Suspension bridge type folding transportation stair suitable for narrow fat groove outer wall scaffold

Abstract

The invention discloses a suspension bridge type folding transportation stair suitable for a narrow fat groove outer wall scaffold. The suspension bridge type folding transportation stair comprises a tray set, a stair section set and a locking set. An angle is formed between the stair-state stair section group and the N layer, and the locking group is connected with the locking plate frame of the top tray arranged on the N + 1 layer through the locking group to form an ascending stair or a descending stair; one end, far away from the bottom tray, of the flat plate state ladder section group is lapped on the N layers of scaffolds far away from the bottom tray to form a horizontal channel with the N layers of scaffolds; in the operation process of the fertilizer trough, climbing and descending stair sections can be formed through the stair state, and under the condition of operation cooperation, the effects of being capable of being used repeatedly, detachable and convenient to maintain can be achieved through cheap materials in the simplest mechanical structure; by means of the arrangement of the flat plate state, horizontal transportation operation of the current layer can be achieved without delaying the channel of the current layer, and due to the fact that the narrow fertilizer groove cannot enter a large machine to work in a matched mode, the advantages of the stair can be enlarged to the maximum extent through the mechanical, variable and detachable stair.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and more particularly to a suspension bridge type folding transport staircase suitable for narrow fat trough external wall scaffolding. Background Art

[0002] The fat trough refers to the part that is excavated extra to provide a working surface. Generally speaking, it refers to the space between the outer wall of the basement or foundation of a building and the edge of the foundation pit. The fat trough refers to the part that is excavated extra to provide a working surface. Generally speaking, it refers to the space between the outer wall of the basement or foundation of a building and the edge of the foundation pit.

[0003] In today's building basement construction, most buildings need to excavate foundation pits. Under the current context of cost reduction and efficiency improvement in the construction industry, the size of the foundation pits of most projects will not exceed the size of the basement by much, in order to avoid the extra cost waste caused by over-excavation and backfilling; therefore, narrow fertilizer troughs are the mainstream for fertilizer troughs on the exterior walls of most basements.

[0004] The general narrowing of fertilizer troughs has brought great restrictions on the vertical transportation methods between working floors. Currently, most vertical transportation of fertilizer troughs is still mainly carried out by slings and personnel climbing poles, which has a significant impact on the continuity and safety of transportation. In addition, the narrow slings have restrictions on the size and weight of objects in a single trip, making it difficult to transport complete long bundles of waterproof membranes and other extra-long and overweight objects.

[0005] Although the fixed-shaped staircase with spiral staircase can solve the problem of transportation continuity, it cannot be turned over and the existence of the fixed staircase blocks the access of people to the working layer under the steps, which will cut off the working layer vertically and thus block the horizontal transportation of the working layer. Summary of the invention

[0006] The purpose of the present invention is to provide a suspension bridge type folding transport staircase suitable for narrow fat trough external wall scaffolding, which is a movable folding staircase capable of having two states of ascending and laying flat in the narrow fat trough.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: a suspension bridge type folding transport staircase suitable for narrow fat trough external wall scaffolding, comprising a pallet group, a ladder group and a locking group;

[0008] The pallet group includes a top pallet arranged on the N+1 layer and a bottom pallet arranged on the N layer, the top pallet is detachably connected to the scaffold at both sides, locking plate frames are symmetrically arranged on both sides of the top pallet, and the bottom pallet is detachably connected to the scaffold at both sides;

[0009] One end of the ladder segment set is hinged on the bottom tray, and the other end is detachably arranged on the top tray, the ladder segment set comprises a locking end located away from the bottom tray and a hinged end located on the bottom tray, and the locking end can be fixed on the top tray;

[0010] The locking group is arranged at the locking end and can be fixedly connected with the top tray, the locking group includes guide plates arranged on both sides of the locking end of the ladder group, the guide plates are provided with locking plates, the locking plates are provided with rotating guide rods that can make the locking plates move laterally, the rotating guide rods are rotatably arranged on the hinged end, the end of the rotating guide rod away from the locking plate is hinged with a movable pull rod, and the end of the movable pull rod away from the locking plate is provided with a handle;

[0011] Wherein, the tray group, the staircase group and the locking group can form a staircase state and a flat plate state;

[0012] In the staircase state, the staircase group forms an angle with the Nth floor, and the locking group is connected with the locking plate frame of the top tray arranged on the N+1th floor through the locking group to form an ascending staircase or a descending staircase;

[0013] In a flat plate state, one end of the stair set away from the bottom tray is overlapped on an N-layer scaffold away from the bottom tray to form a horizontal corridor with the N-layer scaffold.

[0014] During the operation of the fertilizer trough, the stairs can form climbing and descending steps. Through the coordination of operations, the simplest mechanical structure can be made to be reusable, detachable and easy to maintain through cheap materials. The flat plate setting can also achieve horizontal transportation operations on the current floor without delaying the corridor of the current floor. Among them, precisely because the narrow fertilizer trough cannot enter the large-scale machinery to cooperate with the work, the mechanical, variable and detachable stairs can maximize the advantages of this staircase. Usually, the narrow fertilizer trough can only accommodate one person after the scaffolding is built. By providing a gap with two states for use, the effect of maximizing the use of space can be achieved. When the stairs are combined with the scaffolding to form a working platform, it can achieve unlimited number of trips and more flexible continuous transportation of objects under the same time and working conditions.

[0015] The present invention is further configured as follows: the locking plate frame is a plate-shaped structure, and a strip-shaped locking hole is provided on the bottom surface of the locking plate frame close to the top pedal.

[0016] The strip-shaped lock hole setting can distribute the shear force caused by the deadweight and the load, so that the lock plate has a greater bearing capacity, and at the same time correspondingly increases the bearing capacity of the lock plate frame, and reduces the possibility of damage to the lock hole part of the lock plate frame.

[0017] The present invention is further configured as follows: the stair segment group includes four stair segment main beams parallel to each other and a plurality of rotating pedals arranged along the axial direction of the stair segment main beams, each of the rotating pedals is rotatably connected to each of the stair segment main beams to form a stair segment group that can be laid flat to form a flat plate and inclined to form a step ladder; a secondary pedal is arranged at the hinged end of the stair segment main beam.

[0018] A parallelogram-shaped staircase can be formed by parallel main beams of the stair sections. The structural setting of the frame and the rotating pedals can make the opening angle of each step the same, while increasing safety and preventing falls caused by missing steps or misaligned stepping positions.

[0019] The present invention is further configured as follows: the rotating pedal comprises a flat plate portion and a connecting portion perpendicular to the flat plate portion, and the connecting portion is arranged on the bottom surface of the flat plate portion and located on a side close to the top tray.

[0020] The arrangement of the flat plate portion and the connecting portion can effectively coordinate with the formation of the main beam of the stair section so that each rotating pedal forms the same angle, the same slope, and the same direction, and can also synchronously form a small gap flat plate when folded, thereby preventing the occurrence of empty steps in the flat plate state.

[0021] The present invention is further configured such that the length of the connecting portion, the thickness of the flat plate portion and the diameter of the stair section main beam are of the same size.

[0022] By setting the same size, a good flat plate effect can be achieved after being laid flat, which prevents unevenness caused by turning the pedal at a certain angle after the flat plate is in the flat state. If the flat plate is uneven or has jagged edges, it is easy to cause workers to fall.

[0023] The present invention is further configured as follows: a bottom pedal is provided on the bottom tray, a raised portion is provided on the top surface of the bottom tray, the bottom pedal is provided on the raised portion, and the height of the raised portion is equal to the height of the diameters of the two stair section main beams.

[0024] By setting the heightening part, the bottom tray can be effectively raised to the height of a stair section main beam to achieve the heightening effect. After the heightening, the diameter of the stair section main beam can be redundant so that the flat plate state after being flattened can better fit the plane effect of this level and prevent the protrusion of the rotating pedal.

[0025] The present invention is further configured as follows: guide plates are provided on both sides of the secondary pedal, wherein two spaced guide plates are provided on the right side of the secondary pedal, the rotating guide rod is provided between the two guide plates, and two fixed plates are provided at positions corresponding to the rotating guide rods on the top surface of the secondary pedal, the rotating guide rods are rotatably sleeved on the two fixed plates, a movable pull rod is hingedly provided at the end of the rotating guide rod close to the hinged end of the stair section group, and a handle of an annular structure is provided at the end of the movable pull rod close to the hinged end of the stair section group, and when in a flat state, the handle can be clamped on the height-increasing portion.

[0026] The guide plate arranged on the secondary pedal can provide load-bearing capacity when locked with the top pedal. The arrangement of multiple guide plates is to enable the locking plate to still be parallel to the secondary pedal in the unlocked state, thereby preventing interference with the next use. Maintaining the parallel state at all times can quickly meet the next locking use.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. During the operation of the fertilizer trough, the stairs can form climbing and descending steps. Through the coordination of operations, the simplest mechanical structure can be made of cheap materials to achieve the effect of multiple use, disassembly and easy maintenance.

[0029] 2. The flat plate setting can realize the horizontal transportation operation of the current layer without delaying the corridor of the current layer. Among them, because the narrow fertilizer trough cannot enter the large-scale machinery to work together, the mechanical, variable and detachable stairs can maximize the advantages of this staircase.

[0030] 3. Usually, a narrow trough can only accommodate one person after the scaffolding is built. By providing a gap with two states of use, the effect of maximizing the use of space can be achieved.

[0031] 4. When this staircase is combined with a scaffold to form a working platform, it can achieve continuous transportation with unlimited number of trips and more flexible object sizes under the same time and working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a three-dimensional unfolded view of the staircase in the embodiment of the present invention;

[0033] Figure 2 In the embodiment of the present invention Figure 1 A in the enlarged view;

[0034] Figure 3 In the embodiment of the present invention Figure 1 The enlarged view of point B in the figure;

[0035] Figure 4 In the embodiment of the present invention Figure 1 Enlarged view of point C in the figure.

[0036] In the figure:

[0037] 1. Tray assembly; 11. Top pedal; 12. Fastener; 13. Locking plate frame; 14. Bracket; 15. Bottom pedal;

[0038] 2. Stair segment group; 21. Stair segment main beam; 22. Rotating pedal; 23. Secondary pedal;

[0039] 3. Locking group; 31. Movable pull rod; 32. Handle; 321. Bayonet; 33. Hinge; 34. Lock plate; 35. Rotating guide rod; 36. Fixed plate; 37. Guide plate; 38. Tenon. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that if the terms "first", "second", etc. are involved in the specification and claims of the present invention and the above-mentioned drawings, they are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, if the terms "including" and "having" and any of their variations are involved, it is intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] In addition, in the present invention, the terms "installed", "set", "provided with", "connected", "connected", "socketed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] The following is combined with Figure 1-4 The present invention is described in further detail.

[0046] Example

[0047] In today's building basement construction, most buildings need to excavate foundation pits. Under the current context of cost reduction and efficiency improvement in the construction industry, the size of the foundation pits of most projects will not exceed the size of the basement by much, in order to avoid the extra cost waste caused by over-excavation and backfilling; therefore, narrow fertilizer troughs are the mainstream for fertilizer troughs on the exterior walls of most basements.

[0048] The general narrowing of fertilizer troughs has brought great restrictions on the vertical transportation methods between working floors. Currently, most vertical transportation of fertilizer troughs is still mainly carried out by slings and personnel climbing poles, which has a significant impact on the continuity and safety of transportation. In addition, the narrow slings have restrictions on the size and weight of objects in a single trip, making it difficult to transport complete long bundles of waterproof membranes and other extra-long and overweight objects.

[0049] Although the fixed-shaped staircase with spiral buckle can solve the problem of transportation continuity, it cannot be turned over and the existence of the fixed staircase blocks the access of personnel to the working layer under the steps. It will cut off the working layer vertically and thus block the horizontal transportation of the working layer. This will increase the difficulty and complexity of construction for personnel. The fertilizer trough needs to be partitioned vertically to solve this problem.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a suspension bridge type folding transport staircase suitable for narrow and thick trough external wall scaffolding includes a pallet group 1, a ladder group 2 and a locking group 3.

[0051] The pallet group 1 includes a top pallet arranged on the N+1 layer and a bottom pallet arranged on the N layer. Both sides of the top pallet are detachably connected to the scaffolding. Locking plates 34 frames 13 are symmetrically arranged on both sides of the top pallet, and both sides of the bottom pallet are detachably connected to the scaffolding.

[0052] The top tray can be connected to the scaffolding by conventional fasteners 12, which can be installed very economically and can also match the proficiency of the installers to achieve fast and efficient installation and fixation.

[0053] One end of the ladder set 2 is hinged on the bottom tray, and the other end is detachably arranged on the top tray. The ladder set 2 includes a locking end located away from the bottom tray and a hinged end located on the bottom tray, and the locking end can be fixed on the top tray.

[0054] The locking group 3 is arranged at the locking end and can be fixedly connected with the top tray. The locking group 3 includes guide plates 37 arranged on both sides of the locking end of the ladder group 2. A locking plate 34 is arranged on the guide plate 37. A rotating guide rod 35 capable of causing the locking plate 34 to move laterally is arranged on the locking plate 34. The rotating guide rod 35 is rotatably arranged on the hinged end. A movable pull rod 31 is hinged at one end of the rotating guide rod 35 away from the locking plate 34. A handle 32 is arranged at a section of the movable pull rod 31 away from the locking plate 34.

[0055] Among them, the tray group 1, the staircase group 2 and the locking group 3 can form a staircase state and a flat plate state;

[0056] In the staircase state, the staircase group 2 forms an angle with the Nth floor, and the locking group 3 is connected to the locking plate 34 frame 13 of the top tray arranged on the N+1th floor through the locking group 3 to form an ascending staircase or a descending staircase.

[0057] In the flat plate state, one end of the stair set 2 away from the bottom tray is overlapped on the N-layer scaffolding away from the bottom tray to form a horizontal corridor with the N-layer scaffolding.

[0058] During the operation of the fertilizer trough, the stairs can form climbing and descending steps. Through the coordination of operations, the simplest mechanical structure can be made to be reusable, detachable and easy to maintain through cheap materials. The flat plate setting can also achieve horizontal transportation operations on the current floor without delaying the corridor of the current floor. Among them, precisely because the narrow fertilizer trough cannot enter the large-scale machinery to cooperate with the work, the mechanical, variable and detachable stairs can maximize the advantages of this staircase. Usually, the narrow fertilizer trough can only accommodate one person after the scaffolding is built. By providing a gap with two states for use, the effect of maximizing the use of space can be achieved. When the stairs are combined with the scaffolding to form a working platform, it can achieve unlimited number of trips and more flexible continuous transportation of objects under the same time and working conditions.

[0059] The locking plate 34 frame 13 is a plate-like structure, and a strip-shaped locking hole is provided at the bottom surface of the locking plate 34 frame 13 near the top pedal 11. The locking hole is provided at the bottom of the top pedal 11 because, in consideration of the load-bearing capacity and ease of use, the stairs are set to be slightly longer than the diagonal length of the corridor, so that the stairs cannot directly cross the top pedal 11, and can abut against the bottom surface of the top pedal 11 when pulled up, thereby forming a convenient hole effect.

[0060] The strip-shaped lock hole setting can distribute the shear force caused by the deadweight and the load, so that the lock plate 34 has a greater bearing capacity, and at the same time, the bearing capacity of the lock plate 34 frame 13 is correspondingly increased, and the possibility of damage to the lock hole part of the lock plate 34 frame 13 is reduced.

[0061] like Figure 1 As shown, the stair segment group 2 includes four stair segment main beams 21 parallel to each other and a plurality of rotating pedals 22 arranged along the axial direction of the stair segment main beams 21, each rotating pedal 22 is rotatably connected to each stair segment main beam 21 to form a stair segment group 2 that can be laid flat to form a flat plate and inclined to form a step ladder; a secondary pedal 23 is arranged at the hinged end of the stair segment main beam 21.

[0062] A parallelogram-shaped staircase can be formed by the parallel stair main beams 21, and the structural setting of the frame and the rotating pedal 22 can make the opening angle of each step the same, while increasing safety and preventing falls caused by missing steps or misaligned stepping positions.

[0063] The rotating pedal 22 includes a flat plate portion and a connecting portion perpendicular to the flat plate portion. The connecting portion is disposed on the bottom surface of the flat plate portion and is located on a side close to the top tray.

[0064] Through the arrangement of the flat plate portion and the connecting portion, the formation of the stair main beam 21 can be effectively coordinated, and each rotating pedal 22 is formed at the same angle, the same slope, and the same direction, and a small gap flat plate can be synchronously formed when folded, thereby preventing the occurrence of empty steps in the flat state.

[0065] The length of the connecting portion, the thickness of the flat plate portion, and the diameter of the stair section main beam 21 are of the same size.

[0066] By setting the same size, a good flat plate effect can be achieved after being laid flat, which prevents unevenness caused by rotating the pedal 22 at a certain angle in the flat state. If unevenness or jagged conditions occur in the flat state, it is easy to cause workers to fall.

[0067] like Figure 1 As shown, a bottom pedal 15 is provided on the bottom tray, and an elevated portion is provided on the top surface of the bottom tray. The bottom pedal 15 is provided on the elevated portion, and the height of the elevated portion is equal to the height of the diameters of the two ladder main beams 21.

[0068] By setting the heightening part, the bottom tray can be effectively raised to the height of a stair section main beam 21 to achieve a heightening effect. After the heightening, the diameter of the stair section main beam 21 can be redundant so that the flat plate state after being flattened is more in line with the plane effect of this level, preventing the rotating pedal 22 from protruding.

[0069] Guide plates 37 are provided on both sides of the secondary pedal 23, wherein two spaced guide plates 37 are provided on the right side of the secondary pedal 23, a rotating guide rod 35 is provided between the two guide plates 37, two fixed plates 36 are provided at positions corresponding to the rotating guide rod 35 on the top surface of the secondary pedal 23, the rotating guide rod 35 is rotatably mounted on the two fixed plates 36, a movable pull rod 31 is hinged at the end of the rotating guide rod 35 close to the hinged end of the stair section group 2, and the movable pull rod 31 is connected to the rotating guide rod 35 by a hinge 33 that can rotate universally.

[0070] A handle 32 of an annular structure is provided at the end of the movable pull rod 31 close to the hinged end of the stair step group 2. In the flat state, the handle 32 can be clamped on the height-increasing portion.

[0071] In this embodiment, the guide plate 37 at least partially extends in a direction away from the staircase main beam 21 to form a docking portion, and a mounting hole corresponding to the lock hole is provided on the docking portion. Figure 2 As shown, a locking plate 34 is provided in the mounting hole, and two locking plates 34 are spaced apart between two adjacent guide plates 37, wherein the locking plate 34 is divided into a long locking plate 34 located at the bottom of the docking portion, used to control the left side of the staircase in this embodiment, and a short locking plate 34 located at the top of the docking portion, used to control the right side of the staircase in this embodiment.

[0072] Among them, a rotating guide rod 35 is at least partially inserted between the long lock plate 34 and the short lock plate 34, and an external tooth is provided on the rotating guide rod 35 at a position between the two lock plates 34. A rack is provided on the side of the long lock plate 34 and the short lock plate 34 close to the contact of the rotating guide rod 35 and is dynamically connected to the external tooth on the rotating guide rod 35. By rotating the rotating guide rod 35, the long lock plate 34 and the short lock plate 34 are translated to achieve unlocking or fixing.

[0073] The guide plate 37 provided on the secondary pedal 23 can provide load-bearing capacity when locked with the top pedal 11. The arrangement of multiple guide plates 37 is to enable the locking plate 34 to remain parallel to the secondary pedal 23 in the unlocked state, thereby preventing interference with the next use. Maintaining the parallel state at all times can quickly meet the next locking use.

[0074] In the present embodiment, in order to prevent accidents, a tenon 38 is provided on the stair main beam 21 at a position corresponding to the handle 32, and a slot 321 is provided on the handle 32 at a position corresponding to the tenon 38. During use, when the staircase has risen to form a climbing state, the slot 321 on the handle 32 is positioned corresponding to the tenon 38 to connect the handle 32 to the tenon 38, which can effectively prevent rotation, thereby maintaining the locked state for a long time and will not be unlocked due to slight shaking of the stair main beam 21.

[0075] In summary, the present invention has the following beneficial effects:

[0076] 1. During the operation of the fertilizer trough, the stairs can form climbing and descending steps. Through the coordination of operations, the simplest mechanical structure can be made of cheap materials to achieve the effect of multiple use, disassembly and easy maintenance.

[0077] 2. The flat plate setting can realize the horizontal transportation operation of the current layer without delaying the corridor of the current layer. Among them, because the narrow fertilizer trough cannot enter the large-scale machinery to work together, the mechanical, variable and detachable stairs can maximize the advantages of this staircase.

[0078] 3. Usually, a narrow trough can only accommodate one person after the scaffolding is built. By providing a gap with two states of use, the effect of maximizing the use of space can be achieved.

[0079] 4. When this staircase is combined with a scaffold to form a working platform, it can achieve continuous transportation with unlimited number of trips and more flexible object sizes under the same time and working conditions.

[0080] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0081] In addition, the above specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the present invention description and its drawings are illustrative and do not constitute a limitation of the claims. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. A suspension bridge type folding transport staircase suitable for narrow fat trough external wall scaffolding, characterized in that: include: A pallet group (1) comprises a top pallet arranged on the N+1 layer and a bottom pallet arranged on the N layer, the top pallet being detachably connected to a scaffold at both sides, locking plates (34) frames (13) being symmetrically arranged on both sides of the top pallet, and the bottom pallet being detachably connected to the scaffold at both sides; A staircase set (2), one end of which is hinged on the bottom tray and the other end of which is detachably arranged on the top tray, the staircase set (2) comprising a locking end located away from the bottom tray and a hinged end located on the bottom tray, the locking end being capable of being fixed on the top tray; A locking group (3) is arranged at the locking end and can be fixedly connected to the top tray, the locking group (3) comprises guide plates (37) arranged on both sides of the locking end of the ladder section group (2), a locking plate (34) is arranged on the guide plate (37), a rotating guide rod (35) capable of causing the locking plate (34) to move laterally is arranged on the locking plate (34), the rotating guide rod (35) is rotatably arranged on the hinged end, a movable pull rod (31) is hingedly arranged at one end of the rotating guide rod (35) away from the locking plate (34), and a handle (32) is arranged at one end of the movable pull rod (31) away from the locking plate (34); The tray group (1), the staircase group (2) and the locking group (3) are capable of forming a staircase state and a flat plate state; In the staircase state, the staircase group (2) forms an angle with the Nth floor, and the locking group (3) is connected to the locking plate (34) frame (13) of the top tray arranged on the N+1th floor through the locking group (3) to form an ascending staircase or a descending staircase; In a flat plate state, one end of the stair set (2) away from the bottom tray is overlapped on an N-layer scaffolding away from the bottom tray to form a horizontal corridor with the N-layer scaffolding.

2. The suspension bridge type folding transport staircase suitable for narrow and fat trough external wall scaffolding according to claim 1 is characterized by: The locking plate (34) frame (13) is a plate-shaped structure, and a strip-shaped locking hole is provided on the bottom surface of the locking plate (34) frame (13) close to the top pedal (11).

3. The suspension bridge type folding transport staircase suitable for narrow and wide trough external wall scaffolding according to claim 1 is characterized by: The staircase group (2) comprises four staircase main beams (21) parallel to each other and a plurality of rotating pedals (22) arranged along the axial direction of the staircase main beams (21), each of the rotating pedals (22) being rotatably connected to each of the staircase main beams (21) to form a staircase group (2) that can be laid flat to form a flat plate or tilted to form a step ladder; A secondary pedal (23) is provided at the hinged end of the stair section main beam (21).

4. The suspension bridge type folding transport staircase suitable for narrow and wide trough external wall scaffolding according to claim 3 is characterized by: The rotating pedal (22) comprises a flat plate portion and a connecting portion perpendicular to the flat plate portion, wherein the connecting portion is arranged on the bottom surface of the flat plate portion and is located on a side close to the top tray.

5. The suspension bridge type folding transport staircase suitable for narrow and wide trough external wall scaffolding according to claim 4 is characterized in that: The length of the connecting portion, the thickness of the flat plate portion and the diameter of the staircase main beam (21) are of the same size.

6. The suspension bridge type folding transport staircase suitable for narrow and wide trough external wall scaffolding according to claim 5 is characterized in that: A bottom pedal (15) is arranged on the bottom tray, a raised portion is arranged on the top surface of the bottom tray, the bottom pedal (15) is arranged on the raised portion, and the height of the raised portion is equal to the height of the diameters of two staircase main beams (21).

7. The suspension bridge type folding transport staircase suitable for narrow and wide trough external wall scaffolding according to claim 6 is characterized by: Guide plates (37) are provided on both sides of the secondary pedal (23), wherein two guide plates (37) are provided at intervals on the right side of the secondary pedal (23), the rotating guide rod (35) is provided between the two guide plates (37), and two fixed plates (36) are provided at positions corresponding to the rotating guide rod (35) on the top surface of the secondary pedal (23), and the rotating guide rod (35) is rotatably mounted on the two fixed plates (36), and a movable pull rod (31) is hingedly provided at the end of the rotating guide rod (35) close to the hinged end of the ladder section group (2), and a handle (32) of an annular structure is provided at the end of the movable pull rod (31) close to the hinged end of the ladder section group (2), and when in a flat state, the handle (32) can be clamped on the height-increasing portion.

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