A handrail corner connection structure and a stair railing using the structure

Abstract

A handrail corner connection mechanism and a stair railing using the structure are disclosed, relating to the field of handrail technology for stairs or ramps. The handrail corner connection mechanism includes: a horizontally extending main crossbar; a first diagonal support bar disposed on one side of the main crossbar; a second diagonal support bar disposed on the other side of the main crossbar away from the first diagonal support bar; one end of the first and second diagonal support bars is sleeved onto the main crossbar; a vertical guide groove is longitudinally provided along the axis of the main crossbar, forming a continuous channel for a vertical bar to pass through; a vertical locking assembly is provided on the main crossbar, configured to press and fix the vertical bar passing through the vertical guide groove to the inner wall of the vertical guide groove by applying radial external force; the vertical guide groove of this invention provides continuously adjustable installation space for the vertical bar to adapt to on-site construction errors, and the vertical locking assembly forms a strong mechanical interlock through radial pressing friction, achieving rapid disassembly and assembly without damage.

Description

Technical Field

[0001] This utility model relates to the field of handrail technology for stairs or ramps, and in particular to a handrail corner connection structure and a stair railing using the structure. Background Technology

[0002] Staircase handrails, as an important component of building safety facilities, not only ensure the safe passage of users but also significantly enhance spatial comfort and visual appeal through the combination of ergonomic design and decorative craftsmanship. Traditional fixed wooden handrails mostly use prefabricated integral structures, which can guarantee structural strength, but often result in misalignment due to on-site measurement errors during construction, making later adjustments difficult, especially for construction sites that require frequent demolition and modification.

[0003] In the prior art, there are some adjustable handrails to adapt to the above situation. For example, Chinese invention patent No. 201811135697.8 provides a corner component for a wooden staircase handrail with a small step difference, including two mirror-symmetrical connecting parts, each of which has a splicing part, and the two splicing parts are connected by a stud and nut; the splicing part is cylindrical, and at least one end face of the splicing part has a flow groove, the flow groove having at least one drip opening connected to the circumferential surface of the splicing part; the connecting part has an operating chamber for tightening the nut. This structure has the characteristics of being adjustable, having a small step difference, and being aesthetically pleasing.

[0004] While some quick-installation handrail solutions exist in the existing technology, most of them adopt simple snap-on or plug-in structures, which generally suffer from problems such as low node strength and limited adjustment dimensions, and cannot meet the multiple requirements of construction site for structural reliability, reusability and quick disassembly and modification. Utility Model Content

[0005] The present invention aims to solve the technical problems of existing stair handrail corner structures having limited adjustment dimensions, insufficient joint strength, and difficulty in adapting to the needs of rapid dismantling and modification.

[0006] To achieve the above objectives, according to one aspect of the utility model, a handrail corner connection structure is provided, comprising: a horizontally extending main crossbar; a first oblique support rod disposed on one side of the main crossbar; a second oblique support rod disposed on the other side of the main crossbar away from the first oblique support rod; one end of the first oblique support rod and the second oblique support rod being sleeved on the main crossbar; a vertical guide groove is longitudinally provided along the axis of the main crossbar, the vertical guide groove forming a continuous channel adapted for a vertical rod to pass through; a vertical locking assembly is provided on the main crossbar, the vertical locking assembly being configured to press and fix the vertical rod passing through the vertical guide groove to the inner wall of the vertical guide groove by applying a radial external force.

[0007] As a preferred embodiment of the above technical solution, the first and second inclined support rods are each provided with a first sleeve connection part at their proximal ends, and the two first sleeve connection parts are respectively sleeved on both ends of the main crossbar; an angle adjustment and locking assembly is provided on the outside of the first sleeve connection part, and the angle adjustment and locking assembly fixes the main crossbar to the inner wall of the corresponding first sleeve connection part by radial locking force.

[0008] As a preferred embodiment of the above technical solution, the vertical locking assembly includes a first fastening seat disposed on the outer wall of the main crossbar and a first locking bolt assembled in the first fastening seat, the end of the first locking bolt passing through the first fastening seat and disposed in the vertical guide groove; the angle adjusting locking assembly includes a second fastening seat disposed on the outer surface of the first inclined support or the second inclined support and a second locking bolt assembled in the second fastening seat, the second locking bolt passing through the second fastening seat and abutting against the end of the main crossbar.

[0009] As a preferred embodiment of the above technical solution, the first fastening seat and the second fastening seat are internally fitted with an interference fit metal ring, and the metal ring is provided with a threaded hole that mates with the first locking bolt or the second locking bolt.

[0010] As a preferred embodiment of the above technical solution, the first fastening seat is provided with a plurality of reinforcing ribs integrally formed with the surface of the main crossbar in the circumferential direction; the second fastening seat is provided with a plurality of reinforcing ribs integrally formed with the surface of the first inclined support or the second inclined support in the circumferential direction.

[0011] As a preferred embodiment of the above technical solution, both the first and second inclined support rods are integrally bent pipe components, with the bent portion forming an arc transition section.

[0012] A stair railing includes a diagonal safety bar, a vertical reinforcing bar, and a handrail corner connection structure as described in any of the above technical solutions; one end of the diagonal safety bar is connected to the first diagonal support bar or the second diagonal support bar, and the other end is sleeved on the main crossbar; the vertical reinforcing bar is provided through the vertical guide groove of the main crossbar, and the bottom surface of the vertical reinforcing bar abuts against the building's load-bearing surface.

[0013] As a preferred embodiment of the above technical solution, the number of handrail corner connection structures is at least 3 sets, and each set of handrail corner connection structures is arranged in parallel in space, with the vertical reinforcing rod passing through the vertical guide groove of each set of handrail corner connection structures.

[0014] As a preferred embodiment of the above technical solution, the end of the first or second inclined support rod away from the main crossbar is configured as a second connecting part. A guardrail locking assembly is provided on the outside of the second connecting part. The guardrail locking assembly includes a third fastening seat disposed on the outer surface of the first or second inclined support rod and a third locking bolt assembled in the third fastening seat. The third locking bolt passes through the third fastening seat and abuts against the end of the inclined safety rod.

[0015] In summary, this utility model has the following advantages:

[0016] 1. The vertical guide groove of this utility model provides a continuously adjustable installation space for the vertical rod to adapt to on-site construction errors. The vertical locking component forms a firm mechanical interlock through radial pressing friction, realizing quick disassembly and assembly without damage. Combined with the sleeve design of the inclined support rod and the main cross rod, it further supports multi-angle linkage adjustment and fully adapts to the dual requirements of structural reliability and flexibility in complex construction scenarios.

[0017] 2. The sleeve connection between the first and second inclined support rods and the main crossbar can achieve bidirectional stepless angle adjustment through precise clearance fit and coordinated control of the angle adjustment and locking components; after each rod is assembled independently, it is formed by radial pressing of the locking components to form a tight connection, which can not only adapt to the installation requirements of different stair inclination angles, but also ensure the long-term stability of the node after adjustment, and avoid loosening and displacement caused by repeated vibration.

[0018] 3. Multiple sets of parallel handrail corner connection structures form a spatial grid system through a series of single vertical reinforcing rods, achieving synchronous locking of multiple nodes and uniform distribution of support force.

[0019] Further or other beneficial effects will be discussed in the embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the stair railing structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the handrail corner connection structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the main crossbar structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the first inclined support structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the second inclined support structure of this utility model;

[0025] Among them, 1-main crossbar, 2a-first diagonal support bar, 2b-second diagonal support bar, 21-first sleeve connection part, 3-vertical guide groove, 4-vertical locking assembly, 41-first fastening seat, 42-first locking bolt, 5-angle adjustment locking assembly, 51-second fastening seat, 52-second locking bolt, 6-diagonal safety bar, 7-vertical reinforcing bar, 8-guardrail locking assembly, 81-third fastening seat, 82-third locking bolt. Detailed Implementation

[0026] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0027] The present invention will be further explained below with reference to the embodiments: Example

[0028] A handrail corner connection structure, referring to Figure 2 This is used for the connection of each corner of the stair railing, including a first inclined support 2a, a second inclined support 2b, and a horizontally extending main crossbar 1. The first inclined support 2a is set on one side of the main crossbar 1, and the second inclined support 2b is set on the other side of the main crossbar 1 away from the first inclined support 2a. Specifically, one end of the first inclined support 2a and the second inclined support 2b is sleeved on the main crossbar 1. In addition, the first inclined support 2a and the second inclined support 2b are both integrally bent tubes, and the bend forms an arc transition part with a bending angle of 90°. The inner and outer surfaces of the arc transition part are both smooth curved surfaces without sharp edges. A vertical guide groove 3 is longitudinally installed along the axis of the main horizontal bar 1, forming a continuous channel for the vertical bar to pass through. A vertical locking component 4 is installed on the main horizontal bar 1, configured to press and fix the vertical bar passing through the vertical guide groove 3 to the inner wall of the vertical guide groove 3 by applying radial external force. The vertical bar mentioned above is used to pass through the vertical guide groove 3 and contact the floor after the handrail corner connection structure and guardrail are assembled to form a staircase. The construction of the vertical guide groove 3, through a pre-set vertical force transmission mechanism, enables the vertical bar to form a dual fixing effect of axial constraint and radial pressing when passing through the channel. This ensures that the assembled stair railing system achieves precise force transmission between the vertical bar and the floor, thereby constructing a multi-dimensional support system with the vertical guide groove 3 as its core, which also has the functions of structural strength enhancement and dynamic adaptation of construction parameters.

[0029] The first oblique support rod 2a and the second oblique support rod 2b are symmetrically distributed on both sides of the main crossbar 1. Each of the two oblique support rods has a pre-fabricated tubular first sleeve connection part 21 at its proximal end. The two first sleeve connection parts 21 of the two oblique support rods are respectively sleeved on the two end extensions of the main crossbar 1, and an annular positioning gap of 0.2±0.05mm is provided between the inner diameter of the first sleeve connection part 21 and the outer diameter of the main crossbar 1 to facilitate the sleeve connection of the first sleeve connection part 21 onto the main crossbar 1. Specifically, referring to… Figure 4 and Figure 5 Cooperate Figure 2 Each first sleeve connection 21 has an integrated angle adjustment and locking assembly 5 on its outer side. The angle adjustment and locking assembly 5 is installed via a second fastening seat 51 disposed on the outer surface of the first inclined support 2a or the second inclined support 2b. The second locking bolt 52 disposed in the second fastening seat 51 generates a radial locking force during tightening, that is, the end of the second locking bolt 52 forces the main crossbar 1 against the wall of the first sleeve connection 21 to form a fixed position, thereby achieving stable fixation after angle adjustment. In addition, the second fastening seat 51 is integrally formed on the first inclined support 2a or the second inclined support 2b.

[0030] Reference Figure 2 and Figure 3 The vertical locking assembly 4 includes a first fastening seat 41 integrally formed on the outer wall of the main crossbar 1 and a first locking bolt 42 assembled within the first fastening seat 41. Specifically, the first fastening seat 41 has a built-in mounting cavity with a threaded channel, and is equipped with the external thread of the first locking bolt 42 to achieve assembly of the two. During construction, after the vertical bar is inserted into the vertical guide groove 3, the first locking bolt 42 is screwed in so that its end presses against the surface of the vertical bar, thereby forming the first locking bolt 42 forcing the vertical bar against the wall of the main crossbar 1 to form a fixed position.

[0031] In this embodiment, the structure of the first fastening seat 41 and the second fastening seat 51 is specifically optimized. The inner cavity is fitted with a stainless steel metal mating ring 9 by interference fit. The metal mating ring 9 has an internal thread that perfectly matches the external thread of the locking bolt.

[0032] To improve the torque resistance between the locking bolt and the fastening seat and avoid structural damage during locking operations, the following reinforcement scheme is adopted: The first fastening seat 41 has four sheet-like reinforcing ribs distributed at equal angles along the circumference, and their roots are connected to the surface of the main crossbar 1 by an integral molding process; the second fastening seat 51 also has four sheet-like reinforcing ribs evenly arranged along the circumference, and this group of reinforcing ribs forms a continuous integral structure with the surface of the first inclined support 2a or the second inclined support 2b. Example

[0033] A stair railing includes a diagonal safety bar 6, a vertical reinforcing bar 7, and the handrail corner connection structure in Embodiment 1; one end of the diagonal safety bar 6 is connected to a first diagonal support bar 2a or a second diagonal support bar 2b, and the other end is sleeved on the main horizontal bar 1; the vertical reinforcing bar 7 is provided through the vertical guide groove 3 of the main horizontal bar 1, and the bottom surface of the vertical reinforcing bar 7 abuts against the building load-bearing surface. The vertical reinforcing rod 7 is the vertical rod in Embodiment 1, and its function has been explained in Embodiment 1 and will not be repeated here. When assembling the stairs, in the handrail corner connection structure, the first inclined support rod 2a and the second inclined support rod 2b should be set at an axial angle relative to the main crossbar 1 to adapt to the inclined safety rods 6 of the upper and lower stairs. The first inclined support rod 2a is used to connect the inclined safety rod 6 of the lower stairs, and the second inclined support rod 2b is used to connect the inclined safety rod 6 of the upper stairs. Specifically, when assembling the stairs, the first sleeve connection part 21 of the first inclined support rod 2a is set coaxially with the main crossbar 1 and the first inclined support rod 2a is deflected downward by 30° relative to the main crossbar 1. Similarly, the second connection part of the second inclined support rod 2b is set coaxially with the main crossbar 1 and the second inclined support rod 2b is deflected upward by 30° relative to the main crossbar 1. In this embodiment, there are three sets of handrail corner connection structures, and each set of handrail corner connection structures is connected to a pair of upward and downward inclined safety bars 6 respectively. Each set of handrail corner connection structures is arranged parallel to the spatial position, and the vertical reinforcing bar 7 passes through the vertical guide groove of each set of handrail corner connection structures. A single vertical reinforcing bar 7 connects the three sets of handrail corner connection structures in series to form a stair railing. In this way, the overall structure of the stair railing has high strength and is easy to install, making it a preferred solution for construction sites. Note that the 30° upward and downward deflection in this embodiment is an optimal choice for a conventional solution, but irregular stairwells are inevitable. This application uses a coaxial nested design between the first socket connection part 21 and the angle adjustment locking component 5, and uses the second locking bolt 52 to apply radial pressure to achieve stepless adjustment of any angle between the inclined support and the main crossbar 1. During the installation process, the posture of each component can be independently corrected and the adjustment process does not interfere with each other, significantly improving the construction efficiency of irregular space layout.

[0034] Furthermore, refer to Figure 2-5The end of the first inclined support rod 2a or the second inclined support rod 2b away from the main crossbar 1 is constructed as a second connecting part. A guardrail locking assembly 8 is provided on the outside of the second connecting part. The guardrail locking assembly 8 includes a third fastening seat 81 disposed on the outer surface of the first inclined support rod 2a or the second inclined support rod 2b and a third locking bolt 82 assembled in the third fastening seat 81. The third locking bolt 82 passes through the third fastening seat 81 and abuts against the end of the inclined safety bar 6. The guardrail locking assembly 8 is similar in function to the angle adjustment locking assembly 5 and the vertical locking assembly 4. The third fastening seat 81 also has an interference fit metal fitting ring 9 inside, and the outer periphery of the third fastening seat 81 is provided with a number of reinforcing ribs integrally formed with the first inclined support rod 2a or the second inclined support rod 2b.

[0035] In the assembled stair railing system, the handrail corner connection structure adopts a downward concealed design: both the railing locking component 8 and the angle adjustment locking component 5 are positioned downwards, while the vertical locking component 4 is positioned to the inside of the staircase through directional optimization. This integrated layout effectively avoids the potential risk of abrasions from contact between traditional exposed locking components and limbs.

[0036] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0037] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A handrail corner interface structure, characterized by, include: Horizontally extended main crossbar (1); The first diagonal support (2a) is disposed on one side of the main crossbar (1); The second diagonal support (2b) is disposed on the other side of the main crossbar (1) away from the first diagonal support (2a); one end of the first diagonal support (2a) and the second diagonal support (2b) are sleeved on the main crossbar (1); The main crossbar (1) is provided with a vertical guide groove (3) running longitudinally along the axis. The vertical guide groove (3) forms a continuous channel adapted to the passage of a vertical rod. The main crossbar (1) is provided with a vertical locking assembly (4). The vertical locking assembly (4) is configured to press and fix the vertical rod passing through the vertical guide groove (3) to the inner wall of the vertical guide groove (3) by applying radial external force.

2. A handrail corner interface structure according to claim 1, wherein The first oblique support (2a) and the second oblique support (2b) are each provided with a first sleeve connection part (21) at their proximal ends. The two first sleeve connection parts (21) are respectively sleeved on both ends of the main crossbar (1). An angle adjustment and locking assembly (5) is provided on the outside of the first sleeve connection part (21). The angle adjustment and locking assembly (5) fixes the main crossbar (1) to the inner wall of the corresponding first sleeve connection part (21) by radial locking force.

3. A handrail corner interface structure according to claim 2, wherein The vertical locking assembly (4) includes a first fastening seat (41) disposed on the outer wall of the main crossbar (1) and a first locking bolt (42) assembled in the first fastening seat (41). The end of the first locking bolt (42) passes through the first fastening seat (41) and is disposed in the vertical guide groove (3). The angle adjustment locking assembly (5) includes a second fastening seat (51) disposed on the outer surface of the first inclined support (2a) or the second inclined support (2b) and a second locking bolt (52) assembled in the second fastening seat (51). The second locking bolt (52) passes through the second fastening seat (51) and abuts against the end of the main crossbar (1).

4. A handrail corner interface structure according to claim 3, wherein The first fastening seat (41) and the second fastening seat (51) are internally fitted with an interference fit metal fitting ring (9), and the metal fitting ring (9) is internally provided with a threaded hole that mates with the first locking bolt (42) or the second locking bolt (52).

5. The handrail corner interface structure of claim 3, wherein The first fastening seat (41) is provided with a plurality of reinforcing ribs integrally formed with the surface of the main crossbar (1) in the circumferential direction; the second fastening seat (51) is provided with a plurality of reinforcing ribs integrally formed with the surface of the first inclined support (2a) or the second inclined support (2b) in the circumferential direction.

6. The handrail corner interface structure of claim 1, wherein The first inclined support rod (2a) and the second inclined support rod (2b) are both integrally bent pipe parts, with the bend forming an arc transition section.

7. A stair railing, characterized in that It includes a diagonal safety bar (6), a vertical reinforcing bar (7), and a handrail corner connection structure as described in any one of claims 1-6; one end of the diagonal safety bar (6) is connected to the first diagonal support bar (2a) or the second diagonal support bar (2b), and the other end is sleeved on the main crossbar (1); the vertical reinforcing bar (7) is provided through the vertical guide groove (3) of the main crossbar (1), and the bottom surface of the vertical reinforcing bar (7) abuts against the building load-bearing surface.

8. A stair railing according to claim 7, wherein The number of handrail corner connection structures is at least 3 sets, and each set of handrail corner connection structures is arranged in parallel in space. The vertical reinforcing rod (7) passes through the vertical guide groove (3) of each set of handrail corner connection structures.

9. A stair railing according to claim 7, wherein, The end of the first diagonal support (2a) or the second diagonal support (2b) away from the main crossbar (1) is constructed as a second connecting part. A guardrail locking assembly (8) is provided on the outside of the second connecting part. The guardrail locking assembly (8) includes a third fastening seat (81) disposed on the outer surface of the first diagonal support (2a) or the second diagonal support (2b) and a third locking bolt (82) assembled in the third fastening seat (81). The third locking bolt (82) passes through the third fastening seat (81) and abuts against the end of the diagonal safety bar (6).

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