Aluminum alloy glass handrail fixing device for side-mounted column-free stair

Abstract

The utility model relates to the technical field of building construction, and disclose a kind of side-mounted no column stair aluminum alloy glass handrail fixing device. The device adopts modular design, including glass handrail fixed plate, clamping groove, middle decorative cover plate, lower decorative cover plate, U-shaped rubber pad, wedge-shaped rubber strip, and is connected with wall body by expansion bolt to form stable support structure. The device takes aluminum alloy fixed plate as main force component, combines A / B double-piece hollow clamping groove and plum-blossom-shaped expansion bolt layout, realizes the balance of light weight and high strength. The wedge-shaped rubber strip and the self-adapting clamping system formed by U-shaped rubber pad of the device can compensate for glass thickness tolerance and effectively reduce metal collision noise. The device uses welding-free installation process, and is matched with anodized decorative cover plate. It is suitable for various architectural styles, maintenance is more convenient, and safety and aesthetic evaluation are better.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a side-mounted column-free staircase aluminum alloy glass handrail fixing device. Background Technology

[0002] In staircases or stair treads, handrails serve as crucial safety features, and the stability, ease of installation, and aesthetics of their fixing devices directly impact the user experience. Current staircase handrail fixing devices suffer from bulky structures and complex installations. Traditional devices often employ welding or embedded parts for fixation, requiring extensive on-site fabrication, resulting in long construction periods and difficulties in disassembly and maintenance. For example, some devices are fixed using concrete pouring, necessitating destructive removal for later glass replacement or repositioning.

[0003] In existing technologies, stair handrail fixing devices suffer from limitations in material properties. Traditional materials such as galvanized steel plates are prone to rust and corrosion, affecting their service life; stainless steel or wooden handrails are heavy and easily deformed. In addition, direct contact between glass and metal can easily generate stress due to thermal expansion and contraction, increasing the risk of glass breakage.

[0004] Existing stair handrail fixing devices are functionally limited and lack adaptability, failing to accommodate glass of varying thicknesses or irregularly shaped steps. Some devices lack cushioning structures, resulting in noise from metal component collisions and failing to meet the noise reduction requirements of accessible facilities. Furthermore, decorative covers often employ exposed clips, which are poorly integrated with modern architectural styles, lack aesthetic appeal, and are prone to dust accumulation and cleaning. Therefore, we propose a side-mounted, column-free staircase aluminum alloy glass handrail fixing device. Utility Model Content

[0005] The present invention aims to address the shortcomings of the existing technology by providing a side-mounted, column-free staircase aluminum alloy glass handrail fixing device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a side-mounted column-free staircase aluminum alloy glass handrail fixing device, comprising: a glass handrail fixing plate, a glass handrail fixing slot, a middle decorative cover plate, a lower decorative cover plate, a U-shaped rubber pad, a wedge-shaped rubber strip, and expansion bolts.

[0007] As a preferred option, the glass handrail fixing plate is the main load-bearing component of this device. The main structure is made of 5mm thick 5083-H116 aluminum alloy profile with a yield strength ≥270MPa and a total width of 400mm. ANSYS simulation verification shows that it can withstand a dynamic load of 300kg, reducing weight by 40% compared to traditional steel structures.

[0008] As a preferred design, the outer side of the glass handrail fixing slot has a straight surface, while the inner side has a wedge-shaped design. The inner side is equipped with a 1:8 inclined wedge surface, which, together with the horizontal honeycomb support plates, is spaced 200mm apart, achieving a bending stiffness of ≥180MPa, thus balancing lightweight and structural strength.

[0009] As a preferred option, the fixing plate adopts an A / B double-piece hollow structure, which reduces the weight by more than 30% by reducing the amount of material used, while maintaining sufficient mechanical properties.

[0010] Preferably, the U-shaped rubber pad is used in combination with the wedge-shaped rubber strip, which eliminates installation gaps and provides damping buffer, reducing metal-on-metal collision noise. The inner wedge-shaped rubber strip provides a clamping force of ≥150kg through a self-locking effect, while the U-shaped rubber pad eliminates the gap between the glass and the metal, compensating for a tolerance of ±2mm, resulting in even lower metal-on-metal collision noise.

[0011] As a preferred option, the middle and lower decorative covers are installed using concealed snap-fit ​​fasteners. The middle and lower decorative covers are connected to the main body via snap-fit ​​fasteners, and the surfaces are anodized. Matte / glossy coatings are available to suit various architectural styles such as modern minimalist and industrial styles.

[0012] As a preferred option, the middle section of the card slot uses expansion bolt holes arranged in a quincunx pattern with a spacing of 200mm, which, together with the double transverse support plates, form a honeycomb-shaped reinforcement zone, improving the local shear resistance by 30%.

[0013] As a preferred option, the device adopts a modular design, including a glass handrail fixing plate, a slot, a middle decorative cover plate, a lower decorative cover plate, a U-shaped rubber pad, and a wedge-shaped rubber strip. After the rubber components are pre-installed, the device can be fixed simply by drilling holes in the wall and screwing in M12 expansion bolts, thus shortening the installation time for a single component. Beneficial effects

[0014] This utility model provides a side-mounted, column-free staircase aluminum alloy glass handrail fixing device. It has the following beneficial effects:

[0015] (1) Efficient installation and low-cost maintenance. The modular design enables quick installation without welding. After the pre-installed rubber components are installed, they only need to be fixed with expansion bolts, resulting in shorter installation time per piece and higher construction efficiency. The decorative cover can be disassembled by hand, and glass replacement does not require professional tools, reducing maintenance costs. The rubber components can be replaced individually after wear, avoiding the need for complete scrapping.

[0016] (2) Lightweight and high strength are combined. The 5mm thick 5083 aluminum alloy body is 40% lighter than the traditional steel structure, reducing the difficulty of transportation and installation; the double-piece hollow slot combined with the honeycomb reinforcement area has a bending stiffness of ≥180MPa and a load-bearing capacity of 300kg dynamic load, meeting the safety requirements of public places.

[0017] (3) Adaptive clamping and silent performance. The combination of inner wedge-shaped rubber strip and U-shaped rubber pad eliminates the glass installation gap, with tolerance compensation of ±2mm, damping coefficient of 0.35, and metal collision noise is reduced to below 45dB.

[0018] (4) The plum blossom-shaped expansion bolts are arranged with a spacing of 200mm to enhance structural stability and improve resistance to lateral impact. The deformation under 1.5kN impact is ≤1.2mm.

[0019] (5) Environmental adaptability and durability. The anodized decorative cover has strong weather resistance and is suitable for modern architectural styles. The surface coating can maintain its gloss for more than 10 years. The aluminum alloy substrate has passed the GB / T 10289 salt spray test (no corrosion after 1000h) and is suitable for harsh environments such as high humidity and coastal areas.

[0020] (5) Precise fit and safety redundancy. The 1:8 inclination of the inner side of the wedge-shaped slot allows for ±3° tilt adjustment, compatible with glass of different thicknesses and irregular steps; the double horizontal support plate and honeycomb reinforcement area improve local shear resistance by 30%, avoiding structural deformation under long-term use. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0023] Figure 1 This is an elevation view of the present utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the present invention;

[0025] Illustration: 1. Glass handrail fixing plate, 2. Glass handrail fixing slot, 3. Middle decorative cover plate, 4. Lower decorative cover plate, 5. U-shaped rubber pad, 6. Wedge-shaped rubber strip, 7. Expansion bolt; Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] A side-mounted, column-free staircase aluminum alloy glass handrail fixing device, such as Figure 1 and Figure 2 As shown, the modular component design includes a glass handrail fixing plate 1, a glass handrail fixing slot 2, a middle decorative cover plate 3, a lower decorative cover plate 4, a U-shaped rubber pad 5, a wedge-shaped rubber strip 6, and an expansion bolt 7.

[0028] The glass handrail fixing plate 1 is the main load-bearing component of this device. The main structure is made of 5mm thick aluminum alloy and has a standard size design with a total width of 400mm, taking into account both strength and lightweight requirements. The glass handrail fixing plate 1, glass handrail fixing slot 2, middle decorative cover plate 3, lower decorative cover plate 4, U-shaped rubber pad 5 and wedge-shaped rubber strip 6 are connected to the wall through expansion bolts 7 to form a stable support structure.

[0029] Furthermore, before implementation, the base layer must be leveled. Cement-based self-leveling mortar is used to finely level the sides of the stair treads, with flatness strictly controlled within ±1mm. Before construction, loose dust on the base layer must be cleaned, and an appropriate amount of bonding agent is sprayed to enhance adhesion. A 2m straightedge and laser level are used to calibrate the reference surface to ensure that the verticality and horizontality errors of subsequent installation are minimized.

[0030] Further, positioning marking and drilling. Temporarily fix the glass handrail fixing plate 1 to the side of the step. Using the center line of the slot as a reference, mark the expansion bolt hole positions with a marker. When drilling, use a φ12mm alloy drill bit, keeping the drill bit perpendicular to the step surface. Drill in two stages: first drill a pilot hole to a depth of 100mm, then enlarge the hole to the final depth of 150mm. After drilling, use an air gun to remove dust from the hole to prevent debris residue from affecting the anchoring strength.

[0031] Next, install the expansion bolts. Use expansion bolts 6 to fix the glass handrail fixing plate 1 to the side of the stair treads. Use M12×100mm internal hex bolts. Before installation, apply modified epoxy resin anchoring adhesive to the bolt shank. Insert the bolt vertically into the bottom of the drilled hole and gently tap it with a hammer to ensure it is fully in place. Use a torque wrench to tighten the nuts in two stages to a torque of 80 N·m. After the first pre-tightening, let it stand for 10 minutes to allow the adhesive to cure. Then, tighten the nuts to the specified torque value, ensuring the fixing plate's pull-out resistance is ≥1.2 kN.

[0032] Next, assemble the decorative cover plates. Install the middle decorative cover plate 3 and the lower decorative cover plate 4 in the order of middle to bottom. Align the cover plate clips with the reserved grooves on the fixing plate, and press down simultaneously with both hands until a "click" sound is heard. Check that the gap between the cover plate joints is ≤0.5mm and the surface flatness error is <1mm. If it is a curved step, the cover plate needs to be preheated to 40℃ before bending and shaping, and then installed after cooling.

[0033] Next, position the glass handrail. Slowly push the glass handrail into the fixing slot 2, ensuring that the U-shaped rubber pad 5 completely covers the edge of the glass. Two people are required for installation: one person holds the handrail to keep it level, and the other person taps the end of the handrail one by one to the bottom of the slot. During the process, use a feeler gauge to check that the gap between the handrail and the side wall of the slot is ≤0.3mm to ensure even force distribution.

[0034] Next, tighten the wedge-shaped rubber strip. Starting from one end of the handrail, gradually push the wedge-shaped rubber strip 6 along the inclined surface of the groove, tapping it lightly with a rubber mallet every 50mm until the handrail wobble is less than 2mm. After installation, use a spirit level to check the overall levelness of the handrail. If the error exceeds the standard, adjust the embedding depth of the wedge-shaped strip to correct it. The final tightening torque should reach 25N·m.

[0035] The working principle of this utility model:

[0036] This device forms a core load-bearing frame through the glass handrail fixing plate 1 and the glass handrail fixing slot 2. The glass handrail fixing plate 1, as the main load-bearing component, is made of 5mm thick 5083-H116 aluminum alloy profile and is anchored to the wall through plum blossom-shaped expansion bolt holes (spaced 200mm) to distribute the handrail load to the building structure. The slot 2, through an A / B double-piece hollow design, forms a honeycomb-shaped reinforcement zone with the horizontal honeycomb support plate (spaced 200mm), with a bending stiffness ≥180MPa, ensuring that the deformation is ≤1.2mm under dynamic loads (such as crowd compression).

[0037] The device features a double-buffered structure formed by the wedge-shaped rubber strip 6 and the U-shaped rubber pad 5. The inner wedge-shaped rubber strip generates radial pressure when the glass handrail is inserted through a 1:8 inclined plane self-locking effect, compensating for the glass thickness tolerance of ±2mm and providing a clamping force of ≥150kg. The U-shaped rubber pad fills the gap between the glass and the side wall of the slot, eliminating direct metal-to-metal contact, with a damping coefficient of 0.35, reducing collision noise to below 45dB.

[0038] The device uses plum blossom-shaped expansion bolts with epoxy resin anchoring agent. The pull-out force of a single bolt is ≥1.2kN, and the overall seismic performance of the system passes the 1.5kN lateral impact test.

[0039] The middle decorative cover plate 3 and the lower decorative cover plate 4 of this device are fitted with the fixing plate by a hidden buckle. The surface is anodized and the color fastness is ≥4, which is suitable for a variety of architectural styles. The decorative cover plate adopts a modular disassembly and assembly design. The cover plate can be disassembled by hand. Glass replacement can be completed by simply loosening the wedge strip, which improves maintenance efficiency.

[0040] This device incorporates double transverse support plates, which, together with the honeycomb reinforcement zone, form an "I"-shaped cross section, enhancing local shear resistance.

[0041] This device anchors the fixing plate to the wall using expansion bolts → pre-installs U-shaped rubber pads and wedge strips → installs the decorative cover plate; after the glass handrail is inserted into the slot, the wedge rubber strip self-locks and fixes itself → the U-shaped pads eliminate vibration → the decorative cover plate protects the internal structure; after removing the cover plate, the rubber components can be replaced separately without damaging the original structure.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A side-mounted, column-free staircase aluminum alloy glass handrail fixing device, characterized in that, It includes a glass handrail fixing plate (1), a glass handrail fixing slot (2), a middle decorative cover plate (3), a lower decorative cover plate (4), a U-shaped rubber pad (5), a wedge-shaped rubber strip (6), and an expansion bolt (7).

2. The side-mounted column-free staircase aluminum alloy glass handrail fixing device according to claim 1, characterized in that, The glass handrail fixing plate (1) is the main load-bearing component of this device. The main structure is made of 5mm thick aluminum alloy and has a standard size design with a total width of 400mm, taking into account both strength and lightweight requirements.

3. The side-mounted column-free staircase aluminum alloy glass handrail fixing device according to claim 2, characterized in that, The outer side of the glass handrail fixing slot (2) is a straight surface design, and the inner side is a wedge-shaped design.

4. The side-mounted column-free staircase aluminum alloy glass handrail fixing device according to claim 2, characterized in that, The glass handrail fixing plate (1) adopts an A / B double-piece hollow structure, which reduces its weight by more than 30% by reducing the amount of material used, while maintaining sufficient mechanical properties.

5. A side-mounted column-free staircase aluminum alloy glass handrail fixing device according to claim 1, characterized in that, The U-shaped rubber pad (5) and the wedge-shaped rubber strip (6) are used together to eliminate installation gaps and provide damping buffer, thereby reducing metal collision noise.

6. The side-mounted column-free staircase aluminum alloy glass handrail fixing device according to claim 1, characterized in that, The middle decorative cover plate (3) and the lower decorative cover plate (4) are installed with hidden snap fasteners, and the surface anodized treatment can match a variety of architectural styles.

7. A side-mounted column-free staircase aluminum alloy glass handrail fixing device according to claim 3, characterized in that, The middle section of the glass handrail fixing slot (2) is provided with expansion bolt holes arranged in a plum blossom pattern, with a spacing of 200mm, which, together with the double horizontal support plate, forms a honeycomb-shaped reinforcement area.

8. A side-mounted column-free staircase aluminum alloy glass handrail fixing device according to claim 1, characterized in that, The device adopts a modular design and includes a glass handrail fixing plate (1), a glass handrail fixing slot (2), a middle decorative cover plate (3), a lower decorative cover plate (4), a U-shaped rubber pad (5), and a wedge-shaped rubber strip (6). It is connected to the wall through expansion bolts (7) to form a stable support structure.

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