Prefabricated stair component for fabricated building

Abstract

The utility model discloses a prefabricated stair component for an assembly type building, and relates to the technical field of prefabricated stairs. The top of the base is fixedly connected with a support, the top of the base on the rear side of the support is slidably provided with a stair front tire, the middle of the support is rotatably connected with a first screw rod through a bearing, the front end of the first screw rod is fixedly connected with a first hand-cranking frame, and the rear end of the first screw rod is screwed into the stair front tire in a threaded mode; the top of the base on the rear side of the stair front tire is fixedly connected with a stair rear tire. The first screw rod is rotated to drive the stair front tire to move towards the stair rear tire, the stair front tire is moved to the needed position, the two sides of the stair front tire and the two sides of the stair rear tire are connected in a plugging mode through the end sealing plate, the second screw rod is rotated to drive the pressing base to move towards the end sealing plate, the pressing base abuts against the outer wall of the end sealing plate, and therefore the stair front tire and the stair rear tire are fixed. And the end sealing plate can be fixed without using a plurality of bolts and nuts, so that the operation is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of precast stairs, and particularly relates to a precast stair component for an assembled building. Background Art

[0002] With the development of assembled buildings in China, the construction market has started to mass-produce and apply precast concrete stairs. After retrieval, a patent with the application number 201922340436.6 discloses a precast stair component for an assembled building, including a base. The base is horizontally arranged, and a vertical-shaped tire rack is fixedly installed in the middle of the base through positioning bolts. One side of the tire rack is fixedly connected with a front tire. The side of the front tire away from the tire rack is in a stepped shape. A tread plate adapted to the side surface of the front tire is connected to the side of the front tire away from the tire rack. A horizontally arranged core shaft is fixedly arranged on the side of the tread plate away from the front tire. The other end of the core shaft is connected with a side formwork. End closing plates are connected between the two ends of the side formwork and the tread plate through connecting bolts.

[0003] However, during the actual use process, the applicant found that when connecting and sealing the two sides of the front tire and the rear tire through the end closing plates, it is necessary to use the cooperation of multiple connecting bolts and nuts to press and fix the end closing plates, resulting in low combination and disassembly efficiency and inconvenient operation, thus leading to low work efficiency and inability to meet the use requirements. In view of this, we propose a precast stair component for an assembled building. Summary of the Utility Model

[0004] To solve the above technical problems, the present utility model is realized through the following technical solutions:

[0005] The present utility model is a precast stair component for an assembled building, including a base. A support is fixedly connected to the top of the base. A stair front tire is slidably arranged on the top of the base behind the support. A first screw rod is rotatably connected to the middle of the support through a bearing. A first hand crank is fixedly connected to the front end of the first screw rod. The rear end of the first screw rod is threadedly screwed into the stair front tire. A stair rear tire is fixedly connected to the top of the base behind the stair front tire. The two sides of the stair rear tire are respectively connected to the two sides of the stair front tire through end closing plates. A closing plate pressing seat is fixedly connected to the top of the base. The closing plate pressing seat includes a fixed seat. One side of the fixed seat is movably connected with a pressing seat. An abutting column is fixedly connected to the side of the pressing seat away from the fixed seat. A second screw rod is rotatably connected to the other side of the fixed seat through a bearing. One end of the second screw rod is threadedly screwed into the pressing seat. A second hand crank is fixedly connected to the other end of the second screw rod. Two closing plate pressing seats are arranged on the top of the base. The abutting columns on the two closing plate pressing seats respectively abut against the outer walls of the two end closing plates.

[0006] Preferably, guiding sliding columns are symmetrically and fixedly connected to the supports on both sides of the first screw rod, and the front ends of the guiding sliding columns extend into the front tire of the staircase and are fixedly provided with limiting sliders.

[0007] Preferably, limiting sliding grooves are formed inside the front tire of the staircase, and the limiting sliders slide along the limiting sliding grooves.

[0008] Preferably, bottom grooves are formed at the bottoms of the front tires of the staircase, and supporting rails are symmetrically and fixedly connected to the tops of the bases at the rear sides of the supports.

[0009] Preferably, rollers are rotatably connected to the tops of the supporting rails, and the rollers roll along the tops of the bottom grooves.

[0010] Preferably, connecting grooves are formed on both sides of the rear tire of the staircase and both sides of the front tire of the staircase, and connecting protrusions are symmetrically arranged on the inner walls of the end sealing plates, and the connecting protrusions are in fit connection with the connecting grooves.

[0011] The utility model has the following beneficial effects:

[0012] For a prefabricated staircase component for an assembled building of the utility model, by rotating the first screw rod to drive the front tire of the staircase to move towards the rear tire of the staircase, moving the front tire of the staircase to a required position, and sealing and connecting both sides of the front tire of the staircase and the rear tire of the staircase through the end sealing plate, the pressing seat can be driven to move towards the end sealing plate by rotating the second screw rod, so that it abuts against the outer wall of the end sealing plate, and then the end sealing plate can be fixed. There is no need to use multiple bolts and nuts for fixing, and the operation is more convenient, which can improve work efficiency and better meet the use requirements. Through the cooperation of the limiting slider and the limiting sliding groove, it is convenient for personnel to quickly adjust the distance between the front tire of the staircase and the rear tire of the staircase to a required distance. Through the cooperation of the bottom groove and the roller, the sliding friction between two-thirds of the bottom of the front tire of the staircase and the base can be converted into the rolling friction between the front tire of the staircase and the roller, thereby reducing the resistance when the front tire of the staircase moves and making the movement of the front tire of the staircase easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a prefabricated staircase component for an assembled building of the present utility model;

[0015] Figure 2 It is a top view of a prefabricated staircase component for an assembled building of the present utility model;

[0016] Figure 3 For a precast staircase component for an assembled building of the present utility model Figure 2 An enlarged view of the structure at position A in the figure.

[0017] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0018] 1. Base; 2. Support; 3. Front staircase tire; 31. Bottom groove; 32. Limit sliding groove; 4. First screw; 41. First hand crank; 5. Guide sliding column; 51. Limit sliding block; 6. Rear staircase tire; 7. End sealing plate; 71. Connecting protrusion; 8. Sealing plate pressing seat; 81. Fixed seat; 82. Pressing seat; 83. Contact column; 84. Second hand crank; 85. Second screw; 9. Support rail; 91. Roller; 10. Connecting groove. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-3 as shown, the present utility model provides a technical solution:

[0021] Embodiment 1: A precast staircase component for prefabricated buildings, including a base 1. A support 2 is fixedly connected to the top of the base 1. A front staircase tire 3 is slidably arranged on the top of the base 1 behind the support 2. The middle of the support 2 is rotatably connected to a first screw rod 4 through a bearing. A first hand crank 41 is fixedly connected to the front end of the first screw rod 4. The rear end of the first screw rod 4 is threadedly screwed into the front staircase tire 3. A rear staircase tire 6 is fixedly connected to the top of the base 1 behind the front staircase tire 3. Both sides of the rear staircase tire 6 are respectively connected to both sides of the front staircase tire 3 through end closing plates 7. Connecting grooves 10 are provided on both sides of the rear staircase tire 6 and both sides of the front staircase tire 3. Connecting protrusions 71 are symmetrically arranged on the inner wall of the end closing plate 7. The connecting protrusions 71 are in fit connection with the connecting grooves 10 for limiting the end closing plate 7 to prevent the end closing plate 7 from moving. A sealing plate pressing seat 8 is fixedly connected to the top of the base 1. The sealing plate pressing seat 8 includes a fixed seat 81. One side of the fixed seat 81 is movably connected to a pressing seat 82. A contact column 83 is fixedly connected to the side of the pressing seat 82 away from the fixed seat 81. The other side of the fixed seat 81 is rotatably connected to a second screw rod 85 through a bearing. One end of the second screw rod 85 is threadedly screwed into the pressing seat 82. A second hand crank 84 is fixedly connected to the other end of the second screw rod 85. Two sealing plate pressing seats 8 are arranged on the top of the base 1. The contact columns 83 on the two sealing plate pressing seats 8 respectively abut against the outer walls of the two end closing plates 7. By rotating the second screw rod 85 to drive the pressing seat 82 to move towards the end closing plate 7, so that the contact column 83 abuts against the outer wall of the end closing plate 7, the end closing plate 7 can be fixed. There is no need to use multiple bolts and nuts for fixing, and the operation is more convenient, which can improve work efficiency and better meet the use requirements. When pouring the precast staircase for prefabricated buildings, the first hand crank 41 can be rotated clockwise first to drive the first screw rod 4 to rotate. The rotation of the first screw rod 4 can drive the front staircase tire 3 to move towards the rear staircase tire 6, and the front staircase tire 3 is moved and adjusted to the required position. Then, the two connecting protrusions 71 on the end closing plate 7 are respectively stuck in the connecting grooves 10 on one side of the front staircase tire 3 and one side of the rear staircase tire 6, and the second hand crank 84 is manually rotated clockwise to drive the second screw rod 85 to rotate. The rotation of the second screw rod 85 can drive the pressing seat 82 together with the contact column 83 to move towards the end closing plate 7, so that the contact column 83 abuts against the end closing plate 7, the end closing plate 7 is tightly pressed, and in the same way, the other side of the front staircase tire 3 and the rear staircase tire 6 is sealed and connected by using the end closing plate 7. Then, precast steel bars are placed in the staircase mold groove between the front staircase tire 3 and the rear staircase tire 6 and concrete is poured. Finally, the concrete at the top is leveled. After the concrete strength is cured to the demoulding requirement, the above steps are operated in reverse, and the concrete precast staircase can be demoulded.

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that on the supports 2 on both sides of the first screw rod 4, guiding sliding columns 5 are symmetrically and fixedly connected. The front ends of the guiding sliding columns 5 extend into the front stair tire 3 and are fixedly provided with limiting sliding blocks 51. Limiting sliding grooves 32 are formed inside the front stair tire 3, and the limiting sliding blocks 51 slide along the limiting sliding grooves 32 to realize the limitation of the front stair tire 3, which can facilitate personnel to adjust the distance between the front stair tire 3 and the rear stair tire 6 to the required distance. A bottom groove 31 is formed at the bottom of the front stair tire 3. The bottom groove 31 is located at the bottom of the front stair tire 3 on the front side of the step groove. The part of the front stair tire 3 where the step groove is located is effectively attached to the bottom of the base 1. On the top of the base 1 at the rear side of the support 2, support rails 9 are symmetrically and fixedly connected. Rolling wheels 91 are connected to the tops of the support rails 9 in a rolling manner. The rolling wheels 91 roll along the top of the bottom groove 31 to reduce the friction when the front stair tire 3 moves, making it easier for the front stair tire 3 to move. When moving the front stair tire 3 closer to the rear stair tire 6, when the limiting sliding block 51 moves to the foremost side of the limiting sliding groove 32, the front stair tire 3 can no longer move. At this time, the front stair tire 3 is in the required position. During the process of moving the front stair tire 3, the cooperation between the bottom groove 31 and the rolling wheels 91 can convert the sliding friction between two-thirds of the bottom of the front stair tire 3 and the base 1 into the rolling friction between the front stair tire 3 and the rolling wheels 91, thereby reducing the resistance when the front stair tire 3 moves and making it easier for the front stair tire 3 to move.

[0023] Working principle: When in use, during the casting of precast stairs for prefabricated buildings, the first hand crank 41 can be rotated clockwise to drive the first screw rod 4 to rotate. The rotation of the first screw rod 4 can drive the front stair tire 3 to move towards the rear stair tire 6, and the front stair tire 3 can be moved and adjusted to the required position. When the front stair tire 3 is moved towards the rear stair tire 6 and the limit slider 51 moves to the foremost side of the limit chute 32, the front stair tire 3 can no longer move. At this time, the front stair tire 3 is in the required position. During the movement of the front stair tire 3, the cooperation between the bottom groove 31 and the roller 91 can convert the sliding friction between two-thirds of the bottom of the front stair tire 3 and the base 1 into the rolling friction between the front stair tire 3 and the roller 91, thereby reducing the resistance when the front stair tire 3 moves and making the movement of the front stair tire 3 easier. Then, the two connecting protrusions 71 on the end sealing plate 7 are respectively clamped in the connecting grooves 10 on one side of the front stair tire 3 and one side of the rear stair tire 6, and the second hand crank 84 is manually rotated clockwise to drive the second screw rod 85 to rotate. The rotation of the second screw rod 85 can drive the pressing seat 82 together with the abutting column 83 to move towards the end sealing plate 7, so that the abutting column 83 abuts against the end sealing plate 7, pressing the end sealing plate 7 tightly. And in the same way, the other side of the front stair tire 3 and the rear stair tire 6 is sealed and connected by using the end sealing plate 7. Then, precast steel bars are placed in the stair mold groove between the front stair tire 3 and the rear stair tire 6 and concrete is poured. Finally, the concrete at the top is leveled. After the concrete strength cures to the demolding requirement, the above steps are operated in reverse to demold the precast concrete stairs.

[0024] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0025] The above are only the preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the foregoing embodiments and any equivalent replacement of some technical features thereof all fall within the protection scope of the present invention.

Claims

1. A prefabricated staircase component for assembled buildings, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a support (2); a stair front tire (3) is slidably provided on the top of the base (1) on the rear side of the support (2); a first screw rod (4) is rotatably connected to the middle part of the support (2) via a bearing; a first hand crank frame (41) is fixedly connected to the front end of the first screw rod (4); a rear end of the first screw rod (4) is screwed into the stair front tire (3); a stair rear tire (6) is fixedly connected to the top of the base (1) on the rear side of the stair front tire (3); two sides of the stair rear tire (6) are respectively connected to two sides of the stair front tire (3) via end sealing plates (7); a sealing plate pressing seat (8) is fixedly connected to the top of the base (1); the sealing plate pressing seat (8) is fixedly connected to the top of the base (1); The plate pressing seat (8) comprises a fixed seat (81), one side of the fixed seat (81) is movably connected to a pressing seat (82), a side of the pressing seat (82) away from the fixed seat (81) is fixedly connected to an abutment column (83), the other side of the fixed seat (81) is rotatably connected to a second screw rod (85) via a bearing, one end of the second screw rod (85) is threaded into the pressing seat (82), and the other end of the second screw rod (85) is fixedly connected to a second hand crank frame (84), and two sealing plate pressing seats (8) are provided on the top of the base (1), and the abutment columns (83) on the two sealing plate pressing seats (8) are respectively abutted against the outer walls of the two end sealing plates (7).

2. The prefabricated staircase component for assembled buildings according to claim 1, characterized in that: Guide slide columns (5) are symmetrically fixedly connected to the supports (2) on both sides of the first screw rod (4), and the front ends of the guide slide columns (5) extend into the front step (3) of the staircase and are fixedly provided with limit sliders (51).

3. The prefabricated staircase component for assembled buildings according to claim 2, characterized in that: A limiting slide groove (32) is provided inside the front step (3) of the staircase, and the limiting sliding block (51) slides along the limiting slide groove (32).

4. The prefabricated staircase component for assembled buildings according to claim 1, characterized in that: A bottom groove (31) is provided at the bottom of the front step (3) of the staircase, and a support rail (9) is symmetrically fixedly connected to the top of the base (1) at the rear side of the support (2).

5. The prefabricated staircase component for assembled buildings according to claim 4, characterized in that: The top of the support rail (9) is rotatably connected to a roller (91), and the roller (91) rolls along the top of the bottom groove (31).

6. The prefabricated staircase component for assembled buildings according to claim 1, characterized in that: Both sides of the stair rear step (6) and both sides of the stair front step (3) are provided with connecting grooves (10), and the inner wall of the end sealing plate (7) is symmetrically provided with connecting protrusions (71), and the connecting protrusions (71) are matched and connected with the connecting grooves (10).

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