Externally-hung elevator frame and enclosure structure made of bamboo-based composite materials

Abstract

The utility model provides an externally-hung elevator frame and enclosure structure made of bamboo-based composite materials, which comprises an externally-hung elevator frame structure and a corridor structure which are built by round bamboo composite cross beams, round bamboo composite stand columns and connecting nodes in an assembly mode, and a bamboo-based composite material covering the periphery of the frame structure, and the round bamboo composite cross beams are composed of spliced round bamboo frames, fiber winding layers and protective layers. The round bamboo composite cross beams, the round bamboo composite stand columns and the enclosure cylinders are made of round bamboos, bamboo splits and natural bonding materials, the anti-seismic structure is excellent, the processing cost is low, the round bamboo composite cross beams, the round bamboo composite stand columns and the enclosure cylinders can be naturally degraded or recycled, the construction process is green and environmentally friendly, and the anti-seismic effect is good. Energy conservation and emission reduction are facilitated, and meanwhile the bamboo wood can be widely applied to the building industry.

Description

Technical Field

[0001] This utility model relates to the field of elevator frame technology, and more particularly to an external elevator frame and enclosure structure constructed of bamboo-based composite material. Background Technology

[0002] Adding elevators to existing buildings typically involves constructing elevator shafts outside the existing building's stairwells, with connecting corridors linking the shafts to the existing structure. These connecting corridors are generally flexible connections to the existing building (restricting horizontal movement but not vertical movement).

[0003] Elevator shafts are typically constructed using reinforced concrete or steel structures. Reinforced concrete structures, when cast in place, have drawbacks such as long construction periods and significant environmental impacts from on-site construction. Therefore, precast reinforced concrete structures are more commonly used nowadays. Steel structures, on the other hand, use steel frames as the main load-bearing structure and glass or other materials for the enclosure walls. Their disadvantages include the susceptibility of steel structures to rust, requiring regular maintenance, poor waterproofing and insulation performance of glass enclosure walls, the risk of glass breakage leading to falling objects and injuries, and the difficulty of repairs.

[0004] Therefore, this application proposes an external elevator frame and enclosure structure constructed of bamboo-based composite material to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to solve the problems of existing reinforced concrete elevator shafts, such as the steel structure being prone to rust and requiring regular maintenance, poor waterproofing and insulation performance of the enclosing walls, and high maintenance difficulty and cost. The technical solution of this utility model is: an external elevator frame constructed of bamboo-based composite materials, including round bamboo composite columns, round bamboo composite beams, diagonal braces, and connecting nodes. Multiple round bamboo composite columns are arranged vertically in a rectangular pattern on a concrete foundation with pre-embedded bolts. Each round bamboo composite column extends upwards and is sequentially assembled with the connecting nodes and round bamboo composite columns. The two ends of the round bamboo composite beams are fixedly connected to the connecting nodes between adjacent round bamboo composite columns and between the round bamboo composite columns and the existing building, forming a cuboid shaft frame structure and a connecting corridor structure; the connecting corridor structure is fixedly connected to the existing building.

[0006] Preferably, the round bamboo composite column and round bamboo composite beam include a spliced ​​round bamboo frame, a fiber winding layer and a protective layer. The spliced ​​round bamboo frame is composed of one or more hollow round bamboos arranged alternately at their large and small ends. The fiber winding layer wraps around the periphery of the spliced ​​round bamboo frame, and a protective layer is provided around the periphery of the fiber winding layer.

[0007] Preferably, each hollow bamboo has an external connecting rod at both its inner ends. The external connecting rod and the hollow bamboo have multiple sets of through holes perpendicular to the axis for connecting screws to pass through. The included angle between the different sets of through holes ranges from 1° to 90°. The external connecting rod is connected to the hollow bamboo by a connecting screw. The end face of the external connecting rod is flush with the end face of the hollow bamboo. The outer end of the external connecting rod has a connecting hole. The gap between the hollow bamboo and the external connecting rod is filled with adhesive filler.

[0008] Preferably, the connecting corridor structure is fixedly connected to the existing building.

[0009] Preferably, each layer of adjacent round bamboo composite columns is provided with a diagonal brace, one end of which is connected to the upper end of the round bamboo composite column, and the other end of which is connected to the lower end of the adjacent round bamboo composite column.

[0010] Preferably, the fiber winding layer includes bamboo strips and connectors. The multiple bamboo strips are arranged side by side and bonded to the connectors to form a bamboo strip curtain. The multiple bamboo strip curtains are wound around the column surface of the assembled round bamboo frame to form the fiber winding layer.

[0011] Preferably, the connecting node includes a box body and a cover plate. The box body is hollow inside, and the top and bottom of the box body are missing to form a cylindrical shape. The cover plate can be connected to the top and bottom of the box body. The round bamboo composite column is connected to the cover plate, and the round bamboo composite beam is connected to the outer side of the box body.

[0012] Preferably, the edge of the cover plate is bent at 90°, and the edge of the cover plate and the sides of the upper and lower ends of the box body are provided with holes for connection and fixing.

[0013] Preferably, the cover plate is provided with a support auxiliary plate at the connection of the box body. The support auxiliary plate includes a connecting plate and a support plate. The connecting plate and the support plate are perpendicular to each other. The connecting plate is connected to the side of the lower end of the box body. The support plate is used to abut against the lower surface of the round bamboo composite beam connected to the side of the box body.

[0014] Preferably, the upper and lower ends of the box are provided with flanges, the flanges are flush with the upper and lower surfaces of the box, and the cover plate is fixedly connected to the flanges.

[0015] An external elevator enclosure structure is installed on the periphery of the external elevator frame constructed of bamboo-based composite material. It includes an enclosure tube consisting of an inner lining layer, a reinforcing layer, and an outer protective layer, arranged sequentially from the inside to the outside. The upper and lower edges of the enclosure tube are provided with interlocking fasteners.

[0016] Preferably, the connecting buckle includes a male head and a female head, the male head being located on the upper side of the enclosure tube and the female head being located on the lower side of the enclosure tube.

[0017] Preferably, the enclosure tube has a first through hole for the round bamboo composite beam to pass through and a doorway adapted to the elevator door on the side closest to the existing building.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] 1. The round bamboo composite beams and round bamboo composite columns used in this utility model are profiles constructed of bamboo-based composite materials. The materials used to construct them are round bamboo, bamboo strips, etc., which are all pure natural green materials that can be naturally degraded or reused, which is conducive to the widespread application of bamboo in the construction industry and helps to save energy and reduce emissions.

[0020] 2. The round bamboo composite beams and round bamboo composite columns used in this utility model can be processed and manufactured in the factory and then transported to the site for assembly. The construction time is short and there is no pollution such as water, air, or noise at the construction site. It can be assembled and connected with bolts on site with the help of construction equipment, thus realizing green construction.

[0021] 3. Bamboo is inexpensive, abundant, and readily available. It is also produced in factories and assembled on-site, resulting in low overall costs and good economic efficiency.

[0022] 4. my country has abundant bamboo resources, but their utilization rate is low. Converting bamboo resources into economic benefits through value creation can increase the income of farmers who own bamboo resources.

[0023] 5. Compared with concrete frames and enclosure structures, this structure is lighter, has better structural reliability and seismic performance, is easier and faster to construct, is easier to standardize, has lower investment, shorter construction period, and better overall benefits;

[0024] 6. The round bamboo composite beams and columns used in this utility model have been treated with anti-corrosion during factory processing and manufacturing. Their service life is the same as the design life of the building. Compared with steel structure frames and glass enclosure structures, this structure basically requires no maintenance during its service life. The overall cost is lower during its service life. It also has obvious advantages in earthquake resistance, heat preservation and waterproof performance, and eliminates the safety hazards of glass breakage and falling injury.

[0025] The detailed structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an external elevator frame constructed from bamboo-based composite materials according to this utility model;

[0027] Figure 2This is one of the cross-sectional views of the round bamboo composite column and round bamboo composite beam of this utility model;

[0028] Figure 3 This is the second cross-sectional view of the round bamboo composite column and round bamboo composite beam of this utility model;

[0029] Figure 4 This is a schematic diagram showing the connection between the round bamboo composite column and the foundation of this utility model;

[0030] Figure 5 This is the third cross-sectional view of the round bamboo composite column and round bamboo composite beam of this utility model;

[0031] Figure 6 This is a schematic diagram of the appearance of the connection node of this utility model;

[0032] Figure 7 This is one of the exploded schematic diagrams of the connection node of this utility model;

[0033] Figure 8 This is the second exploded view of the connection node of this utility model;

[0034] Figure 9 This is a schematic diagram showing the connection of the round bamboo composite column, round bamboo composite beam and connecting nodes of this utility model.

[0035] Figure 10 This is a schematic diagram of the connection of the protective casing of this utility model;

[0036] Figure 11 This utility model Figure 10 A partial sectional view at point A;

[0037] Figure 12 This is a cross-sectional view of the enclosure tube of this utility model;

[0038] Figure 13 This is a detailed construction diagram of the elevator frame and enclosure structure of this utility model.

[0039] Component names and corresponding serial numbers: 1. Round bamboo composite column; 2. Round bamboo composite beam; 3. Connection node; 4. Existing building; 5. Assembled round bamboo frame; 6. Fiber winding layer; 7. Protective layer; 8. External connecting rod; 9. Connecting screw; 10. Hollow round bamboo; 11. Connecting hole; 12. Adhesive filler; 13. Diagonal brace; 14. Box body; 15. Cover plate; 16. Supporting auxiliary plate; 17. Flange plate; 18. Enclosure tube; 19. Inner lining layer; 20. Reinforcing layer; 21. Outer protective layer; 22. Female connector; 23. Male connector. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. The following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0041] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by a person skilled in the art to which this disclosure pertains. The words “comprising” or “including” and similar terms used in this disclosure mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. “Up,” “down,” “left,” “right,” etc., are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] like Figure 1 As shown: An external elevator frame constructed of bamboo-based composite material includes round bamboo composite columns 1, round bamboo composite beams 2, diagonal braces 13, and connecting nodes 3. Multiple round bamboo composite columns 1 are vertically arranged at the bottom of the frame structure to form a bottom rectangle (in this embodiment, six round bamboo composite columns 1 form the bottom rectangle). Each round bamboo composite column 1 extends upwards to be fitted with the connecting node 3 and the round bamboo composite column 1. The two ends of the round bamboo composite beam 2 are respectively fixedly connected to adjacent round bamboo composite columns 1 and to the connecting node 3 between the round bamboo composite column 1 and the existing building 4. Figure 1 and 9 As shown, they form a cuboid frame structure and a connecting corridor structure, respectively;

[0043] Please see Figure 2-5 Specifically, the round bamboo composite column 1 and round bamboo composite beam 2 include a spliced ​​round bamboo frame 5, a fiber winding layer 6, and a protective layer 7. The spliced ​​round bamboo frame 5 is composed of one or more hollow round bamboos 10 arranged with their large and small ends staggered. Figure 2 A composite round bamboo frame 5 is composed of 10 hollow round bamboo tubes. Figure 5The composite round bamboo frame 5 is composed of four hollow round bamboos 10. The fiber winding layer 6 is wrapped around the periphery of the composite round bamboo frame 5, and a protective layer 7 is provided around the periphery of the fiber winding layer 6.

[0044] Specifically, each hollow round bamboo 10 has external connecting rods 8 at both inner ends. The external connecting rods 8 and the hollow round bamboo 10 have multiple sets of through holes perpendicular to the axis for connecting screws 9 to pass through. The included angle between different sets of through holes ranges from 1° to 90°, following the formula A=180° / n, where A is the included angle and n is the number of through hole sets. The external connecting rods 8 are connected to the hollow round bamboo 10 via connecting screws 9. The end face of the external connecting rod 8 is flush with the end face of the hollow round bamboo 10. The outer end of the external connecting rod 8 has a connecting hole 11. Adhesive filler 12 is provided between the hollow round bamboo 10 and the external connecting rod 8. Conventional screws and bolts can be screwed into the connecting hole 11 to fix the round bamboo composite beam 2, round bamboo composite column 1, and connecting node 3.

[0045] Specifically, the connecting corridor structure is fixedly connected to the existing building 4, that is, the connecting nodes 3 on the round bamboo composite columns 1 that constitute the connecting corridor structure are fixedly connected to the wall of the existing building 4 by bolts.

[0046] Specifically, each layer of adjacent round bamboo composite columns 1 is provided with a diagonal brace 13. One end of the diagonal brace 13 is connected to the upper end of the round bamboo composite column 1, and the other end of the diagonal brace 13 is connected to the lower end of the adjacent round bamboo composite column 1. The connection can be achieved by: connecting a clamp to both ends of the diagonal brace 13, and securing the column surface of the round bamboo composite column 1 with the clamp; or by pre-setting connection holes at both ends of the diagonal brace 13, and securing the connection by screwing the connection holes to the connection nodes.

[0047] Specifically, the fiber winding layer 6 includes bamboo strips and connectors. Multiple bamboo strips are arranged side-by-side and bonded to the connectors to form a bamboo curtain. Multiple bamboo curtains are wound around the cylindrical surface of the assembled round bamboo frame to form the fiber winding layer 6. The bamboo curtain is generally composed of multiple bamboo strips, each 4-6 meters long, arranged side-by-side to a width of 20-50 centimeters. These strips are overlapped and bonded to gauze to form a continuous bamboo curtain. Based on the angle of the bamboo strips' arrangement on the gauze, it can be classified as a circumferential bamboo curtain, a positive spiral bamboo curtain, or a negative spiral bamboo curtain. Layers of bamboo curtains can also be wound alternately in circumferential, positive spiral, circumferential, negative spiral, and circumferential directions around the periphery of the assembled round bamboo frame 5 and bonded to form the fiber winding layer 6. The number of winding layers is 3-5. The fiber winding layer 6, composed of bamboo strips in multiple angles and directions, enables the assembled round bamboo frame 5 to better resist radial loads, improving the toughness and seismic performance of the round bamboo composite beam and column.

[0048] It is worth noting that the fiber material in the fiber winding layer 6 can also be other existing fiber materials such as glass fiber and carbon fiber that can meet the requirements of constraining the radial deformation of the round bamboo when it is under stress.

[0049] like Figure 6 As shown, specifically, the connecting node 3 includes a box body 14 and a cover plate 15. The box body 14 is hollow inside, and the top and bottom of the box body 14 are missing to form a cylindrical shape. The cover plate 15 can be connected to the top and bottom of the box body 14. The round bamboo composite column 1 is connected to the cover plate 15, and the round bamboo composite beam 2 is connected to the outer side of the box body 14. The side of the box body 14 and the cover plate 15 are provided with connecting through holes that are adapted to the connecting holes on the end faces of the round bamboo composite column 1 and the round bamboo composite beam 2. The round bamboo composite column 1 and the round bamboo composite beam 2 can be detachably connected to the connecting node 3 by bolts.

[0050] To further strengthen the connection between the round bamboo composite column 1, the round bamboo composite beam 2 and the connection node 3, concrete can be poured into the box 14 of the connection node 3 after the connection is completed to further enhance the connection strength.

[0051] like Figure 7 As shown, specifically, the edge of the cover plate 15 is bent at 90°. The cover plate 15 includes an upper cover plate 15 and a lower cover plate 15. The upper cover plate 15 is concave downward and the lower cover plate 15 is concave upward. The horizontal plate portion of the cover plate 15 is provided with bolt holes for connection to the round bamboo composite column 1, and the vertical plate portion of the cover plate 15 is provided with bolt holes for connection to the box body 14.

[0052] Furthermore, the cover plate 15 is provided with a support auxiliary plate 16 at the connection of the box body 14. The support auxiliary plate 16 includes a connecting plate and a support plate. The connecting plate and the support plate are perpendicular to each other. The connecting plate is connected to the side of the lower end of the box body 14. The support plate is used to abut against the lower surface of the round bamboo composite beam 2 connected to the side of the box body 14. During installation, the round bamboo composite beam 2 can be temporarily placed by the support auxiliary plate 16. After installation, it can also support the end of the round bamboo composite beam 2.

[0053] In actual construction, there may be situations where the column diameter is too large and cannot match the node connection device. If the circumference of the box 14 is increased indiscriminately, it will lead to a loose fit between the round bamboo composite beam 2 and the box 14. Therefore, an alternative solution is proposed, such as... Figure 8 As shown, the upper and lower ends of the box body 14 are provided with flange plates 17, the flange plates 17 are flush with the upper and lower surfaces of the box body 14, and the cover plate 15 is fixedly connected to the flange plates 17.

[0054] Its reference Figure 10 and Figure 12This utility model also provides an external elevator enclosure structure, installed around the external elevator frame constructed of bamboo-based composite material. It includes an enclosure cylinder 18 composed of an inner lining layer 19, a reinforcing layer 20, and an outer protective layer 217, arranged sequentially from the inside out. The inner lining layer 19 is made of fiber felt or non-woven fabric impregnated with adhesive and cured to form a seepage-proof and smooth inner wall. The reinforcing layer 20 is formed by multiple layers of bamboo strips adhered to resin, wound around the inner lining layer 19 and cured. The bamboo strips are composed of multiple parallel bamboo fibers arranged side-by-side, woven and fixed with yarn every 300-500 mm to form a curtain-like structure. All bamboo strips are wound around the inner lining layer 19 in a circumferential manner with a winding angle of 85° to 90°, and the total number of layers is... The number of layers is set to 14 or more; the reinforcing layer 20 includes a first reinforcing layer and a second reinforcing layer from the inside out, wherein the bamboo strip curtain of the first reinforcing layer adopts a circumferential bamboo strip curtain, that is, the length direction of all bamboo strips is consistent with the length direction of the bamboo strip curtain they form, and the bamboo strip curtain of the second reinforcing layer adopts an axial bamboo strip curtain, that is, the length direction of all bamboo strips is consistent with the width direction of the bamboo strip curtain they form, and the thickness of the first reinforcing layer accounts for at least 70% of the total thickness of the reinforcing layer 20; the outer protective layer 217 is directly coated and cured on the outer surface of the composite reinforcing layer 20, and plays a role in waterproofing, corrosion prevention and radiation protection; the upper edge and lower edge of the enclosure cylinder 18 are provided with interlocking fasteners.

[0055] In this embodiment, the cross-section of the enclosure cylinder 18 is rectangular.

[0056] Please see Figure 11 Furthermore, the connecting buckle includes a male head 23 and a female head 22. The male head 23 is located on the upper side of the enclosure tube 18, and the female head 22 is located on the lower side of the enclosure tube 18. The cross-sectional dimension of the upper side of the enclosure tube 18 is smaller than that of the lower side of the enclosure tube 18. During installation, the female head 22 on the lower side of the upper enclosure tube 18 can cover the periphery of the male head 23 on the upper side of the lower enclosure tube 18 and fit tightly with it, which can effectively prevent rainwater from entering the enclosure tube 18.

[0057] It is worth noting that the inner dimension of the rectangular enclosure tube 18 is slightly larger than the outer dimension of the frame structure. During installation, the enclosure tube 18 needs to be fitted over the frame structure and bolted to fix the enclosure tube 18 to the frame. A hole slightly larger than the cross-sectional size of the longitudinal beam is made at the connection between the longitudinal beam of the connecting corridor and the frame structure to facilitate the longitudinal beam to pass through and be firmly connected to the frame structure.

[0058] like Figure 13 As shown, the specific construction steps can be found in the following steps:

[0059] S1. Embed multiple boxes 14 into the concrete foundation. The diagram shows 6 boxes as embedded parts. The embedded parts are exposed at the upper connection surface. The cover plate 15 of the connection node 3 can be reliably connected to the connection surface of the embedded parts to level the foundation surface.

[0060] S2. Install the first layer of round bamboo composite columns 1, and install diagonal braces 13 between two adjacent round bamboo composite columns 1; one end of the diagonal brace 13 is fixedly connected to the upper end of one of the round bamboo composite columns 1 by bolts, and the other end of the diagonal brace 13 is fixedly connected to the lower end of the other round bamboo composite column 1 by bolts.

[0061] S3. Install the first section of the enclosure 18 on the outside of the first layer round bamboo composite column 1. The enclosure 18 can be bolted to the connection nodes 3 at both ends of the round bamboo composite column 1, so that it and the first layer frame structure form a stable whole, namely the elevator shaft.

[0062] S4. Install connection nodes 3 above the first layer round bamboo composite columns 1, and horizontally suspend round bamboo composite beams 2 between two adjacent round bamboo composite columns 1 and between round bamboo composite columns 1 and the existing building 4, so that the two ends of the round bamboo composite beams 2 are fixedly connected to the connection nodes 3, forming the first layer frame structure and corridor structure.

[0063] S5. Install the second layer of round bamboo composite columns 1 and round bamboo composite beams 2 to form the second layer frame structure and corridor structure, and install the second layer corridor floor slab (or the corridor floor slab can be installed after all beams and columns are installed).

[0064] S6. Hoist the second section of the enclosure tube 18 to the outside of the second layer of round bamboo composite column 1, so that the lower end of the second section of the enclosure tube 18 is located outside the upper end of the first section of the enclosure tube 18.

[0065] S7. Continue construction according to the above steps until the required number of floors is completed;

[0066] S8. Carry out floor construction of each connecting corridor, construction of the top surface of the frame structure and connecting corridor structure, construction of the side walls of the connecting corridor, installation of doors and windows, and appropriate decoration of the elevator shaft and the exterior of the connecting corridor.

[0067] S9. After the above civil engineering works are completed, elevator equipment installation can be carried out. Before installation, elevator doors can be cut out at the corresponding positions on the enclosure 18 as needed. Alternatively, elevator door space can be reserved in the factory according to elevator requirements to serve as a passage connecting the elevator and the corridor before elevator door installation.

[0068] The above description is a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and concept of this utility model, should be covered within the protection scope of the claims of this utility model.

Claims

1. An external elevator frame constructed of bamboo-based composite material, characterized in that: The structure includes round bamboo composite columns, round bamboo composite beams, diagonal braces, and connecting nodes. Multiple round bamboo composite columns are arranged vertically in a rectangular pattern on a concrete foundation with pre-embedded bolts. Each round bamboo composite column extends upward and is sequentially assembled with the connecting nodes and round bamboo composite columns. The two ends of the round bamboo composite beams are fixedly connected to the connecting nodes between adjacent round bamboo composite columns and between the round bamboo composite columns and the existing building, forming a cuboid shaft frame structure and a corridor structure. The corridor structure is fixedly connected to the existing building. The round bamboo composite column and round bamboo composite beam include a spliced ​​round bamboo frame, a fiber winding layer and a protective layer. The spliced ​​round bamboo frame is composed of one or more hollow round bamboos arranged alternately at their large and small ends. The fiber winding layer is wrapped around the periphery of the spliced ​​round bamboo frame, and a protective layer is provided around the periphery of the fiber winding layer. Each hollow bamboo has an external connecting rod at both ends of its inner cavity. The external connecting rod is connected to the hollow bamboo via a connecting screw. The external connecting rod and the hollow bamboo have multiple sets of through holes perpendicular to the axis for the connecting screw to pass through. The included angle between the different sets of through holes ranges from 1° to 90°. The end face of the external connecting rod is flush with the end face of the hollow bamboo. The outer end of the external connecting rod has a connecting hole. Adhesive filler is provided between the hollow bamboo and the external connecting rod.

2. The external elevator frame constructed of bamboo-based composite material according to claim 1, characterized in that: The fiber winding layer includes bamboo strips and connectors. Multiple bamboo strips are arranged side by side and bonded to the connectors to form a bamboo strip curtain. Multiple bamboo strip curtains are wound around the column surface of the assembled round bamboo frame to form the fiber winding layer. The gaps between the hollow round bamboos and between the hollow round bamboos and the fiber winding layer are filled with adhesive filler.

3. The external elevator frame constructed of bamboo-based composite material according to claim 1, characterized in that: Each layer of adjacent round bamboo composite columns is provided with a diagonal brace. One end of the diagonal brace is connected to the upper end of the round bamboo composite column, and the other end of the diagonal brace is connected to the lower end of the adjacent round bamboo composite column.

4. The external elevator frame constructed of bamboo-based composite material according to claim 1, characterized in that: The connection node includes a box body and a cover plate. The box body is hollow inside, and the top and bottom of the box body are missing to form a cylindrical shape. The cover plate can be connected to the top and bottom of the box body. The round bamboo composite column is connected to the cover plate, and the round bamboo composite beam is connected to the outer side of the box body.

5. The external elevator frame constructed of bamboo-based composite material according to claim 4, characterized in that: The edge of the cover plate is bent at 90°, and the edge of the cover plate and the sides of the upper and lower ends of the box body are provided with holes for connection and fixing.

6. The external elevator frame constructed of bamboo-based composite material according to claim 5, characterized in that: The cover plate is provided with a support auxiliary plate at the connection of the box body. The support auxiliary plate includes a connecting plate and a support plate. The connecting plate and the support plate are perpendicular to each other. The connecting plate is connected to the side of the lower end of the box body. The support plate is used to abut against the lower surface of the round bamboo composite beam connected to the side of the box body.

7. The external elevator frame constructed of bamboo-based composite material according to claim 4, characterized in that: The upper and lower ends of the box are provided with flange plates, which are flush with the upper and lower surfaces of the box. The cover plate is fixedly connected to the flange plates.

8. An external elevator enclosure structure, installed on the periphery of an external elevator frame constructed of bamboo-based composite material as described in any one of claims 1-7, characterized in that: The enclosure consists of an inner lining layer, a reinforcing layer, and an outer protective layer, arranged sequentially from the inside out. The upper and lower edges of the enclosure are provided with interlocking fasteners.

9. The external elevator enclosure structure according to claim 8, characterized in that: The connecting buckle includes a male head and a female head. The male head is located on the upper side of the enclosure tube, and the female head is located on the lower side of the enclosure tube. When the female head and the male head are connected, the female head covers the outside of the male head.

10. An external elevator enclosure structure according to claim 8, characterized in that: The enclosure tube has a first through hole for the round bamboo composite beam to pass through and a doorway adapted to the elevator door on the side closest to the existing building.

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