A clamping device for stair slab assembly

Abstract

The purpose of the present invention is to solve the existing problem of inconvenience in carrying stair treads, and discloses a stair tread assembly clamping device, including a rotating shaft, a pull ring, a pull rod, a collar, an air bag, a connecting frame, a slider, a fastening screw, a guide tube, a guide frame, a vent box, a first rotating plate, a friction layer, a groove, an air outlet, a first connecting block, a spiral spring, a second connecting block and a second rotating plate. The present invention reasonably utilizes the clamping force of the first rotating plate and the second rotating plate on the stair tread to carry the stair tread, and combined with the setting of the friction layer, it has a certain anti-slip function to prevent the stair tread from sliding off, thereby facilitating the protection of the stair tread, and has a reasonable design, a simple structure, convenient operation, and strong practicality.

Description

Technical Field

[0001] The invention relates to the field of machinery, and in particular to a clamping device for stair slab assembly. Background Art

[0002] Most modern civil building stairs use plate-type stairs, which are beautiful and easy to construct. However, in terms of earthquake resistance, the stiffness of plate-type stairs is not as good as that of beam-type stairs. If the thickness of the stair slab is not enough, it is easy to produce compression and bending stress under the action of earthquake horizontal force and yield and fracture, causing heavy casualties. Therefore, the building seismic code revised after the Wenchuan earthquake requires that stair components must participate in the overall analysis of the structural model. If the compression and bending stress is taken into account, the floor slab of the plate-type stairs is required to be relatively thick, which increases the deadweight load, wastes materials, and is not economical. Recently, some large staircases in civil and commercial buildings have also begun to use beam-type stairs because they are reasonably stressed. Compared with plate-type stairs, they are more reasonable and economical when participating in the overall structural analysis and meeting the earthquake resistance requirements.

[0003] Stair tread, an architectural term, refers to the board between the landings of the stairs. It can be a whole board or multiple small treads. It is classified by material and structure. For different types of stairs, such as beam stairs, plate stairs, cantilever stairs, etc., suitable stair treads are designed according to their architectural structural characteristics.

[0004] The stairs are assembled by splicing a plurality of L-shaped small treads, which makes it inconvenient to carry the stair treads. Since the cross-section is an L-shaped structure and is generally long, the stair treads are easily deflected during transportation, affecting the transportation of the stair treads. Moreover, the stair treads are generally carried by hand during transportation, which makes them easy to slip. In addition, since the stair treads are placed for a long time, a lot of dust is easily floating on the surface of the stair treads. Dust is also easily floating on the stair treads during transportation, affecting the cleanliness of the stair treads and thus affecting the splicing of the stair treads. Therefore, it is necessary to design a clamping device for stair tread assembly to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a clamping device for stair tread assembly.

[0006] The present invention is achieved through the following technical solutions:

[0007] The camming device of claim 1, wherein the first and second rotation plates are connected at their ends, the second end of the first and second rotation plates being connected at their ends, the second end of the first and second rotation plates being connected at their ends, the second end of the first and second rotation plates being connected at their ends, the second end of the first and second rotation plates being connected at their ends.

[0008] Preferably, the friction layer is made of rubber material.

[0009] Preferably, the ventilation box is a hollow structure and is connected to the conduit and the air outlet respectively.

[0010] Preferably, the sliding block and the guide frame can slide.

[0011] Preferably, the first rotating plate and the second rotating plate are rotationally engaged with each other.

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

[0013] 1. The present invention adopts a friction layer of rubber material, thereby increasing the friction force on the stair tread when in contact with the stair tread, facilitating the stair tread from falling when being carried, and better protecting the stair tread;

[0014] 2. The first rotating plate and the second rotating plate can replace the manual clamping of the stair slab, thereby protecting the operator's hands and facilitating the clamping of the L-shaped stair slab;

[0015] 3. The setting of the spiral spring facilitates the first rotating plate and the second rotating plate to be pushed outward, and then facilitates the first rotating plate and the second rotating plate to be clamped on the outside of the stair plate, which is easy to operate and has a certain buffer force, thereby preventing the first rotating plate and the second rotating plate from exerting excessive force on the stair plate, and is helpful for protecting the stair plate;

[0016] 4. The cooperation between the airbag and the ventilation box makes it easier to clean the dust on the surface of the stair treads. By cleaning the dust, it is easier to splice the stair treads and prevent the dust from affecting the splicing of the stair treads.

[0017] 5. The present invention rationally utilizes the clamping force of the first rotating plate and the second rotating plate on the stair slab to carry the stair slab, and combined with the setting of the friction layer, it has a certain anti-slip function to prevent the stair slab from sliding, thereby facilitating the protection of the stair slab. It has a reasonable design, a simple structure, is easy to operate, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the friction layer of the present invention.

[0020] Explanation of numbers: 1. rotating shaft, 2. pull ring, 3. pull rod, 4. collar, 5. air bag, 6. connecting frame, 7. slider, 8. fastening screw, 9. catheter, 10. guide frame, 11. ventilation box, 12. first rotating plate, 13. friction layer, 14. groove, 15. air outlet, 16. first connecting block, 17. coil spring, 18. second connecting block, 19. second rotating plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-2 , the present invention provides a technical solution:

[0023] A clamping device for stair tread assembly, comprising a first rotating plate 12 and a second rotating plate 19, the ends of the first rotating plate 12 and the second rotating plate 19 are connected to a rotating shaft 1, a collar 4 is sleeved on the surface of the rotating shaft 1, a pull rod 3 is fixedly connected to the surface of the collar 4, a pull ring 2 is fixedly installed on the other end of the pull rod 3, a first connecting block 16 is welded on the left side of the surface of the first rotating plate 12, a second connecting block 18 is welded on the upper side of the surface of the second rotating plate 19, a coil spring 17 is fixedly installed between the first connecting block 16 and the second connecting block 18, the first rotating plate 12 and the second rotating plate 1 A friction layer 13 is fixedly installed on the inner surface of 9, and grooves 14 are evenly opened on the friction layer 13. Ventilation boxes 11 are welded to the sides of the first rotating plate 12 and the second rotating plate 19, and air outlets 15 are evenly arranged on the lower surface of the ventilation box 11. A catheter 9 is fixedly installed on the surface of the ventilation box 11, and an airbag 5 is fixedly installed on the other end of the catheter 9. A guide frame 10 is welded to the outer side of the surface of the first rotating plate 12 and the second rotating plate 19, and a slider 7 is sleeved on the surface of the guide frame 10. A connecting frame 6 is connected between the sliders 7, and a fastening screw 8 is installed between the slider 7 and the guide frame 10.

[0024] The friction layer 13 is made of rubber material.

[0025] The ventilation box 11 is a hollow structure and is connected to the conduit 9 and the air outlet 15 respectively.

[0026] The slide block 7 and the guide frame 10 can slide.

[0027] The first rotating plate 12 and the second rotating plate 19 are rotationally engaged with each other.

[0028] Operation steps: First, the first rotating plate 12 and the second rotating plate 19 will be pushed outward by the push of the coil spring 17. At this time, the first rotating plate 12 and the second rotating plate 19 are stuck on the L-shaped stair board, and then both hands hold the pull ring 2 and the connecting frame 6 respectively, and push the connecting frame 6 inward while pulling the pull ring 2 outward, which will push the first rotating plate 12 and the second rotating plate 19 to tighten the stair board. Due to the setting of the friction layer 13, the friction force on the stair board is increased, and then the user only needs to move the stair board through the device to move the stair board to the installation location of the stairs. During this transportation process, the airbag 5 can be repeatedly squeezed, and then the ventilation box 11 will be inflated through the conduit 9, so that the gas is ejected through the air outlet 15 to blow away the dust on the stair board, and then stop pushing the connecting frame 6, remove the device, and install the stair board.

[0029] The present invention rationally utilizes the clamping force of the first rotating plate and the second rotating plate on the stair slab to carry the stair slab, and combined with the setting of the friction layer, has a certain anti-slip function to prevent the stair slab from sliding, thereby facilitating the protection of the stair slab, and has a reasonable design, simple structure, convenient operation and strong practicality.

[0030] This specific embodiment is only an explanation of the present invention, not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A stair tread assembly clamping device, comprising a first rotating plate (12) and a second rotating plate (19), characterized in that: The ends of the first rotating plate (12) and the second rotating plate (19) are connected to a rotating shaft (1), a sleeve (4) is sleeved on the surface of the rotating shaft (1), a pull rod (3) is fixedly connected to the surface of the sleeve (4), and a pull ring (2) is fixedly installed on the other end of the pull rod (3), a first connecting block (16) is welded on the left side of the surface of the first rotating plate (12), a second connecting block (18) is welded on the upper side of the surface of the second rotating plate (19), a coil spring (17) is fixedly installed between the first connecting block (16) and the second connecting block (18), and a friction layer (13) is fixedly installed on the inner surfaces of the first rotating plate (12) and the second rotating plate (19). The friction layer (13) is evenly provided with grooves (14); the sides of the first rotating plate (12) and the second rotating plate (19) are both welded with ventilation boxes (11); the lower surface of the ventilation box (11) is evenly provided with air outlets (15); a catheter (9) is fixedly installed on the surface of the ventilation box (11); an air bag (5) is fixedly installed on the other end of the catheter (9); a guide frame (10) is welded on the outer side of the surface of the first rotating plate (12) and the second rotating plate (19); a slider (7) is sleeved on the surface of the guide frame (10); a connecting frame (6) is connected between the sliders (7); and a fastening screw (8) is installed between the slider (7) and the guide frame (10); During operation, the pull ring (2) and the connecting frame (6) are held by both hands respectively, and the pull ring (2) is pulled outward while the connecting frame (6) is pushed inward, so that the first rotating plate (12) and the second rotating plate (19) are pushed and the staircase plate is clamped.

2. A stair tread assembly clamping device according to claim 1, characterized in that: The friction layer (13) is made of rubber material.

3. A stair tread assembly clamping device according to claim 1, characterized in that: The ventilation box (11) is a hollow structure and is connected to the conduit (9) and the air outlet (15) respectively.

4. A stair tread assembly clamping device according to claim 1, characterized in that: The slide block (7) is slidably connected to the guide frame (10).

5. The stair tread assembly clamping device according to claim 1, characterized in that: The first rotating plate (12) and the second rotating plate (19) are rotationally matched.

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