Folding stair

Abstract

The utility model discloses a folding stairway which comprises two supporting frames, folding platforms are rotationally connected to the upper portions between the two supporting frames, the two folding platforms are hinged through hinges, a plurality of fixing frames are fixedly installed on one sides of the tops of the two supporting frames, supporting plates are hinged to the upper portions of the interiors of the fixing frames, and the upper portions of the interiors of the supporting plates are hinged to the upper portions of the interiors of the fixing frames. The positioning assembly is arranged on the lower portion between the two supporting frames, the positioning assembly comprises a supporting rod hinged to the lower portion of the supporting frame on one side, a movable frame is arranged on the side, close to the supporting rod, of the supporting frame on the other side, and a fixed rod is fixedly installed in the movable frame; the supporting frame can be positioned after the staircase is unfolded, displacement of the supporting frame is avoided, meanwhile, the supporting frame can be positioned after the staircase is folded, the situation that the occupied space of the staircase is increased is avoided, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stairs, in particular to a folding staircase. Background Art

[0002] Stairs have become a vertical transportation connection tool in modern houses, duplexes, split levels, villas and multiple floors. When going up and down the attic, folding stairs are usually required.

[0003] Publication No. CN218894308U discloses a foldable staircase, which ensures that the foldable staircase board is horizontally arranged by using a horizontally arranged step support with a cross bar. By pushing the side mounting plate on the outside, the two support plates can be folded together along a high-strength hinge, so that the foldable staircase board is in a vertical state. While folding, the two ends of the foldable staircase board are rotated along the short axis, so that the staircase can be folded. When the side mounting plate on the outside is pushed, the two platform boards can be folded together. The foldable staircase has a simple structure and is easy to operate. The staircase can be folded by pushing and pulling. When the staircase is folded, the space occupied by the staircase can be greatly reduced, and the staircase has a high load-bearing capacity. However, the patent still has the following problems in actual use:

[0004] The stairs can be folded in a push-pull manner. When the stairs are folded, the space occupied by the stairs can be greatly reduced, and the stairs have a higher load-bearing capacity. However, in actual use, it is not easy to position the stairs after they are extended. The stairs are prone to shifting after they are extended. At the same time, the stairs are also not easy to position after they are folded. As a result, the stairs are prone to become loose after they are folded, which increases the space occupied by the stairs.

[0005] A folding staircase is proposed to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a foldable staircase to solve the problem that the stairs are currently folded by pushing and pulling in the above-mentioned background technology. When the stairs are folded, the space occupied by the stairs can be greatly reduced, and the stairs have a higher load-bearing capacity. However, in actual use, the stairs are not easy to position after being extended, and the stairs are prone to shifting after being extended. At the same time, the stairs are also not easy to position after being folded and folded. As a result, the stairs are prone to become loose after being folded, which will increase the problem of the space occupied by the stairs.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a folding staircase, comprising two support frames;

[0008] A folding platform is rotatably connected between the two support frames, and the two upper folding platforms are hinged by hinges, and a plurality of fixing frames are fixedly installed on one side of the top of the two support frames, and a support plate is hinged on the upper part of the fixing frame, and the two groups of support plates are respectively hinged by hinges;

[0009] Also includes:

[0010] A positioning assembly is arranged between and below the two support frames;

[0011] The positioning assembly includes a support rod hinged under one support frame, and a movable frame is provided on the side of the other support frame close to the support rod, and a fixed rod is fixedly installed inside the movable frame, and a movable sleeve is slidably connected to the outside of the fixed rod;

[0012] Among them, the supporting blocks are symmetrically installed on the outside of the movable sleeve, and the inner side of the two supporting blocks is movably connected with a positioning rod, and a positioning hole is penetrated through one side of the supporting rod, and the positioning rod is adaptively connected to the positioning hole.

[0013] Preferably, an installation groove is provided on one side of the interior of the positioning rod, and positioning blocks are symmetrically slidably connected on both sides of the installation groove inside the positioning rod, and telescopic springs are sleeved on one side of the exterior of the two positioning blocks, and one end of the telescopic spring is fixedly connected to the installation groove, and a mounting block is fixedly installed on the other end of the telescopic spring, and the mounting block is fixedly connected to the positioning block.

[0014] Preferably, a limiting rod is slidably connected to one side of the interior of the two mounting blocks, and the limiting rod is fixedly connected to the mounting groove.

[0015] Preferably, a connecting rod is hinged on one side of the two mounting blocks, and a movable plate is fixedly mounted on one end of the two connecting rods away from the mounting blocks, and the movable plate is slidably connected to the mounting groove.

[0016] Preferably, a pull rope is fixedly installed on one side of the movable plate, and the pull rope is movably connected to the positioning rod, and a mounting frame is fixedly installed on one side of the positioning rod, and a sliding plate is slidably connected to an outer side of the mounting frame, and the end of the pull rope away from the movable plate is fixedly connected to the sliding plate, and a handle is fixedly installed on the side of the sliding plate away from the positioning rod.

[0017] Preferably, a limiting hole is formed through the other side of the outside of the support rod, and the positioning rod is adaptively connected to the limiting hole.

[0018] Preferably, a screw is rotatably connected to one side of the movable frame, and the screw is threadedly connected to the support frame on the other side, and a knob is fixedly installed on the end of the screw away from the movable frame, and a guide rod is fixedly installed on one side of the movable frame below the screw, and the guide rod is slidably connected to the support frame on the other side.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the foldable staircase has the following specific contents: a positioning assembly is arranged below the two support frames, so that the support frames can be positioned after the staircase is unfolded to avoid displacement of the support frames; at the same time, the support frames can be positioned after the staircase is folded and stowed to avoid increasing the space occupied by the staircase, thereby improving practicality:

[0020] 1. A positioning assembly is provided below the two support frames, and a plurality of mounting holes are provided on both sides of the two support frames. The support frames can be fixed to the building through the mounting holes and bolts, so as to facilitate the disassembly and assembly of the staircase as a whole. In the process of going up and down the attic, the support plates and folding platforms on the two support frames can be unfolded and used as a staircase. After the staircase is unfolded, the two support frames are away from each other, and the two folding platforms are fitted with the side close to the two sets of support plates. Then, the support rod can be rotated to keep the support rod horizontal so that the positioning holes on the support rod are aligned with the positioning rods on the support blocks. Then, the positioning rod can be passed through the positioning holes so that the support rod can be limited. When the positioning rod passes through the support blocks and the positioning holes, a bevel is provided on one side of the two positioning blocks so that the bevel is in contact with the support blocks. The cam is then pulled back to allow the cam to move and the two mounting blocks to move closer together, so that the cam can be removed and the support rod loses its limit position, so that the support rod can be lifted up to fold the stairs. The support frame can be positioned after the stairs are unfolded through the positioning assembly to prevent the support frame from shifting.

[0021] 2. After the stairs are folded and stowed, the two support frames are close to each other, and the knob can be turned to drive the screw to rotate. After the screw rotates, the movable frame can be driven to move through the threaded connection with the support frame. While the movable frame moves, the guide rod can be driven to slide on the support frame to limit the position, so that the movable sleeve on the movable frame moves, so that after the stairs are folded and stowed, the movable sleeve can be moved up to align the support block with the limiting hole on the support rod, and then the positioning rod is passed through the support block and the limiting hole, so that the support rod can be positioned, and then the two support frames can be positioned to avoid displacement after the stairs are folded and to avoid occupying too much space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the side structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front structure of the positioning component of the utility model;

[0024] Figure 3 This is a partial top view structural diagram of the positioning assembly of the utility model;

[0025] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0026] Figure 5 This is a schematic diagram of the structure of the positioning component of the utility model in another state.

[0027] In the figure: 1, support frame; 101, folding platform; 102, fixed frame; 103, support plate; 2, positioning assembly; 201, support rod; 202, movable frame; 203, fixed rod; 204, movable sleeve; 205, support block; 206, positioning rod; 207, positioning hole; 208, mounting groove; 209, positioning block; 210, telescopic spring; 211, mounting block; 212, limiting rod; 213, connecting rod; 214, movable plate; 215, pull rope; 216, mounting frame; 217, sliding plate; 218, handle; 219, limiting hole; 220, screw; 221, knob; 222, guide rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-5The utility model provides a technical solution: a folding staircase, including two support frames 1, a folding platform 101 is rotatably connected between the two support frames 1, and the two upper folding platforms 101 are hinged by hinges, and a plurality of fixing frames 102 are fixedly installed on one side of the top of the two support frames 1, and a support plate 103 is hinged on the upper part of the fixing frame 102, and the two groups of support plates 103 are respectively hinged by hinges, and also includes: a positioning component 2, which is arranged below the two support frames 1, wherein the positioning component 2 includes a support rod 201 hinged at the bottom of one support frame 1, and the other A movable frame 202 is provided on one side of the support frame 1 close to the support rod 201, and a fixed rod 203 is fixedly installed inside the movable frame 202, and a movable sleeve 204 is slidably connected to the outside of the fixed rod 203, wherein support blocks 205 are symmetrically installed on the outside of the movable sleeve 204, and a positioning rod 206 is movably connected to one side of the inside of the two support blocks 205, and a positioning hole 207 is opened through one side of the support rod 201, and the positioning rod 206 is adaptably connected to the positioning hole 207, so that the support frame 1 can be positioned through the positioning component 2 after the stairs are unfolded to avoid displacement of the support frame 1.

[0030] A mounting groove 208 is provided on one side of the interior of the positioning rod 206, and positioning blocks 209 are symmetrically slidably connected on both sides of the mounting groove 208 inside the positioning rod 206, and telescopic springs 210 are sleeved on one side of the exterior of the two positioning blocks 209, and one end of the telescopic spring 210 is fixedly connected to the mounting groove 208, and a mounting block 211 is fixedly installed on the other end of the telescopic spring 210, and the mounting block 211 is fixedly connected to the positioning block 209, so that the positioning block 209 can be automatically reset after moving. The inner side of the two mounting blocks 211 is slidably connected to a limiting rod 212, and the limiting rod 212 is fixedly connected to the mounting groove 208, so that the movement of the mounting block 211 is limited. A connecting rod 213 is hinged on one side of the two mounting blocks 211, and a moving plate 214 is fixedly installed on one end of the two connecting rods 213 away from the mounting block 211, and the moving plate 214 is slidably connected to the mounting groove 208, so that the movement of the moving plate 214 can drive the mounting block 211 to move, and one side of the moving plate 214 is fixedly installed. A pull rope 215 is provided, and the pull rope 215 is movably connected to the positioning rod 206, and a mounting frame 216 is fixedly installed on one side of the positioning rod 206, and a sliding plate 217 is slidably connected to the outer side of the mounting frame 216, and the end of the pull rope 215 away from the movable plate 214 is fixedly connected to the sliding plate 217, and a handle 218 is fixedly installed on the side of the sliding plate 217 away from the positioning rod 206, so as to facilitate the movement of the movable plate 214, and a limiting hole 219 is provided on the other side of the outer side of the support rod 201, and the positioning rod 206 is adaptively connected with the limiting hole 219, so that the two support frames 1 can be positioned after the stairs are folded, and a screw rod 220 is rotatably connected to one side of the movable frame 202, and the screw rod 220 is threadedly connected to the support frame 1 on the other side, and a knob 221 is fixedly installed on the end of the screw rod 220 away from the movable frame 202, and a guide rod 222 is fixedly installed on one side of the movable frame 202 below the screw rod 220, and the guide rod 222 is slidably connected to the support frame 1 on the other side, so that the position of the movable frame 202 can be adjusted.

[0031] Working principle: Before using this kind of folding staircase, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Figure 5As shown, a positioning assembly 2 is provided below the two support frames 1, and the support plates 103 and the folding platform 101 on the two support frames 1 can be unfolded and used as a staircase. After the staircase is unfolded, the two support frames 1 move away from each other, and the two folding platforms 101 fit with the side close to the two groups of support plates 103. Then, the support rod 201 can be rotated to keep the support rod 201 horizontal, so that the positioning hole 207 on the support rod 201 is aligned with the positioning rod 206 on the support block 205, and then the positioning rod 206 can be passed through the positioning hole 207, so that the support rod 201 can be limited, and when the positioning rod 206 passes through the support block 205 and the positioning hole 207, a bevel is provided on one side of the two positioning blocks 209, so that the bevel is in contact with the support block 205, and then the positioning block 209 can be pushed to move, so that the telescopic spring 210 can be stretched, so that the positioning block 20 9 is retracted into the installation groove 208, and after the positioning rod 206 passes through the positioning hole 207 and the support block 205, the positioning block 209 is reset under the action of the telescopic spring 210, thereby limiting the positioning rod 206 to prevent the positioning rod 206 from falling off, and when the stairs are folded and stowed, the handle 218 can be pulled to drive the sliding plate 217 to move, and the moving plate 214 can be pulled to move by the pull rope 215. After the moving plate 214 moves, it drives the connecting rod 213 to rotate. After the connecting rod 213 rotates, the two installation blocks 211 can be pulled close to each other, thereby retracting the positioning block 209 into the installation groove 208, and the positioning rod 206 can be removed, so that the support rod 201 loses its limit, and the support rod 201 can be lifted to fold the stairs. The positioning assembly 2 allows the stairs to position the support frame 1 after unfolding to prevent the support frame 1 from shifting;

[0032] After the stairs are folded and stowed, the two support frames 1 are close to each other, and the knob 221 can be turned to drive the screw rod 220 to rotate. After the screw rod 220 rotates, it can drive the movable frame 202 to move through the threaded connection with the support frame 1. While the movable frame 202 moves, it can drive the guide rod 222 to slide on the support frame 1 for limiting, so that the movable sleeve 204 on the movable frame 202 moves, so that after the stairs are folded and stowed, the movable sleeve 204 can be moved up to align the support block 205 with the limiting hole 219 on the support rod 201, and then the positioning rod 206 is passed through the support block 205 and the limiting hole 219, so that the support rod 201 can be positioned, and then the two support frames 1 can be positioned, so as to avoid displacement after the stairs are folded and avoid occupying too much space.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A folding staircase comprising two support frames (1); A folding platform (101) is rotatably connected above the two support frames (1), and the two upper folding platforms (101) are hingedly connected by hinges, and a plurality of fixing frames (102) are fixedly installed on one side of the top of the two support frames (1), and a support plate (103) is hingedly connected to the upper part of the fixing frame (102), and the two groups of support plates (103) are respectively hingedly connected by hinges; It is characterized in that Also includes: A positioning assembly (2) is arranged between and below the two support frames (1); The positioning assembly (2) comprises a support rod (201) hingedly connected to the bottom of one support frame (1), and a movable frame (202) is provided on the side of the other support frame (1) close to the support rod (201), and a fixed rod (203) is fixedly installed inside the movable frame (202), and a movable sleeve (204) is slidably connected to the outside of the fixed rod (203); The movable sleeve (204) is symmetrically provided with support blocks (205) on the outside, and one side of the inside of the two support blocks (205) is movably connected with a positioning rod (206), and a positioning hole (207) is provided through one side of the support rod (201), and the positioning rod (206) is adaptively connected to the positioning hole (207).

2. A foldable staircase according to claim 1, characterized in that: A mounting groove (208) is provided on one side of the interior of the positioning rod (206), and positioning blocks (209) are symmetrically slidably connected on both sides of the mounting groove (208) inside the positioning rod (206), and telescopic springs (210) are sleeved on one side of the exterior of the two positioning blocks (209), and one end of the telescopic spring (210) is fixedly connected to the mounting groove (208), and a mounting block (211) is fixedly installed on the other end of the telescopic spring (210), and the mounting block (211) is fixedly connected to the positioning block (209).

3. A foldable staircase according to claim 2, characterized in that: A limiting rod (212) is slidably connected to one side of the interior of the two mounting blocks (211), and the limiting rod (212) is fixedly connected to the mounting groove (208).

4. A foldable staircase according to claim 2, characterized in that: A connecting rod (213) is hingedly connected to one side of the two mounting blocks (211), and a moving plate (214) is fixedly mounted on one end of the two connecting rods (213) away from the mounting blocks (211), and the moving plate (214) is slidably connected to the mounting groove (208).

5. A foldable staircase according to claim 4, characterized in that: A pull rope (215) is fixedly installed on one side of the movable plate (214), and the pull rope (215) is movably connected to the positioning rod (206), and a mounting frame (216) is fixedly installed on one side of the positioning rod (206), and a sliding plate (217) is slidably connected to an outer side of the mounting frame (216), and an end of the pull rope (215) away from the movable plate (214) is fixedly connected to the sliding plate (217), and a handle (218) is fixedly installed on a side of the sliding plate (217) away from the positioning rod (206).

6. A foldable staircase according to claim 1, characterized in that: A limiting hole (219) is provided through the other side of the outside of the support rod (201), and the positioning rod (206) is adaptively connected to the limiting hole (219).

7. The foldable staircase according to claim 1, characterized in that: A screw rod (220) is rotatably connected to one side of the movable frame (202), and the screw rod (220) is threadedly connected to the support frame (1) on the other side, and a knob (221) is fixedly installed on one end of the screw rod (220) away from the movable frame (202), and a guide rod (222) is fixedly installed on one side of the movable frame (202) below the screw rod (220), and the guide rod (222) is slidably connected to the support frame (1) on the other side.

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