Scaffold for stairs in subway platform

Abstract

The utility model relates to a stair scaffold, specifically relates to a stair scaffold in subway platform, including the front, back frame unit with height difference and erecting in the load -bearing platform between two frame units, still be equipped with the inclined pull rod between two frame units, the frame unit includes the pole and the multilayer horizontal rod of setting between two poles according to the fixed step, and the inclined pull rod is connected with the horizontal rod of front, back frame unit through the fastener, compared with the prior art, the beneficial effects of the utility model are: unlike the fixed structure of the overall frame of the traditional scaffold, the utility model adopts the modularization design, and all the rest structural members can be detached except the frame unit, so that the overall scaffold can be transported as the flat frame, and the transportation convenience is greatly improved.

Description

Technical Field

[0001] This utility model relates to scaffolding for staircases, specifically to a scaffolding for staircases inside a subway platform. Background Technology

[0002] Staircase scaffolding is a temporary work platform designed and erected to adapt to the special spatial structure of stairwells. Its core objective is to provide a working surface for construction workers safely and efficiently. Therefore, the two most important factors to consider in the structural design of staircase scaffolding are how to erect it efficiently and how to ensure the safety of the structure.

[0003] Traditional scaffolding is designed to create working platforms on open, flat surfaces. However, stair scaffolding needs to adapt to the unique terrain of sloping, narrow, and discontinuous staircases. Therefore, stair scaffolding requires a different high-low frame structure than traditional scaffolding to maintain overall balance. Scaffolding erected on staircases within subway platforms faces more stringent safety and restricted environments compared to ordinary stairwells, requiring more complex transportation conditions. This is because the pipeline and electrical wiring within subway platforms is far more complex than the pipeline structure in ordinary building stairwells. Simultaneously, ensuring smooth and safe pedestrian flow is crucial. The transportation of scaffolding within subway platforms is also strictly limited, prohibiting the use of hoisting equipment and other transport machinery; it can only be moved manually or by small hydraulic trucks. This necessitates that the design of stair scaffolding for subway platforms meet the special requirements of transportation and erection sites, achieving the highest safety and stability standards. Therefore, developing a new type of stair scaffolding for subway platforms not only has urgent research value but also significant economic benefits and industrial application potential. This is the driving force and foundation for the completion of this utility model. Utility Model Content

[0004] In order to overcome the defects of the prior art as mentioned above, the inventors of this utility model have conducted in-depth research and, after a great deal of creative work, have completed this utility model.

[0005] Specifically, the technical problem to be solved by this utility model is to provide a solution to the technical problem.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A scaffold for staircases inside a subway platform includes front and rear frame units with a height difference and a load-bearing platform erected between the two frame units. A diagonal brace is also provided between the two frame units. Each frame unit includes uprights and multiple layers of horizontal bars set between the two uprights at predetermined step distances. The diagonal brace is connected to the horizontal bars of the front and rear frame units by fasteners. The diagonal brace includes transverse bars and diagonal braces. The inclination angle of the transverse bars is between 0 and 5 degrees, and the inclination angle of the diagonal braces is set to 45 to 60 degrees. The frame unit has an electrically adjustable base at the bottom, with a fixed suction cup at the bottom; the base is adjusted by an intelligent control system.

[0007] In this utility model, as an improvement, the fastener is a clamp-type structure, the inner contour of which matches the horizontal bar, including two semi-circular arc-shaped clamps, one end of which is hinged and the other end is provided with matching bolt locking holes. The inner contour of the clamps is embedded with magnetic strips to assist in positioning. The fastener has wedge-shaped elastic teeth extending from the inner contour surface, and the elastic teeth are made of spring steel.

[0008] In this utility model, as an improvement, the load-bearing platform has reinforcing supports on both sides. The reinforcing supports and the platform are both anchored to the same horizontal bar in the frame unit by fasteners, so that the reinforcing supports and the load-bearing platform have the same tilt angle and direction. An angle sensor is installed on the reinforcing support near the hinge point on one side.

[0009] In this utility model, as an improvement, the reinforcing brace and the diagonal tie rod are all hollow, multi-chamber steel pipes. The steel pipes have internal partitions that divide the inner cavity into at least two chambers along the axial direction. The steel pipes have thickened pipe walls at the joints where the fasteners are connected.

[0010] In this utility model, as an improvement, the intelligent control system includes: The main controller includes a data communication module and a processing unit. It receives data information sent by the data acquisition unit, processes the data, and issues signal commands. The data acquisition unit includes a tilt sensor and an intelligent drive module. The intelligent drive module drives the base to rise and fall, records the rising and falling height, transmits the data information to the main controller, and receives signal commands from the main controller. The human-machine interface is a mobile terminal with an operation panel, used to display the current status of the scaffolding, set parameters, and control leveling. The protection module is located at the top and bottom of the base's lifting stroke, and works in conjunction with the lifting limit set by the intelligent drive module to provide safety protection; The power supply and distribution module, including circuit protection, provides a stable and safe power supply for the entire system and the electrically adjustable base.

[0011] In this utility model, as an improvement, the protection module is divided into a top stroke safety unit and a bottom stroke safety unit. The bottom stroke safety unit includes an upper gear ring disposed at the bottom of the lifting inner column and a lower gear ring fitted and installed at the bottom of the inner column's stroke cavity. The top safety unit includes a limiting spring block set in a groove in the inner wall of the outer cylinder and a positioning groove that is matched with the outer contour of the inner column.

[0012] In this invention, as an improvement, the tilt sensor is fixed in the mounting base by a rubber gasket and connected to the reinforcing support via the mounting base.

[0013] In this utility model, as an improvement, the limiting spring block is set within the safety margin at the top of the inner column's stroke, and the positioning groove is correspondingly set at the safety margin stroke position of the inner column.

[0014] In this utility model, as an improvement, the limiting spring block is configured to pop out by a spring mechanism, engage with the positioning groove of the inner column, and be pushed back by the contact surface when the inner column moves down.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) Unlike the fixed structure of the traditional scaffold frame, this utility model adopts a modular design. Except for the frame unit, all other structural components can be disassembled, so that the whole scaffold can be transported as a flat frame, which greatly improves the convenience of transportation.

[0016] (2) While modularly assembling the structure, a balance was made in the overall structural design to ensure the safety and stability of the structure. First, horizontal bars with predetermined step distances were used in the frame units on both sides as climbing channels and anchoring of the tie rods and load-bearing platforms, ensuring that the tie rods could be locked at the optimal force angle according to different working conditions. Second, an intelligent control system was added to achieve intelligent leveling of the top platform by adjusting the height of the base, thereby ensuring that the construction personnel can stand stably.

[0017] (3) In this utility model, the base is adjusted by the intelligent control system and the height of the front and rear frame units is recorded. Based on the height difference of the horizontal bars of the front and rear frame units and the length of the diagonal brace, the anchoring position at both ends of the diagonal brace and the tilt angle of the diagonal brace are determined so that the diagonal brace reaches the optimal force angle. Under the condition that the diagonal brace is detachable, a whole steel pipe structure is adopted and the tilt angle is matched to optimize the force of the diagonal brace and ensure structural safety. (4) This utility model adds a protection module to the intelligent control system to provide protection at the key position of the lifting stroke to avoid over-travel of the lifting stroke. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of the scaffolding of this utility model; Figure 2This is a structural schematic diagram of the load-bearing platform and reinforcing brace of this utility model; Figure 3 This is a schematic diagram of the structure of the fastener of this utility model; Figure 4 This is a schematic diagram of the structure of the base of this utility model; Figure 5 for Figure 4 Enlarged structural diagram of section A; Figure 6 This is a schematic diagram of the tilt sensor of this utility model; Figure 7 This is a block diagram of the control principle of an intelligent control system. In the diagram: 1. Frame unit, 2. Fastener, 3. Load-bearing platform, 4. Reinforcing brace, 5. Upright pole, 6. Horizontal bar, 7. Transverse bar, 8. Diagonal brace, 9. Base, 10. Suction cup, 11. Tilt sensor, 16. Upper gear ring, 17. Lower gear ring, 18. Limiting spring block, 19. Positioning groove, 20. Rubber pad, 21. Mounting base, 201. Hoop, 202. Magnetic strip, 203. Elastic gear. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] like Figure 1 As shown, a type of scaffolding for stairs inside a subway platform is provided. In this scaffolding, a height difference is set between the front and rear frame units 1, and this height difference is a multiple of the designed height of the steps. The scaffolding is placed within the stairs, with the steps compensating for the height difference to ensure the stability of the scaffolding. A load-bearing platform 3 is provided between the two frame units, located at the top of the frame unit, serving as a standing platform. Figure 2 As shown, the load-bearing platform 3 adopts the existing flat platform structure. The load-bearing platform 3 has reinforcing supports 4 on both sides to increase the connection strength between the load-bearing platform 3 and the frame units on both sides. There is also a diagonal tie rod between the two frame units. The diagonal tie rod is located below the load-bearing platform 3 and is a hollow round or square tube. The diagonal tie rod is set with a whole steel tube to ensure the strength of the diagonal tie rod. The load-bearing platform 3, reinforcing supports 4 and diagonal tie rod are all connected to the front and rear frame units through fasteners 2 to realize the modular splicing of the whole structure.

[0022] The modular structure design can adapt to the special transportation requirements within the subway platform. To ensure the safety and stability of the overall structure after assembly, the following structural design is adopted: Between the two uprights 5 of the frame unit, there are multiple horizontal bars 6. The horizontal bars 6 can serve as climbing passages and anchorage positions. The load-bearing platform 3 and the reinforcing brace 4 are anchored to the top horizontal bar 6. The diagonal braces are divided into horizontal bars 7 and diagonal braces 8. The horizontal bars 7 are kept as horizontal as possible after the structure is leveled. When they cannot be kept horizontal, their tilt angle is controlled between 0 and 5 degrees. The tilt angle of the diagonal braces 8 is set to 45-60 degrees. The tilt angle is set based on the intelligent control system after the overall structure is leveled, and the anchorage position is selected after the system calculates the height difference between the horizontal bars of the front and rear frame units.

[0023] The bottom of the frame unit has an electrically adjustable base 9, which is located at the bottom of the four uprights 5. The bottom of the adjustable base 9 is a suction cup 10 for fixing. The suction cup 10 adopts a common suction cup structure to enhance the stability of the connection between the base 9 and the ground. The two bases 9 located on the same side of the frame unit have the same adjustment height to avoid height difference between the horizontal bar 6 and the uprights 5 on both sides. The lifting height of the base 9 is adjusted by an intelligent control system. The base 9 adopts the existing electric lifting seat structure, which can be hydraulic, electric, screw, or other traditional lifting methods. The base 9 is also equipped with a mechanical locking nut. After adjusting to the corresponding height, tighten the nut to lock the base 9.

[0024] The reinforcing brace and diagonal tie rod are all hollow, multi-chamber steel pipes. The steel pipes have internal partitions that divide the inner cavity into at least two chambers along the axial direction. The steel pipes have thickened walls at the joints where the fasteners are connected.

[0025] like Figure 3 As shown, the fastener 2 is a clamp-type structure, including two hinged semi-circular clamps 201. The inner contour of the clamps matches the horizontal bar 6, and the clamps 201 are wrapped around the horizontal bar and locked with bolts. The inner contour wall of the clamps 201 is embedded with a magnetic strip 202 for auxiliary positioning. The fastener 2 has a wedge-shaped elastic tooth 203 extending from the inner contour surface. The elastic tooth 203 is made of spring steel. When the fastener 2 is fastened to the horizontal bar 6, the elastic tooth 203 is squeezed, and combined with the magnetic strip 202 and the contour of the fastener itself, a locking force is generated on the horizontal bar 6. The design of the fastener 2 is based on its application position. First, the load-bearing platform itself is subjected to downward pressure. When the fastener 2 is used for the load-bearing platform 3 and the reinforcing support 4, the load-bearing platform 3 is subjected to downward force.

[0026] The reinforcing brace 4 and the load-bearing platform 3 are anchored on the same horizontal bar 6, so that the reinforcing brace 4 and the load-bearing platform 3 have the same tilt angle and direction. An angle sensor 11 is installed on the reinforcing brace 4 near one side hinge point to measure the tilt angle of the reinforcing brace 4 and the load-bearing platform 3, and leveling is performed by the base 9.

[0027] like Figure 7 As shown, the intelligent control system includes: The main controller is the core of the entire control system. It includes a data communication module and a processing unit. The data communication module is used to receive data and send signal commands. The processing unit analyzes the received data. The data acquisition unit includes an tilt sensor and an intelligent drive module to collect the tilt angle of the reinforcing support 4 and the load-bearing platform 3 as well as the lifting height of the base 9. The intelligent drive module drives the base to lift and lower. The intelligent drive module includes a displacement sensor and a lifting communication module, which records the lifting height and transmits the data information to the main controller, and receives signal commands from the main controller. The human-machine interface is a mobile terminal with an operation panel, used to display the current status of the scaffolding, set parameters, and control leveling. The current status of the scaffolding includes the current tilt angle, the height of each upright, the calculated height of the horizontal bar, the tilt angle of the diagonal bracing and transverse bracing, and warning information. The protection module is located at the top and bottom of the base lifting stroke. It works in conjunction with the lifting limit set by the intelligent drive module to provide safety protection. The protection module is a mechanical structure and is used to address over-limit issues in case of lifting structure failure, ensuring the safety of maintenance personnel. The power supply and distribution module provides stable power to all modules and the regulating base. The distribution module includes circuit breakers, fuses and overload protection to prevent short circuits and overloads in the power supply.

[0028] The protection module is divided into a safety unit at the top of the travel and a safety unit at the bottom of the travel.

[0029] like Figure 4 and 5 As shown, the bottom safety unit of the stroke includes an upper gear ring 16 located at the bottom of the lifting inner column 14 and a lower gear ring 17 installed in conjunction with it at the bottom of the stroke cavity of the inner column 14. The gear ring pads up part of the stroke to prevent the inner column 14 from exceeding the limit when it descends. At the same time, after descending to the limit state, the two gear rings cooperate to prevent the inner column 14 and the upright connected to the inner column 14 from rotating, and maintain stability in the over-limit state.

[0030] The top safety unit includes a limiting spring block 18 disposed in a groove in the inner wall of the outer cylinder 13 and a positioning groove 19 disposed on the outer contour of the inner column 14. The positioning groove 19 is a flat-bottomed conical groove with a limiting flat bottom. The limiting spring block 18 is disposed in the lifting path of the positioning groove 19. When the positioning groove 19 rises to the safety redundancy position of the stroke limit, the limiting spring block 18 extends into the positioning groove 19 under the action of the torsion spring, and achieves positioning and locking through bottom surface contact. When the positioning groove 19 descends, the spring block 18 is pressed back into the groove under the extrusion of the conical inclined surface, disengaging from the positioning groove 19 and releasing the lock. The limiting spring block 18 is placed within the safety margin at the top of the inner column's stroke, that is, it is set before reaching the top of its stroke. The setting position can be adjusted as needed to achieve both leveling requirements and within the limited safety range. The setting position of the positioning groove 19 matches the limiting spring block 18 so that after it reaches the safety limit position, the spring block enters the positioning groove 19.

[0031] like Figure 6 As shown, the tilt sensor 11 is installed in the reinforcing support 4 through a mechanical damping device. The damping device includes a rubber pad 20 and a mounting base 21. The back of the tilt sensor 11 is attached to the rubber pad 20 and fixed in the mounting base 21 through the rubber pad 20. It is connected to the reinforcing support 4 through the mounting base 21 to filter high-frequency vibration noise and ensure the stability of the sensor measurement signal.

[0032] The limiting spring block 18 is configured to be ejected by a torsion spring mechanism, engage with the positioning groove of the inner column, and be pushed back by the contact surface when the inner column moves down. The torsion spring is set at the hinge end of the limiting spring block 18, with one end of the torsion spring fixed to the hinge shaft and the other end connected to the limiting spring block 18. To ensure the rebound of the limiting spring block 18, two torsion springs can be fixed on both sides of the hinge of the limiting spring block 18 respectively to ensure the rebound effect.

[0033] In the data acquisition process of the tilt sensor, the main controller uses a complementary filter to eliminate instantaneous vibration noise.

[0034] The tilt angle settings for the diagonal web member 8 include: The intelligent control system adjusts the load-bearing platform 3 to keep it level, calculates the height of each horizontal bar 6 based on the recorded height of the uprights, and calculates the height difference of the horizontal bars 6 between the front and rear frame units. Based on the height difference of the horizontal bar 6 and the distance between the front and rear frame units, and in conjunction with the length of the diagonal brace 8, calculate the anchorage height that is within the range of the inclination angle of the diagonal brace 8, select the horizontal bar that is within the range of the anchorage height, and display the result on the display interface. After installing the diagonal brace 8, measure the actual tilt angle and compare it with the system calculation results. After verification, lock the fasteners to complete the installation of the diagonal brace 8.

[0035] Example 1: The scaffolding for the stairs of a subway platform has the following features: a step height of 155mm, a tread depth of 300mm, a front frame unit with a horizontal bar distance of 2100mm from the ground to the top, a rear frame unit with a horizontal bar distance of 1325mm from the ground to the top, a load-bearing platform with dimensions of 3000mm x 900mm, a worm gear motor for the lifting base, and a diagonal brace length of 1050mm.

[0036] The leveling process of the electric lifting base: Set the control targets for the load-bearing platform as follows: the platform's horizontal error is <±3mm, and the tilt angle is <0.2°; The front and rear frame units are placed on the corresponding stair treads at intervals of five steps. The load-bearing platform and reinforcing brace are then placed on the top horizontal bar of the front and rear frame units and the fasteners are locked. At this point, the scaffolding is initially installed to the designed height. Read the tilt sensor data, calculate the height difference between the front and rear frame units, and calculate the adjustment amount. Simultaneously raise the two front bases or simultaneously lower the two rear bases, or combine both, to adjust the tilt angle of the load-bearing platform while ensuring the status of the uprights, so that the tilt angle reaches the preset target. Leveling can be done in automatic or manual mode until the platform is level. Then, check the tilt sensor data and lock the base to complete the leveling process.

[0037] Install the diagonal tie rods, and install the transverse rods on the horizontal rods that are at the same height as the front and rear frame units, and tighten the fasteners; The inclination angle of the diagonal web member is calculated as follows: The target tilt angle is 45°-60°. Based on the length of the diagonal bracing, the height difference range satisfying the tilt angle range is: 742.5mm ≤ h ≤909.3mm. Based on the height of each horizontal bar after the scaffold is leveled, select the horizontal bar within the height difference range, anchor the diagonal bracing, and complete the scaffold assembly and leveling.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A scaffolding system for staircases inside a subway platform, comprising front and rear frame units with a height difference and a load-bearing platform erected between the two frame units, wherein diagonal bracing is provided between the two frame units, characterized in that: The frame unit includes uprights and multiple layers of horizontal bars set between two uprights at predetermined step distances. The diagonal bracing is connected to the horizontal bars of the front and rear frame units by fasteners. The diagonal bracing includes transverse bars and diagonal bracing. The inclination angle of the transverse bars is between 0 and 5 degrees, and the inclination angle of the diagonal bracing is set to 45-60 degrees. The frame unit has an electrically adjustable base at the bottom, with a fixed suction cup at the bottom; the base is adjusted by an intelligent control system.

2. The scaffolding for staircases inside subway platforms according to claim 1, characterized in that: The fastener is a clamp-type structure, and its inner contour matches the horizontal bar. It includes two hinged semi-circular clamps. The other end of the clamp is provided with a matching bolt locking hole. The inner contour of the clamp is embedded with a magnetic strip to assist in positioning. The fastener has a wedge-shaped elastic tooth extending from the inner contour surface. The elastic tooth is made of spring steel.

3. The scaffolding for staircases inside subway platforms according to claim 1, characterized in that: The load-bearing platform has reinforcing supports on both sides. The reinforcing supports and the platform are both anchored to the same horizontal bar in the frame unit by fasteners, so that the reinforcing supports and the load-bearing platform have the same tilt angle and direction. An angle sensor is installed on the reinforcing support near the hinge point on one side.

4. The scaffolding for staircases inside subway platforms according to claim 3, characterized in that: The reinforcing brace and diagonal tie rod are all hollow, multi-chamber steel pipes. The steel pipes have internal partitions that divide the inner cavity into at least two chambers along the axial direction. The steel pipes have thickened walls at the joints where the fasteners are connected.

5. The scaffolding for staircases inside subway platforms according to claim 1, characterized in that: The intelligent control system includes: The main controller includes a data communication module and a processing unit. It receives data information sent by the data acquisition unit, processes the data, and issues signal commands. The data acquisition unit includes a tilt sensor and an intelligent drive module. The intelligent drive module is located inside the base. It drives the base motor to adjust the height of the base, records the height, transmits the data to the main controller, and receives signal commands from the main controller. The human-machine interface is a mobile terminal with an operation panel, used to display the current status of the scaffolding, set parameters, and control leveling. The protection module is located at the top and bottom of the base's lifting stroke, and works in conjunction with the lifting limit set by the intelligent drive module to provide safety protection; The power supply and distribution module, including circuit protection, provides a stable and safe power supply for the entire system and the electrically adjustable base.

6. The scaffolding for staircases inside subway platforms according to claim 5, characterized in that: The protection module is divided into a top travel safety unit and a bottom travel safety unit. The bottom travel safety unit includes an upper gear ring disposed at the bottom of the lifting inner column and a lower gear ring fitted and installed at the bottom of the inner column travel cavity. The top safety unit includes a limiting spring block set in a groove in the inner wall of the outer cylinder and a positioning groove that is matched with the outer contour of the inner column.

7. The scaffolding for staircases inside subway platforms according to claim 3, characterized in that: The tilt sensor is fixed inside the mounting base by a rubber gasket and connected to the reinforcing support via the mounting base.

8. The scaffolding for staircases inside subway platforms according to claim 6, characterized in that: The limiting spring block is set within the safety margin at the top of the inner column's stroke, and the positioning groove is correspondingly set at the safety margin stroke position of the inner column.

9. The scaffolding for staircases inside subway platforms according to claim 6, characterized in that: The limiting spring block is designed to pop out by a spring mechanism, engage with the positioning groove of the inner column, and be pushed back by the contact surface when the inner column moves down.

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