A movable staircase

Abstract

This utility model relates to a movable staircase, comprising: an upper side bar and a lower side bar, both straight rods, inclined at intervals and parallel to each other; a tread, a rectangular short plate, with its two corners hinged to the upper and lower side bars on the same side respectively; a rocker arm and a support; both the rocker arm and the support are short rods; the lower end of the rocker arm intersects with the upper end of the lower side bar, and its upper end is hinged to the lower end of the support; the support is vertically fixed to the front end face of the steel inclined staircase, and its upper end is hinged to the upper end of the upper side bar; a support rod, a straight rod, with its upper end hinged to the upper part of the lower side bar, and its lower end is a free end, capable of being placed vertically on the elevator lobby floor; the lower ends of the upper and lower side bars are detachably connected to the elevator lobby floor. This utility model uses the action of two four-bar linkages to make the staircase flip up and retract, meeting the special needs of wheelchair passage or transporting large items, creating favorable conditions for the promotion of elevator installation.

Description

Technical Field

[0001] This utility model relates to a building structure, and more particularly to a staircase that can be flipped and retracted, specifically a movable staircase. Background Technology

[0002] With the ongoing urban renewal in my country, adding elevators to existing old buildings has become a major way to improve residential functionality and quality. In the process of elevator installation, to comply with the national "Barrier-Free Access Law" and better meet user needs, the single-floor access method is increasingly being adopted.

[0003] According to existing regulations, this method typically requires the removal of the concrete two-flight staircase and turning platform within the stairwell. A steel horizontal corridor and a single-flight steel inclined staircase ("one horizontal, one inclined") are then designed and installed according to the original staircase dimensions. An elevator lobby, level with the entrance platform, is then extended outwards from the ring beam. The elevator doorway, elevator corridor, and elevator car are centrally located, enabling elevator access to each floor and allowing for unobstructed fire escape routes. While this renovation largely meets residents' needs for stair access and fire safety, the steel inclined staircase, extending from the entrance platform down to the building's exterior ring beam, still exceeds the newly designed and extended elevator lobby floor by several steps. Because the elevator lobby's depth is limited by building planning, these extended steel inclined staircase steps occupy a significant portion of the lobby's depth, hindering wheelchair access and making it inconvenient to transport large items via elevator. This hinders the widespread adoption of external elevators.

[0004] Therefore, improvements are urgently needed to better meet market demands. Utility Model Content

[0005] The purpose of this utility model is to address the problems encountered in the construction of external staircases by providing a movable staircase that can be flexibly retracted when needed to meet the space requirements for wheelchair passage or transporting large items in the elevator lobby, thus promoting the adoption of external elevators.

[0006] The technical solution of this utility model is: A movable staircase, comprising, Both the upper and lower side bars are straight rods, arranged at an angle that is parallel to each other and at intervals; there are two sets of upper and lower side bars, arranged parallel to each other on the left and right; The pedal is a rectangular short plate, with its two corners hinged to the upper and lower side bars on the same side, respectively, so that it is placed horizontally between the two sets of upper and lower side bars; there are multiple pedals, which are spaced apart and arranged in parallel. A rocker arm and a support; both the rocker arm and the support are short rods; the lower end of the rocker arm is hinged to the upper end of the lower side rod, and its upper end is hinged to the lower end of the support; the support is vertically fixed to the front end face of the steel inclined ladder, and its upper end is hinged to the upper end of the upper side rod; there are two sets of rocker arms and supports, corresponding to the upper and lower side rods located on different sides respectively; The support rod is a straight rod with a length greater than the distance between the steel inclined ladder and the elevator hall floor. Its upper end is hinged to the upper end of the lower side rod, and its lower end is a free end, so that it can be placed vertically on the elevator hall floor and support the lower side rod after it is flipped up. There are two support rods, corresponding to the lower side rods on different sides. The lower ends of the upper and lower side rods are detachably connected to the elevator hall floor.

[0007] Furthermore, the upper end of the support is flush with the upper end of the steel inclined ladder.

[0008] Furthermore, the hinge point of the support rod and the lower side rod coincides with the hinge point of the uppermost pedal and the lower side rod.

[0009] Furthermore, the lower ends of the upper and lower side rods are respectively connected to the elevator hall floor via footrests.

[0010] Furthermore, the spacing of the treads is the same as the step distance and depth of the steel inclined ladder.

[0011] Furthermore, the inclination angles of the upper and lower side rods are the same as the inclination angle of the steel inclined ladder.

[0012] Furthermore, it also includes a top block, which is located at the lower end of the rocker arm and can abut against the front end face of the steel inclined ladder when the staircase is in normal position.

[0013] The beneficial effects of this utility model are: This utility model features a reasonable design, simple structure, and convenient use. When needed, the staircase can be raised and retracted via two four-bar linkages, accommodating wheelchair access or the movement of large items in the elevator lobby. Simultaneously, it can form a temporary guardrail at the end of the steel inclined staircase, ensuring safety. Therefore, it fully meets market demand and promotes the adoption of external elevators. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention when unfolded.

[0015] Figure 2 yes Figure 1 Top view.

[0016] Figure 3 This is a cross-sectional view of the present invention when it is folded up.

[0017] Figure 4 yes Figure 1 A magnified view of part A.

[0018] Figure 5 yes Figure 1 A magnified view of part B.

[0019] Figure 6 yes Figure 4 CC section view.

[0020] 1-Steel inclined ladder; 2-Support; 3-Rocker; 4-1 Upper side rod; 4-2 Lower side rod; 5-Step; 6-Rear baffle; 7-Column; 8-Ring beam; 9-Foot; 10-Elevator hall floor; 12-Elevator door opening; 15-Support rod; 16-Pin; 18-Top block; 19-Cotter pin. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 6 As shown.

[0023] A movable staircase includes: a support 2, a rocker arm 3, an upper side bar 4-1, a lower side bar 4-2, a tread 5, a support rod 15, and a top block 18. When adding an elevator, the original two-flight concrete staircase per floor was removed, and a one-flight steel inclined staircase 1 per floor was installed. An elevator doorway 12 is provided on the exterior wall of the elevator hall 10, and a support column 7 is added on each side of the opening between the bottom surface of the steel inclined staircase 1 and the ring beam 8. Simultaneously, a rear baffle 6 is installed between the support columns 7. The rear baffle 6 is a straight plate, its size adapted to the opening, and it seals the opening to prevent falls.

[0024] Both the upper side rod 4-1 and the lower side rod 4-2 are straight rods, arranged at an angle that is parallel to each other. There are two sets of upper side rods 4-1 and lower side rods 4-2, arranged parallel to each other, and corresponding to the two sides of the steel inclined ladder 1.

[0025] The tread 5 is a rectangular short plate, with its two corners hinged to the upper side bar 4-1 and lower side bar 4-2 on the same side, respectively, so that it is horizontally positioned between the two sets of upper and lower side bars and is horizontal in normal use. Multiple treads 5 are arranged in a spaced and parallel manner, with the spacing matching that of the steel inclined ladder, meeting the needs of going up and down the stairs. Simultaneously, the upper side bar 4-1, lower side bar 4-2, and two adjacent treads 5 form the first four-bar linkage structure, allowing the upper side bar to rotate around its upper hinge point by external force, simultaneously causing the upper and lower side bars to move closer together, thus closing the staircase.

[0026] The support 2 is a short rod, vertically fixed to the front end face of the steel inclined ladder 1. Its upper end is hinged to the upper end of the upper side rod 4-1, allowing the upper side rod to rotate around the hinge point. Preferably, the upper end of the support 2 is flush with the upper end face of the steel inclined ladder 1 to fully meet the needs of subsequent staircase rotation.

[0027] The rocker arm 3 is a short rod, with its lower end hinged to the upper end of the lower side rod 4-2 and its upper end hinged to the lower end of the support 2. This forms a second four-bar linkage structure with the rocker arm 3, support 2, upper side rod 4-1, and tread 5. This allows the tread 5 to rotate and move under the influence of the rocker arm 3 and upper side rod 4-1, bringing the lower side rod 4-2 closer to the upper side rod 4-1, thus retracting the staircase. Preferably, the lower end of the rocker arm 3 is provided with a top block 18. This top block 18 is block-shaped and installed on the side of the rocker arm 3 facing the steel inclined ladder 1. Its thickness is comparable to that of the support 2. Therefore, when the staircase is in normal use, the top block can abut against the front surface of the steel inclined ladder 1, enhancing the supporting force of the lower side rod 4-2.

[0028] The rocker arm 3 and the support 1 are both in two sets, corresponding to the upper rod 4-1 and the lower rod 4-2 located on different sides, respectively, to meet the usage requirements.

[0029] The inclination angles of the upper side bar 4-1 and the lower side bar 4-2 are the same as the inclination angle of the steel inclined ladder 1, ensuring smooth passage and a consistent walking rhythm. Simultaneously, the lower ends of the upper side bar 4-1 and the lower side bar 4-2 are movably connected to the elevator hall floor 10 via anchors 9. These anchors 9 are fixed to the elevator hall floor 10 and connected to either the upper side bar 4-1 or the lower side bar 4-2 via pins 16. This ensures both the stability of the upper and lower side bars and allows for easy disassembly, meeting the requirements for staircase rotation.

[0030] The support rod 15 is a straight rod, longer than the distance between the steel inclined staircase and the elevator hall floor. Its upper end is hinged to the upper part of the lower side rod 4-2, and its lower end is free. Under normal use, the lower end of the support rod 15 rests on the elevator hall floor 10. When the staircase rotates upwards, the support rod 15 is in an upright position, and its lower end can rest against the elevator hall floor 10, providing strong support for the staircase. There are two support rods 15, corresponding to the lower side rods on different sides, ensuring stable support. Preferably, the hinge point of the support rod 15 and the lower side rod 4-2 coincides with the hinge point of the uppermost step and the lower side rod, and the length of the support rod is approximately equal to the distance from the corner where the support column 7 intersects the elevator hall floor 10 to the hinge point of the support rod, allowing the lower end of the support rod to rest against this corner to prevent slippage.

[0031] All the hinges described herein employ a structure of pin 16 and cotter pin 19 for easy installation and use.

[0032] The method of using this utility model is as follows: When wheelchair access or the transport of large items is required, the staircase needs to be flipped up. First, the pins at the base are pulled out, separating the lower ends of the upper and lower side bars from the base. Then, through the action of two four-bar linkages, the upper or lower side bar is pushed upwards, causing it to gradually close automatically while rotating upwards. Once fully closed when rotated to a vertical position, the support rod is placed back in place to prevent the staircase from flipping downwards. Thus, even when the depth of the elevator lobby is limited by planning constraints, by designing the staircase section extending into the elevator lobby as movable, the staircase can be retracted as needed, freeing up the elevator lobby area and facilitating wheelchair access or the transport of large items. Then, the operation is reversed to unfold the staircase back to its original state, meeting normal passage requirements. Therefore, this utility model effectively solves the problems encountered after elevator installation in special situations such as wheelchair access or the transport of large items, creating favorable conditions for the promotion of elevator installation.

[0033] The parts not covered in this utility model are the same as or can be implemented using existing technologies.

Claims

1. A movable staircase, characterized in that, include, Both the upper and lower side bars are straight rods, arranged at an angle that is parallel to each other vertically; there are two sets of upper and lower side bars, arranged parallel to each other horizontally. The pedal is a rectangular short plate, with its two corners hinged to the upper and lower side bars on the same side, respectively, so that it is placed horizontally between the two sets of upper and lower side bars; there are multiple pedals, which are spaced apart and arranged in parallel. A rocker arm and a support; both the rocker arm and the support are short rods; the lower end of the rocker arm intersects with the upper end of the lower side rod, and its upper end is hinged to the lower end of the support; the support is vertically fixed to the front end face of the steel inclined ladder, and its upper end is hinged to the upper end of the upper side rod; there are two sets of rocker arms and supports, corresponding to the upper and lower side rods on different sides respectively; and The support rod is a straight rod with a length greater than the distance between the steel inclined ladder and the elevator hall floor. Its upper end is hinged to the upper part of the lower side rod, and its lower end is a free end, so that it can be placed vertically on the elevator hall floor and support the lower side rod after it is flipped up. There are two support rods, one for each side of the lower side rod. The lower ends of the upper and lower side rods are detachably connected to the elevator hall floor.

2. The movable staircase according to claim 1, characterized in that, The upper end of the support is flush with the upper surface of the steel inclined ladder.

3. The movable staircase according to claim 1, characterized in that, The hinge point of the support rod and the lower side rod coincides with the hinge point of the uppermost pedal and the lower side rod.

4. The movable staircase according to claim 1, characterized in that, The lower ends of the upper and lower side rods are connected to the elevator hall floor via foot anchors.

5. The movable staircase according to claim 1, characterized in that, The spacing between the treads is the same as the step distance and depth of the steel inclined ladder.

6. The movable staircase according to claim 1, characterized in that, The inclination angles of the upper and lower side bars are the same as the inclination angles of the steel inclined ladder.

7. The movable staircase according to claim 1, characterized in that, It also includes a top block, which is located at the lower end of the rocker arm and can abut against the front end face of the steel inclined ladder when the staircase is in normal position.

8. The movable staircase according to claim 1, characterized in that, It also includes a rear baffle, which is a straight plate and is sized to fit the opening behind the steel inclined ladder, and seals the opening.

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