Stacking device for mattresses

Abstract

The utility model relates to a stacking device for mattresses. The falling height of mattresses of an existing stacking device is large, and the use experience is affected. The mattress stacking device comprises a rack, a receiving mechanism is arranged at the top of the rack, a lifting mechanism for lifting a stack is arranged in the rack, a mattress is received by the receiving mechanism and falls and is stacked at the top of the stack, the height of the stack is adjusted through the lifting mechanism, and the height difference between the top face of the stack and the receiving mechanism is reduced. Therefore, the falling distance of the mattress from the receiving mechanism to the top of the stack is reduced. The receiving mechanism and the lifting mechanism are arranged in the rack, the lifting mechanism adjusts the height of the stack and effectively reduces the height difference between the top face of the stack and a mattress at the position of the receiving mechanism, the height of the mattress falling to the top of the stack is effectively reduced, the effect of protecting the mattress is achieved, it is ensured that the mattress can be stacked on the stack in order, and the use experience is improved; and the occupied area of the stacking device can be effectively reduced, and using and transferring are convenient.

Description

Technical Field

[0001] This utility model relates to the field of mattress manufacturing, specifically to a stacking device. Background Technology

[0002] The existing stacking equipment includes separate lifting and stacking stations, which are arranged adjacent to each other. In use, the mattress is first transferred to a support platform within the lifting station. Then, the support platform lifts the mattress to the top of the stack within the stacking station. Finally, the stacking station transfers the mattress from the support platform to the top of the stack. The lifting height of the support platform changes synchronously with the height of the top of the stack, ensuring the mattress is accurately stacked to the top. The vertical projection of both the lifting and stacking stations can completely cover a single mattress, resulting in a large footprint for the stacking equipment. This makes it inconvenient for use in space-constrained warehouses and also hinders equipment relocation within the warehouse.

[0003] Therefore, by conveying the mattress to the top of the stacking station at a constant height, the purpose of the lifting station can be eliminated. When the stacking height is low, there is a greater height difference between the top of the stacking station and the top of the stack. The mattress will be impacted due to the excessive falling distance, which can easily cause the mattress to break. It can also cause the mattress to shift due to vibration and not be stacked accurately, affecting the user experience. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a mattress stacking device. A receiving mechanism and a lifting mechanism are set inside the frame. The lifting mechanism adjusts the stacking height and effectively reduces the height difference between the top surface of the stack and the mattress at the receiving mechanism, thereby reducing the height from which the mattress falls to the top of the stack. This not only protects the mattress but also ensures that the mattresses can be neatly stacked on the stack, improving the user experience.

[0005] This utility model is achieved through the following method: a mattress stacking device, including a frame, a receiving mechanism at the top of the frame, and a lifting mechanism inside the frame for raising the mattress. The mattress is received by the receiving mechanism and falls onto the top of the stack. The lifting mechanism adjusts the stack height and reduces the height difference between the top of the stack and the receiving mechanism, thereby reducing the fall distance of the mattress from the receiving mechanism to the top of the stack. By setting the receiving mechanism and lifting mechanism inside the frame, the lifting mechanism adjusts the stack height and effectively reduces the height difference between the top of the stack and the mattress at the receiving mechanism. This effectively reduces the height from which the mattress falls to the top of the stack, protecting the mattress, ensuring that the mattresses are neatly stacked on the stack, improving the user experience, and effectively reducing the footprint of the stacking device, making it convenient to use and move.

[0006] Preferably, the receiving mechanism includes a ring-shaped built-in conveyor belt and a limiting plate. The built-in conveyor belt includes two symmetrically arranged transfer chains, each with a support section. The built-in conveyor belt receives mattresses through the support sections and, when moving above the stack, is stopped by the limiting plate, causing the mattresses to move away from the support sections and fall from the transfer chains to the top of the stack. The built-in conveyor belt receives mattresses transported to the top of the rack. When the mattresses move above the stack, the limiting plate causes them to fall downwards and be neatly stacked on top of the stack. The built-in conveyor belt includes transfer chains with support sections. The transfer chains rotate and adjust the position of the support sections, which not only serve the purpose of receiving and transferring mattresses but also allow the support sections, in conjunction with the limiting plate, to move the mattresses away from the support sections and cause them to fall to the top of the stack.

[0007] Preferably, the frame is equipped with transfer gears, and the transfer chains are parallel to each other and wound around corresponding transfer gears. The transfer chains are connected by belts, support plates, or rollers to form support sections. The transfer gears not only drive the transfer chains to move the support areas but also shape the chains, ensuring they are laid and run along a predetermined path. The support sections can utilize various structures to achieve the support function, including but not limited to belts, support plates, or rollers, to stably support the mattress.

[0008] Preferably, the distance between the transfer chains is greater than the width of the mattress, so that the mattress can pass through the transfer chains horizontally and fall to the top of the stack. The transfer chains are positioned by transfer gears, so that adjacent transfer chains form a channel that is offset from the support section and allows the mattress to pass through and fall, facilitating the mattress's fall to the top of the stack. The width of the channel is determined by the distance between the transfer chains; by increasing the channel width, the requirement for the mattress to pass through horizontally is met, ensuring that the mattress can be neatly stacked on top of the stack.

[0009] Preferably, the frame includes a receiving cavity for stacking and lifting. The transfer chain is L-shaped, including a horizontal section above the receiving cavity and a vertical section on the side of the receiving cavity. The transfer gear drives the transfer chain, allowing the supporting section to switch back and forth between the horizontal and vertical sections. The receiving cavity is a vertical column, and its horizontal cross-section's vertical projection area can completely accommodate the mattress, allowing the stack formed by the mattresses to move freely up and down within the receiving cavity. The vertical section is located on the side of the receiving cavity, and the supporting section moves to the vertical section, forming a channel for the mattresses to pass through in the horizontal section.

[0010] Preferably, the transfer gear includes a drive wheel located at one end of the top of the frame, a steering wheel at the same height as the drive wheel, and a limiting wheel located below the steering wheel. The section of the built-in conveyor belt between the drive wheel and the steering wheel forms the horizontal section, and the section of the built-in conveyor belt between the steering wheel and the limiting wheel forms the vertical section. The drive wheel, steering wheel, and limiting wheel limit the transfer chain, keeping the transfer chain in an L-shape and forming the vertical and horizontal sections. This allows the supporting section to avoid the horizontal section by transferring to the vertical section, thus creating a channel for the mattress to pass through the horizontal section.

[0011] Preferably, the receiving mechanism includes an external conveyor belt that is level with the horizontal section. The limiting plate is positioned above the horizontal section near the end of the external conveyor belt. The limiting plate can switch between a vertical blocking position and a raised avoidance position. Mattresses located on the support section are blocked by the limiting plate at the blocking position and fall from the support section to the stack. The external conveyor belt has a fixed height and is flush with the horizontal section at the top of the frame. Mattresses transported by the external conveyor belt are received by the support section on the internal conveyor belt and transferred to the top of the stack. The limiting plate, switched to the blocking position, acts as a resisting and limiting force on the mattress, allowing the support section to slide relative to the mattress as the transfer chain runs. This facilitates the mattress avoiding the support section and falling through the channel to the top of the stack, completing the stacking operation.

[0012] Preferably, the frame is cuboid in shape, including at least four separately positioned columns. The lifting mechanism includes a lifting chain assembly, a drive unit, and a support platform disposed between the columns. The drive unit drives the support platform to rise and fall via the lifting chain assembly. The lifting chain assembly includes four axles arranged in a matrix and parallel to each other at the four corners of the frame, and large and small ring chains respectively fixed to the two side edges of the frame. The large ring chains are wound around the four axles, and the small ring chains are wound around the two axles located on the same side of the frame. The drive unit drives the large and small ring chains to run synchronously via the axles and controls the support platform to rise and fall in a horizontal posture. The columns support the frame, improving its resistance to deformation and support strength. The drive unit drives the support platform to adjust the stacking height via the lifting chain assembly, effectively reducing the height difference between the top surface of the stack and the horizontal part, thereby effectively reducing the fall height of the mattress. The lifting chain assembly includes four axles arranged in a matrix and parallel to each other at the four corners of the frame, as well as large and small ring chains fixed to the two side edges of the frame. The large ring chains are wrapped around the four axles at the four corners of the frame, and the small ring chains are wrapped around the two axles on the same side of the frame. The large and small ring chains share two axles, so that the large and small ring chains can be driven simultaneously by the drive unit set on the shared axle. The large and small ring chains are fixed to the two side edges of the support platform, ensuring that the support platform is raised and lowered in a horizontal posture.

[0013] Preferably, the axle has gears at both ends for engagement with a large chain and a small chain. There are two sets of large and small chains, symmetrically arranged at both ends of the axle. The large and small chains are connected to a common axle via corresponding gears, allowing them to be driven by the shared axle. Each set of large and small chains is fixed to the two ends of the corresponding side edge of the support platform, ensuring even force distribution at the four corners of the support platform and improving its lifting stability.

[0014] Preferably, the column is provided with a guide rail, and the periphery of the support platform is provided with guide wheels. The guide wheels roll along the guide rail and guide the support platform to rise and fall in a horizontal posture, ensuring the stability and reliability of the support platform's lifting and lowering.

[0015] Preferably, the lifting mechanism includes a counterweight assembly, which comprises a counterweight frame and counterweight components mounted on the frame. Both the large and small ring chains are connected to the counterweight frame. A slide rail is provided on the column, and a slider that can slide along the slide rail is provided on the counterweight frame. The counterweight frame and the support platform are positioned on opposite sides of the small ring chain. The section of the small ring chain between the support platform and the counterweight frame has the same length. The counterweight frame and the support platform move in opposite directions when the small ring chain is in operation. By using the counterweight assembly, the weight of the stack is offset, thereby reducing the operating load on the drive unit. The counterweight assembly and the support platform are respectively positioned on opposite sides of the large and small ring chains on a common axle, allowing the counterweight assembly to use its own weight to offset the weight of the support platform and the stack on it. The slider slides along the slide rail, guiding and limiting the counterweight assembly to ensure it moves along a preset path. Both the large and small ring chains are connected to the counterweight frame, allowing the counterweight assembly to act simultaneously on both the small and large ring chains.

[0016] The beneficial effects of this utility model are as follows: A receiving mechanism and a lifting mechanism are installed within the frame. The lifting mechanism adjusts the stacking height and effectively reduces the height difference between the top of the stack and the mattress at the receiving mechanism. This effectively reduces the height from which the mattress falls to the top of the stack, protecting it. It also ensures that the mattresses are neatly stacked, improving the user experience. Furthermore, it effectively reduces the footprint of the stacking device, facilitating use and relocation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the stacking device.

[0018] Figure 2 This is a schematic diagram of the structure of the frame;

[0019] Figure 3 This is a schematic diagram of the receiving mechanism;

[0020] Figure 4 This is a schematic diagram of the lifting mechanism.

[0021] Figure 5 This is a cross-sectional structural diagram of the mattress being fed into the receiving mechanism via an external conveyor belt.

[0022] Figure 6 This is a cross-sectional structural diagram of the section supported by the mattress.

[0023] Figure 7 This is a cross-sectional view of the mattress as it falls to the top of the stack.

[0024] In the diagram: 1. Frame, 2. Lifting mechanism, 3. Stacking, 4. Receiving mechanism, 5. Built-in conveyor belt, 6. Support section, 7. Slider, 8. Limiting plate, 9. Transfer chain, 10. Drive wheel, 11. Steering wheel, 12. Limiting wheel, 13. External conveyor belt, 14. Column, 15. Supporting platform, 16. Drive unit, 17. Axle, 18. Large ring chain, 19. Small ring chain, 20. Guide rail, 21. Guide wheel, 22. Counterweight frame, 23. Slide rail. Detailed Implementation

[0025] The essential features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 and 2 A mattress stacking device is shown, comprising a frame 1 with a receiving mechanism 4 at its top and a lifting mechanism 2 inside the frame 1 for raising and stacking the mattresses 3. The mattresses are received by the receiving mechanism 4 and dropped onto the top of the stack 3. The lifting mechanism 2 adjusts the height of the stack 3 and reduces the height difference between the top surface of the stack 3 and the receiving mechanism 4, thereby reducing the fall distance of the mattresses from the receiving mechanism 4 to the top of the stack 3. By setting the receiving mechanism 4 and the lifting mechanism 2 inside the frame 1, the lifting mechanism adjusts the height of the stack 3 and effectively reduces the height difference between the top surface of the stack 3 and the mattresses at the receiving mechanism 4. This effectively reduces the height from which the mattresses fall to the top of the stack 3, protecting the mattresses, ensuring that the mattresses are neatly stacked on the stack 3, improving the user experience, and effectively reducing the footprint of the stacking device, making it convenient to use and move.

[0027] In actual operation, the mattresses are conveyed at a fixed height to the receiving mechanism 4 located at the top of the frame 1 via an external conveyor belt 13. The lifting mechanism 2 located inside the frame 1 drives the stack 3 to adjust its height, reducing the drop height of the mattresses by decreasing the height difference between the top surface of the stack 3 and the horizontal part of the receiving structure. The external conveyor belt 13 is set at a height greater than the upper limit of the stacking height of the stack 3, eliminating the need for the lifting station in the original stacking device, making it convenient to use and transfer. The lifting mechanism 2 built into the frame 1 can adjust the height of the stack 3, allowing mattresses with a preset height input to be transferred to the top of the stack 3 with a smaller drop height, protecting the mattresses and ensuring that all mattresses in the stack 3 are neatly stacked, facilitating storage and transportation.

[0028] In actual operation, the receiving mechanism 4 includes a built-in conveyor belt 5 in a ring shape and a limiting plate 8 (e.g., Figure 3 As shown in the diagram, the built-in conveyor belt 5 includes two symmetrically arranged transfer chains 9. Each transfer chain 9 has a support section 6. The built-in conveyor belt 5 receives the mattress through the support section 6 and, when moving above the stack 3, is stopped by a limiting plate 8, causing the mattress to move away from the support section 6 and fall from between the transfer chains 9 to the top of the stack 3. The length of the support section 6 is greater than the length of the mattress, ensuring that the bottom surface of the mattress can be completely supported by the support section 6.

[0029] In use, firstly, the external conveyor belt 13 receives the mattress and drives it to the horizontal part of the receiving mechanism 4 (e.g., Figure 5 (As shown); then, the limiting plate 8 is located at the avoidance station, the supporting section 6 is located at the top surface of the horizontal part, and the mattress is transferred from the external conveyor belt 13 to the top surface of the horizontal part so that the mattress is moved above the stack 3 (as shown). Figure 6 As shown), simultaneously, the support platform 15 adjusts its height according to the height of the top surface of the stack 3, reducing the height between the top surface of the stack 3 and the horizontal part to a preset value; then, the limit plate 8 switches to the blocking position, and the support section 6 moves away from the horizontal part under the drive of the transfer chain 9. The mattress will be misaligned and separated from the support section 6 due to the blocking of the limit plate 8, causing the mattress to fall to the top surface of the stack 3 after losing the support of the support section 6 (as shown). Figure 7 (as shown); Finally, repeat the above operations so that the mattresses are neatly stacked to form a stack 3 that meets the preset height requirements, and then move the entire stack 3 away to provide an empty stacking station for subsequent work.

[0030] In actual operation, the frame 1 is equipped with transfer gears, and the transfer chains 9 are parallel to each other and respectively wound around the corresponding transfer gears. The transfer chains 9 are connected by belts, support plates or rollers to form the support section 6 for supporting the mattress. The area of ​​the transfer chains 9 other than the support section 6 is empty, forming a channel through which the mattress can pass. In use, the support section 6 can switch between a horizontal support state and an idle state away from the horizontal state under the operation of the transfer chain 9. When the support section 6 is in the horizontal position, it can support the mattress. When the support section 6 leaves the horizontal position, a channel is formed in the horizontal position to facilitate the mattress falling to the top of the stack 3. Since the movement of the support section 6 away from the horizontal position is a process, one side of the mattress will fall before the other side. By reducing the falling distance of the mattress, it is ensured that the mattress always tends to be horizontal during the falling process. By reducing the tilt angle, it is ensured that the mattresses are stacked neatly.

[0031] In actual operation, the frame 1 has a receiving cavity for the stack 3 to be raised and lowered. The transfer chain 9 is L-shaped, including a horizontal part above the receiving cavity and a vertical part on the side of the receiving cavity. The transfer gear drives the transfer chain 9 to rotate, allowing the supporting section 6 to switch back and forth between the horizontal part and the vertical part. The vertical part is located on the side of the receiving cavity, which can effectively avoid the receiving cavity, ensure the normal raising and lowering adjustment of the stack 3, and also hide the supporting section, so that the mattress can smoothly pass through the horizontal part and fall to the top of the stack 3.

[0032] In actual operation, the distance between the transfer chains 9 is greater than the width of the mattress, so that the mattress can pass through the transfer chains 9 horizontally and fall to the top of the stack 3. Each transfer chain 9 includes a horizontally positioned high section and a low section at different heights in the horizontal section. When the receiving mechanism 4 receives the mattress, the supporting section 6 is located in the high section of the horizontal section. The top surface of the stack 3 can be driven by the supporting platform 15 to pass through the space between the low sections and move below the high section, reducing the height difference between the top surface of the stack 3 and the supporting section 6, thus reducing the tilt angle of the mattress when it falls. When the supporting section 6 moves away from the horizontal section, it moves towards the limiting plate 8 and hides inside the vertical section, leaving the space between the high sections empty and forming a channel for the mattress to fall.

[0033] In actual operation, the transfer gear includes a drive wheel 10 located at one end of the top of the frame 1, a steering wheel 11 at the same height as the drive wheel 10, and a limiting wheel 12 located below the steering wheel 11. The section of the built-in conveyor belt 5 between the drive wheel 10 and the steering wheel 11 forms the horizontal section, and the section of the built-in conveyor belt 5 between the steering wheel 11 and the limiting wheel 12 forms the vertical section. The drive wheel 10, the steering wheel 11, and the limiting wheel 12 position the transfer chain 9, ensuring that the transfer chain 9 always maintains an L-shape. The drive wheel 10 also provides running power to the transfer chain 9, driving the support section 6 to move, which not only supports the mattress but also forms a channel for the mattress to fall in the horizontal section.

[0034] In actual operation, the receiving mechanism 4 includes an external conveyor belt 13 that is connected at the same height as the horizontal section. The external conveyor belt 13 can operate independently and is used to transfer mattresses. The outlet end of the external conveyor belt 13 is connected at the same height as the horizontal section, and the position of the inlet end can be adjusted as needed to facilitate the collection of mattresses scattered in various places. The external conveyor belt 13 plays the role of lifting, transferring and collecting mattresses.

[0035] In actual operation, the limiting plate 8 is positioned above the horizontal section near the end of the external conveyor belt 13. The limiting plate 8 can switch between a vertical blocking position and a raised clearance position. The mattress located on the support section 6 is blocked by the limiting plate 8 in the blocking position and falls from the support section 6 to the stack 3. The top of the limiting plate 8 is rotatably connected to the frame 1, allowing the limiting plate 8 to swing and switch between the blocking position and the clearance position.

[0036] In actual operation, the frame 1 is rectangular and includes at least four separately positioned columns 14. The lifting mechanism 2 includes a lifting chain assembly, a drive unit 16, and a support platform 15 disposed between the columns 14 (e.g., Figure 4 As shown, the drive unit 16 drives the support platform 15 to rise and fall via a lifting chain assembly. The lifting chain assembly includes four axles 17 arranged in a matrix and parallel to each other at the four corners of the frame 1, and large ring chains 18 and small ring chains 19 fixed to the two side edges of the support platform 15 respectively. The large ring chains 18 are wound around the four axles 17, and the small ring chains 19 are wound around the two axles 17 located on the same side of the frame 1. The drive unit 16 drives the large ring chains 18 and small ring chains 19 synchronously via the axles 17 and controls the support platform 15 to rise and fall in a horizontal posture. The drive unit 16 is located on the axles 17 shared by the large ring chains 18 and small ring chains 19, and drives the large ring chains 18 and small ring chains 19 synchronously via corresponding gears, so that the support platform 15 can rise and fall smoothly in a horizontal posture.

[0037] In actual operation, the large ring chain 18 and the small ring chain 19 are arranged in two sets symmetrically on both ends of the axle 17. The axle 17 has gears at both ends for the large ring chain 18 and the small ring chain 19 to engage, thus shaping and guiding their operation. The gears and their corresponding axles 17 rotate synchronously via a key-pin structure, ensuring synchronized operation of the large ring chain 18 and the small ring chain 19.

[0038] In actual operation, the column 14 is provided with a guide rail 20, and the periphery of the supporting platform 15 is provided with guide wheels 21. The guide wheels 21 roll along the guide rail 20 and guide the supporting platform 15 to rise and fall in a horizontal posture. The guide rail 20 is set vertically to guide the guide wheels 21 to move vertically, thereby ensuring that the supporting platform 15 rises and falls in a horizontal posture.

[0039] In actual operation, the lifting mechanism 2 includes a counterweight assembly, which includes a counterweight frame 22 and counterweight components mounted on the counterweight frame 22. The counterweight components are mounted on the counterweight frame 22, and the small chain 19 and the large chain 18 are both fixedly connected to the counterweight frame 22. The counterweight components can be added or removed according to usage requirements to reduce the operating load of the drive unit 16 and ensure that the support platform 15 and the stack 3 on it can be accurately lifted and adjusted.

[0040] In actual operation, the counterweight frame 22 and the supporting platform 15 are respectively placed on both sides of the small ring chain 19. The section of the small ring chain 19 between the supporting platform 15 and the counterweight frame 22 has the same length, and the supporting platform 15 and the counterweight frame 22 are respectively placed on the sections of the small ring chain 19 on both sides of the common rotating shaft, so that the counterweight frame 22 and the supporting platform 15 rise and fall in opposite directions when the small ring chain 19 is running. Specifically, the support platform 15 and the counterweight frame 22 are located at a low position and a high position, respectively. When the support platform 15 rises from the low position to the high position, the counterweight frame 22 linked with the support platform 15 descends from the high position to the low position. Conversely, when the support platform 15 descends from the high position to the low position, the counterweight frame 22 linked with the support platform 15 rises from the low position to the high position. This ensures that the support platform 15 and the counterweight frame 22 have the same lifting space, ensuring that the support platform 15 can move freely within the preset lifting range. It also uses the weight of the counterweight frame 22 and its counterweights to offset the weight of the support platform 15 and its stack 3, thereby facilitating the drive unit 16 to accurately control the height of the support platform 15.

[0041] In actual operation, the column 14 is provided with a slide rail 23, and the counterweight frame 22 is provided with a slider 7 that can slide along the slide rail 23. The slide rail 23 is vertically set and the slider 7 guides the counterweight frame 22 to slide vertically, effectively limiting the range of motion of the counterweight component, ensuring that the counterweight component slides along the preset path, and preventing the counterweight component from being jammed and colliding with surrounding components due to horizontal swaying.

Claims

1. A stacking device for mattresses, comprising a frame (1), characterized in that, The top of the frame (1) is provided with a receiving mechanism (4), and the frame (1) is provided with a lifting mechanism (2) for lifting the stack (3). The mattress is received by the receiving mechanism (4) and falls to be stacked on top of the stack (3). The height of the stack (3) is adjusted by the lifting mechanism (2) and the height difference between the top surface of the stack (3) and the receiving mechanism (4) is reduced, so as to reduce the falling distance of the mattress from the receiving mechanism (4) to the top of the stack (3).

2. The mattress stacking device according to claim 1, characterized in that, The receiving mechanism (4) includes a ring-shaped built-in conveyor belt (5) and a limiting plate (8). The built-in conveyor belt (5) includes two symmetrically arranged transfer chains (9). The transfer chains (9) are provided with support sections (6). The built-in conveyor belt (5) receives the mattress through the support sections (6) and moves to the top of the stack (3) by abutting against the limiting plate (8), so that the mattress is moved away from the support sections (6) and falls from between the transfer chains (9) to the top of the stack (3).

3. A stacking device for mattresses according to claim 2, characterized in that, The frame (1) is provided with a transfer gear, and the transfer chains (9) are parallel to each other and are respectively wound around the corresponding transfer gears. The transfer chains (9) are connected by laying belts, support plates or rollers to form the support section (6).

4. A stacking device for mattresses according to claim 3, characterized in that, The distance between the transfer chains (9) is greater than the width of the mattress, so that the mattress can pass through the transfer chains (9) in a horizontal position and fall to the top of the stack (3).

5. A stacking device for mattresses according to claim 3, characterized in that, The frame (1) is provided with a receiving cavity for the stacking (3) to be raised and lowered. The transfer chain (9) is L-shaped and includes a horizontal part set above the receiving cavity and a vertical part set on the side of the receiving cavity. The transfer gear drives the transfer chain (9) to operate and allows the supporting section (6) to switch back and forth between the horizontal part and the vertical part.

6. A stacking device for mattresses according to claim 5, characterized in that, The transfer gear includes a drive wheel (10) disposed at one end of the top of the frame (1), a steering wheel (11) disposed at the same height as the drive wheel (10), and a limiting wheel (12) disposed below the steering wheel (11). The section of the built-in conveyor belt (5) between the drive wheel (10) and the steering wheel (11) forms the horizontal part, and the section of the built-in conveyor belt (5) between the steering wheel (11) and the limiting wheel (12) forms the vertical part.

7. A stacking device for mattresses according to claim 5, characterized in that, The receiving mechanism (4) includes an external conveyor belt (13) that is connected at the same height as the horizontal section. The limiting plate (8) is located above the end of the horizontal section near the external conveyor belt (13). The limiting plate (8) can switch between a vertical blocking position and a raised clearance position. The mattress located on the supporting section (6) is blocked by the limiting plate (8) in the blocking position and falls from the supporting section (6) to the stack (3).

8. A stacking device for mattresses according to any one of claims 1-7, characterized in that, The frame (1) is rectangular and includes at least four separate columns (14). The lifting mechanism (2) includes a lifting chain assembly, a drive unit (16), and a support platform (15) arranged between the columns (14). The drive unit (16) drives the support platform (15) to rise and fall through the lifting chain assembly. The lifting chain assembly includes four axles (17) arranged in a matrix and parallel to each other at the four corners of the frame (1) and large ring chains (18) and small ring chains (19) fixed to the two side edges of the frame (1) respectively. The large ring chains (18) are wound around the four axles (17), and the small ring chains (19) are wound around the two axles (17) located on the same side of the frame (1). The drive unit (16) drives the large ring chains (18) and small ring chains (19) to run synchronously through the axles (17) and controls the support platform (15) to rise and fall in a horizontal posture.

9. A stacking device for mattresses according to claim 8, characterized in that, The axle (17) is provided with gears at both ends for the large ring chain (18) and the small ring chain (19) to engage. The large ring chain (18) and the small ring chain (19) are both in two sets and symmetrically arranged at both ends of the axle (17); or, the column (14) is provided with a guide rail (20) and the periphery of the support platform (15) is provided with a guide wheel (21). The guide wheel (21) rolls along the guide rail (20) and guides the support platform (15) to rise and fall in a horizontal posture.

10. A stacking device for mattresses according to claim 8, characterized in that, The lifting mechanism (2) includes a counterweight assembly, which includes a counterweight frame (22) and counterweights mounted on the counterweight frame (22). The large chain (18) and the small chain (19) are both connected to the counterweight frame (22). The column (14) is provided with a slide rail (23). The counterweight frame (22) is provided with a slider (7) that can slide along the slide rail (23). The counterweight frame (22) and the support platform (15) are respectively located on both sides of the small chain (19). The section of the small chain (19) between the support platform (15) and the counterweight frame (22) has the same length. The counterweight frame (22) and the support platform (15) lift and lower in opposite directions when the small chain (19) is running.

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