Spiral curve belt conveyor for airport luggage conveying

Abstract

The utility model discloses a spiral curve belt conveyor for airport luggage conveying. The spiral curve belt conveyor comprises a spiral rack, a driving mechanism and a guiding mechanism. A supporting plate is fixed to the top face of the spiral rack, and a mounting gap is formed between the outer arc face of the supporting plate and the outer arc face of the spiral rack. The driving mechanism comprises a driving roller, a tail roller and a conveying belt, the driving roller and the tail roller are rotationally connected to the two ends of the spiral rack respectively, and the conveying belt is arranged on the driving roller and the tail roller in a sleeving mode to convey luggage; and the guide mechanism is fixedly mounted in the gap and comprises a plurality of arc-shaped guide rails which are arranged in parallel up and down so as to guide the conveying path of the conveying belt. The supporting plate is not directly connected with the outer side wall of the rack, the machining difficulty of the supporting plate is reduced, the structure is simple and stable, and the installation gap between the supporting plate and the outer side wall facilitates installation and later maintenance of the guide mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of airport logistics, and more particularly to a spiral curved belt conveyor for airport luggage transportation. Background Art

[0002] In airport baggage handling systems, the conventional method of achieving baggage turning + climbing or turning + downhill conveying is to use a combination of multiple devices, including a flat bending machine and an uphill or downhill conveyor. However, a spiral curved belt conveyor can achieve this function with just one device. Spiral curved belt conveyors are increasingly widely used in airport baggage handling systems because they can achieve different floor heights and 90-degree or 180-degree conveying within a limited space.

[0003] With the booming development of the aviation industry, airports have increasingly higher requirements for baggage handling equipment, especially for the stability of screw conveyors, equipment operating noise, and convenience of equipment maintenance. Therefore, providing a spiral curved belt conveyor with stable operation, low noise, and easy maintenance has become an urgent problem to be solved in this field. Utility Model Content

[0004] In view of this, the utility model provides a spiral curved belt conveyor for airport baggage transportation, aiming to solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A spiral curved belt conveyor for airport luggage transportation, comprising a spiral frame, a driving mechanism and a guide mechanism;

[0007] A supporting plate with a spiral surface is fixed to the top surface of the spiral frame, and multiple pieces of sound-absorbing cotton are fixed to the bottom surface of the supporting plate. An installation gap is defined between the outer arc surface of the supporting plate and the outer arc surface of the spiral frame. The driving mechanism comprises a driving roller, a tail roller, and a conveyor belt. The driving roller and the tail roller are rotatably connected to the two ends of the top of the spiral frame respectively. The conveyor belt is sleeved on the driving roller and the tail roller to convey luggage. The guide mechanism is fixed in the installation gap. The guide mechanism comprises a plurality of arc-shaped guide rails arranged in parallel in the upper and lower directions in the installation gap to guide the conveying path of the conveyor belt.

[0008] The beneficial effect of the above technical solution is that the support plate of the spiral frame is not directly connected to its outer arc surface, which reduces the difficulty of processing the support plate. The installation gap facilitates the installation and maintenance and replacement of the guide mechanism during operation, and the sound-absorbing cotton can reduce the noise of the chain operation on the conveyor belt.

[0009] Preferably, the spiral frame includes an inner side, an outer side, a connecting beam, and a support plate bracket. The inner side is the inner curved surface of the spiral frame, and the outer side is the outer curved surface of the spiral frame. The ends of the plurality of connecting beams are respectively fixed to the bottom ends of the two opposite side walls of the inner side and the outer side. The support plate is fixed to the top surface of the support plate bracket. The outer curved surface of the support plate and the inner wall of the outer side are formed between the mounting gap. The bottom ends of the inner side and the outer side are connected by the connecting beam, and the top ends are connected by the support plate bracket. This has a simple structure and stable operation.

[0010] Preferably, sprockets are fixed to the ends of the drive roller and the tail roller that face each other within the installation gap, a chain is fixed to the outer curved surface of the conveyor belt, the chain is drivingly connected to the sprockets, and a motor is fixed to the outer wall of the outer side and drivingly connected to the drive roller to drive the rotation of the conveyor belt. The drive roller actively rotates under the drive of the motor, while the tail roller rotates passively. The chain on the conveyor belt cooperates with the sprockets on the drive roller and the tail roller to convey luggage on the conveyor belt. The conveying direction of the conveyor belt can be changed by adjusting the relative position of the drive roller and the tail roller.

[0011] Preferably, the guide mechanism includes an upper guide rail, a return upper guide rail and a return lower guide rail, and the pallet bracket is fixed with an L-shaped fixing plate on the top surface relative to the installation gap, and an assembly cavity is formed between the L-shaped notch of the fixing plate and the upper inner wall of the outer side panel, and the upper guide rail is fixed on the panel of the fixing plate facing the outer side panel to guide the chain relative to the upper part of the pallet; the return upper guide rail is fixed to the middle part of the inner wall of the outer side panel through the return upper bracket, and the return lower guide rail is fixed to the lower part of the inner wall of the outer side panel through the return lower bracket, and the return upper guide rail and the return lower guide rail guide the chain relative to the lower part of the pallet. The upper guide rail is connected to the supporting plate through the fixed plate, and the return upper guide rail and the return lower guide rail are respectively connected to the outer side rails. The upper guide rail, the return upper guide rail and the return lower guide rail are split into a separate design, so that in the later maintenance, only the return upper guide rail and the return lower guide rail need to be replaced, which reduces the later maintenance cost. When replacing, the return upper guide rail and the return lower guide rail can be pulled out or inserted from the gap between the two adjacent connecting beams under the frame, without moving the spiral curved belt conveyor, which is convenient for later maintenance.

[0012] Preferably, an oil receiving pan is fixed on the top surface of the connecting beam below the return lower guide rail, and the oil receiving pan can collect lubricating oil dripping from the chain.

[0013] Preferably, the device further comprises an upper cover plate, which is fixed to the side wall of the outer side panel and covers the assembly cavity. A pressure strip is fixed to the bottom surface of the upper cover plate, and a plurality of sound-absorbing cotton pieces are fixed to the bottom surface. The pressure strip can prevent the conveyor chain from colliding with the upper cover plate during operation, ensuring that the conveyor chain in the conveying direction can always cooperate with the upper guide rail for guidance. At the same time, the sound-absorbing cotton on the upper cover plate can also reduce noise during conveyor operation.

[0014] Preferably, a lower guard plate is detachably connected to the bottom surface of the connecting beam, and multiple pieces of the sound-absorbing cotton are fixed to the top surface of the lower guard plate. This improves the safety factor of the conveyor, and the detachable lower guard plate facilitates the repair and maintenance of the guide mechanism. The sound-absorbing cotton on the lower guard plate further reduces noise during conveyor operation.

[0015] Preferably, the inner and outer arc surfaces of the spiral frame are both fixed with side guard plates. The side guard plates on the outer arc surface of the spiral frame can be connected to the upper cover plate, and the side guard plates can prevent luggage from falling during transportation, ensuring the safety of passengers' property.

[0016] Preferably, a return roller is provided at the bottom of the spiral frame, and the return roller is in rolling contact with the conveyor belt relative to the bottom surface of the support plate. The conveyor belt is supported by the return roller to ensure the stability of the conveyor during operation.

[0017] Preferably, a plurality of legs are fixed perpendicular to the bottom surface of the spiral frame.

[0018] As can be seen from the above technical solution, compared with the prior art, the present invention provides a spiral curved belt conveyor for airport baggage transportation, in which the support plate is not directly connected to the outer side of the frame, thereby reducing the difficulty of processing the support plate, and the structure is simple and stable. The installation gap between the support plate and the outer side facilitates the installation and subsequent maintenance of the guide mechanism.

[0019] In addition to the noise of the motor, the coordination between the chain and sprocket, as well as the restriction of the chain by the guide mechanism are the main sources of conveyor noise. By installing multiple pieces of sound-absorbing cotton in different arrangements on the conveyor, the noise during the conveyor operation can be effectively reduced.

[0020] The return upper guide rail bracket and the return upper guide rail, as well as the return lower guide rail bracket and the return lower guide rail are designed to be divided into two parts, so that in later maintenance, only the return upper guide rail and the return lower guide rail need to be replaced, which reduces the later maintenance cost. During replacement, the return upper guide rail and the return lower guide rail can be pulled out or inserted from under the frame without moving the conveyor, which is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the conveyor structure provided by the utility model;

[0023] Figure 2 for Figure 1 AA section view in;

[0024] Figure 3 A schematic diagram of the guide mechanism provided by the utility model;

[0025] Figure 4 A schematic diagram of the spiral frame structure provided by the utility model;

[0026] Figure 5 for Figure 4 BB cross-sectional view in;

[0027] Figure 6 A schematic diagram of the driving mechanism provided by the utility model;

[0028] Figure 7 The utility model provides a schematic diagram of the driving roller structure.

[0029] in,

[0030] 1- spiral frame; 11- support leg; 12- inner side; 13- support plate; 14- support plate bracket; 15- connecting beam; 16- outer side; 17- fixed plate;

[0031] 2-side guards;

[0032] 3-Guide mechanism; 31-Upper guide rail; 32-Upper cover; 33-Pressing strip; 34-Return upper guide rail; 35-Return upper bracket; 36-Return lower guide rail; 37-Return lower bracket;

[0033] 4- driving mechanism; 41- driving roller; 42- tail roller; 43- sprocket; 44- chain; 45- conveyor belt; 46- motor;

[0034] 5-sound-absorbing cotton;

[0035] 6-Return roller;

[0036] 7-lower guard plate;

[0037] 8-Oil drain pan. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See attached Figures 1 to 7 , the embodiment of the utility model discloses a spiral curved belt conveyor for airport luggage transportation, comprising a spiral frame 1, a driving mechanism 4 and a guide mechanism 3;

[0040] A spiral-shaped support plate 13 is fixed to the top surface of the spiral frame 1, and multiple sound-absorbing cottons 5 are fixed to the bottom surface of the support plate 13. There is an installation gap between the outer arc surface of the support plate 13 and the outer arc surface of the spiral frame 1; the driving mechanism 4 includes a driving roller 41, a tail roller 42 and a conveyor belt 45. The driving roller 41 and the tail roller 42 are rotatably connected to the two ends of the top of the spiral frame 1 with the support plate 13 respectively, and the conveyor belt 45 is sleeved on the driving roller 41 and the tail roller 42 to convey luggage; the guide mechanism 3 is fixed in the installation gap, and the guide mechanism 3 includes a plurality of arc guide rails arranged in parallel in the installation gap to guide the conveying path of the conveyor belt 45.

[0041] like Figure 4 As shown, the spiral frame 1 includes an inner side gang 12, an outer side gang 16, a connecting beam 15 and a support plate bracket 14. The inner side gang 12 is the inner arc surface of the spiral frame 1, and the outer side gang 16 is the outer arc surface of the spiral frame 1. The two ends of the multiple connecting beams 15 are respectively fixed to the bottom ends of the two side walls opposite to the inner side gang 12 and the outer side gang 16. The support plate bracket 14 is fixed to the top of the two side walls opposite to the inner side gang 12 and the outer side gang 16. The support plate 13 is fixed to the top surface of the support plate bracket 14. An installation gap is formed between the outer arc surface of the support plate 13 and the inner wall of the outer side gang 16. The driving roller 41 and the tail roller 42 are rotatably connected to the two ends of the spiral frame 1 opposite to the support plate 13. The conveyor belt 45 is connected end to end to form a closed loop and is sleeved on the driving roller 41 and the tail roller 42. The support plate 13 is located in the annular cavity formed by the conveyor belt 45.

[0042] The support plate bracket and the connecting beam are spirally distributed at a certain angle between the inner side and the outer side, which is adapted to the shape of the spiral frame; the inner wall of the inner side is welded and fixed to the inner arc surface of the support plate and the inner arc end of the support plate bracket, and the outer side is welded and fixed to the outer arc end of the support plate bracket. The bottom ends of the inner side and the outer side are connected by a connecting beam, which can be an angle steel.

[0043] In order to further optimize the above technical solution, all components of the spiral rack are made of sheet metal, which has a simple and stable structure. The support plate is not directly connected to the outer side, which reduces the difficulty of processing the support plate. The guide mechanism is fixed in the installation gap, which facilitates the subsequent maintenance and replacement of the guide mechanism.

[0044] In order to further optimize the above technical solution, Figure 6 and 7 As shown, sprockets 43 are fixed to the ends of the driving roller 41 and the tail roller 42 within the relative installation gap, and a chain 44 is fixed to the outer arc surface of the conveyor belt 45. The chain 44 is transmission-connected to the sprocket 43, and the motor 46 is fixed to the outer wall of the outer gang 16 and transmission-connected to the driving roller 41 to drive the rotation of the conveyor belt 45.

[0045] like Figure 1 and 4 As shown, corresponding notches are provided at both ends of the outer and inner sides, with the drive roller and tail roller rotatably connected within these notches. The drive roller is connected to a motor, which drives the drive roller to rotate. During rotation, the drive roller drives the conveyor belt via the sprocket and chain, while the tail roller acts as a slave. The conveyor belt's conveying direction can be adjusted by adjusting the relative position of the drive roller and tail roller, or by adjusting the forward or reverse rotation of the motor.

[0046] In order to further optimize the above technical solution, since the conveyor belt is transmitted through the sprockets at both ends and the chain on the conveyor belt, no support is set in the middle of the conveyor belt. Therefore, in order to ensure the normal operation of the conveyor belt, a guide mechanism is set to guide the middle of the conveyor belt. The guide mechanism 3 includes an upper guide rail 31, a return upper guide rail 34 and a return lower guide rail 36. The top surface of the support plate bracket 14 relative to the installation gap is fixed with an L-shaped fixing plate 17, and an assembly cavity is formed between the L-shaped notch of the fixing plate 17 and the upper inner wall of the outer side gang 16. The upper guide rail 31 is fixed on the panel of the fixing plate 17 facing the outer side gang 16 to guide the chain 44 above the relative support plate 13; the return upper guide rail 34 is fixed to the middle of the inner wall of the outer side gang 16 through the return upper bracket 35, and the return lower guide rail 36 is fixed to the lower part of the inner wall of the outer side gang 16 through the return lower bracket 37. The return upper guide rail 34 and the return lower guide rail 36 guide the chain 44 below the relative support plate 13.

[0047] like Figure 3 and 5As shown, the pallet bracket forms a bending structure toward the installation gap at the end portion close to the installation gap, an L-shaped fixing plate is fixed at the end portion of the bending mechanism of the pallet bracket, the fixing plate abuts against the inner wall of the outer side panel, an assembly cavity is formed between the L-shaped notch of the fixing plate and the inner wall of the inner side panel, the upper guide rail is arranged in the assembly cavity and fixed on the panel of the fixing plate toward the outer side panel, a notch is formed on the upper guide rail, the chain of the conveyor belt relative to the upper portion of the pallet passes through the notch of the upper guide rail, and the conveying direction of the conveyor belt is guided by the upper guide rail;

[0048] The structure of the return upper bracket is similar to that of the fixed plate, which is equivalent to the fixed plate being mirrored and fixed on the middle of the inner wall of the inner side, and the return upper guide rail is fixed on the panel of the return upper bracket facing the outer side; the return lower bracket mechanism is the same as the fixed plate structure, and the return lower guide rail is fixed on the inner wall of the return lower bracket facing the outer side, and there is a gap between the return upper guide rail and the return lower guide rail. The return upper guide rail is provided with a slot, and the chain in the return direction of the conveyor belt (the chain under the support plate) is placed in the slot, and the return of the conveyor belt is guided by the return upper guide rail and the return lower guide rail.

[0049] In this embodiment, the conveyor belt is guided in the conveying direction by an arc-shaped upper guide rail, and the conveyor belt is guided in the return direction by a return upper guide rail and a return lower guide rail. The upper guide rail, the return upper guide rail, and the return lower guide rail are not connected to each other and are designed as separate parts, which facilitates the maintenance of the guide mechanism. During the daily operation of the conveyor, the return upper guide rail and the return lower guide rail are easily consumable parts. When the return upper guide rail needs to be replaced, the return upper bracket is first separated from the outer side, and then the return upper guide rail is separated from the return upper bracket. The removed return upper guide rail can be pulled out from the gap between the two adjacent connecting beams at the bottom of the spiral frame, and the new return upper guide rail is inserted into the gap between the two adjacent connecting beams. The new return upper guide rail is first connected to the return upper bracket, and then the return upper bracket is connected to the outer side. The replacement process of the return lower guide rail is the same as that of the return upper guide rail, and the conveyor does not need to be moved during the replacement process.

[0050] In order to further optimize the above technical solution, the upper guide rail, the return upper guide rail and the return lower guide rail are made of polymer wear-resistant material, so that they have a certain elasticity, which is convenient for extraction or insertion from the bottom of the spiral rack.

[0051] In this embodiment, side guard plates 2 are fixed to the top of the inner and outer arc surfaces of the spiral frame 1. The side guard plates can ensure that the luggage is always on the conveyor belt during transportation, preventing the luggage from falling off the conveyor and causing property loss to passengers.

[0052] In order to further optimize the above technical solution, an oil collecting pan 8 is fixed to the top surface of the connecting beam 15 below the return lower guide rail 36. The oil collecting pan is spiral and located at the lower end of the return lower guide rail to collect the lubricating oil dripping from the chain.

[0053] To further optimize the above technical solution, an upper cover 32 is also included. This upper cover 32 is fixed to the sidewall of the outer side panel 16 and covers the assembly cavity. A pressure strip 33 is fixed to the bottom surface of the upper cover 32, and multiple pieces of sound-absorbing cotton 5 are fixed to the bottom surface. The upper cover is a "7"-shaped plate that can cover the upper surface of the assembly cavity. The upper cover can be connected to the side guard plate located at the top of the outer side panel. The sound-absorbing cotton can reduce noise during chain transmission.

[0054] In order to further optimize the above technical solution and ensure the safety factor of the conveyor operation, the bottom surface of the connecting beam 15 is detachably connected to the lower guard plate 7, and the top surface of the lower guard plate 7 is fixed with multiple pieces of sound-absorbing cotton 5.

[0055] In this embodiment, multiple pieces of sound-absorbing cotton are installed on the bottom surface of the support plate, or the bottom surface of the upper cover plate, or the top surface of the lower guard plate. The sound-absorbing cotton is used to reduce the noise during the operation of the conveyor, mainly the noise generated during the chain transmission process, and the noise of the conveyor operation can be reduced to below 70 decibels.

[0056] In order to further optimize the above technical solution and ensure the stability of the conveyor belt during operation, a return roller 6 is provided at the bottom of the spiral frame 1. The return roller 6 rolls against the conveyor belt 45 on the bottom surface of the relative support plate 13. The return roller is supported below the conveyor belt to ensure the stable operation of the conveyor.

[0057] To further optimize the above technical solution, a plurality of legs 11 are fixed to the bottom surface of the vertical spiral frame 1. The legs are telescopic and the height of the legs can be freely adjusted. By adjusting the legs, the conveyor can be arranged at an angle to achieve different floor heights and 90-degree or 180-degree conveying, ensuring that luggage can be transported around turns and climbs, or around turns and downhill.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0059] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spiral curved belt conveyor for airport baggage transportation, characterized in that: It comprises a spiral frame (1), a driving mechanism (4) and a guiding mechanism (3); A supporting plate (13) with a spiral surface is fixed on the top surface of the spiral frame (1), and a plurality of sound-absorbing cottons (5) are fixed on the bottom surface of the supporting plate (13). An installation gap is provided between the outer arc surface of the supporting plate (13) and the outer arc surface of the spiral frame (1); the driving mechanism (4) comprises a driving roller (41), a tail roller (42) and a conveyor belt (45); the driving roller (41) and the tail roller (42) are respectively rotatably connected to the two ends of the top of the spiral frame (1); the conveyor belt (45) is sleeved on the driving roller (41) and the tail roller (42) to convey luggage; the guide mechanism (3) is fixed in the installation gap, and the guide mechanism (3) comprises a plurality of arc guide rails arranged in the installation gap and arranged in parallel up and down to guide the conveying path of the conveyor belt (45).

2. The spiral curved belt conveyor for airport baggage transportation according to claim 1, characterized in that: The spiral frame (1) comprises an inner side panel (12), an outer side panel (16), a connecting beam (15) and a supporting plate bracket (14); the inner side panel (12) is the inner arc surface of the spiral frame (1); the outer side panel (16) is the outer arc surface of the spiral frame (1); the two ends of the plurality of connecting beams (15) are respectively fixed to the bottom ends of the two side walls opposite to the inner side panel (12) and the outer side panel (16); the supporting plate bracket (14) is fixed to the top ends of the two side walls opposite to the inner side panel (12) and the outer side panel (16); the supporting plate (13) is fixed to the top surface of the supporting plate bracket (14); and the installation gap is formed between the outer arc surface of the supporting plate (13) and the inner wall of the outer side panel (16).

3. The spiral curved belt conveyor for airport baggage transportation according to claim 2, characterized in that: Sprockets (43) are fixed to the ends of the driving roller (41) and the tail roller (42) relative to the installation gap, a chain (44) is fixed to the outer arc surface of the conveyor belt (45), and the chain (44) is transmission-connected to the sprocket (43). A motor (46) is fixed to the outer wall of the outer side (16) and transmission-connected to the driving roller (41) to drive the rotation of the conveyor belt (45).

4. The spiral curved belt conveyor for airport baggage transportation according to claim 3, characterized in that: The guide mechanism (3) includes an upper guide rail (31), a return upper guide rail (34) and a return lower guide rail (36); an L-shaped fixing plate (17) is fixed to the top surface of the support plate bracket (14) relative to the installation gap; an assembly cavity is formed between the L-shaped notch of the fixing plate (17) and the upper inner wall of the outer side (16); the upper guide rail (31) is fixed to the panel of the fixing plate (17) facing the outer side (16) to align with the outer side. The chain (44) above the support plate (13) is guided; the return upper guide rail (34) is fixed to the middle of the inner wall of the outer side (16) through the return upper bracket (35), and the return lower guide rail (36) is fixed to the lower part of the inner wall of the outer side (16) through the return lower bracket (37). The return upper guide rail (34) and the return lower guide rail (36) guide the chain (44) below the support plate (13).

5. The spiral curved belt conveyor for airport baggage transportation according to claim 4, characterized in that: An oil receiving pan (8) is fixed to the top surface of the connecting beam (15) below the return lower guide rail (36).

6. The spiral curved belt conveyor for airport baggage transportation according to claim 4, characterized in that: It also includes an upper cover plate (32), which is fixed to the side wall of the outer side (16) and covers the assembly cavity. A pressure strip (33) is fixed to the bottom surface of the upper cover plate (32), and a plurality of sound-absorbing cottons (5) are fixed to the bottom surface.

7. The spiral curved belt conveyor for airport baggage transportation according to claim 2, characterized in that: The bottom surface of the connecting beam (15) is detachably connected to a lower guard plate (7), and a plurality of pieces of the sound-absorbing cotton (5) are fixed to the top surface of the lower guard plate (7).

8. The spiral curved belt conveyor for airport baggage transportation according to claim 1, characterized in that: Side guard plates (2) are fixed to the top ends of the inner and outer arc surfaces of the spiral frame (1).

9. The spiral curved belt conveyor for airport baggage transportation according to claim 1, characterized in that: A return roller (6) is provided at the bottom of the spiral frame (1), and the return roller (6) is in rolling contact with the conveyor belt (45) relative to the bottom surface of the support plate (13).

10. The spiral curved belt conveyor for airport baggage transportation according to claim 1, characterized in that: A plurality of supporting legs (11) are fixed perpendicular to the bottom surface of the spiral frame (1).

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