Prefabricated stair

Abstract

The application provides a prefabricated stair, belonging to the field of fabricated buildings, wherein the prefabricated stair comprises two stair beams and a plurality of steps. One side of the stair beam in the plane is provided with a plurality of plug-in buckle groups for mounting the steps, each plug-in buckle group comprises at least two plug-in buckles, and the plurality of plug-in buckle groups on the two stair beams are arranged in correspondence with the same height. The step comprises at least a step body and a plug-in side edge, the two sides of the step body are provided with the plug-in side edges, a longitudinal limiting groove and a transverse limiting groove are arranged on the plug-in side edge, the longitudinal limiting groove and the transverse limiting groove are correspondingly arranged in the two plug-in buckles of the plug-in buckle group, and self-locking in the longitudinal direction and the transverse direction is formed. Therefore, on the basis of the fully fabricated structure, self-locking is formed by the plug-in buckles and the two limiting grooves without any additional operation, so that the sliding of the steps is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated buildings, and in particular relates to a prefabricated staircase. Background Technology

[0002] Existing precast steel staircase technology is quite mature. However, the connection between treads and stair beams is mainly achieved through factory welding, which is cumbersome in terms of positioning, has a low degree of standardization, is unsuitable for on-site connection, and welding affects corrosion resistance. How to improve the ease of connection between treads and stair beams and ultimately achieve standardization is a problem worthy of research.

[0003] Therefore, this utility model came into being.

[0004] It should be noted that the information disclosed in the background section of this utility model is intended only to enhance the understanding of the general background of this utility model, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to propose a prefabricated staircase that is factory-standard prefabricated and fully assembled on-site, in order to solve the problems of transportation and assembly.

[0006] Therefore, this utility model provides a prefabricated staircase, comprising: Two ladder beams, one side of which is provided with multiple snap-fit ​​groups for installing steps, each snap-fit ​​group including at least two snap-fits, and multiple snap-fit ​​groups on the two ladder beams are arranged at the same height. Multiple steps, each step including at least a step body and a connecting side, the connecting side being provided on both sides of the step body, the connecting side being provided with a longitudinal limiting groove and a transverse limiting groove, the longitudinal limiting groove and the transverse limiting groove having different depth directions, the longitudinal limiting groove and the transverse limiting groove being correspondingly inserted into the buckle of the buckle assembly to form longitudinal and transverse self-locking.

[0007] Preferably, the structure of the step body is Z-shaped, the step body includes a step plate and two kick plates, and the plug-in side is provided on both sides of the step plate; the step plate, the kick plates and the plug-in side are integrally formed or fixedly connected.

[0008] Preferably, the buckle includes at least one insert rod, the insert rod is fixed to the ladder beam, and the longitudinal limiting groove and the transverse limiting groove are correspondingly inserted into the insert rod of the buckle assembly to form longitudinal and transverse self-locking.

[0009] Preferably, the buckle further includes an anti-detachment cap, which is disposed on the plug rod and abuts against the plug side.

[0010] Preferably, the insertion rod is a screw rod, and the anti-loosening cap is an anti-loosening nut, which is threaded onto the screw rod and abuts against the insertion side.

[0011] Preferably, the out-of-plane side of the ladder beam is implemented as a flat side.

[0012] Preferably, it also includes a decorative panel, which is at least laid on the tread surface of the step body.

[0013] Preferably, the step has two mounting grooves on its plug-in side, and a pad is provided in the mounting groove; the longitudinal limiting groove and the transverse limiting groove are respectively provided in the pad in the two mounting grooves.

[0014] Preferably, the depth direction of the longitudinal limiting groove is a first direction, and the depth direction of the transverse limiting groove is a second direction; the first direction and the second direction are perpendicular to each other.

[0015] Preferably, the first direction is horizontal and the second direction is vertical.

[0016] The technical effects of the above-mentioned technical solution of this utility model are as follows: This application proposes a modular assembly of the ladder beams and steps. The ladder beams are pre-set with corresponding snap-fit ​​groups at the pre-set elevations to ensure precise matching of the step installation positions, eliminating the need for on-site measurement and positioning and reducing human error. The snap-fit ​​design of the side and snap-fit ​​allows for "installation upon hole alignment," reducing the installation time of a single component by more than 80%.

[0017] All components (stair beams, steps, and platform slabs) are connected by interlocking joints, eliminating the need for traditional cast-in-place concrete joints. The entire construction process is wet-free, shortening the construction period by more than 80%, and is not affected by the welding skills of the workers.

[0018] Steps can be formed by cutting and bending a single sheet of steel, or they can be integrally cast using UHPC, enabling automated production.

[0019] All components are plate structures, so standard components can be stacked and stored, greatly improving the efficiency of warehousing and transportation space.

[0020] The locking mechanism, employing longitudinal and transverse limiting grooves in conjunction with snap-fit ​​fasteners—a locking structure where the snap-fit ​​fasteners engage with the side of the connector—prevents the treads from dislodging, ensuring reliable vertical load transfer. This also facilitates future replacement of the treads, making maintenance much easier. Attached Figure Description

[0021] Figure 1 The diagram shows the structure of the prefabricated staircase.

[0022] Figure 2 This diagram illustrates the installation structure of the steel treads in a prefabricated staircase.

[0023] Figure 3 This diagram shows the installation location of the snap-fit ​​mechanism for the prefabricated staircase.

[0024] Figure 4 This image shows a magnified view of a prefabricated staircase's snap-fit ​​installation.

[0025] Figure 5 This is a schematic diagram illustrating the structure of a prefabricated staircase from another perspective.

[0026] Figure 6 This diagram illustrates the structure of the steel treads of a prefabricated staircase.

[0027] Figure 7 The diagram illustrates the structure of the longitudinal and transverse limiting grooves of the prefabricated staircase.

[0028] Figure 8 This diagram illustrates the installation of the snap-fit ​​mechanism and the longitudinal and transverse limiting grooves of the precast staircase.

[0029] Figure 9 This diagram illustrates the concrete tread structure of a precast staircase.

[0030] Figure 10 It expresses Figure 9 Enlarged view of the structure at point A in the middle.

[0031] Figure 11 This is a structural diagram illustrating another implementation of the snap-fit ​​mechanism in prefabricated stairs.

[0032] Figure 12 It expresses Figure 11 Enlarged view of the structure at point B.

[0033] Figure 13 This diagram illustrates the installation of a prefabricated staircase.

[0034] The components include: 1. Stair beam; 101. Top mounting node; 102. Bottom mounting node; 11. Stair section; 12. Platform section; 2. Step; 21. Step body; 211. Step plate; 212. Kickboard; 22. Insert side; 220. Lateral limiting groove; 221. Longitudinal limiting groove; 222. Mounting groove; 223. Pad; 3. Decorative panel; 4. Snap-on; 41. Insert rod; 41a. Screw; 42. Anti-loosening cap; 42a. Anti-loosening nut; 5. Reinforcing rib; 6. Platform plate. Detailed Implementation

[0035] The following description is provided to enable those skilled in the art to implement and use the present invention and to incorporate it into specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0036] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that practice of the present invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without being shown in detail to avoid obscuring the present invention.

[0037] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0038] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0042] Please see Figures 1-10 This embodiment provides a prefabricated staircase, including two stair beams 1 and multiple steps 2. Each stair beam 1 has multiple snap-fit ​​groups for installing the steps 2 on one side of its in-plane surface. Each snap-fit ​​group includes at least two snaps 4, and the multiple snap-fit ​​groups on the two stair beams 1 are arranged at equal heights. Specifically, the number of snap-fit ​​groups on each stair beam 1 corresponds to the number of steps 2, and their spacing also corresponds to the height of the steps 2, which is not limited here. Further, each step 2 includes at least a step body 21 and a connecting side 22. The step body 21 has connecting sides 22 on both sides. Each connecting side 22 has at least one longitudinal limiting groove 221 and at least one transverse limiting groove 220. The longitudinal limiting groove 221 and the transverse limiting groove 220 have different depth directions, and the longitudinal limiting groove 221 and the transverse limiting groove 220 are corresponding to the two snaps 4 inserted into the snap-fit ​​groups, forming longitudinal and transverse self-locking. Therefore, based on the fully assembled structure, without any additional operation, the buckle 4 and the two limiting slots can form a self-locking mechanism to prevent the step 2 from sliding.

[0043] The staircase comprises a beam 1, treads 2, and decorative panels 3. There are two beams 1, each with multiple snap-fit ​​assemblies for installing the treads 2 on one side of its inner surface. Each snap-fit ​​assembly includes at least two snaps 4. The elevation positions of these snap-fit ​​assemblies on the two beams 1 correspond one-to-one, meaning that opposite snap-fit ​​assemblies on the two beams 1 are at the same height. Each tread 2 includes at least a tread body 21 and snap-fit ​​sides 22. Snap-fit ​​sides 22 are located on both sides of the tread body 21. Furthermore, the tread body 21 has a Z-shaped structure, comprising a tread plate 211 and two kickboards 212. The snap-fit ​​sides 22 are located on both sides of the tread plate 211. The tread plate 211, kickboards 212, and snap-fit ​​sides 22 are integrally formed or fixedly connected.

[0044] Furthermore, step 2 can be a steel or concrete structure. In a preferred embodiment, the main body 21 of the step is a Z-shaped steel structure, comprising a step plate 211 and two skirting boards 212, with decorative panels 3 at least laid on the step plate 211. Step 2 can be formed by cutting and bending a single plate. Specifically, a rectangular plate can be bent in the opposite direction on its longer side to form a Z-shape, which constitutes the main body 21 of the step; the shorter side can be bent in the same direction to form a U-shape, with the bent portion forming the interlocking side 22. Alternatively, step 2 can be a monolithically cast concrete structure or a UHPC structure.

[0045] Multiple sets of snap fasteners are spaced apart on each ladder beam 1; the snap fastener sets on two ladder beams 1 correspond one-to-one according to the elevation, thus ensuring that the steps 2 are level in the horizontal direction. Each set of snap fasteners has at least two pieces, thus forming a better step support effect.

[0046] Specifically, the snap fastener 4 includes at least one insert rod 41, which is fixed to the ladder beam 1. A longitudinal limiting groove 221 and a transverse limiting groove 220 are correspondingly inserted into the two insert rods 41 of the snap fastener assembly, forming longitudinal and transverse self-locking. Furthermore, the snap fastener 4 also includes an anti-slip cap 42, which is located on the insert rod 41 and abuts against the insertion side 22. Because the insert rods 41 are located inside the ladder beam 1 and face each other, slippage is generally unlikely under the clamping of the two ladder beams 1. However, to improve stability, the anti-slip cap 42 is provided. The anti-slip cap 42 and the insert rod 41 form a circular snap structure, which can be welded to the ladder beam 1.

[0047] It should be noted that the round buckle structure is a preferred embodiment of the snap fastener 4, but not the only limitation. For another preferred embodiment of this invention, please refer to... Figure 11 and Figure 12 The insertion rod 41 is a screw 41a, and the anti-loosening cap 42 is an anti-loosening nut 42a. The anti-loosening nut 42a is threaded onto the screw 41a and abuts against the insertion side 22. After the longitudinal limiting groove 221 and the transverse limiting groove 220 are correspondingly inserted into the two screws 41a of the snap fastener assembly, they are locked by the anti-loosening nut 42a.

[0048] Please see Figure 13 A snap-fit ​​4 is provided on the inner side of the stair beam, while the outer side of the stair beam is made into a flat side, thus solving the problem that the side openings of the prefabricated staircase cannot fit the main building structure 7. Conventional prefabricated staircases fix the treads by bolting through the stair beam. This method requires the treads to be installed on the stair beam first before the entire staircase is installed, because if the stair beam is installed first, the wall on the side of the stair beam will prevent the bolts from being installed.

[0049] As another preferred embodiment of this invention, please refer to Figure 8 , Figure 9 and Figure 10 The step body 21 is self-locking in both the horizontal and vertical directions through the limiting grooves. Specifically, a longitudinal limiting groove 221 and a horizontal limiting groove 220 are provided on the insertion side 22, and the longitudinal limiting groove 221 and the horizontal limiting groove 220 are respectively inserted into the buckle 4.

[0050] The structure of the snap 4 is not limited and can be adopted. Figure 10 The shape of the round button in the image. Please refer to... Figure 9 and Figure 10 When installing the step body 21, first angle the step body 21 so that the longitudinal limiting groove 221 is aligned with one of the snap fasteners 4 in the snap fastener assembly. After insertion, insert the transverse limiting groove 220 downwards to align with the other snap fastener 4. In this embodiment, the use of bolts can be eliminated through the self-locking of the grooves.

[0051] When step 2 is a concrete structure, two mounting grooves 222 are provided on the insertion side 22 of step 2, and a pad 223 is provided in the mounting groove 222; the longitudinal limiting groove 221 and the transverse limiting groove 220 are respectively provided on the pad 223 in the two mounting grooves 222. Furthermore, the pad 223 is a steel pad, which can be embedded in step 2 by pre-embedded bars, and step 2 is a UHPC structure.

[0052] In a preferred embodiment of this invention, the depth direction of the longitudinal limiting groove 221 is the first direction, and the depth direction of the transverse limiting groove 220 is the second direction. The first direction and the second direction are not in the same direction. Essentially, their limiting directions do not overlap, thus achieving mutual constraint. The angle between the first and second directions is not a fixed limitation. Preferably, the first and second directions are perpendicular to each other; wherein the first direction is horizontal and the second direction is vertical. The ladder beam 1 is made entirely of a long plate, suitable for stacking. Structurally, the ladder beam 1 includes at least a ladder section 11 and a platform section 12. A reinforcing rib 5 connects the platform sections 12 of two ladder beams 1, and a platform plate 6 connects the two platform sections 12.

[0053] Similarly to the installation method of step 2, multiple snap-fit ​​assemblies are also provided on platform section 12, and the installation method of platform plate 6 is the same as that of step 2. Specifically, a platform insert plate is provided at the bottom of platform plate 6, and the platform insert plate is inserted into snap-fit ​​4. Similarly to step 2, the platform insert plate can also be formed by bending part of platform plate 6, improving efficiency and standardization. Furthermore, platform ribs are also provided at the bottom of platform plate 6 to enhance the bending resistance of platform plate 6.

[0054] Specifically, platform plate 6 is a rectangular plate. The relatively longer side of platform plate 6 is bent in the same direction to form a platform rib, with the bending direction downward. The relatively shorter side of platform plate 6 is bent in the same direction to form a platform insert for installation, with the bending direction downward.

[0055] For further details, please refer to Figure 5 The steps 2 and platform 6 provide a certain degree of connection stability between the two stair beams 1. To further improve reliability, in a preferred embodiment of this example, the platform segment 12 closer to the stair segment 11 is defined as the beginning end, and the segment farther from the stair segment 11 is defined as the end end. Reinforcing ribs 5 are connected between the beginning ends of the platform segments 12, and reinforcing ribs 5 are connected between the end ends of the platform segments 12; the platform 6 is located between the beginning and end ends of the platform segments 12.

[0056] Furthermore, at least one reinforcing rib 5 is located at the end of the platform section 12, and the bottom of the reinforcing rib 5 at the end of the platform section 12 is provided with a top mounting node 101, while the bottom of the stair section 11 is provided with a bottom mounting node 102. Preferably, there are two reinforcing ribs 5 at the end of the platform section 12, and the top mounting node 101 is provided on the lower reinforcing rib 5.

[0057] This embodiment also includes a decorative panel 3, which is at least laid on the tread 2 surface of the step body 21. The decorative panel 3, serving as decoration and protection, can be made of various materials such as plastic, ceramic, or glass. In a preferred embodiment, the decorative panel 3 is a decorative ceramic tile, which is adhered to the step body 21, specifically to the upper surface of the step body 21.

[0058] The beneficial effects of this embodiment: This application uses a modular assembly of the ladder beam 1 and the step 2. The ladder beam 1 has a pre-set buckle group corresponding to the elevation, which ensures that the installation position of the step 2 is accurately matched, eliminating the need for on-site measurement and positioning and reducing human error. The plug-in design of the plug-in side 22 and the buckle 4 enables "installation by matching the holes", which reduces the installation time of a single component by more than 80%.

[0059] All components (stair beam 1, step 2 and platform slab 6) are connected by plug-in joints, eliminating the need for traditional cast-in-place concrete joints. The entire construction process is wet-free, shortening the construction period by more than 80%, and is not affected by the welding skills of the workers.

[0060] Step 2 can be formed by cutting and bending a single piece of steel plate, or it can be integrally cast using UHPC, enabling automated production.

[0061] All components are plate structures, so the components can be stacked and stored, greatly improving the efficiency of storage and transportation space.

[0062] The locking mechanism of the step 2, achieved through the longitudinal limiting groove 221 and the transverse limiting groove 220 in conjunction with the snap fastener 4—the interlocking structure between the snap fastener 4 and the insertion side 22—prevents the step 2 from dislodging, ensuring reliable transmission of vertical loads. This also facilitates the later replacement of the step 211, making maintenance more convenient.

[0063] Furthermore, the present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A prefabricated staircase, characterized in that, include: Two ladder beams, one side of which is provided with multiple snap-fit ​​groups for installing steps, each snap-fit ​​group including at least two snap-fits, and multiple snap-fit ​​groups on the two ladder beams are arranged at the same height. Multiple steps, each step including at least a step body and a connecting side, the connecting side being provided on both sides of the step body, the connecting side being provided with a longitudinal limiting groove and a transverse limiting groove, the longitudinal limiting groove and the transverse limiting groove having different depth directions, the longitudinal limiting groove and the transverse limiting groove being correspondingly inserted into the buckle of the buckle assembly to form longitudinal and transverse self-locking.

2. The prefabricated staircase as described in claim 1, characterized in that: The main body of the step has a Z-shaped structure, and includes a step plate and two kick plates. The plug-in side is located on both sides of the step plate. The step plate, the kick plates and the plug-in side are integrally formed or fixedly connected.

3. The prefabricated staircase as described in claim 1, characterized in that: The buckle includes at least one insert rod, which is fixed to the ladder beam. The longitudinal limiting groove and the transverse limiting groove are correspondingly inserted into the insert rod of the buckle assembly to form longitudinal and transverse self-locking.

4. The prefabricated staircase as described in claim 3, characterized in that: The buckle also includes an anti-detachment cap, which is disposed on the plug rod and abuts against the plug side.

5. The prefabricated staircase as described in claim 4, characterized in that: The insertion rod is a screw rod, and the anti-loosening cap is an anti-loosening nut. The anti-loosening nut is threaded onto the screw rod and abuts against the insertion side.

6. The prefabricated staircase as described in claim 1, characterized in that: The outer side of the ladder beam is made into a flat side.

7. The prefabricated staircase as described in claim 1, characterized in that: It also includes a decorative panel, which is at least laid on the tread surface of the step body.

8. The prefabricated staircase as described in claim 1, characterized in that: The step has two mounting grooves on its plug-in side, and a pad is provided in the mounting groove; the longitudinal limiting groove and the transverse limiting groove are respectively provided in the pad in the two mounting grooves.

9. The prefabricated staircase as described in claim 1, characterized in that: The longitudinal limiting groove has a first direction in its depth direction, and the transverse limiting groove has a second direction in its depth direction; the first direction and the second direction are perpendicular to each other.

10. The prefabricated staircase as described in claim 9, characterized in that: The first direction is horizontal, and the second direction is vertical.

Images