Cloth changing mechanism and method for medical transfer bed

Abstract

The application discloses a cloth changing mechanism and method for a medical transfer bed, and belongs to the technical field of medical equipment. The cloth changing mechanism comprises a lower bed plate, an upper bed plate, a roller shaft mounting seat, a roller shaft and bed cloth. One end of the upper bed plate is connected with the lower bed plate through a first limiting piece in a universal rotation mode, and the other end is connected with the lower bed plate in a rotatable detachable mode through a second limiting piece. One end of the roller shaft is connected in a universal rotation mode, and the other end is detachably mounted on the roller shaft mounting seat. The bed cloth is sleeved on the outer side of the roller shaft and the upper bed plate. The upper bed plate can be turned over, angle-adjusted and quickly detached, and is matched with the universal adjustable and quick detach structure of the roller shaft, so that the bed cloth can be quickly sleeved, replaced and tension-adjusted. The cloth changing operation is simple and does not need complex tools, the bed cloth replacement time is greatly shortened, the medical operation efficiency is improved, the bed cloth is laid flat and does not have slackness and deviation, and the cloth changing mechanism is suitable for the quick cloth changing requirement of the medical transfer bed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a fabric changing mechanism and method for a medical transport bed. Background Technology

[0002] Medical transport beds are core equipment used for patient transfer and transport in hospital wards, emergency rooms, and examination departments. To ensure hygiene and safety and avoid cross-infection, the bed sheets of transport beds need to be changed frequently. Current methods for changing the bed sheets of transport beds generally have the following problems: First, the upper bed board is mostly a fixed structure that cannot be flipped or its angle cannot be adjusted. The space for inserting and removing the bed sheet is narrow, making operation extremely inconvenient and time-consuming. Second, the rollers are mostly fixed installations that cannot be quickly disassembled or their angle cannot be adjusted. The bed sheet is difficult to insert smoothly, easily resulting in wrinkles, skewing, and loosening, affecting comfort and hygiene. Third, the connection structure between the upper and lower bed boards is complex, and disassembly and reassembly are cumbersome, requiring tools and increasing the workload of medical staff. Fourth, there is a lack of auxiliary support and temporary positioning structures. During the bed sheet changing process, the upper bed board is prone to shaking, and the rollers have no place to be positioned, resulting in poor operational stability and easily causing damage to the bed sheet or improper assembly.

[0003] The aforementioned problems result in low efficiency in changing bed linens and high labor intensity for medical staff, making it difficult to meet the needs of efficient, convenient, and hygienic use in medical settings. Therefore, developing a bed linen changing mechanism for a medical transport bed that allows for rapid linen changing, adjustable upper bed board angle, and quick-release and adjustable rollers is of significant practical importance. Summary of the Invention

[0004] In view of this, it is necessary to provide a fabric changing mechanism and method for medical transport beds, so as to at least solve the problems of low fabric changing efficiency, high labor intensity for medical staff, and difficulty in meeting the needs of efficient, convenient and hygienic use in medical scenarios in related technologies.

[0005] This application provides a fabric changing mechanism for a medical transport bed, including a lower bed board, an upper bed board, a roller mounting seat, a roller, and a bed fabric. A first limiting member is provided between one end of the upper bed board and the lower bed board, allowing the upper bed board to be rotatably adjusted to the lower bed board via the first limiting member. A second limiting member is provided between the other end of the upper bed board and the lower bed board, allowing the upper bed board to be rotatably detached from one side of the lower bed board via the second limiting member. The roller mounting seat is mounted on the lower bed board and located on the upper bed board. On one side of the bed board, one end of the roller is rotatably connected to one end of the roller mounting seat, and the other end of the roller is rotatably detachable from the other end of the roller mounting seat. The bed sheet is sleeved on the outer surface of the roller and the upper bed board. The lower bed board is used to be installed on the upper bed board and the roller mounting seat. The upper bed board is used to place the bed sheet and support the patient. The roller mounting seat is used to house the roller. The roller is used to adjust the tension of the bed sheet on the upper bed board.

[0006] In one embodiment, the first limiting member includes a universal seat disposed at one end of the lower bed plate and a universal bolt disposed at one end of the upper bed plate, the universal bolt being rotatably connected to the universal seat; wherein, one end of the upper bed plate can be angled at the universal seat of the lower bed plate via the universal bolt.

[0007] In one embodiment, the universal bolt is provided with a universal ball head, and the universal seat is provided with a spherical groove adapted to the universal ball head. The universal ball head is embedded in the spherical groove of the universal seat, and the universal bolt is rotatably connected to the spherical groove of the universal seat through the universal ball head. When the bed sheet needs to be replaced, the universal bolt rotates in the spherical groove of the universal seat through the universal ball head, so that one end of the upper bed board can be flipped over at one end of the lower bed board and the angle can be adjusted.

[0008] In one embodiment, the second limiting member includes a limiting seat located at the other end of the lower bed plate and a T-bolt located at the other end of the upper bed plate, the T-bolt being rotatably inserted into the limiting seat; wherein, the other end of the upper bed plate can be rotated or inserted into the limiting seat of the lower bed plate via the T-bolt.

[0009] In one embodiment, the T-bolt is provided with a T-shaped rotating head, and the limiting seat is provided with a T-shaped slot adapted to the T-shaped rotating head. The T-bolt can be rotatably inserted and removed into the T-shaped slot of the limiting seat through the T-shaped rotating head. When the bed sheet needs to be replaced, the T-bolt rotates in the T-shaped slot of the limiting seat through the T-shaped rotating head, so that the other end of the upper bed board is flipped to a vertical angle at the other end of the lower bed board and pulled out, thereby putting on or taking off the bed sheet.

[0010] In one embodiment, the roller mounting base is provided with a roller receiving cavity, the roller is rotatable within the roller receiving cavity, and bearing seats are provided at both ends of the roller mounting base. The two ends of the roller are respectively connected to an external drive mechanism through the bearing seats. The second bearing seat is provided with a spring locking structure. The external drive mechanism drives the roller to rotate in the roller receiving cavity through the bearing seats, so as to adjust the tension of the bed cloth sleeved on the outer surface of the roller and the upper bed board.

[0011] In one embodiment, the bearing housing includes a first bearing housing and a second bearing housing. The first bearing housing is fixed to one end of the roller shaft receiving cavity, and the second bearing housing is openable and closable at the other end of the roller shaft receiving cavity. One end of the roller shaft is provided with a fisheye bearing, and one end of the roller shaft is connected to an external drive mechanism via the fisheye bearing and the first bearing housing. The other end of the roller shaft is connected to the external drive mechanism via the second bearing housing. When the bed sheet needs to be replaced, the second bearing housing is flipped open, and the other end of the roller shaft is separated from the external drive mechanism, thereby removing the other end of the roller shaft from the roller shaft receiving cavity. The angle between the roller shaft and the first bearing housing is adjusted via the fisheye bearing to facilitate the replacement of the bed sheet.

[0012] In one embodiment, a cover plate is provided above the roller receiving cavity and between the first bearing seat and the second bearing seat, and small rollers are provided on the inner peripheral sidewall of the roller receiving cavity and the inner side of the cover plate; wherein, when the external driving mechanism drives the roller to rotate, a plurality of the small rollers assist the roller to rotate, so that the roller adjusts the tension of the bed cloth on the surface of the upper bed board.

[0013] In one embodiment, an auxiliary support and a hook are also included. The auxiliary support is located on one side of the roller receiving cavity, and the hook can be placed on the upper bed board. The auxiliary support is used to temporarily support the bottom of the other end of the upper bed board when the bed sheet is changed, and the hook is used to temporarily place the other end of the roller when the bed sheet is changed, so as to facilitate the operator to change the bed sheet.

[0014] A method for changing fabric includes the following steps: S1: The staff flips the upper bed board so that the upper bed board and the lower bed board are at a 90° angle, and places the hooks on the upper bed board; S2: Open the cover plate and the second bearing seat, take one end of the roller shaft out of the roller shaft receiving cavity, and with the assistance of the fish eye bearing, adjust the lifting angle of the roller shaft and place it on the hook; S3: Adjust the lifting angle between the upper bed board and the lower bed board by using fisheye bolts to facilitate the removal of the bed sheet from the upper bed board and place the upper bed board on the auxiliary support for transition; S4: Lift the upper bed board on the auxiliary support, and put the new bed cloth back onto the outer surface of the upper bed board and the roller; S5: Remove the tension roller from the hook and reinstall it into the roller housing cavity. Flip the upper bed plate so that it is flat on the lower bed plate. S6: Close the cover plate and the second bearing seat to complete the entire fabric replacement process.

[0015] The fabric changing mechanism provided by this invention has the following significant advantages compared with the prior art: 1. The cloth changing operation is simple and efficient, greatly improving the changing speed: The upper bed board can be flipped, the angle can be adjusted, and it can be quickly disassembled. The roller can be quickly disassembled and the universal angle can be adjusted. The bed cloth can be removed, put on, and reset without tools, which significantly shortens the cloth changing time and reduces the operation intensity of medical staff.

[0016] 2. The upper bed board is flexible in adjustment, with stronger adaptability and operability. One end of the upper bed board can be adjusted in multiple dimensions through a universal ball joint and a universal seat, while the other end can be rotated and plugged in through a T-shaped turn head and a limit seat. The opening and closing angle and disassembly status can be freely adjusted according to the needs of changing fabric, providing ample operating space.

[0017] 3. Adjustable roller shaft with quick-release structure for smoother fabric change: One end of the roller shaft uses a fisheye bearing to achieve universal connection, and the other end can be quickly opened and separated. When changing fabric, it can be lifted and temporarily hung to avoid interference, making it easier to put on the bed sheet and effectively preventing wrinkles and skewing.

[0018] 4. Stable tension of the bed sheet, laid flat and not loose: The roller, together with the roller housing cavity and small roller, achieves stable rotation, which can automatically adjust the tension of the bed sheet, ensuring that the bed sheet is always flat and fits the upper bed board, improving patient comfort and hygiene standards.

[0019] 5. Equipped with auxiliary support and hanging structure for safer and more stable operation: When changing fabric, the upper bed board can be temporarily supported by the auxiliary bracket, and the roller can be temporarily placed by the hook to prevent the parts from shaking or falling, thereby improving the stability and safety of operation.

[0020] 6. The overall structure is simple and reliable with low maintenance costs: the components are firmly connected and move smoothly, without complex transmission or vulnerable structures, ensuring high stability over long-term use. Assembly and maintenance are simple, making it suitable for various medical transport bed usage scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a partial structural diagram of one end of an embodiment of this application; Figure 3 This is a partial structural diagram of the other end of the bed board mechanism according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the first limiting member according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the second limiting member according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the fisheye bearing according to an embodiment of this application; Figure 7 This is a diagram illustrating one of the working states in an embodiment of this application. Figure 8 This is another working state diagram of an embodiment of this application. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that when a component is said to be "mounted on" another component, it can be directly mounted on the other component or may be interspersed with a component. When a component is said to be "set on" another component, it can be directly set on the other component or may be interspersed with a component. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or may be interspersed with a component.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please see Figures 1 to 8 This invention provides a fabric changing mechanism for a medical transport bed, comprising a lower bed board 100, an upper bed board 200, a roller mounting seat 300, a roller 400, and a bed sheet 900. A first limiting member 500 is provided between one end of the upper bed board 200 and the lower bed board 100, allowing the upper bed board 200 to be rotatably adjusted to the lower bed board 100 via the first limiting member 500. A second limiting member 600 is provided between the other end of the upper bed board 200 and the lower bed board 100, allowing the upper bed board 200 to be rotatably detached from one side of the lower bed board 100 via the second limiting member 600. The roller mounting seat 300 is mounted on the lower bed board 100. Located on one side of the upper bed board 200, a roller 400 is rotatably connected at one end to a roller mounting base 300, and the other end of the roller 400 is rotatably detachable from the other end of the roller mounting base 300. A bed sheet 900 is fitted onto the outer surface of the roller 400 and the upper bed board 200. The lower bed board 100 is used to install on the upper bed board 200 and the roller mounting base 300. The upper bed board 200 is used to place the bed sheet 900 and support the patient. The roller mounting base 300 is used to place the roller 400. The roller 400 is used to adjust the tension of the bed sheet 900 on the upper bed board 200.

[0026] In some of the alternative embodiments, the first limiting member 500 includes a universal seat 51 disposed at one end of the lower bed plate 100 and a universal bolt 52 disposed at one end of the upper bed plate 200, the universal bolt 52 being rotatably connected to the universal seat 51; wherein, one end of the upper bed plate 200 can be angled at the universal seat 51 of the lower bed plate 100 via the universal bolt 52.

[0027] In some alternative embodiments, the universal bolt 52 is provided with a universal ball head 521, and the universal seat 51 is provided with a spherical groove 511 adapted to the universal ball head 521. The universal ball head 521 is embedded in the spherical groove 511 of the universal seat 51, and the universal bolt 52 is rotatably connected to the spherical groove of the universal seat 51 through the universal ball head 521. When it is necessary to replace the bed sheet 900, the universal bolt 52 rotates in the spherical groove of the universal seat 51 through the universal ball head 521, so that one end of the upper bed board 200 can be flipped at one end of the lower bed board 100 and the angle can be adjusted.

[0028] In some alternative embodiments, the second limiting member 600 includes a limiting seat 61 located at the other end of the lower bed plate 100 and a T-bolt 62 located at the other end of the upper bed plate 200. The T-bolt 62 is rotatably inserted into the limiting seat 61. The other end of the upper bed plate 200 can be rotated or inserted into the limiting seat 61 of the lower bed plate 100 via the T-bolt 62.

[0029] In some alternative embodiments, the T-bolt 62 is provided with a T-shaped rotating head 621, and the limiting seat 61 is provided with a T-shaped slot 622 adapted to the T-shaped rotating head 621. The T-bolt 62 can be rotatably inserted and removed into the T-shaped slot 622 of the limiting seat 61 through the T-shaped rotating head 621. When it is necessary to replace the bed sheet 900, the T-bolt 62 rotates in the T-shaped slot 622 of the limiting seat 61 through the T-shaped rotating head 621, so that the other end of the upper bed board 200 is flipped to a vertical angle at the other end of the lower bed board 100 and pulled out, thereby putting on or taking off the bed sheet 900.

[0030] In some alternative embodiments, the roller mounting base 300 is provided with a roller receiving cavity 31, and the roller 400 is rotatable in the roller receiving cavity 31. The roller mounting base 300 is provided with bearing seats at both ends, and the two ends of the roller 400 are respectively connected to an external drive mechanism through the bearing seats. The external drive mechanism drives the roller 400 to rotate in the roller receiving cavity 31 through the bearing seats, so as to adjust the tension of the bed cloth 900 sleeved on the outer surface of the roller 400 and the upper bed board 200.

[0031] In some alternative embodiments, the bearing housing includes a first bearing housing 32 and a second bearing housing 33. The first bearing housing 32 is fixed to one end of the roller shaft receiving cavity 31, and the second bearing housing 33 is openable and closable at the other end of the roller shaft receiving cavity 31. One end of the roller shaft 400 is provided with a fisheye bearing 41, and one end of the roller shaft 400 is connected to an external drive mechanism through the fisheye bearing 41 and the first bearing housing 32. The other end of the roller shaft 400 is connected to an external drive mechanism through the second bearing housing 33. The second bearing housing 33 is provided with a spring locking structure. When it is necessary to replace the bed sheet 900, the second bearing housing 33 is flipped open, and the other end of the roller shaft 400 is separated from the external drive mechanism, thereby removing the other end of the roller shaft 400 from the roller shaft receiving cavity 31. The angle between the roller shaft 400 and the first bearing housing 32 is adjusted by the fisheye bearing 41 to facilitate the replacement of the bed sheet 900.

[0032] In some alternative embodiments, a cover plate 34 is provided above the roller receiving cavity 31 and between the first bearing seat 32 and the second bearing seat 33. Small rollers 35 are provided on the inner circumferential sidewall of the roller receiving cavity 31 and the inner side of the cover plate 34. When the external drive mechanism drives the roller 400 to rotate, several small rollers 35 assist the roller 400 to rotate, so that the roller 400 can adjust the tension of the bed cloth 900 on the surface of the upper bed board 200.

[0033] In some alternative embodiments, an auxiliary support 700 and a hook 800 are also included. The auxiliary support 700 is located on one side of the roller receiving cavity 31, and the hook 800 can be placed on the upper bed board 200. The auxiliary support 700 is used to temporarily support the bottom of the other end of the upper bed board 200 when changing the bed cloth 900, and the hook 800 is used to temporarily place the other end of the roller 400 when changing the bed cloth 900, so as to facilitate the operator to change the bed cloth 900.

[0034] A method for changing fabric includes the following steps: S1: The staff flips the upper bed board 200 so that the upper bed board 200 and the lower bed board 100 are at a 90° angle, and places the hook 800 on the upper bed board 200; S2: Open the cover plate 34 and the second bearing seat 33, take one end of the roller 400 out of the roller receiving cavity 31, and with the assistance of the fish eye bearing 41, adjust the lifting angle of the roller 400 and place it on the hook 800. S3: Adjust the lifting angle between the upper bed board 200 and the lower bed board 100 by using fisheye bolts to facilitate the removal of the bed sheet 900 from the upper bed board 200 and place the upper bed board 200 on the auxiliary support 700 for transition. S4: Lift the upper bed board 200 on the auxiliary support 700, and put the new bed cloth 900 back onto the outer surface of the upper bed board 200 and the roller 400; S5: Remove the tension roller from the hook 800 and reinstall it into the roller housing cavity 31. Flip the upper bed plate 200 so that the upper bed plate 200 is placed flat on the lower bed plate 100. S6: Close the cover plate 34 and the second bearing seat 33 to complete the entire fabric replacement process.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fabric changing mechanism for a medical transport bed, characterized in that, The device includes a lower bed board, an upper bed board, a roller mounting base, a roller, and a bed sheet. A first limiting member is provided between one end of the upper bed board and the lower bed board, allowing the upper bed board to be rotatably adjusted to the lower bed board via the first limiting member. A second limiting member is provided between the other end of the upper bed board and the lower bed board, allowing the upper bed board to be rotatably detached from one side of the lower bed board via the second limiting member. The roller mounting base is mounted on the lower bed board and located on one side of the upper bed board. One end of the roller is rotatably connected to one end of the roller mounting base, and the other end of the roller is rotatably detached from the other end of the roller mounting base. The bed sheet is fitted over the outer surfaces of the roller and the upper bed board. The lower bed plate is used to be installed on the upper bed plate and the roller mounting seat; The upper bed board is used to place the bed sheet and support the patient; The roller mounting base is used to mount the roller; The roller is used to adjust the tension of the bed fabric on the upper bed board.

2. The fabric changing mechanism for a medical transport bed according to claim 1, characterized in that, The first limiting member includes a universal seat located at one end of the lower bed plate and a universal bolt located at one end of the upper bed plate. The universal bolt is rotatably connected to the universal seat. The upper bed plate can be angled at the universal seat on the lower bed plate via the universal bolt.

3. The fabric changing mechanism for a medical transport bed according to claim 2, characterized in that, The universal bolt is provided with a universal ball head, and the universal seat is provided with a spherical groove adapted to the universal ball head. The universal ball head is embedded in the spherical groove of the universal seat, and the universal bolt is rotatably connected to the spherical groove of the universal seat through the universal ball head. When the bed sheet needs to be replaced, the universal bolt rotates in the spherical groove of the universal seat through the universal ball head, so that one end of the upper bed board can be flipped over at one end of the lower bed board and the angle can be adjusted.

4. The fabric changing mechanism for a medical transport bed according to claim 1, characterized in that: The second limiting member includes a limiting seat located at the other end of the lower bed plate and a T-bolt located at the other end of the upper bed plate. The T-bolt is rotatably inserted into the limiting seat. The other end of the upper bed plate can be rotated or inserted into the limiting seat of the lower bed plate via the T-bolt.

5. The fabric changing mechanism for a medical transport bed according to claim 4, characterized in that: The T-bolt is equipped with a T-shaped rotating head, and the limiting seat is equipped with a T-shaped slot that matches the T-shaped rotating head. The T-bolt can be rotatably inserted and removed into the T-shaped slot of the limiting seat through the T-shaped rotating head. When the bed sheet needs to be replaced, the T-bolt rotates within the T-shaped slot of the limiting seat through the T-shaped rotating head, so that the other end of the upper bed board is flipped to a vertical angle at the other end of the lower bed board and pulled out, thereby allowing the bed sheet to be put on or taken off.

6. The fabric changing mechanism for a medical transport bed according to claim 1, characterized in that: The roller mounting base is provided with a roller receiving cavity, and the roller can rotate within the roller receiving cavity. Bearing seats are provided at both ends of the roller mounting base, and both ends of the roller are respectively connected to an external drive mechanism through the bearing seats. The external drive mechanism drives the roller to rotate in the roller receiving cavity through the bearing seats, so as to adjust the tension of the bed cloth sleeved on the outer surface of the roller and the upper bed board.

7. The fabric changing mechanism for a medical transport bed according to claim 6, characterized in that: The bearing housing includes a first bearing housing and a second bearing housing. The first bearing housing is fixed to one end of the roller shaft receiving cavity, and the second bearing housing is openable and closable at the other end of the roller shaft receiving cavity. One end of the roller shaft is provided with a fisheye bearing, and one end of the roller shaft is connected to an external drive mechanism via the fisheye bearing and the first bearing housing. The other end of the roller shaft is connected to the external drive mechanism via the second bearing housing. When it is necessary to replace the bed sheet, the second bearing housing is flipped open, and the other end of the roller shaft is separated from the external drive mechanism, thereby removing the other end of the roller shaft from the roller shaft receiving cavity. The angle between the roller shaft and the first bearing housing is adjusted by the fisheye bearing to facilitate the replacement of the bed sheet.

8. The fabric changing mechanism for a medical transport bed according to claim 6, characterized in that: A cover plate is provided above the roller receiving cavity and between the first bearing seat and the second bearing seat. Small rollers are provided on the inner circumferential sidewall of the roller receiving cavity and the inner side of the cover plate. When the external driving mechanism drives the roller to rotate, several of the small rollers assist the roller to rotate, so that the roller can adjust the tension of the bed cloth on the surface of the upper bed board.

9. The fabric changing mechanism for a medical transport bed according to claim 6, characterized in that: It also includes an auxiliary support and a hook. The auxiliary support is located on one side of the roller receiving cavity, and the hook can be placed on the upper bed board. The auxiliary support is used to temporarily support the bottom of the other end of the upper bed board when the bed sheet is changed, and the hook is used to temporarily place the other end of the roller when the bed sheet is changed, so as to facilitate the operator to change the bed sheet.

10. A method for changing fabric, characterized in that: It includes the following steps: S1: The staff flips the upper bed board so that it is 90° with the lower bed board, and places the hook on the upper edge of the upper bed board; S2: Open the cover plate and the second bearing seat, take one end of the roller shaft out of the roller shaft receiving cavity, and with the assistance of the fish eye bearing, adjust the lifting angle of the roller shaft and place it on the hook; S3: Adjust the lifting angle between the upper bed board and the lower bed board by using fisheye bolts to facilitate the removal of the bed sheet from the upper bed board and place the upper bed board on the auxiliary support for transition; S4: Lift the upper bed board on the auxiliary support, and put the new bed cloth back onto the outer surface of the upper bed board and the roller; S5: Remove the tension roller from the hook and reinstall it into the roller housing cavity. Flip the upper bed plate so that it is flat on the lower bed plate. S6: Close the cover plate and the second bearing seat to complete the entire fabric replacement process.

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