Slope outer side-hung steel structure safety door device

Abstract

The invention discloses a slope out-swinging steel structure safety door device. According to the device, an upper sub-door and a lower sub-door are hinged to form a composite door body. The upper sub-door is hinged to the door shaft frame through a rotating shaft hinge and can horizontally rotate around the door shaft frame; the lower sub-door is hinged to the lower bevel edge of the upper sub-door through a sub-door hinge, and the far end of the bottom is provided with a roller dynamically abutting against the slope. During opening, the electric control motor drives the upper sub-door to horizontally rotate outwards by 90 degrees + alpha, and alpha is the inclination angle of the upper bevel edge of the lower sub-door and is matched with the slope gradient; and meanwhile, the sub-door is driven by force generated when the slope faces abut against the rolling wheels to automatically turn to the horizontal storage state from the vertical protection state around the hinge points. In the completely-opened state, the lower sub-door is flattened and attached to the slope face, the projection width is consistent with the clear width of the frame, it is ensured that the clear width of the channel is completely released, and space zero-occupation is achieved. And during closing, the upper sub-door is retracted inwards, and the lower sub-door automatically resets to a vertical state under the action of self weight after slope collision is relieved and collides with the frame to form gravity self-locking, so that continuous closed protection is completed. According to the invention, the slope surface is used as an element for driving the state conversion of the door body, so that space zero-occupation and gradient self-adaption of slope channel protection are realized; the steel structure door body and the wear-resistant rollers are combined to absorb vibration impact, so that the impact resistance and the reliability are improved; and safety guarantee and energy efficiency optimization are enhanced through the dual mechanisms of electric control driving and gravity self-locking.

Description

Technical Field

[0001] The field of building slope passage safety protection involves steel structure flat-hinged safety doors, which achieve slope adaptive opening and closing through a hinged double-door structure. Background Art

[0002] The design of ramp access protection systems has long been constrained by structural conflicts caused by the slope's inclination. Traditional swing doors must rotate horizontally more than 90 degrees to open, significantly encroaching on the clear width of narrow ramps and easily causing vehicle scratches. Reducing the opening angle also makes it impossible to accommodate large vehicles. Rolling shutter doors attempt to avoid horizontal space occupation, but they rely on vertical installation space at the top. The top of a slope is often squeezed by building beams or roof structures, making installation extremely difficult. Folding doors alleviate spatial conflicts through multi-jointed structures, but their hinges are prone to deformation and seizure in the vibration environment of the slope, resulting in poor long-term reliability and high maintenance costs. Even more serious are safety risks: manual doors rely on manual locking, posing a risk of management oversight, and electric doors are prone to circuit failure on wet ramps, potentially causing the door to open unexpectedly or even causing vehicles to slide. Existing improvements (such as segmented doors) have partially alleviated this conflict, but they fail to resolve the inherent conflict between the slope's geometry and the door's movement. Opening the door still blocks access or requires additional widening of the ramp base, essentially sacrificing spatial efficiency and architectural rationality.

[0003] To address these shortcomings, this field urgently needs fundamental breakthroughs through collaborative design: first, the slope gradient must be transformed into a driving factor for door movement, using geometric adaptation to eliminate spatial encroachment; second, a passive mechanical transmission mechanism must be developed to drive door state transitions through the synergistic effect of slope resistance and gravity, reducing reliance on external power; simultaneously, reliability design must be strengthened, integrating impact-resistant structures and self-locking functions to resist vibration and shock; finally, a dual insurance system of electronic control and physical transmission must be established, balancing automated management and fault safety. The core of these improvements lies in reconstructing the interactive logic between the door and the slope, transforming terrain constraints into technical advantages, and fundamentally balancing the contradictions between safety protection, spatial efficiency, and environmental adaptability. Summary of the Invention

[0004] This invention provides a sloped, outward-swinging steel safety door device. This device addresses the drawbacks of traditional protective doors on slopes, such as large space encroachment, poor slope adaptability, and potential safety hazards. By synergizing the design of a hinged double-door structure with the geometric characteristics of the slope, this device achieves a fundamental breakthrough. The device consists of an upper and lower hinged sub-door, forming a composite door body. The upper sub-door is horizontally hinged to the pivot frame via a pivot hinge and driven horizontally by an electronically controlled motor. The lower sub-door's top is connected to the lower sloped edge of the upper sub-door via a sub-door hinge, and a wear-resistant roller is mounted at the far end of the bottom, which dynamically contacts the slope surface. Its core innovation lies in transforming the slope surface into a passive force element that drives the movement of the door body: when opening, the slope resistance force pushes the roller, forcing the lower sub-door to automatically flip from a vertical protective state to a horizontal storage state around the hinge point; at the same time, the upper sub-door rotates to a precisely designed angle of 90°+α (α is the inclination angle of the upper bevel of the lower sub-door, which geometrically matches the slope gradient), so that when the lower sub-door is flattened, the projected width completely coincides with the net width of the frame, completely releasing the net width of the channel and achieving zero space encroachment.

[0005] This design combines the dual advantages of geometric parameters and mechanical conduction: during the closing process, the lower sub-door automatically resets to a vertical state under the action of its own weight after releasing the resistance of the slope, and uses the potential energy of gravity to achieve a sealed contact with the non-rotating axis frame, forming a gravity self-locking protection that does not require external locks. The steel structure door frame is integrated with wear-resistant rollers to effectively absorb the vibration impact of the slope, breaking through the defect of traditional folding doors that are easy to get stuck; the electronic control system and the gravity self-locking mechanism constitute a double safety guarantee, which not only avoids manual locking omissions, but also prevents the risk of equipment failure. The present invention fundamentally reconstructs the logic of slope channel protection. Through the collaborative mechanism of "slope drive flip + precise corner matching", it maximizes traffic efficiency while ensuring safety and sealing, providing a high-reliability solution for scenarios such as underground garages and logistics ramps. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate the structural composition and motion principle of the device of the present invention in different states.

[0007] like Figure 1-3 As shown, Figure 1 This is a front view of the safety door device of the present invention in a closed state; Figure 2 This is a side view of the safety door device of the present invention in the open state; Figure 3 This is a top view of the safety door device of the present invention in the open state.

[0008] The device mainly comprises: an upper sub-door (1), a lower sub-door (2), a rotating axis frame (3), a roller (4), an electric control motor (5), a non-rotating axis frame (6), a rotating axis hinge (7), a sub-door hinge (8) and other components, and also involves a structural wall column (9) and a slope surface (10). Among them, the upper sub-door (1) is hinged to the rotating axis frame (3) through multiple sets of rotating axis hinges (7), and is driven to rotate horizontally by the electric control motor (5) installed on the rotating axis frame (3); the lower sub-door (2) is hinged to the bottom edge of the upper sub-door (1) through the sub-door hinge (8), and a roller (4) that contacts the slope surface (10) is installed at the far end of the bottom, and the roller (4) and the lower sub-door (2) are hinged in a directional rotation manner; the rotating axis frame (3) and the non-rotating axis frame (6) are both fixed to the side of the structural wall column (9) of the slope channel, serving as a load-bearing component and a closed limiting component respectively.

[0009] In the closed state ( Figure 1 ), the upper sub-door (1) and the lower sub-door (2) are in a coplanar vertical state, especially one side is tightly against the non-rotating axis frame (6), forming a continuous closed protective surface. During the opening process, the electric control motor (5) drives the upper sub-door (1) to rotate horizontally outward around the rotating axis frame (3), and drives the lower sub-door (2) to move synchronously through the sub-door hinge (8); when the roller (4) contacts the slope surface (10), the lower sub-door (2) is affected by the slope resistance force and gradually changes from a vertical state to a horizontal state around the sub-door hinge (8); when it is fully opened ( Figure 2-3 ), the upper sub-door (1) rotates at an angle greater than 90°, and the lower sub-door (2) is completely flattened and fits the slope surface (10), with its projection width overlapping the frame. When closing and resetting, the electric control motor (5) reverses and drives the upper sub-door (1) inward. After the lower sub-door (2) releases the slope resistance, it automatically swings back to a vertical state around the sub-door hinge (8) under the action of its own weight and re-engages with the non-rotating axis frame (6). DETAILED DESCRIPTION

[0010] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0011] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0012] The core of this invention lies in the synergistic effect of the hinged double-door structure and slope mechanics. The device consists of an upper and lower sub-door hinged together to form a composite door body. The upper sub-door is horizontally hinged to the side of the pivot frame via a pivot hinge and is driven by an electronically controlled motor for horizontal rotation. The top of the lower sub-door is connected to the lower bevel of the upper sub-door via a sub-door hinge, and the far end of the bottom is mounted with a wear-resistant engineered roller that dynamically contacts the slope surface. The key to implementation is ensuring that the inclination angle α of the upper bevel of the lower sub-door strictly matches the slope gradient, while also setting the full opening angle of the upper sub-door to 90° + α.

[0013] The opening and closing operations achieve a functional closed loop through passive force transmission: During the opening process, the electronically controlled motor drives the upper sub-door to rotate horizontally outward, pulling the lower sub-door in synchronous motion via the sub-door hinge. When the roller contacts the slope, the resistance force exerted by the slope on the roller is decomposed into a component perpendicular to the plane of the lower sub-door, generating a turning torque around the sub-door hinge, which automatically propels the lower sub-door from its vertical protective position to a horizontal storage position. During this period, the upper sub-door continuously rotates to an angle of 90°+α, allowing the lower sub-door to completely flatten and conform to the slope. Its projected width precisely coincides with the clear width of the passage formed by the rotating and non-rotating axis frames, achieving zero space encroachment. The closing process is initiated by the reverse rotation of the electronically controlled motor, with the upper sub-door retracting inward, driving the lower sub-door back. Once the roller clears the slope, the slope's resistance disappears, and the lower sub-door automatically swings back to its vertical position around the sub-door hinge under its own weight, returning to its coplanar position with the upper sub-door. Finally, the upper sub-door rotates until the edges on both sides abut the rotating axis frame and the non-rotating axis frame respectively. At this time, the lower sub-door uses the gravitational potential energy to form a locking force with the non-rotating axis frame to complete the gravity self-locking sealing protection.

[0014] Key technical elements requiring implementation enhancement: The slope drive mechanism relies on the rolling friction between the slope surface and the rollers to transmit power, eliminating the need for an additional power unit for the lower sub-door's state transitions; the α angle in geometric parameter design must be measured and calibrated to ensure complete projection overlap; gravity self-locking is achieved through the mass distribution of the lower sub-door, with its center of gravity designed to be biased toward the non-rotating axis frame to enhance locking reliability; vibration resistance is ensured by the coordinated articulation of the steel door frame and the rollers, which utilize a polyurethane-coated steel core structure to absorb slope vibration shock. This implementation transforms terrain limitations into technical advantages through the passive transmission logic of "slope force-driven flip → gravity self-locking closed loop." The electronic control system only needs to drive the upper sub-door, reducing energy consumption by over 60%. A dual protection mechanism (electronic control command + physical gravity lock) ensures fail-safe operation in humid and vibrating environments, completely eliminating the spatial conflicts and jamming risks of traditional solutions. Example

[0015] In practical application at the ramp entrance and exit of a building's underground garage, the device demonstrated remarkable adaptability. The ramp had a 12% slope and a clear passage width of 4.2 meters. The device customized the door's overall width to these parameters: the upper sub-door was horizontally hinged to a pivot frame fixed to the structural wall stud via a pivot hinge, and the hinge base integrated an electronically controlled motor drive system. The top of the lower sub-door was connected to the lower bevel of the upper sub-door via a sub-door hinge, and a wear-resistant roller was mounted at the far end of the lower door, which contacted the sloped surface. The upper bevel angle of the lower sub-door was precisely set to 7° for a 12% slope, ensuring geometric coordination.

[0016] The actual operation process clearly reflects the core technology logic: when the electronic control system receives the opening command, the electronic motor drives the upper sub-door to rotate horizontally outward, and pulls the lower sub-door to move synchronously through the sub-door hinge. When the roller contacts the slope surface, the slope resistance force forces the lower sub-door to flip around the hinge point from the vertical protection state to the horizontal storage state; at the same time, the upper sub-door rotates to 97° (90°+α) position, so that the lower sub-door is completely flattened and fits the slope surface. The projected width precisely coincides with the clear width of the channel formed by the rotating axis frame and the non-rotating axis frame, achieving a clear width of 4.2m with zero encroachment. After the vehicle passes, the closing command triggers the electronic motor to reverse, and the upper sub-door retracts, driving the lower sub-door back; after the roller leaves the slope surface, the lower sub-door relies on self-reset to a vertical state, and the seals on both sides abut the non-rotating axis frame to form gravity self-locking, completing continuous closed protection.

[0017] This implementation validated the device's innovative value: the steel frame effectively protects against accidental vehicle collisions; the electronic control system and gravity self-locking provide dual protection, eliminating management oversights; and the ramp drive mechanism ensures smooth operation even at a 12% slope. Compared to traditional solutions, traffic efficiency increased by over 40% and maintenance costs decreased by 60%, fundamentally resolving spatial conflicts and safety hazards associated with sloped underground garages.

[0018] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A sloped outward-opening steel structure safety door device, characterized by: A composite door body is formed by an upper sub-door and a lower sub-door hinged by sub-door hinges; the upper sub-door is hinged to the rotating shaft frame through a rotating shaft hinge and is driven by an electric motor to rotate horizontally; a roller is provided at the far end of the bottom of the lower sub-door, which dynamically contacts the slope surface; the resistance force of the slope surface on the roller drives the lower sub-door to automatically flip over, realizing the conversion between the vertical protection state and the horizontal storage state; when the upper sub-door is fully opened, the rotation angle is 90°+α (α is the inclination angle of the upper hypotenuse of the lower sub-door), and α is geometrically matched with the slope gradient, so that when the lower sub-door is flattened and fits the slope surface, the projected width is consistent with the net width of the frame, realizing the complete release of the net width of the channel.

2. The sloped outward-opening steel structure safety door device according to claim 1, characterized in that: The state conversion of the lower sub-door is driven by the slope resistance force and gravity. When opening, the slope resistance force drives the flip. When closing, the resistance is released and the door is reset to the vertical state by itself, and the resistance to the non-rotating axis frame forms gravity self-locking.

3. The sloped outward-opening steel structure safety door device according to claim 1, characterized in that: The composite door body adopts a steel structure and integrates wear-resistant rollers hinged to the lower sub-door, which absorb slope vibration impact through rolling resistance.

4. The sloped outward-opening steel structure safety door device according to claim 1, characterized in that: In the closed state, the upper sub-door and the lower sub-door are coplanar and perpendicular, and the seal abuts the non-rotating axis frame; when fully opened, the lower sub-door is horizontally stored in the slope surface, and the net width of the passage is fully released.

5. A sloped outward-opening steel structure safety door device according to any one of claims 1 to 4, characterized in that: By coordinating the articulated double-door structure with the slope geometry, the slope surface is transformed into a passive driving element for the door movement, achieving slope adaptation, zero space encroachment and gravity self-locking protection.

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