A modular steel structure staircase for retrofitting elevators in old buildings

Abstract

This invention discloses a modular steel structure staircase for elevator installation in old buildings, belonging to the technical field of supporting facilities for elevator installation in old buildings. To address the significant construction drawbacks of traditional steel structure staircases in existing curved sliding door elevator renovation projects, and the limitations of conventional prefabricated staircases due to space constraints, which prevent their installation and compatibility with new elevators allowing level access to apartments, this invention adopts a modular prefabricated structure design. The staircase mainly consists of five prefabricated modules: stair flights, landing platforms, landing doors, stair flight railings, and landing door railings. All components are prefabricated and rust-proofed, requiring only bolt assembly on-site, eliminating the need for on-site welding, painting, and large hoisting equipment. Components can be manually handled during construction. Each module uses a threaded connection structure adapted to narrow wall spaces. Differentiated steps, load-bearing plates, and specialized connectors adapt to different floors, walls, and elevator structures, enabling level access and barrier-free passage for elevators in old buildings. This invention features a simple structure, convenient assembly, short construction period, no pollution, and low renovation cost. It effectively solves the problem that traditional steel structure staircases cannot adapt to the renovation conditions of new elevator installations. It has strong adaptability and is suitable for the renovation of staircases for the installation of elevators in old buildings with curved sliding door systems.

Description

[0001] This invention relates to the technical field of supporting facilities for adding elevators to old buildings, specifically to a modular steel structure staircase for adding elevators to old buildings. Background Technology

[0002] In order to enable more people to install elevators and achieve barrier-free access in the process of adding elevators to old buildings in urban renewal, the inventors of this case have invented "Curved Sliding Door Elevator for Old Buildings (Patent No. 202521380994.4)" and "New Level Entrance Device for Curved Sliding Door Elevator for Old Buildings (Patent No. 202521381032.0)". The shaft width of the curved sliding door elevator for old buildings is only 1.26 meters, and it can be directly connected to the old building without the need for a connecting corridor. The landing door is installed by chiseling a doorway in the wall above the unit door. The entrance door and the landing platform of the entrance door remain unchanged. The railings, handrails, landing platform and stair sections of the old building's concrete "folded staircase" are all cut off and replaced with the railings, handrails, landing door passage and stair sections of the steel structure "straight staircase". In this way, a level entrance method and barrier-free access are achieved. The application of these two patented products requires steel structure staircases. However, traditional steel structure staircases have two manufacturing methods: on-site welding, which causes significant environmental pollution, has a long construction period, and is costly; and modular on-site assembly, which causes less pollution, has a shorter construction period, and is less costly. However, modular on-site assembled staircases use C-shaped steel beams and steps connected to the treads with bolts through holes. Because one side of the staircase and landing passageway beams is close to the stairwell wall, space constraints prevent the beams and steps from being connected with bolts through holes. Therefore, steel structure staircases produced using these two methods cannot meet the application requirements of the two patented technologies. This case demonstrates the need for a modular steel structure staircase for adding elevators to old buildings. Summary of the Invention

[0003] To address the problems existing in the background technology, the present invention provides a modular steel structure staircase for adding elevators to old buildings. All components of the staircase are prefabricated in the factory and connected on site by bolts. No welding, painting or hoisting equipment is required on the construction site, making construction quick, convenient and efficient. Moreover, each component can be easily carried upstairs by hand.

[0004] The technical solution of this invention is as follows: This invention is a modular steel structure staircase for adding elevators to old buildings. Its special feature is that the modular steel structure staircase for adding elevators to old buildings consists of five modules: stair flight, landing platform, landing door passage, stair flight railing, and landing door passage railing. All modules are prefabricated components in the factory and assembled into a complete staircase on site by bolting.

[0005] Furthermore, the staircase consists of two beams, several steps, and ground fixing components. The beams are made of rectangular tubes with a certain degree of rust resistance. The large (vertical) surface of the rectangular tube has threaded holes corresponding to the positions of the stair steps for installation. The top surface of the small (horizontal) surface of the rectangular tube has threaded holes corresponding to the positions of the staircase railing posts for installation. The threaded holes in the two beams are symmetrical. The steps are classified into four types based on their connection positions: single steps, lowest step on the first floor, non-lowest step on the first floor, and highest step. Each step is made of a metal plate with a certain degree of rust resistance bent into a Z-shape. At both ends of the step, it is folded inward into a U-shape and machined with holes corresponding to the beams for bolt connection. The lowest step on the first floor is similar to a single step, except that the vertical surface of the step has holes for connection to the ground fixing components. The non-lowest step on the first floor is similar to a single step. The steps are similar, but the difference is that the vertical surface of the step extends downwards to a U-shaped surface that matches the height of the rectangular tube of the stair beam. The U-shaped surface has holes for connecting the staircase to the floor platform beams on non-first-floor levels. Holes are also provided on both sides of the U-shaped surface for connecting to the bottom of the stair beams. The highest step is similar to the steps, but the rear end of the step surface extends upwards to a U-shaped surface that matches the height of the rectangular tube of the stair beam. The U-shaped surface has holes for connecting the staircase to the landing frame. Holes are also provided on both sides of the U-shaped surface for connecting to the top of the stair beams. The ground fixing component is an L-shaped metal structure with holes on both sides of the L. One side is fixed to the ground with bolts, and the other side is bolted to the U-shaped surface of the lowest step on the first floor. Two stair beams and several stair steps are bolted together to form a staircase section.

[0006] Furthermore, the treadmill consists of a treadmill frame, a treadmill support plate, and triangular steps. The treadmill frame is made of rectangular tubing with a certain degree of rust resistance, welded into a square frame. Holes are machined on the front and back facades of the square frame. The holes on the outer facade are smaller and are secured with through bolts, while the holes on the inner facade are larger and are secured with through nuts and socket wrenches. The holes on the front facade are used to connect to the wall with bolts, and the holes on the rear facade are used to connect to the highest step of the stair flight with bolts. The treadmill support plate is made of a metal plate with a certain degree of rust resistance, bent downwards on all four sides to form a box shape. The treadmill support plate is installed inside the treadmill frame and remains flat. The triangular steps are made of a metal plate with a certain degree of rust resistance, bent into triangular shapes.

[0007] Furthermore, the landing passageway consists of two crossbeams and landing passageway load-bearing plates. The crossbeams are made of rectangular tubes with a certain degree of rust resistance. The large (vertical) side of the rectangular tube has threaded holes corresponding to the landing passageway load-bearing plate for installation. The top surface of the small side of the rectangular tube has threaded holes corresponding to the landing passageway railing posts for installation. The threaded holes on the two crossbeams are symmetrical. The landing passageway load-bearing plates are divided into two types based on their connection positions: the landing passageway load-bearing plate and the end landing passageway load-bearing plates. The landing passageway load-bearing plates are made of metal plates with a certain degree of rust resistance, bent downwards on all four sides. A rectangular box has holes on its two symmetrical vertical surfaces along its short sides for bolting to the crossbeams. Similar load-bearing plates for the landing door passages are installed at both ends of the passageway. The difference is that one vertical surface along the long side of the rectangular box extends downwards to match the height of the large (vertical) surface of the rectangular crossbeam and has holes for bolting to the wall and floor platform respectively. The two crossbeams and several load-bearing plates are bolted together to form a landing door passage. Its main function is to allow elevator installations in older buildings to directly access the floor platform and enter the apartment, achieving barrier-free access.

[0008] Furthermore, the stair railings and landing door passage railings are made of welded stainless steel round tubes. Each post has a fixed plate with holes welded to its bottom end, which is connected to the stair railings and landing door passages by bolts. The stair railings and landing door passage railings have basically the same structure, the difference being that the fixed plate at the bottom end of the stair railing post has the same angle as the stair beam. Attached Figure Description

[0009] Figure 1 This is a right 45° view of a modular steel structure staircase for adding elevators to old buildings according to the present invention;

[0010] Figure 2 This is a left 45° view of the step of the present invention;

[0011] Figure 3 This is a left 45° view of the lowest step of the first layer of the present invention;

[0012] Figure 4 This is a left 45° view of the non-lowest step of the present invention;

[0013] Figure 5 This is a left 45° view of the highest step of the present invention;

[0014] Figure 6 This is a right 45° view of the stepping platform support plate of the present invention;

[0015] Figure 7 This is a right 45° view of the load-bearing plate of the floor door passage of the present invention;

[0016] Figure 8 This is a 45° right view of the load-bearing plates at both ends of the floor door passage of the present invention.

[0017] The following are explanations of the reference numerals in the attached drawings: 01, Staircase flight; 01-1, Stair beam; 01-2, Step; 01-3, Lowest step on the first floor; 01-4, Step not on the first floor; 01-5, Highest step; 01-6, Ground fixing component; 02, Landing platform; 02-1, Landing platform frame; 02-2, Landing platform load-bearing plate; 02-3, Triangular step; 03, Landing door passage; 03-1, Landing door passage crossbeam; 03-2, Landing door passage load-bearing plate; 03-3, Load-bearing plates at both ends of the landing door passage. Detailed Implementation

[0018] The overall solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] See Figures 1 to 8 The present invention is a modular steel structure staircase for adding elevators to old buildings. Its special feature is that the modular steel structure staircase for adding elevators to old buildings consists of five modules: stair flight (01), landing platform (02), landing door passage (03), stair flight railing (04), and landing door passage railing (05). All modules are prefabricated components in the factory and assembled into a complete staircase on site by bolting.

[0020] Furthermore, the stair flight (01) consists of two stair beams (01-1) and several steps and ground fixing parts (01-5). The stair beams (01-1) are made of rectangular tubes with a certain anti-rust surface. The large surface (vertical surface) of the rectangular tube is machined with threaded holes corresponding to the position of the stair steps for installing the steps (01-2). The top surface of the small surface of the rectangular tube is machined with threaded holes corresponding to the position of the post of the stair flight railing (04) for installing the stair flight railing (04). The threaded holes of the two stair beams (01-1) are symmetrical. The steps are divided into steps (01-5) according to the different connection positions. -2) There are four types of steps: the lowest step on the first floor (01-3), the non-lowest step on the first floor (01-4), and the highest step (01-5). Step (01-2) is made of a metal plate with a certain rust-proof surface bent into a Z shape. At both ends of the step, it is folded inward into a U shape and drilled with holes corresponding to the ladder beam (01-1) for bolts to connect the step and the ladder beam (01-1). The lowest step on the first floor (01-3) is similar to step (01-2), except that step (01-2) has holes on the vertical surface of the step height for fixing to the ground component (01-5). The lowest step (01-4) on the non-first floor is similar to step (01-2), except that the vertical surface of step (01-2) extends downwards to a U-shaped surface with the same height as the rectangular tube (vertical surface) of the stair beam (01-1). The U-shaped surface has holes for connecting the staircase to the floor platform beam on the non-first floor. Holes are also provided on both sides of the U-shaped surface for connecting to the bottom of the stair beam (01-). The highest step (01-5) is similar to step (01-2), except that the rear end of the step surface of step (01-2) extends upwards to a height equal to the vertical surface of the stair beam (01-1). 01-1) The U-shaped facade with the same height of the rectangular tube (vertical facade) has holes for connecting the stairs to the landing frame (02-1). Holes are also provided on both sides of the U-shaped facade for connecting to the top of the stair beams. The ground fixing component (01-5) is a metal component with an L-shaped cross section. There are holes on both sides of the L-shape. One side is fixed to the surface with bolts, and the other side is connected to the lowest step (01-3) of the first floor U-shaped facade with bolts. Two stair beams (01-1) and several stair steps are connected by bolts to form a stair section (01).

[0021] Furthermore, the landing platform (02) is composed of a landing platform frame (02-1), a landing platform load-bearing plate (02-2), and triangular steps (02-3). The landing platform frame (02-1) is made of rectangular tubes with a certain rust-proof surface and welded into a square frame. Holes are processed on the front and rear facades of the square frame. The holes on the outer facade are smaller and are used with through bolts, while the holes on the inner facade are larger and are used with through nuts and socket wrenches. The holes on the front facade are connected to the wall with bolts, and the holes on the rear facade are connected to the highest step (01-5) of the stair flight (01) with bolts. The landing platform load-bearing plate (02-2) is a metal plate with a certain rust-proof surface bent downwards on all four sides into a box shape. The landing platform load-bearing plate (02-2) is installed inside the landing platform frame (02-1) and keeps the plane. The triangular steps (02-3) are metal plates with a certain rust-proof surface bent into triangular steps.

[0022] Furthermore, the landing passage (03) is composed of two crossbeams (03-1) and a landing passage load-bearing plate (03-2). The crossbeams (03-1) are made of rectangular tubes with a certain rust-proof surface. The large surface (vertical surface) of the rectangular tube is machined with threaded holes corresponding to the position of the landing passage load-bearing plate (03-2) for installing the landing passage load-bearing plate (03-2). The top surface of the small surface of the rectangular tube is machined with threaded holes corresponding to the position of the column of the landing passage railing (05) for installing the landing passage railing (05). The threaded holes of the two crossbeams (03-1) are symmetrical. The landing passage load-bearing plate (03-2) is divided into a landing passage load-bearing plate (03-2) and two end landing passage load-bearing plates (03-3) according to the different connection positions. The landing passage load-bearing plate (03-2) is composed of a... The metal plate with a fixed anti-rust surface is bent downwards on all four sides to form a rectangular box. There are holes on the two vertical surfaces of the short side of the rectangular box, which are used to connect to the crossbeam (03-1) by bolts. The load-bearing plates (03-3) of the landing door passages at both ends are similar to the load-bearing plates (03-2) of the landing door passages and are installed at both ends of the landing door passage (03). The difference is that one vertical surface of the long side of the rectangular box extends downwards to the same height as the large surface (vertical surface) of the rectangular tube of the crossbeam (03-1) and has holes for connecting to the wall and the floor platform by bolts respectively. The two crossbeams (03-1) and several load-bearing plates (03-2) of the landing door passages are connected by bolts to form a landing door passage (03). The main function is that the landing door of the old building with the elevator can reach the floor platform horizontally and enter the house directly, realizing barrier-free access.

[0023] Furthermore, the stair railing (04) and the landing door passage railing (05) are made of stainless steel round tubes welded together. Each column has a fixed plate with holes welded to the bottom end, which is connected to the stair railing (01) and the landing door passage by bolts. The stair railing (04) and the landing door passage railing (05) have basically the same structure. The difference is that the fixed plate at the bottom end of the column of the stair railing (04) has the same angle as the stair beam (01-1).

Claims

1. A modular steel structure staircase for retrofitting elevators in old buildings, characterized in that... The modular steel structure staircase for adding elevators to old buildings consists of five modules: stair flight, landing platform, landing doorway, stair flight railing, and landing doorway railing. All modules are prefabricated components in the factory and assembled on site using bolts to form a complete staircase.

2. A modular steel structure staircase for retrofitting elevators in old buildings according to claim 1, characterized in that... A staircase consists of two beams, several steps, and ground fixtures. The beams are made of rectangular tubing with a rust-resistant surface. The large (vertical) side of the rectangular tubing has threaded holes corresponding to the positions of the steps for installation. The top surface of the small side of the rectangular tubing has threaded holes corresponding to the positions of the staircase railing posts for installation. The threaded holes in the two beams are symmetrical. Steps are categorized into four types based on their connection position: single-step, lowest step on the first floor, non-lowest step on the first floor, and highest step. Steps are made of rust-resistant metal plates bent into a Z-shape, with U-shaped inward bends at both ends, and holes corresponding to those in the beams for bolt connection. The lowest step on the first floor is similar to a single-step, except that it has holes on its vertical surface at the step height for connection to the ground fixtures. Non-lowest steps on the first floor are similar to single-steps. Similar to the previous steps, the difference is that the upper surface of the steps extends downwards to form a U-shaped facade with the same height as the large surface (vertical surface) of the rectangular tube of the stair beam. The U-shaped facade has holes for connecting the staircase to the floor platform beams on non-first-floor levels. Holes are also provided on both sides of the U-shaped facade for connecting to the bottom of the stair beams. The highest step is similar to the previous steps, but the rear end of the step surface extends upwards to form a U-shaped facade with the same height as the large surface (vertical surface) of the rectangular tube of the stair beam. The U-shaped facade has holes for connecting the staircase to the landing frame. Holes are also provided on both sides of the U-shaped facade for connecting to the top of the stair beams. The ground fixing component is an L-shaped metal structure with holes on both sides of the L. One side is fixed to the ground with bolts, and the other side is bolted to the U-shaped facade of the lowest step on the first floor. Two stair beams and several stair steps are bolted together to form a staircase section.

3. A modular steel structure staircase for retrofitting elevators in old buildings according to claim 1, characterized in that... The landing platform consists of a landing platform frame, a landing platform support plate, and triangular steps. The landing platform frame is made of rectangular tubes with a certain rust-proof surface, welded into a square frame. Holes are machined on the front and back facades of the square frame. The holes on the outer facade are smaller and are secured with through bolts, while the holes on the inner facade are larger and are secured with through nuts and socket wrenches. The holes on the front facade are used to connect to the wall with bolts, and the holes on the rear facade are used to connect to the highest step of the stair flight with bolts. The landing platform support plate is made of metal plate with a certain rust-proof surface, bent downwards on all four sides to form a box shape. The landing platform support plate is installed inside the landing platform frame and kept flat. The triangular steps are made of metal plate with a certain rust-proof surface, bent into triangular shapes.

4. A modular steel structure staircase for retrofitting elevators in old buildings according to claim 1, characterized in that... The landing passageway consists of two crossbeams and landing passageway load-bearing plates. The crossbeams are made of rectangular tubes with a certain degree of rust resistance. The large (vertical) side of the rectangular tube has threaded holes corresponding to the positions of the landing passageway load-bearing plates for installation. The top surface of the small side of the rectangular tube has threaded holes corresponding to the positions of the landing passageway railing posts for installation. The threaded holes on the two crossbeams are symmetrical. The landing passageway load-bearing plates are divided into two types based on their connection positions: the landing passageway load-bearing plate and the end landing passageway load-bearing plates. The landing passageway load-bearing plates are made of metal plates with a certain degree of rust resistance, bent downwards on all four sides to form a single layer. The rectangular box has holes on its two symmetrical vertical surfaces along its short sides for bolting to the crossbeams. The load-bearing plates for the landing door passages at both ends are similar to those for the landing door passages, but with a difference: one vertical surface along the long side of the rectangular box extends downwards to match the height of the large surface (vertical surface) of the rectangular crossbeam and has holes for bolting to the wall and floor platform respectively. The two crossbeams and several load-bearing plates for the landing door passages are bolted together to form a landing door passage. Its main function is to allow elevators in old buildings to be installed with horizontal access to the floor platform, enabling direct entry into the apartment and barrier-free access.

5. A modular steel structure staircase for adding elevators to old buildings according to claim 1, characterized in that... The stair railings and landing door railings are made of welded stainless steel round tubes. Each post has a fixed plate with holes welded to its bottom end, which is connected to the stair railings and landing door railings by bolts. The stair railings and landing door railings have basically the same structure, the difference being that the fixed plate at the bottom end of the stair railing post has the same angle as the stair beam.

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