Stair sliding support structure with lower groove

Abstract

The utility model belongs to the field of constructional engineering, and provides a stair sliding support structure with a lower groove, which comprises a stair beam and a stair inclined stair section, embedded lower grooves are formed in the top ends of the ladder beams, lower anchor plates are arranged at the top ends of the ladder beams, the lower anchor plates are matched with the top ends of the ladder beams, lower anchor bars are pre-buried in the ladder beams, and the lower anchor bars and the lower anchor plates are fixed; the bottom end of the inclined stair section protrudes downwards to form a lower flange, the lower flange is matched with the lower groove, an upper anchor plate is arranged at the bottom end of the inclined stair section, the upper anchor plate is matched with the bottom end of the inclined stair section, an upper anchor bar is embedded in the inclined stair section, and the upper anchor bar and the upper anchor plate are fixed; a sliding medium layer is laid on the lower anchor plate, and the upper anchor plate abuts against the sliding medium layer so that the lower flange can be embedded into the lower groove. When a special working condition occurs, due to the arrangement of the lower groove, the inclined stair section of the stair can be automatically reset under the action of gravity after sliding dislocation occurs. The structure is durable and safe; the construction is convenient; the use is reliable and the like.

Description

Technical Field

[0001] The utility model belongs to the field of construction engineering, and in particular relates to a staircase sliding support structure with a lower groove. Background Art

[0002] As an evacuation channel, the stairs play a very important role in the entire building structure. However, from the experience of previous earthquake damage, it is found that the stairs are severely damaged, which affects the evacuation of people on the floors, and turns the escape channel into a dangerous channel. Therefore, the stairs should have good seismic resistance and be able to play a role in safety protection and life channel during earthquakes. Therefore, the stairs are set as a ladder structure system, which can be independent of other main structures and reduce the adverse effects of the main structure on the stairs.

[0003] In order to improve the earthquake resistance of stairs, in the prior art, a sliding support is generally installed at the end of the inclined stair section so that the stairs can slide when vibrating, release the vibration force, protect the stairs, and prevent the escape route from being damaged.

[0004] However, the existing stair sliding support is a flat design, and the end of the stair inclined section is directly placed on the support plane. When encountering major earthquakes, strong vibrations and other working conditions, the stair support will suffer great loss. After the working condition ends, the stair inclined section and the ladder beam may be misaligned. The misaligned stair inclined section has a great safety hazard, especially when there are many people who need to pass on the high floors, the stair inclined section cannot automatically return to the initial position, resulting in the inability of people to pass safely, and even some people mistakenly go up the misaligned stair inclined section, which poses a great safety hazard. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a staircase sliding support structure with a lower groove, which can automatically reset when the inclined staircase section slides out of position.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a staircase sliding support structure with a lower groove, comprising a ladder beam and a staircase inclined ladder section;

[0007] The top of the ladder beam is provided with an embedded lower groove, the cross section of the lower groove is an isosceles trapezoidal structure, the upper base of the isosceles trapezoidal structure is longer than the lower base, the top of the ladder beam is provided with a lower anchor plate, the lower anchor plate is adapted to the top of the ladder beam, and a lower anchor bar is pre-embedded in the ladder beam, and the lower anchor bar is fixed to the lower anchor plate;

[0008] The bottom end of the inclined staircase section protrudes downward to form a lower flange, which is adapted to the lower groove. The bottom end of the inclined staircase section is provided with an upper anchor plate, which is adapted to the bottom end of the inclined staircase section. Upper anchor bars are pre-embedded in the inclined staircase section, and the upper anchor bars are fixed to the upper anchor plate;

[0009] A sliding medium layer is laid on the lower anchor plate, and the upper anchor plate abuts against the sliding medium layer so that the lower flange is embedded in the lower groove.

[0010] Preferably, the lower groove is centrally arranged on the ladder beam, and the lower flange is centrally arranged on the last step of the inclined staircase section.

[0011] Preferably, the thickness of the upper anchor plate and the lower anchor plate is ≥8 mm.

[0012] Preferably, the diameter of the upper anchor bar and the lower anchor bar is ≥8 mm.

[0013] Preferably, the edge distance c of the upper anchor bar and the lower anchor bar is ≥75 mm.

[0014] Preferably, the projection length L of the waist of the isosceles trapezoid structure on the horizontal plane is ≥ the product value of the limit value of the structural elastoplastic inter-story drift angle and the height of the staircase section.

[0015] Preferably, the angle between the waist of the isosceles trapezoid structure and the horizontal plane is α, and 30°≥α≥10°.

[0016] Preferably, both the lower groove and the lower flange are arranged longitudinally along the width direction of the inclined staircase section.

[0017] Preferably, the inclined staircase section is a precast staircase section or a cast-in-situ section.

[0018] Preferably, the sliding medium layer is a polytetrafluoroethylene plate or a steel plate.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] A staircase sliding support structure with a lower groove provided by the present utility model, when special working conditions occur, due to the setting of the lower groove, after the inclined staircase section slides and dislocates, it can automatically reset under the action of gravity. It has the advantages of durable and safe structure, convenient construction, reliable use, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic side view structure diagram of a staircase sliding support structure with a lower groove provided by an embodiment of the present utility model;

[0022] Figure 2The side view structural schematic diagram of the inclined staircase section of a staircase sliding support structure with a lower groove provided by an embodiment of the present utility model;

[0023] Figure 3 The side view structural schematic diagram of the ladder beam of a staircase sliding support structure with a lower groove provided by an embodiment of the present utility model;

[0024] Figure 4 The side view structural schematic diagram of the upper anchor bar and the upper anchor plate of a staircase sliding support structure with a lower groove provided by an embodiment of the present utility model;

[0025] Figure 5 The side view structural schematic diagram of the lower anchor bar and the lower anchor plate of a staircase sliding support structure with a lower groove provided by an embodiment of the present utility model;

[0026] Figure 6 The side view structural schematic diagram of the lower anchor bar of a staircase sliding support structure with a lower groove provided by an embodiment of the present utility model.

[0027] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0028] 1, ladder beam; 2, inclined staircase section; 3, lower groove; 4, lower flange; 5, sliding medium layer; 31, lower anchor bar; 32, upper anchor bar; 41, lower anchor plate; 42, upper anchor plate; 311, left notch; 312, right notch. Detailed implementation manners

[0029] The following further elaborates on the present utility model in conjunction with specific embodiments, so that those skilled in the art can understand the present utility model more clearly.

[0030] It should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" in the terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For those of ordinary skill in the art, the specific meanings of such terms in the present utility model can be understood according to specific situations.

[0031] Embodiment 1

[0032] See Figure 1 , a staircase sliding support structure with a lower groove, including a ladder beam 1 and an inclined staircase section 2. The ladder beam 1 is located below and mainly plays a supporting role, and the bottom end of the inclined staircase section 2 is placed above the top end of the ladder beam 1.

[0033] See Figure 3, an embedded lower groove 3 is provided at the top end of the ladder beam 1. The lower groove 3 is centrally arranged on the ladder beam 1. The cross-section of the lower groove 3 is an isosceles trapezoid structure, and the upper base of the isosceles trapezoid structure is longer than the lower base. A lower anchor plate 41 is provided at the top end of the ladder beam 1, and the lower anchor plate 41 is adapted to the top end of the ladder beam 1. For example, the lower anchor plate 41 includes a groove section and ladder beam sections arranged on both sides of the groove section. The groove section is adapted to the lower groove 3, and the groove section is fixedly attached to the inner wall of the lower groove 3, and the ladder beam sections are fixedly attached to the horizontal parts on both sides of the lower groove 3.

[0034] The lower anchor plate 41 can be pre-embedded at the top end of the ladder beam 1. To improve the connection stability between the lower anchor plate 41 and the ladder beam 1, lower anchor bars 31 are also pre-embedded in the ladder beam 1, and the lower anchor bars 31 are fixed to the lower anchor plate 41. For example, three lower anchor bars 31 are pre-embedded in the ladder beam 1. One of the lower anchor bars 31 is welded and fixed to the groove section of the lower anchor plate 41, and the other two lower anchor bars 31 are respectively welded and fixed to the ladder beam sections on both sides, effectively improving the connection stability between the lower anchor plate 41 and the ladder beam 1.

[0035] See Figure 2 , the inclined ladder section 2 of the staircase can be a precast staircase section or a cast-in-place section. A lower flange 4 protrudes downward at the bottom end of the inclined ladder section 2 of the staircase. The lower flange 4 is centrally arranged at the last step of the inclined ladder section 2 of the staircase, and the lower flange 4 is arranged longitudinally along the width direction of the inclined ladder section 2 of the staircase. The lower flange 4 is adapted to the lower groove 3, that is, the cross-section of the lower flange 4 is also an isosceles trapezoid structure. An upper anchor plate 42 is provided at the bottom end of the inclined ladder section 2 of the staircase, and the upper anchor plate 42 is adapted to the bottom end of the inclined ladder section 2 of the staircase. For example, the upper anchor plate 42 includes a flange section and inclined ladder sections arranged on both sides of the flange section. The flange section is adapted to the lower flange 4, and the flange section is fixedly attached to the bottom wall of the lower flange 4, and the inclined ladder sections are fixedly attached to the horizontal parts on both sides of the lower flange 4.

[0036] The upper anchor plate 42 can be pre-embedded at the bottom end of the inclined ladder section 2 of the staircase. To improve the connection stability between the upper anchor plate 42 and the inclined ladder section 2 of the staircase, upper anchor bars 32 are also pre-embedded in the inclined ladder section 2 of the staircase, and the upper anchor bars 32 are fixed to the upper anchor plate 42. For example, three upper anchor bars 32 are pre-embedded in the inclined ladder section 2 of the staircase. One of the upper anchor bars 32 is welded and fixed to the flange section of the upper anchor plate 42, and the other two upper anchor bars 32 are respectively welded and fixed to the inclined ladder sections on both sides, effectively improving the connection stability between the upper anchor plate 42 and the inclined ladder section 2 of the staircase.

[0037] A sliding medium layer 5 is laid on the lower anchor plate 41. Optionally, the sliding medium layer 5 is a polytetrafluoroethylene plate or a steel plate. The sliding medium layer 5 has the same shape as the lower anchor plate 41. For example, the sliding medium layer 5 includes a groove part and ladder beam parts arranged on both sides of the groove part. The groove part is adapted to the groove section of the lower anchor plate 41, and the groove part is fixedly attached to the inner wall of the groove section, and the ladder beam parts are fixedly attached to the ladder beam sections on both sides of the groove section.

[0038] The upper anchor plate 42 abuts against the sliding medium layer 5. For example, the bottom surface of the flange section of the upper anchor plate 42 fits with the surface of the groove part of the sliding medium layer 5, and the inclined ladder section of the upper anchor plate 42 fits with the ladder beam part of the sliding medium layer 5, so that the lower flange 4 is just embedded into the lower groove 3.

[0039] Based on the above structure, when a special working condition occurs, if the inclined ladder section 2 of the staircase shakes, the lower flange 4 can slide back and forth along the inner wall of the lower groove 3. Since the cross-section of the lower groove 3 is an isosceles trapezoid structure, and the upper base of this isosceles trapezoid structure is longer than the lower base, after the working condition ends, the lower flange 4 can automatically return to the initial position due to the action of gravity.

[0040] Among them, the setting of the upper anchor plate 42 can, on the one hand, reduce the friction between the inclined ladder section 2 of the staircase and the sliding medium layer 5. On the other hand, during the sliding process, the upper anchor plate 42 can play a protective role in the bottom part of the inclined ladder section 2 of the staircase, preventing the bottom part of the inclined ladder section 2 from being worn and ensuring its integrity. The setting of the lower anchor plate 41 can play a protective role in the top part of the ladder beam 1 during the sliding process, preventing the top part of the ladder beam 1 from being worn and ensuring its integrity.

[0041] In addition, when the lower flange 4 slides outwards along the inner wall of the lower groove 3, it needs to overcome a certain gravity, so that it can play a buffering effect on the inclined ladder section 2 of the staircase and reduce the vibration amplitude of the inclined ladder section 2 of the staircase.

[0042] See Figure 4-5 , in order to ensure the structural strength of the anchor plate and the anchor bar, in this embodiment, the thickness of the upper anchor plate 42 and the lower anchor plate 41 ≥ 8 mm. The diameter of the upper anchor bar 32 and the lower anchor bar 31 ≥ 8 mm. The edge distance c of the upper anchor bar 32 and the lower anchor bar 31 ≥ 75 mm.

[0043] The projected length L of the waist of the isosceles trapezoid structure on the horizontal plane ≥ the product value of the limit value of the elastic-plastic inter-story drift angle of the structure and the height of the ladder section, so that there is enough shaking space at the bottom of the inclined ladder section 2 of the staircase to prevent the lower flange 4 from completely sliding out of the lower groove 3.

[0044] That is to say, the longer the length of the waist of the isosceles trapezoid structure in the horizontal direction, the larger the shaking space of the lower flange 4, and it can automatically reset within this space.

[0045] Among them, the included angle between the waist of the isosceles trapezoid structure and the horizontal plane is α, and 30° ≥ α ≥ 10°. Specifically, when α is too large, the sliding resistance of the lower flange 4 in the lower groove 3 is too large, and it may even be unable to slide. When α is too small, the lower flange 4 may not be able to automatically reset to the initial position.

[0046] In summary, the construction method of the staircase sliding support structure provided in this embodiment can include the following process:

[0047] S1. The lower groove 3 is pre-cast integrally with the lower anchor bars 31, the lower anchor plate 41 and the ladder beam 1 according to the design, and after its curing reaches the design strength;

[0048] S2. Lay the sliding medium layer 5 on the surface of the lower anchor plate 41;

[0049] S3. The precast inclined ladder section 2 of the staircase is installed in place by means of snap-fastening through the cooperation of the lower flange 4 and the lower groove 3, or the formwork and pouring work of the upper anchor bars 32, the upper anchor plate 42 and the inclined ladder section 2 of the staircase are carried out at the construction site, and it is okay after the curing is completed.

[0050] Embodiment 2

[0051] Refer to Figure 6 , on the basis of Embodiment 1, left notches 311 and right notches 312 are provided on the side wall of the lower anchor bar 31. The left notch 311 faces left, and the right notch 312 faces right. The settings of the left notch 311 and the right notch 312 can improve the connection stability between the lower anchor bar 31 and the ladder beam 1.

[0052] Among them, the left notches 311 and the right notches 312 are arranged alternately at intervals along the axial direction of the lower anchor bar 31, which can avoid significantly reducing the strength of the lower anchor bar 31 and causing weak parts with smaller dimensions to appear on the lower anchor bar 31.

[0053] In this embodiment, the upper anchor bar 32 can have the same structure as the lower anchor bar 31, which can improve the connection stability between the upper anchor bar 32 and the inclined ladder section 2 of the staircase.

[0054] The mechanisms, components and parts not described in detail in the present utility model are all existing structures that already exist in the prior art and can be directly purchased from the market.

[0055] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0056] The above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A staircase sliding support structure with a lower groove, characterized in that: It comprises a ladder beam (1) and a staircase inclined flight (2); The top of the ladder beam (1) is provided with an embedded lower groove (3), the cross section of the lower groove (3) is an isosceles trapezoidal structure, the upper base of the isosceles trapezoidal structure is longer than the lower base, the top of the ladder beam (1) is provided with a lower anchor plate (41), the lower anchor plate (41) is adapted to the top of the ladder beam (1), a lower anchor bar (31) is pre-buried in the ladder beam (1), and the lower anchor bar (31) is fixed to the lower anchor plate (41); The bottom end of the staircase inclined section (2) protrudes downward to form a lower flange (4), the lower flange (4) is matched with the lower groove (3), the bottom end of the staircase inclined section (2) is provided with an upper anchor plate (42), the upper anchor plate (42) is matched with the bottom end of the staircase inclined section (2), an upper anchor bar (32) is pre-buried in the staircase inclined section (2), and the upper anchor bar (32) is fixed to the upper anchor plate (42); A sliding medium layer (5) is laid on the lower anchor plate (41), and the upper anchor plate (42) abuts against the sliding medium layer (5) so that the lower flange (4) is embedded in the lower groove (3).

2. A staircase sliding support structure with a lower groove according to claim 1, characterized in that: The lower groove (3) is centrally arranged on the ladder beam (1), and the lower flange (4) is centrally arranged at the end step of the inclined staircase (2).

3. A staircase sliding support structure with a lower groove according to claim 1, characterized in that: The thickness of the upper anchor plate (42) and the lower anchor plate (41) is ≥8 mm.

4. A staircase sliding support structure with a lower groove according to claim 1, characterized in that: The diameters of the upper anchor bar (32) and the lower anchor bar (31) are ≥8 mm.

5. The staircase sliding support structure with a lower groove according to claim 1, characterized in that: The margin distance c of the upper anchor bar (32) and the lower anchor bar (31) is ≥75 mm.

6. A staircase sliding support structure with a lower groove according to claim 1, characterized in that: The projection length L of the waist of the isosceles trapezoidal structure on the horizontal plane is ≥ the product of the structural elastic-plastic inter-story displacement angle limit and the height of the ladder section.

7. The staircase sliding support structure with a lower groove according to claim 1, characterized in that: The angle between the waist of the isosceles trapezoidal structure and the horizontal plane is α, and 30°≥α≥10°.

8. The staircase sliding support structure with a lower groove according to claim 1, characterized in that: The lower groove (3) and the lower flange (4) are both arranged along the width direction of the inclined staircase (2).

9. The staircase sliding support structure with a lower groove according to claim 1, characterized in that: The inclined staircase flight (2) is a prefabricated staircase flight or a cast-in-place flight.

10. A staircase sliding support structure with a lower groove according to claim 1, characterized in that: The sliding medium layer (5) is a polytetrafluoroethylene plate or a steel plate.

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