An assembled prefabricated stair

Abstract

The utility model relates to an assembly type prefabricated stair, including stair body, set up between the horizontal sliding hinge support of the connecting end of stair body and upper platform beam and set up between the fixed hinge support of the lower connecting end of stair body and lower platform beam. The utility model is equipped with the slide, upper backing plate and baffle between the upper connecting end of stair body and upper platform beam, realizes the smooth, impact -free sliding of stair on the horizontal transverse, can effectively release stress and the transverse displacement caused by earthquake, and sets up high -damping rubber bushing in the sleeve, can effectively absorb and dissipate energy when the earthquake, avoided the damage of the component because of rigid impact or constraint.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated component technology, specifically relating to an assembled prefabricated staircase. Background Technology

[0002] With the rapid development of industrialized construction, prefabricated buildings are widely used due to their advantages such as fast construction speed, low environmental pollution, and easy quality control. As an important vertical circulation component in buildings, the prefabrication of staircases is a key aspect.

[0003] Currently, traditional prefabricated staircases are typically manufactured as integral stair slabs in a factory, transported to the site, and then hoisted to connect the upper and lower building structures. A common connection method involves embedding steel plates at both ends of the stair slabs, which are then welded or bolted to pre-embedded components in the building structure. However, this connection method has the following drawbacks: rigid connections lack buffering and micro-deformation capacity when subjected to dynamic loads (such as earthquakes), easily leading to stress concentration at the connection point, resulting in concrete cracking or damage to the connectors.

[0004] Therefore, there is an urgent need for a prefabricated staircase that is easy to install, has strong fault tolerance, reliable connection, and a certain degree of deformation adaptability. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a prefabricated staircase with reliable connection and effective ability to adapt to structural deformation and absorb vibration energy.

[0006] The technical solution adopted in this utility model is: A prefabricated staircase includes a staircase body, a horizontal sliding hinge support disposed between the upper connecting end of the staircase body and the upper platform beam, and a fixed hinge support disposed between the lower connecting end of the staircase body and the lower platform beam.

[0007] Furthermore, the horizontal sliding hinge support includes, from bottom to top, a support base plate, a sliding plate, an upper pad plate, an ear plate A disposed on the outer side of the top surface of the upper pad plate, and a sleeve disposed on the upper side of the stair body. The sleeve is connected to the ear plate A by a pin. The support base plate is fixedly disposed on the upper platform beam, the sliding plate is fixedly disposed on the surface of the support base plate, and baffles are provided on both sides of the stair body width direction on the support base plate. The upper pad plate is located between the two baffles.

[0008] Furthermore, the skateboard is made of polytetrafluoroethylene sheet, which is bonded to the base plate of the support, and the upper pad is made of steel plate, the lower surface of which is in sliding contact with the skateboard.

[0009] Furthermore, the baffle is horizontally positioned and perpendicular to the width direction of the staircase body, and it cooperates with both sides of the upper pad to achieve a limiting action.

[0010] Furthermore, a limiting strip is provided on the top of the inner side of the baffle, and a limiting groove that matches the limiting strip is provided on the top of the side of the upper pad.

[0011] Furthermore, the sleeve is horizontally positioned and parallel to the width direction of the staircase body.

[0012] Furthermore, the fixed hinge support includes an ear plate B fixedly mounted on the side of the lower platform beam, a sleeve mounted on the side of the lower connecting end of the stair body, and a pin passing through the ear plate B and the sleeve.

[0013] Furthermore, a corresponding fixing plate is provided on the side of the lower end of the staircase body corresponding to the lower platform beam, and the ear plate B and the corresponding sleeve are fixedly installed on the corresponding fixing plate.

[0014] Furthermore, a high-damping rubber bushing is embedded inside the sleeve, and the pin is located inside the high-damping rubber bushing.

[0015] Furthermore, the gap between the connecting end of the staircase body and the upper platform beam is filled with elastic fireproof sealant.

[0016] Furthermore, the gap between the lower connecting end of the staircase body and the lower platform beam is filled with elastic fireproof sealant.

[0017] The positive effects of this utility model are: The staircase body of this utility model is provided with a sliding plate, an upper pad, and a baffle between the upper connecting end and the upper platform beam, which realizes smooth and impact-free sliding of the staircase in the horizontal direction. It can effectively release stress and lateral displacement caused by earthquakes. In addition, a high-damping rubber bushing is set in the sleeve, which can effectively absorb and dissipate energy during earthquakes and avoid damage to the components caused by hard impacts or constraints. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the horizontal sliding hinge support of this utility model; Figure 4 This utility model Figure 1 Enlarged view of section B in the middle. Detailed Implementation

[0019] As attached Figure 1-4As shown, this utility model discloses an assembled prefabricated staircase, including a staircase body 1, a horizontal sliding hinge support disposed between the upper connecting end of the staircase body 1 and the upper platform beam 2, and a fixed hinge support disposed between the lower connecting end of the staircase body 1 and the lower platform beam 3.

[0020] Specifically, the horizontal sliding hinge support includes a support base plate 4 prefabricated on the surface of the upper platform beam 2, a sliding plate 5 fixedly attached to the support base plate 4 by adhesive bonding, and an upper pad 6 slidably mounted on the sliding plate 5. An ear plate A8 is provided on the outer end of the upper pad 6. A sleeve 10 is provided on the lower side of the connecting end of the stair body 1, located between the two ear plates A8, and connected by a pin 11. Two transverse baffles 7 are provided on the support base plate 4, located on both sides of the upper pad 6 along the width direction of the stair body 1. Under the action of the baffles 7, the upper pad 6 can only slide along... Figure 2 Lateral movement can efficiently release stress and seismic displacement, fundamentally avoiding crushing damage.

[0021] Furthermore, a limiting strip 17 is provided on the top inner side of the baffle 7, and a limiting groove 18 that matches the limiting strip 17 is provided on the top side of the upper pad 6. The bottom of the limiting strip 17 engages with the bottom of the limiting groove 18 to prevent the top of the staircase body 1 from being thrown upwards due to earthquakes or other reasons.

[0022] The skateboard 5 is made of a low-friction material, such as polytetrafluoroethylene (PTFE) sheet, which can be directly glued to the support base plate 4. The upper pad 6 is a steel plate, and its lower surface slides in contact with the skateboard 5.

[0023] Preferably, an installation plate is pre-embedded in the side wall of the connecting end on the stair body 1, and the sleeve 10 is welded to the installation plate. The sleeve 10 is set along the width direction of the stair body 1, so that the stair body 1 can rotate with the pin 11 as the pivot. Furthermore, a high-damping rubber bushing is provided inside the sleeve 10, which allows rotation during an earthquake and actively dissipates a large amount of seismic energy through the flexible deformation of the rubber, rather than converting energy into destructive stress as in traditional rigid joints. The entire sliding and rotation process is completed under the buffer of the low-friction sliding plate and the flexible bushing, avoiding the hard impact between the bolt and the hole wall in traditional elongated hole connections, thus protecting the joint itself and the connecting structure.

[0024] As attached Figure 4 As shown, the fixed hinge support includes an ear plate B13 fixedly mounted on the side of the lower platform beam 3, a sleeve 10 mounted on the side of the lower connecting end of the stair body 1, and a pin 11 passing between the ear plate B13 and the sleeve 10. Furthermore, a corresponding fixing plate 12 is provided on the lower end of the stair body 1 on the side corresponding to the lower platform beam 3, and the ear plate B13 and the corresponding sleeve 10 are fixedly mounted on the corresponding fixing plate 12.

[0025] Elastic fireproof sealant 9 is filled in the gaps between the upper and lower connecting ends of the stair body 1 and the corresponding upper and lower platform beams.

[0026] The combination of the upper pad 6 and the sliding plate 5 in this invention is responsible for releasing lateral displacement, ensuring smooth sliding. Compared with the traditional elongated hole connection method, there is no starting friction, completely eliminating the risk of compression damage caused by temperature stress and seismic displacement. The cooperation between the pin and the high-damping rubber bushing allows rotation and absorbs energy, dissipating energy through the flexible deformation of the rubber, avoiding hard impacts and stress concentration inside the joint.

[0027] The fixed hinge support and the horizontal sliding hinge support together form a stable and statically determinate force system. The fixed hinge support restricts the displacement of the lower connecting end of the staircase body 1 in all directions, allowing only rotation about the pin. Combined with the horizontal sliding hinge support, which allows lateral movement and rotation, the force model of the staircase is simplified to a classic simply supported beam. This makes the force path of the staircase clear and calculable: the vertical load is shared at both ends, while the horizontal load is transmitted through the lower fixed hinge support and the upper pin. The fixed hinge support can transfer the horizontal thrust or tension from the staircase to the lower platform beam 3, achieving seismic safety.

[0028] Meanwhile, the upper and lower ends of the staircase body 1 can be separated from the corresponding platform beam by removing the pins, making the joints inspectable and repairable. When the performance of the slide plate 5 and the high-damping rubber bushing 14 degrades, they can be replaced by removing the pins 11 to restore the joint performance at low cost.

[0029] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A prefabricated, assembled staircase, characterized in that... It includes a stair body (1), a horizontal sliding hinge support set between the upper connecting end of the stair body (1) and the upper platform beam (2), and a fixed hinge support set between the lower connecting end of the stair body (1) and the lower platform beam (3). The horizontal sliding hinge support includes, from bottom to top, a support base plate (4), a sliding plate (5), an upper pad plate (6), an ear plate A (8) set on the outer side of the top surface of the upper pad plate (6), and a sleeve (10) set on the upper side of the stair body (1). The sleeve (10) is connected to the ear plate A (8) by a pin (11). The support base plate (4) is fixedly set on the upper platform beam (2), the sliding plate (5) is fixedly set on the surface of the support base plate (4), and baffles (7) are provided on both sides of the width direction of the stair body (1) on the support base plate (4). The upper pad plate (6) is located between the two baffles (7).

2. The prefabricated staircase according to claim 1, characterized in that... The slide plate (5) is made of polytetrafluoroethylene and is bonded to the support base plate (4). The upper pad plate (6) is made of steel plate and its lower surface is in sliding contact with the slide plate (5).

3. A prefabricated staircase according to claim 1, characterized in that... The baffle (7) is horizontally set and perpendicular to the width direction of the stair body (1), and cooperates with the two sides of the upper pad (6) to achieve limiting.

4. A prefabricated staircase according to claim 1 or 3, characterized in that... A limiting strip (17) is provided on the top of the inner side of the baffle (7), and a limiting groove (18) adapted to the limiting strip (17) is provided on the top of the side of the upper pad (6).

5. A prefabricated staircase according to claim 1, characterized in that... The sleeve (10) is set horizontally and is parallel to the width direction of the stair body (1).

6. A prefabricated staircase according to claim 1, characterized in that... The fixed hinge support includes an ear plate B (13) fixedly installed on the side of the lower platform beam (3), a sleeve (10) installed on the side of the lower connecting end of the stair body (1), and a pin (11) passing between the ear plate B (13) and the sleeve (10).

7. A prefabricated staircase according to claim 6, characterized in that... A fixed plate (12) with a corresponding position is provided on the side of the lower end of the stair body (1) corresponding to the lower platform beam (3), and the ear plate B (13) and the corresponding sleeve (10) are fixedly installed on the corresponding fixed plate (12).

8. A prefabricated staircase according to claim 1 or 6, characterized in that... A high-damping rubber bushing (14) is embedded inside the sleeve (10), and a pin (11) is set inside the high-damping rubber bushing (14).

9. A prefabricated staircase according to claim 1, characterized in that... Elastic fireproof sealant (9) is filled in the gap between the connecting end of the stair body (1) and the upper platform beam (2).

10. A prefabricated staircase according to claim 6, characterized in that... Elastic fireproof sealant (9) is filled in the gap between the lower connecting end of the stair body (1) and the lower platform beam (3).

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