brakes, which makes it easy to brake and limit the position after adjusting the position of the frame 1.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A labor-saving folding table for medium and large-sized cardboard boxes, comprising a table frame (1), characterized in that: The top of the platform (1) is connected to a platform plate (2). The two sides of the platform (1) are connected to two guide rods (4) and two guide frames (11). Four pulleys (14) are connected above one side of the two guide rods (4). Four positioning seats (5), four buffer pads (6), two roller frames (7) and two clamps (15) are respectively sleeved on the outside of the two guide rods (4). An adjustable pressure frame (9) is connected to the outer surface of the two roller frames (7) through a bracket (8). A clamp (17) is connected to one side of each of the two clamps (15) through a support plate (16). A sealing plate (10) is sleeved on the outside of the two guide frames (11). A counterweight frame (12) is connected between the two guide frames (11). A steel cable (13) is connected between the counterweight frame (12) and the bracket (8). Two buffer pads (6) are connected to the two sides of the back of the platform (1).

2. The labor-saving folding table for medium and large-sized cartons according to claim 1, characterized in that: The adjustable pressure frame (9) is located above the platform (2).

3. The labor-saving folding table for medium and large-sized cartons according to claim 1, characterized in that: The roller frame (7) is slidably connected to the guide rod (4) through built-in rollers, and the roller frame (7) abuts against the four buffer pads (6) outside the guide rod (4).

4. The labor-saving folding table for medium and large-sized cartons according to claim 1, characterized in that: The counterweight frame (12) is slidably connected to the guide frame (11) via external rollers, and the counterweight frame (12) abuts against the two buffer pads (6) on both sides of the back of the platform (1).

5. The labor-saving folding table for medium and large-sized cartons according to claim 1, characterized in that: The steel cable (13) is connected to the pulley (14).

6. The labor-saving folding table for medium and large-sized cartons according to claim 1, characterized in that: The clamp (15) is rotatably connected to the guide rod (4), and the top and bottom of the clamp (15) abut against the positioning seat (5).

7. The labor-saving folding table for medium and large-sized cartons according to claim 1, characterized in that: The sleeve (17) has a "C" shaped longitudinal section, and the sleeve (17) is detachably connected to the bracket (8).

8. The labor-saving folding table for medium and large-sized cartons according to claim 7, characterized in that: The outer surface of the sleeve (17) is sloped both above and below.

9. The labor-saving folding table for medium and large-sized cartons according to claim 1, characterized in that: The bottom of the platform (1) is connected to four casters on both sides, and the four casters are distributed in a rectangular array.

10. The labor-saving folding table for medium and large-sized cartons according to claim 5, characterized in that: The platform (1), guide rod (4), bracket (8), adjustable pressure frame (9), guide frame (11) and counterweight frame (12) are all assembled from thick-base aluminum alloy bars and standard aluminum alloy bar connectors, and the positioning seat (5), roller frame (7) and pulley (14) are all functional accessories of aluminum alloy bars.

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