Easily-installed structure of prefabricated stair

Abstract

The utility model discloses an easy-to-install structure of a prefabricated stair. The prefabricated stair comprises an upper frame steel bar part, a lower frame steel bar part, a connecting steel bar part, a force transmission steel bar part, a plurality of groups of step steel bar parts and prefabricated steps. The step part on the prefabricated stair is used as an independent part and is not integrally poured any more, the right-angle part of the step rib part connected with the prefabricated step is exposed during pouring, the first opening part of the step rib part is fixedly connected with the connecting steel bar part, and the first opening part and the connecting steel bar part are integrally poured and fixed, so that a main body of the prefabricated stair is formed, and transportation and hoisting are facilitated; and after the main body is hoisted, the prefabricated steps are installed one by one.

Description

Technical Field

[0001] The utility model relates to the technical field of building precast components, and particularly relates to an easy-installation structure of a precast staircase. Background Art

[0002] An assembled building is a new type of building method. It produces some or all components of the building in a component prefabrication factory, transports them to the construction site through corresponding transportation methods, and assembles the components into a building with usable functions by using reliable installation methods and installation machinery. Compared with the traditional construction mode of building main bodies and interior decoration, assembly helps the construction party standardize product quality, shorten the delivery cycle, reduce product energy consumption, reduce environmental pollution, and control construction costs, becoming the mainstream of the development of the building decoration industry.

[0003] Precast staircases are widely used due to advantages such as good appearance forming effect, no need for secondary plastering decoration, and simple and efficient construction. The load of the precast staircase is borne by a cast-in-place staircase cross beam, and anchoring steel bars are embedded in the cast-in-place staircase cross beam. During construction, the precast staircase is hoisted to the staircase by a lifting device for installation, and the anchoring holes provided on the precast staircase are anchored and connected with the anchoring steel bars embedded in the cast-in-place staircase cross beam. However, the existing precast staircases have the following problems:

[0004] 1. As a stress point, the anchoring hole of the precast staircase lacks a structural design to improve the connection strength. 2. The precast staircase is poured together with the connected steps, which not only increases the volume and weight, making it difficult to transport and hoist, but also the steps are vulnerable parts for stepping, and the integral structure results in that replacement, maintenance, etc. can only be carried out together with the precast staircase, increasing the cost. 3. Anti-slip grooves are provided at the existing steps to increase friction and prevent pedestrians from slipping, but the grooves are retained with rainwater from the soles of shoes and rain gear residues on rainy days and are not easy to clean.

[0005] Therefore, in view of the above problems, the structure of the precast staircase is improved and designed. Content of the Utility Model

[0006] In order to solve the above technical deficiencies, the utility model provides an easy-installation structure of a precast staircase.

[0007] The technical solution of the utility model is as follows: an easy-to-install structure of a prefabricated staircase, the prefabricated staircase comprises an upper frame steel bar portion, a lower frame steel bar portion, a connecting steel bar portion, a force transmission steel bar portion, and a plurality of step steel bar portions, and a prefabricated step. The connecting steel bar portion is inclinedly arranged in a parallelogram shape, and its head and tail ends are respectively connected and fixed with the upper frame steel bar portion and the lower frame steel bar portion. The plurality of step steel bar portions are L-shaped structures, including a first opening portion and a right-angle portion, the first opening portion is fixedly connected with the connecting steel bar portion, and the plurality of step steel bar portions are fixed on the connecting steel bar portion in a step-like shape in sequence. The force transmission steel bar is U-shaped structure, including a second opening portion and a round bottom portion. The upper frame steel bar portion and the lower frame steel bar portion are both parallelly provided with force transmission steel bar portions, and their second opening portions are all extended toward the connecting steel bar portion for fixed connection. Concrete is poured to cover the upper frame steel bar portion, the lower frame steel bar portion, the connecting steel bar portion, the force transmission steel bar portion, and the first opening portion to form a prefabricated staircase, and the right-angle portions of the plurality of step steel bar portions are all exposed outside the concrete.

[0008] The plurality of groups of prefabricated steps are detachably fixedly connected to each right-angle portion, and anchor holes are reserved on the concrete and the upper frame steel bar portion and the lower frame steel bar portion. The anchor holes are concentrically arranged with the circular bottom and pass through the circular bottom.

[0009] The utility model is further configured as follows: the prefabricated steps include a steel frame of a triangular prism structure, and concrete is poured to cover the steel frame to form the prefabricated steps. The prefabricated steps include a treading end face, an installation bevel that fits the prefabricated stairs, an outer end face, and two side end faces in the width direction. The treading end face is provided with an anti-slip groove, and the installation bevel is provided with an installation groove corresponding to the position and contour of the right angle portion. The two side end faces are provided with installation holes that pass through the right angle portion, and bolts are provided in the installation holes to connect and fix the right angle portion.

[0010] Further configuration of the utility model: the anti-slip groove is inclined in the vertical direction, including a high point end and a low point end. The prefabricated step also includes a drainage groove, which passes through the tread end face and the outer end face and is connected to the low point end. The drainage grooves of adjacent prefabricated steps are connected to each other end to end.

[0011] The utility model is further configured as follows: the cast-in-place staircase crossbeam is provided with a groove spliced with the upper frame steel bar portion or the lower frame steel bar portion, and a buffer pad is provided between the groove and the upper frame steel bar portion or the lower frame steel bar portion.

[0012] The beneficial effects of the utility model are as follows: the step portion on the prefabricated staircase is made into an independent component, which is no longer cast as a whole. Instead, the right-angle portion of the step reinforcement portion connected to the prefabricated step is exposed during casting, and the first opening portion is connected and fixed to the connecting steel bar portion (usually by binding, welding, etc.), and the first opening portion and the connecting steel bar portion are cast and fixed as a whole to form the main body of the prefabricated staircase, which is convenient for transportation and lifting.

[0013] Since the precast steps are small in size and light in weight, they can be independently produced and transported, or cast on site. After the hoisting of the precast staircase main body is completed, they are installed one by one. Through the installation grooves on the precast steps that are adapted to the right-angle parts, they are spliced and fitted. The right-angle parts simultaneously provide support force and limit for the precast steps. Then, installation holes are arranged on both end faces in the width direction for bolts to pass through and engage with the right-angle parts or be connected by screw holes to complete the assembly, enabling the steps to be disassembled and reassembled, which is convenient for maintenance.

[0014] The force-transferring steel bars are set as the extension arms of the connecting steel bar parts and are concentrically arranged with the anchoring holes as shown in the figure, so as to be sleeved with the pre-buried anchoring steel bars, forming a force-transferring structure between the anchoring steel bars and the connecting steel bar parts, reducing the stress on the upper frame steel bar part or the lower frame steel bar part, and improving the stability of the precast staircase after installation.

[0015] Through the structural improvement of the anti-slip grooves, one side is high and the other side is low. The water intercepted by the anti-slip grooves flows into the drainage grooves on the low side. Through the connection of the drainage grooves of each step, it is guided to the cast-in-place staircase cross beam for unified cleaning.

[0016] The buffer cushion layer arranged between the cast-in-place staircase cross beam and the upper frame steel bar part or the lower frame steel bar part reduces the impact force during installation, avoids collision damage, and provides the function of expansion joint after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the structure of the embodiment of the present utility model Figure 1 ;

[0018] Figure 2 is the structure of the embodiment of the present utility model Figure 2 ;

[0019] Figure 3 is the structure of the embodiment of the present utility model Figure 3 ;

[0020] Figure 4 is the structure of the embodiment of the present utility model Figure 4 ;

[0021] Figure 5 is the structure of the embodiment of the present utility model Figure 5 ;

[0022] The reference numerals in the drawings are respectively: 1 - upper frame steel bar part, 2 - lower frame steel bar part, 21 - anchoring hole, 3 - connecting steel bar part, 4 - force - transmitting steel bar part, 41 - round bottom, 5 - step rib part, 51 - right - angle part, 6 - precast step, 61 - stepping end face, 611 - anti - slip groove, 612 - drainage groove, 62 - outer end face, 63 - installation groove, 64 - installation hole, 7 - cast - in - place stair cross - beam, 71 - groove, 72 - buffer cushion layer, 73 - anchoring steel bar.

[0023] To better illustrate this embodiment, some components in the drawings are omitted, enlarged or reduced, which does not represent the size of the actual product. In addition, the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. Detailed implementation manners

[0024] To make the technical solutions and their advantages of this application clearer, the technical solutions of this application will be further described clearly and completely below with reference to the drawings. It can be understood that the specific embodiments described here are only partial embodiments of this application, which are only used to explain this application rather than limit this application. It should be noted that for the convenience of description, only the parts related to this application are shown in the drawings, and other related parts can refer to the general design. Without conflict, the embodiments and the technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0025] The following will introduce the present utility model in detail with reference to the drawings, as Figures 1-5 shown

[0026] An easy - installation structure of a precast stair, the precast stair includes an upper frame steel bar part 1, a lower frame steel bar part 2, a connecting steel bar part 3, a force - transmitting steel bar part 4, and several groups of step rib parts 5, precast steps 6. The connecting steel bar part 3 is arranged obliquely in a parallelogram shape, and its head and tail ends are respectively connected and fixed to the upper frame steel bar part 1 and the lower frame steel bar part 2. The several groups of step rib parts 5 are in an L - shaped structure, including a first opening part and a right - angle part 51. The first opening part is fixedly connected to the connecting steel bar part 3, and the several groups of step rib parts 5 are fixedly arranged on the connecting steel bar part 3 in a stepped manner in sequence. The force - transmitting steel bar part 4 is in a U - shaped structure, including a second opening part and a round bottom 41. The force - transmitting steel bar parts 4 are arranged in parallel in both the upper frame steel bar part 1 and the lower frame steel bar part 2, and their second opening parts extend towards the connecting steel bar part 3 for fixed connection. Concrete is poured to cover the upper frame steel bar part 1, the lower frame steel bar part 2, the connecting steel bar part 3, the force - transmitting steel bar part 4, and the first opening part to form the precast stair, and the right - angle parts 51 of the several step rib parts 5 are all exposed outside the concrete;

[0027] The several groups of precast steps 6 are detachably and fixedly connected to each right-angle part 51. Anchoring holes 21 are left on the upper frame steel bar part 1 and the lower frame steel bar part 2 of the concrete. The anchoring holes 21 are concentric with the round bottom part 41 and pass through the round bottom part 41.

[0028] The precast step 6 includes a steel bar framework with a triangular prism structure. The steel bar framework is coated with concrete to form the precast step 6. The precast step 6 includes a stepping end face 61, an installation inclined face that fits the precast staircase, an outer end face 62, and both end faces in the width direction. The stepping end face 61 is provided with anti-slip grooves 611. The installation inclined face is provided with installation grooves 63 corresponding to the position and contour of the right-angle part 51. Both end faces in the width direction are provided with installation holes 64 passing through the right-angle part 51. Bolts are arranged in the installation holes 64 to be connected and fixed to the right-angle part 51.

[0029] A further setting of the present utility model: The anti-slip grooves 611 are inclined in the vertical direction and include a high-point end part and a low-point end part. The precast step 6 further includes a drainage groove 612. The drainage groove 612 passes through the stepping end face 61 and the outer end face 62 and communicates with the low-point end part. The drainage grooves 612 of adjacent precast steps 6 are connected end to end and communicate with each other.

[0030] The cast-in-place staircase cross beam 7 is provided with a groove 71 spliced with the upper frame steel bar part 1 or the lower frame steel bar part 2. A buffer cushion layer 72 is arranged between the groove 71 and the upper frame steel bar part 1 or the lower frame steel bar part 2.

[0031] By making the step part on the precast staircase an independent component, instead of integrally casting, the right-angle part 51 of the step reinforcement part 5 connected to the precast step 6 is exposed during casting. Its first opening part is connected and fixed to the connecting reinforcement part 3 (usually by tying, welding, etc.), and the first opening part and the connecting reinforcement part 3 are integrally cast and fixed to form the main body of the precast staircase, which is convenient for transportation and hoisting.

[0032] The precast step 6 is small in volume and light in weight, and can be independently produced and transported, or cast on site. After the main body of the precast staircase is hoisted, the installation is carried out one by one. Through the installation groove 63 on the precast step 6 adapted to the right-angle part 51, the splicing is made to fit. The right-angle part 51 provides support force and limit for the precast step 6 at the same time. Then, installation holes 64 are arranged on both end faces in the width direction for bolts to pass through and be engaged with or screwed to the right-angle part 51 to complete the assembly, so that the steps can be disassembled and reassembled, which is convenient for maintenance.

[0033] The force-transferring steel bars are provided as the extension arms connecting to the reinforcing bar portion 3, and are concentrically arranged with the anchoring holes 21 as shown in the figure, so as to be sleeved with the embedded anchoring steel bars 73, forming a force-transferring structure between the anchoring steel bars 73 and the connecting reinforcing bar portion 3, reducing the stress on the upper frame reinforcing bar portion 1 or the lower frame reinforcing bar portion 2, and improving the stability after the precast staircase is installed.

[0034] Through the structural improvement of the anti-slip groove 611, making one side higher and the other side lower, the water intercepted by the anti-slip groove 611 flows into the drainage groove 612 on the lower side. Through the connection of the drainage grooves 612 of each step, it is guided to the cast-in-place staircase cross beam 7 for unified cleaning.

[0035] A buffer cushion layer 72 is provided between the cast-in-place staircase cross beam 7 and the upper frame reinforcing bar portion 1 or the lower frame reinforcing bar portion 2, reducing the impact force during installation, avoiding collision damage, and providing the function of an expansion joint after the installation is completed.

[0036] It can be understood that for those skilled in the art, any equivalent replacement or change to the technical solution and the inventive concept of the present utility model should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An easy-to-install structure for precast stairs, characterized in that: The prefabricated stairs include an upper frame reinforcement portion, a lower frame reinforcement portion, a connecting reinforcement portion, a force transmission reinforcement portion, and a plurality of step reinforcement portions, and a prefabricated step. The connecting reinforcement portion is inclined in a parallelogram shape, and its head and tail ends are respectively connected and fixed to the upper frame reinforcement portion and the lower frame reinforcement portion. The plurality of step reinforcement portions are L-shaped structures, including a first opening portion and a right-angle portion. The first opening portion is fixedly connected to the connecting reinforcement portion, and the plurality of step reinforcement portions are fixed in steps on the connecting reinforcement portion in sequence. The force transmission reinforcement portion is U-shaped structure, including a second opening portion and a round bottom portion. The upper frame reinforcement part and the lower frame reinforcement part are both provided with force transmission reinforcement parts in parallel, and the second opening parts thereof are both extended toward the connecting reinforcement parts for fixed connection, and the upper frame reinforcement part, the lower frame reinforcement part, the connecting reinforcement part, the force transmission reinforcement part, and the first opening part are cast and covered with concrete to form a prefabricated staircase, and the right-angle parts of the reinforcement parts of the several steps are all exposed outside the concrete; the several groups of prefabricated steps are detachably fixedly connected with each right-angle part, and anchor holes are reserved on the concrete and the upper frame reinforcement part and the lower frame reinforcement part, and the anchor holes are concentrically arranged with the circular bottom part and pass through the circular bottom part.

2. The easy-to-install structure of a precast staircase according to claim 1, characterized in that: The prefabricated steps include a steel frame with a triangular prism structure, and concrete is poured to cover the steel frame to form the prefabricated steps. The prefabricated steps include a tread end face, an installation bevel that fits the prefabricated stairs, an outer end face, and two side end faces in the width direction. The tread end face is provided with an anti-slip groove, and the installation bevel is provided with an installation groove corresponding to the position and contour of the right angle part. The two side end faces are provided with installation holes that pass through the right angle part, and bolts are provided in the installation holes to connect and fix the right angle part.

3. The easy-installation structure of a precast staircase according to claim 2, characterized in that: The anti-slip groove is inclined in the vertical direction and includes a high point end and a low point end. The prefabricated step also includes a drainage groove, which passes through the tread end surface and the outer end surface and is connected to the low point end. The drainage grooves of adjacent prefabricated steps are connected to each other end to end.

4. The easy-to-install structure of a precast staircase according to claim 3, characterized in that: The cast-in-place staircase crossbeam is provided with a groove spliced with the upper frame steel bar portion or the lower frame steel bar portion, and a buffer cushion layer is provided between the groove and the upper frame steel bar portion or the lower frame steel bar portion.

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