Stair sliding support vertical limiting device

Abstract

The utility model relates to the technical field of building engineering discloses a vertical limiting device of stair sliding support, including lower mounting plate and upper mounting plate, the upper mounting plate bottom and lower mounting plate top all are provided with lug plate, long round hole is set up along its length direction on the lug plate, the upper mounting plate and lower mounting plate are connected through the limiting bolt of the long round hole in the through setting, the upper mounting plate and lower mounting plate are provided with anchor steel bar away from one end, the utility model, can carry out vertical limiting restraint to stair board, effectively prevent the problem of stair board warping, guarantee the security of use, save the cost simultaneously, be convenient for maintenance, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a vertical limiting device for a staircase sliding support. Background Technology

[0002] In current reinforced concrete frames, the common technical solution for stair design and construction is to cast the upper part of the stair slab to the stair beam in place, and then detach the lower part from the stair beam to form a sliding support. This avoids the formation of K-shaped supports, reduces the stiffness of the stairwell, and thus prevents the staircase from failing before the main structure. For example, existing sliding supports achieve the purpose of detaching the lower part of the stair slab from the stair beam and allowing it to slide by setting steel plates (with graphite powder filled between the steel plates), ethylene plates, plastic plates, etc., on the lower surface of the lower end of the stair slab and the upper surface of the stair beam or the cantilevered part of the stair beam.

[0003] However, the aforementioned existing technologies have several shortcomings. First, earthquakes involve both horizontal and vertical vibrations, while sliding supports only slide horizontally, failing to constrain the stair slab vertically. For example, in shaking table tests, the lower end of the stair slab, lacking constraint, may tilt upwards with the upper end as the fulcrum, failing to guarantee rapid and safe passage during earthquakes. Second, the graphite powder used between ethylene, plastic, and steel plates needs periodic replacement within the staircase's design lifespan. Replacement requires prying the stair slab with equipment, making subsequent maintenance difficult and cumbersome.

[0004] Therefore, there is an urgent need for a vertical limiting device for stair sliding supports that can guarantee horizontal sliding performance and effectively restrict vertical movement. Utility Model Content

[0005] The purpose of this utility model is to provide a vertical limiting device for a stair sliding support, which can vertically limit and constrain the stair slab, effectively preventing the stair slab from warping and ensuring safety during use; at the same time, it saves costs, is easy to maintain, and is highly practical.

[0006] The present invention adopts the following technical solution: A vertical limiting device for a stair sliding support includes a lower mounting plate and an upper mounting plate. The bottom of the upper mounting plate and the top of the lower mounting plate are provided with ear plates. An elongated hole is formed on the ear plate along its length. The upper mounting plate and the lower mounting plate are connected by limiting bolts passing through the elongated hole. An anchoring steel bars are provided at the far end of the upper mounting plate and the lower mounting plate.

[0007] Preferably, the upper mounting plate, the lower mounting plate, and the ear plate are all steel plates.

[0008] Preferably, the lower mounting plate and the upper mounting plate are provided with multiple ear plates at intervals.

[0009] Preferably, the ear plates on the lower mounting plate are arranged in groups, and a space is formed between the two ear plates in each group for the ear plates on the upper mounting plate to pass through.

[0010] Preferably, the anchoring steel bars on the upper mounting plate and the lower mounting plate are arranged in multiple sets at intervals along their length.

[0011] Preferably, the two anchoring steel bars in each group are spaced apart along the width direction of the corresponding upper mounting plate or lower mounting plate.

[0012] Preferably, the threads of the limiting bolt are only located at its end, and the rest is a round steel structure.

[0013] Preferably, the upper mounting plate is welded to the ear plate and the anchoring steel bar, and the lower mounting plate is welded to the ear plate and the anchoring steel bar.

[0014] Preferably, the length and width of the upper mounting plate and the lower mounting plate are matched with the length and width of the staircase, and the height is 6mm.

[0015] Preferably, the length of the ear plate matches the width of the staircase, with a height of 80mm and a width of 6mm.

[0016] Compared with the prior art, the beneficial effects of this utility model are: this utility model restricts the relative vertical displacement between the stair slab and the stair beam or the cantilevered part of the stair beam by using ear plates and limiting bolts, thereby improving the situation where the prior art cannot restrict vertical displacement, effectively restricting the upturning of the stair slab in the vertical direction, and ensuring safety during use.

[0017] Furthermore, by opening elongated holes in the ear plates and setting the limiting bolts that contact the elongated holes in the ear plates as round steel structures, the sliding performance of the stair treads in the horizontal direction can be improved, and the relative sliding performance between the stair treads and the stair beams or the protruding parts of the stair beams can be improved. At the same time, this utility model also saves the cost of graphite powder and other subsequent maintenance and replacement in the prior art of using steel plates, and also improves the convenience of subsequent inspection and maintenance. Attached Figure Description

[0018] Figure 1 This is a front view of the lower mounting plate in an embodiment of this application; Figure 2 for Figure 1 Side view; Figure 3 This is a front view of the upper mounting plate in an embodiment of this application; Figure 4 for Figure 3 Side view; Figure 5 This is a front view of the ear plate in an embodiment of this application; Figure 6 This is a diagram showing the state when the upper mounting plate and the lower mounting plate are connected according to an embodiment of this application; Figure 7 This is a schematic diagram of the structure during installation and use according to an embodiment of this application. Detailed Implementation

[0019] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments: like Figures 1 to 7 As shown, the vertical limiting device for a stair sliding support of this utility model includes a lower mounting plate 1 and an upper mounting plate 2. The length and width of the upper mounting plate 2 and the lower mounting plate 1 are matched with the length and width of the staircase, and the height is 6mm. Ear plates 3 are welded to the bottom of the upper mounting plate 2 and the top of the lower mounting plate 1. The length of the ear plates 3 is matched with the width of the staircase, the height is 80mm, and the width is 6mm. The upper mounting plate 2, the lower mounting plate 1, and the ear plates 3 are all made of steel plates to ensure their structural strength and service life. An elongated hole 4 is opened along the length of the ear plate 3. The upper mounting plate 2 and the lower mounting plate 1 are connected by limiting bolts 5 through the elongated hole 4. Anchor steel bars 6 are welded to the far end of the upper mounting plate 2 and the lower mounting plate 1 for binding with the reinforcement of the stair slab to fix the entire limiting device. Finally, concrete is poured.

[0020] Furthermore, in this embodiment, multiple ear plates 3 are spaced apart on both the lower mounting plate 1 and the upper mounting plate 2 to increase the number of connection points between the upper mounting plate 2 and the lower mounting plate 1, ensuring the connection strength between them. The ear plates 3 on the lower mounting plate 1 are arranged in groups, with a space between each group of two ear plates 3 for the ear plates 3 on the upper mounting plate 2 to pass through. This not only ensures the connection strength between the upper mounting plate 2 and the lower mounting plate 1, but also allows for quick alignment and connection between the upper mounting plate 2 and the lower mounting plate 1 by allowing the upper ear plates 3 to pass through the space between the two lower ear plates 3, improving operational convenience.

[0021] Furthermore, in this embodiment, the anchoring steel bars 6 on the upper mounting plate 2 and the lower mounting plate 1 are arranged in multiple sets at intervals along their length direction, and the two anchoring steel bars 6 in each set are arranged at intervals along the width direction of the corresponding upper mounting plate 2 or the corresponding lower mounting plate 1. This ensures that the installation points are evenly distributed on the upper mounting plate 2 and the lower mounting plate 1, guaranteeing the stability of the upper mounting plate 2 and the lower mounting plate 1 after installation.

[0022] In addition, in this embodiment, the threads of the limiting bolt 5 are only provided at its end, and the rest is a round steel structure; the round steel structure can reduce the friction between it and the elongated hole 4 and improve the sliding performance of the device in the horizontal direction.

[0023] In installation, the lower mounting plate 1 is placed on the upper surface of the reinforcing bars of the ladder beam or the cantilevered portion of the ladder beam. The bottom ear plates 3 of the upper mounting plate 2 are aligned with the spaces formed by each set of ear plates 3 on the lower mounting plate 1. Then, limiting bolts 5 are inserted into the elongated holes 4 of the ear plates 3 to complete the connection between the upper and lower mounting plates 1. Finally, the anchoring reinforcing bars 6 are tied accordingly, and concrete is poured. Compared with the prior art, the vertical limiting device of the sliding support of this invention has significantly improved performance. For example, during vibration, the ear plate 3 and limiting bolt 5 in the limiting device restrict the relative vertical displacement between the stair slab and the stair beam or the cantilevered part of the stair beam, thereby improving the situation where the existing technology cannot restrict vertical displacement and effectively limiting the upward tilting of the stair slab. In addition, the optimized setting of the limiting bolt 5 and the opening of the elongated hole 4 on the ear plate 3 can also improve the sliding performance in the horizontal direction and improve the relative sliding performance. At the same time, this utility model also saves the cost of graphite powder and other later maintenance and replacement in the existing technology that uses steel plates. The overall structure is simple, the structural stability is strong, and it can meet the design service life of the staircase. Since the weak part is set as the bolt, after the bolt is damaged in the earthquake, only the damaged bolt needs to be removed and replaced with a new bolt. This can be done without equipment, which also improves the convenience of subsequent inspection and maintenance.

Claims

1. A vertical limiting device for a staircase sliding support, characterized in that: It includes a lower mounting plate and an upper mounting plate. The bottom of the upper mounting plate and the top of the lower mounting plate are provided with ear plates. An elongated hole is opened on the ear plate along its length direction. The upper mounting plate and the lower mounting plate are connected by a limiting bolt through the elongated hole. An anchoring steel bar is provided at the far end of the upper mounting plate and the lower mounting plate.

2. The vertical limiting device for a staircase sliding support according to claim 1, characterized in that: The upper mounting plate, the lower mounting plate, and the ear plate are all made of steel plates.

3. The vertical limiting device for a staircase sliding support according to claim 1, characterized in that: The lower mounting plate and the upper mounting plate are each provided with multiple ear plates at intervals.

4. The vertical limiting device for a staircase sliding support according to claim 3, characterized in that: The ear plates on the lower mounting plate are arranged in groups, and a space is formed between the two ear plates in each group for the ear plates on the upper mounting plate to pass through.

5. The vertical limiting device for a staircase sliding support according to claim 1, characterized in that: The anchoring steel bars on the upper mounting plate and the lower mounting plate are all arranged in multiple sets at intervals along their length.

6. The vertical limiting device for a staircase sliding support according to claim 5, characterized in that: Each group of two anchoring steel bars is spaced apart along the width direction of the corresponding upper or lower mounting plate.

7. The vertical limiting device for a staircase sliding support according to claim 1, characterized in that: The threads of the limiting bolt are only located at its end, and the rest is a round steel structure.

8. The vertical limiting device for a staircase sliding support according to claim 1, characterized in that: The upper mounting plate is welded to the ear plate and the anchoring steel bar, and the lower mounting plate is welded to the ear plate and the anchoring steel bar.

9. The vertical limiting device for a staircase sliding support according to claim 1, characterized in that: The length and width of the upper mounting plate and the lower mounting plate are matched with the length and width of the staircase, and the height is 6mm.

10. The vertical limiting device for a staircase sliding support according to claim 1, characterized in that: The length of the ear plate matches the width of the staircase, with a height of 80mm and a width of 6mm.

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