Pedal height adjustable PC prefabricated stair horizontal mold

Abstract

The utility model relates to a horizontal mould for a PC prefabricated stair with adjustable step height, a stair beam comprises a beam web plate, the beam web plate is a steel plate cut according to the design external dimension of the stair, and the beam web plate is provided with beam bolt holes corresponding to each layer of step; the upper edge of the beam web is fixedly connected with an upper flange plate, and the lower edge is fixedly connected with a lower flange plate; each stepping module corresponds to one step, the stepping modules are sequentially arranged along the main body section, the two ends of each stepping module are fixedly connected with the main body section, and the stepping modules of the upper step and the lower step are fixedly connected; the upper platform module is arranged at the upper ends of the ladder beams; the lower side of the lower platform is further provided with a flange plugging plate, the outer side of the flange plugging plate is in sealed connection with the bottom face of the lower platform, and the two ends of the flange plugging plate are in sealed connection with the beam web plates.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and in particular relates to a PC prefabricated staircase horizontal mould with adjustable step height. Background Art

[0002] Existing prefabricated staircase molds are purchased and customized. They consist of ladder beams, platform plates, and tread panels. The ladder beams and tread panels are customized according to the design dimensions. One staircase, or stairs with identical design dimensions, corresponds to one mold. In actual construction, a building often has different staircase designs. Moreover, the specifications of the staircases also need to be adaptively adjusted according to the building structure. This fine-tuning is mainly reflected in the need to adapt the height of the treads, and the treads need to be reasonably distributed according to the ceiling height of the upper and lower floors.

[0003] Due to construction errors, staircase heights often vary between floors, requiring adjustments to the tread height. However, existing staircase molds use a fixed tread panel as a single rigid component, making this adjustment impossible. Existing technology typically requires replacing the tread panel, which requires welding multiple panels and takes a long time to manufacture. When staircase adjustments are needed on short notice and under tight deadlines, construction is often under significant pressure, making existing staircase molds inadequate.

[0004] This utility model patent can solve the above problems and can achieve: short production cycle, low mold cost, and meet the rush work progress requirements of emergency projects. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing staircase moulds cannot adjust the step height and the staircase production cost is high.

[0006] The utility model solves the above problems by adopting the following technical solutions:

[0007] A PC prefabricated horizontal staircase mold with adjustable step height, including ladder beams, upper platform modules, lower platform modules and step modules.

[0008] The stair beam includes a beam web, which is a steel plate cut according to the design dimensions of the staircase. The upper end is provided with an upper horizontal section, the lower end is provided with a lower horizontal section, and the middle is the main section. The main section is provided with beam bolt holes corresponding to each step. The upper edge of the beam web is fixed to the upper flange plate, and the lower edge is fixed to the lower flange plate.

[0009] Step modules, each step module corresponds to a step, and the step modules are arranged in sequence along the main section. Both ends of the step modules are fixedly connected to the main section, and the step modules of the upper and lower steps are fixedly connected;

[0010] The upper platform module is arranged at the upper end of the ladder beam, with its end fixedly connected to the upper horizontal section of the ladder beam and its front side fixedly connected to the top step module;

[0011] The lower platform module is arranged at the lower end of the ladder beam, and the end is fixedly connected to the lower horizontal section of the ladder beam. The rear side is fixedly connected to the step module at the lower end. A flange sealing plate is also provided on the lower side of the lower platform. The outer side of the flange sealing plate is sealed to the bottom surface of the lower platform, and the two ends are sealed to the beam web.

[0012] Compared with the prior art, the present invention adopting the above structure has the following beneficial effects:

[0013] The step module of the utility model is composed of multiple step molds that are detachably connected, so that the step mold can be turned over separately. The cost of the step panel accounts for a relatively high proportion in the stair mold, and the turnover number of this part in the production of different stairs is increased, which can greatly reduce the manufacturing cost of the stairs; the relative height of the step module is adjustable, so that it can adapt to the fine-tuning of the step size, and the applicability is higher; the number of steps is adjustable, and the applicability is higher; the overall structure of the mold of this solution is simplified, and the ladder beam is directly cut and formed from steel plates in the factory, with a fast production speed. The step module can be prefabricated before the stair design is finalized, which can shorten the construction period.

[0014] As a preferred embodiment, a further technical solution of the above structure is:

[0015] The tread module is constructed from a single steel plate bent into a U-shaped channel, consisting of a base plate, front side plates, and rear side plates. The front side plates are provided with a number of evenly spaced first screw holes, while the rear side plates are provided with a number of evenly spaced second screw holes. The second screw holes are oblong, and the second screw holes of the lower tread module are fixedly connected to the first screw holes of the upper tread module via second bolts. The U-shaped channel is secured to end plates at both ends, each with tread bolt holes. These holes are fixedly connected to the beam bolt holes via first bolts. This feature provides the following beneficial effects: the steel plates that can be bent are generally thin and lightweight, thus reducing steel usage by 70% compared to the original custom mold, lowering mold cost and weight.

[0016] A notch is provided on the upper edge of the front side panel, with a locating nut fixed inside the notch. A locating pin is installed in the locating nut. The locating pin is an L-shaped rib with an external thread at the lower end of the vertical portion. The horizontal portion of the locating pin abuts the upper edge of the rear side panel of the adjacent step module. This feature has the beneficial effect of preventing the center of the step module from shifting due to the oblong hole structure, improving the bearing capacity of the concrete and ensuring a more standardized step formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the staircase mold of the utility model;

[0018] Figure 2 This is an exploded view of the staircase mold structure of the utility model;

[0019] Figure 3 This is a structural diagram of the ladder beam of the utility model;

[0020] Figure 4 This is the first embodiment of the stepping module of the present utility model;

[0021] Figure 5 This is the second embodiment of the stepping module of the present utility model;

[0022] Figure 6 This is a structural diagram of the upper platform module of the utility model;

[0023] Figure 7 This is a structural diagram of the lower platform module of the utility model;

[0024] Figure 8 This is a diagram showing the arrangement of the staircase mould of the present invention when pouring concrete;

[0025] Figure 9 This is a schematic diagram of the improved structure of the step module of the utility model;

[0026] Figure 10 This is a schematic diagram of the step module and positioning structure when the mold of the utility model is used for concrete pouring (an embodiment of fixing a high-step mold);

[0027] Figure 11 This is a schematic diagram of the step module and positioning structure when the mold of the utility model is used for concrete pouring (an embodiment of fixing a low-step mold).

[0028] In the figure: 1. Ladder beam; 101. Beam web; 102. Lower flange plate; 103. Upper flange plate; 104. Reinforcement plate; 2. Step module; 201. Front side plate; 202. Bottom plate; 203. Rear side plate; 204. First screw hole; 205. Second screw hole; 206. Step bolt hole; 207. Support plate; 3. Upper platform module; 4. Lower platform module; 5. Flange blocking plate; 6. Lifting ear; 7. Tension bolt; 8. Railing reserved hole mold; 9. Bolt reserved hole mold; 10. Step embedded reinforcement; 11. Notch; 12. Positioning nut; 13. Positioning pin. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0030] See also Figures 1 to 8 A PC prefabricated horizontal staircase mold with adjustable step height includes a ladder beam 1, an upper platform module 3, a lower platform module 4, and a step module 2. The following is a detailed description of each part:

[0031] The stair beam 1 includes a web 101, a steel plate cut to the design dimensions of the staircase. It features an upper horizontal section at the top, a lower horizontal section at the bottom, and a main section in the middle. The main section is provided with bolt holes corresponding to each tread. The upper edge of the web 101 is affixed to an upper flange 103, while the lower edge is affixed to a lower flange 102. The dimensions of the prefabricated staircase are determined according to the design. The two stair beams 1 are constructed from steel plates, which are then laid out and modeled according to the prefabricated staircase model. Laser cutting is then performed to cut the steel plates. The upper and lower flanges 103 and 102 are 100mm thick steel plates, respectively, which are welded to the upper and lower edges of the web 101, forming a channel-shaped stair beam 1 and reinforcing it to prevent lateral bending. Tension bolts 7 are installed on the side of the web 101 away from the tread, connecting the two stair beams 1 to prevent expansion. The upper flange plate 103 and the lower flange plate 102 are both fixedly connected to two lifting ears 6. A reinforcing plate 104 is welded at the angle between the upper flange, the lower flange and the beam web 101.

[0032] The step modules 2 correspond to one step, and the step modules 2 are arranged in sequence along the main section. Both ends of the step modules 2 are fixedly connected to the main section, and the step modules 2 of the upper and lower steps are fixedly connected. As an option, the specific structure of the step module 2 is as follows: the step module 2 is bent into a U-shaped groove by a steel plate, including three parts: a bottom plate 202, a front side plate 201 and a rear side plate 203. A number of first screw holes 204 are arranged at equal intervals on the front side plate 201, and a number of second screw holes 205 are arranged at equal intervals on the rear side plate 203. The second screw holes 205 are oblong holes, and the second screw holes 205 of the lower step module 2 are fixedly connected to the first screw holes 204 of the upper step module 2 by second bolts; end plates are fixed at both ends of the U-shaped groove, and step bolt holes 206 are provided on the end plates, and the step bolt holes 206 are fixedly connected to the beam bolt holes by first bolts; this example uses lightweight materials and uses thinner steel plates that can be bent, which is convenient and quick to produce. Compared with the original customized mold, the steel consumption is reduced by 70%, and the mold weight is also reduced by about 30%, which greatly reduces the construction cost.

[0033] The upper platform module 3 is arranged at the upper end of the ladder beam 1, with its end fixedly connected to the upper horizontal section of the ladder beam 1 and its front side fixedly connected to the top step module 2;

[0034] The lower platform module 4 is arranged at the lower end of the ladder beam 1, and the end is fixedly connected to the lower horizontal section of the ladder beam 1, and the rear side is fixedly connected to the step module 2 at the lower end. A flange sealing plate 5 is also provided on the lower side of the lower platform. The outer side of the flange sealing plate 5 is sealed with the bottom surface of the lower platform, and the two ends are sealed with the beam web 101.

[0035] The use process of the above-mentioned mold provided by the utility model is as follows:

[0036] The first step is to cut and weld the ladder beam 1; cut the steel plate from the step, and make a U-groove by bending it. Then weld the support plate 207 in the U-groove and weld the end plates at both ends; weld the upper platform module 3, and prefabricate the circular hole on the side; weld the lower platform module 4, and prefabricate the oblong hole on the side;

[0037] In the second step, the ladder beam 1 and the step bolts are fixed to form the mold body, and the upper platform module 3, the lower platform module 4 and the flange sealing plate 5 are installed;

[0038] The third step is to connect the lifting wire to the lifting lug 6, move the mold to the concrete pouring station, adjust the mold so that the step module 2 is on the bottom side, and place the mold flat on the pouring platform;

[0039] Step 4: Remove the lifting wires, connect the lifting ears 6 of the lower flange plates 102 of the ladder beams 1 on both sides with butt bolts, and tighten the ladder beams 1 on both sides;

[0040] The fifth step is to fix the railing reserved hole mold 8 at the end of the U-shaped groove bottom plate 202 according to the stair design interval, fix the bolt reserved hole mold 9 in the middle of the U-shaped groove bottom plate 202 according to the stair design interval, and fix the step embedded reinforcement 10 at the outer edge of each step;

[0041] The sixth step is to pour concrete into the mold and level the top surface of the concrete, which is actually the downward slope of the stairs.

[0042] The present invention also includes a tread module 2 of a PC prefabricated horizontal staircase mold, which consists of a base plate 202, a front side plate 201, a rear side plate 203 and an end plate. The front side plate 201, the base plate 202 and the rear side plate 203 are connected in sequence to form a U-shaped groove. The front side plate 201 has a plurality of first screw holes 204 arranged at equal intervals on the plate surface, and the first screw holes 204 are circular holes; the rear side plate 203 has a top higher than the front side plate 201, and has a plurality of second screw holes 205 arranged at equal intervals on the plate surface, and the second screw holes 205 correspond one to one with the first screw holes 204. The second screw holes 205 are oblong holes and the height is 3 to 5 times that of the second screw holes 205 and the upper end is close to the top of the rear side plate 203; the end plate has two pieces, which are respectively fixed to the two ends of the U-shaped groove, and the end plates are provided with step bolt holes 206.

[0043] Optionally, the U-shaped groove is an integral groove with a length equal to the designed width of the staircase, with a number of support plates 207 evenly arranged in the middle, so that it is easy to manufacture and install.

[0044] Optionally, the step module 2 is composed of multiple U-groove segments connected in sequence, each U-groove segment having an end plate. The end plates of adjacent U-groove segments are fixed together to extend the step module 2, thereby further adjusting the applicability of the stair width and further expanding its utilization rate. Each U-groove segment is designed with different length standards to accommodate different design dimensions. In this example, the U-groove segments are fixed to the end plates of the U-groove segments by bolts and extended to the specified length to form a step module 2. The segmented step module 2 enables this solution to be further adapted to the construction projects of multiple-width stairs.

[0045] Furthermore, the length of the U-groove section is prefabricated into different length units for making up the length; furthermore, a width-making section is also provided.

[0046] When the mold is in a horizontal position for concrete pouring, the tread is subjected to greater concrete pressure. The two ends of the tread module 2 are fixed to the ladder beam 1, and the connection point between the middle tread and the tread is easily sunken by the concrete pressure due to the oblong hole on one side, which will affect the step formation. Since the tread module 2 is a horizontal cantilever structure, in the embodiment with a larger staircase width, the deformation of the middle part of the tread is more obvious. To solve this problem, the tread module 2 is improved. Figures 9 to 11 A notch 11 is provided on the upper edge of the front side plate 201, and a positioning nut 12 is fixed to the inside of the notch 11. A positioning pin 13 is installed in the positioning nut 12. The positioning pin 13 is an L-shaped rib. The lower end of the vertical part of the positioning pin 13 is provided with an external thread, and the horizontal part abuts against the upper edge of the rear side plate 203 of the adjacent step module 2.

[0047] For the implementation of the above improvements, see Figure 10 When the step is set at a higher height, the upper edge of the rear side plate 203 is lower than the front side plate 201, and the positioning pin 13 extends into the positioning nut 12 and moves downward. The horizontal part of the positioning pin 13 can be lowered to the bottom of the notch 11 and pressed on the upper edge of the rear side plate 203. Figure 10 This is a structural diagram of the step module 2 when it is inverted during concrete pouring. Due to the limitation of the positioning pin 13, the rear side plate 203 with the oblong hole cannot move downward, thus ensuring that the middle of the step module does not sink.

[0048] For implementation of the above, see Figure 11 When the step is set at a low height, the upper edge of the rear side plate 203 is higher than the front side plate 201, the positioning pin 13 is threadedly fixed with the positioning nut 12, and the horizontal part hooks the upper edge of the rear side plate 203. Due to the positioning pin 13, the rear side plate 203 with an oblong hole cannot sink further even if there is concrete pressure on the top.

[0049] This utility model decomposes the existing tread panel into multiple step molds according to the steps, and adjusts the step height through oblong holes, making it suitable for the production of different staircases with different step heights. Since the cost of the tread panel accounts for a relatively high proportion of the stair mold, this solution increases the number of mold uses and can significantly reduce the manufacturing cost of the staircase. The tread module of this utility model is a structure that can be individually disassembled and assembled, and the tread mold is independently rotated. The relative height of the tread module is adjustable, and the number of steps is adjustable, allowing it to be rotated in staircase production projects with different heights and different spans, which increases applicability and reduces the mold cost of staircase production.

[0050] This solution provides a staircase mold with a simplified overall structure. The ladder beams are directly cut and formed from steel plates in the factory, which speeds up production. The step modules are also quickly produced by bending steel plates. The step design is a combination of multiple U-groove sections, which allows them to be prefabricated before the staircase design is finalized, saving construction time.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes made using the contents of the present invention specification and its drawings are included in the scope of the present invention.

Claims

1. A PC prefabricated horizontal staircase mold with adjustable step height, comprising a ladder beam (1), an upper platform module (3), a lower platform module (4) and a step module (2), characterized in that: The ladder beam (1) includes a beam web (101), the beam web (101) is a steel plate cut according to the design dimensions of the stairs, with an upper horizontal section at the upper end, a lower horizontal section at the lower end, and a main section in the middle; beam bolt holes are provided on the main section corresponding to each step; the upper edge of the beam web (101) is fixedly connected to the upper flange plate (103), and the lower edge is fixedly connected to the lower flange plate (102); Step modules (2), each step module (2) corresponds to a step, and the step modules (2) are arranged in sequence along the main section. Both ends of the step modules (2) are fixedly connected to the main section, and the step modules (2) of the upper and lower steps are fixedly connected; An upper platform module (3) is arranged at the upper end of the ladder beam (1), with its end fixedly connected to the upper horizontal section of the ladder beam (1) and its front side fixedly connected to the top step module (2); The lower platform module (4) is arranged at the lower end of the ladder beam (1), the end portion is fixedly connected to the lower horizontal section of the ladder beam (1), and the rear side is fixedly connected to the step module (2) at the lower end. A flange sealing plate (5) is also provided on the lower side of the lower platform, the outer side of the flange sealing plate (5) is connected to the bottom surface of the lower platform, and the two ends are connected to the lower flange plate (102).

2. The PC prefabricated horizontal mold for stairs with adjustable step height according to claim 1 is characterized in that: The step module (2) is formed by bending a steel plate into a U-shaped groove, and comprises three parts: a bottom plate (202), a front side plate (201) and a rear side plate (203). A plurality of first screw holes (204) are arranged at equal intervals on the front side plate (201), and a plurality of second screw holes (205) are arranged at equal intervals on the rear side plate (203). The second screw holes (205) are oblong holes. The second screw holes (205) of the lower step module (2) and the first screw holes (204) of the upper step module (2) are fixedly connected by second bolts. End plates are fixedly connected at both ends of the U-shaped groove. Step bolt holes (206) are arranged on the end plates. The step bolt holes (206) are fixedly connected to the beam bolt holes by first bolts.

3. The PC prefabricated horizontal mold for stairs with adjustable step height according to claim 2 is characterized in that: A notch (11) is provided on the upper edge of the front side plate (201), a positioning nut (12) is fixedly connected to the inner side of the notch (11), a positioning pin (13) is installed in the positioning nut (12), the positioning pin (13) is an L-shaped rib, the lower end of the vertical portion of the positioning pin (13) is provided with an external thread, and the horizontal portion abuts against the upper edge of the rear side plate (203) of the adjacent step module (2).

4. The PC prefabricated horizontal mold for stairs with adjustable step height according to claim 1 is characterized in that: The upper flange and the lower flange are steel plates with a width of 100 mm, which are arranged along the shape of the beam web (101).

5. The PC prefabricated horizontal mold for stairs with adjustable step height according to claim 1 is characterized in that: The upper flange and the lower flange are both fixedly connected with lifting ears (6).

6. The PC prefabricated horizontal mold for stairs with adjustable step height according to claim 1 is characterized in that: A tension bolt (7) is provided on the other side of the beam web (101) away from the step, and the tension bolt (7) connects the ladder beams (1) on both sides.

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