An elevator pit ladder

Abstract

The application discloses an elevator pit ladder and belongs to the field of elevator pit ladders.The elevator pit ladder comprises at least two steps serving as steps, folding frames arranged on the two sides of the steps and used for driving the steps to switch between vertical and horizontal states, first hinge seats hinged to the top of the folding frames and used for being mounted on the side wall of an elevator pit, and folding push rods hinged to the same side wall at a position below the folding frames and hinged to the folding frames at movable ends and used for driving the folding frames to fold.The step of the elevator pit ladder can be in a horizontal state, and people can tread more stably, thereby avoiding the problem that a pole type ladder is unstable to tread, and meanwhile, the folding frames can be obliquely unfolded and exposed in the visual field of people when being used, the visual field of people is better during the process of entering the pit, people do not need to try step by step to go down the pit, and the safety risk of going down the pit caused by poor visual field is reduced.

Description

Technical Field

[0001] This application relates to the field of elevator pit ladder technology, specifically an elevator pit ladder. Background Technology

[0002] An elevator pit ladder is a double-column fixed straight ladder that is fixed to the wall of the elevator shaft pit. It is mainly used by maintenance personnel and technicians to safely enter and exit the pit for maintenance, inspection, or rescue operations. Its core function is to provide a vertical passage, ensuring that personnel can work safely in the narrow, low pit environment.

[0003] Traditional ladders are fixed to the side wall of the pit. To avoid occupying pit space and interfering with the installation and maintenance of other equipment (such as buffers and speed limiter tensioning wheels), vertical pole-type ladders are generally used. However, when workers go down the well, this type of ladder cannot get a line of sight because it is installed on the side wall of the pit near the elevator entrance. They can only feel their way down step by step, and the pole-type ladder makes it unstable to step on, so it is not safe.

[0004] Therefore, this application provides an elevator pit ladder to solve the above problems. Utility Model Content

[0005] This application provides an elevator pit ladder, which aims to solve the existing problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: an elevator pit ladder, comprising at least two treads serving as steps, a folding frame disposed on both sides of the treads for switching the treads between vertical and horizontal states, a first hinge seat hinged at the top of the folding frame for mounting on the side wall of the elevator pit, and a folding push rod hinged to the same side wall below the folding frame via a second hinge seat and with its movable end hinged to the folding frame for driving the folding frame to fold, wherein the folding frame includes a limiting rod hinged to the first hinge seat, a driving rod with its top hinged to the first hinge seat and its middle section hinged to the movable end of the folding push rod, and a connecting side frame hinged to the limiting rod and the driving rod respectively, the connecting side frame being fixedly welded to both sides of the treads, and a limiting stop block for contacting the bottom end of the driving rod on the side of the bottom end of the limiting rod near the driving rod. In this way, the extension and retraction of the folding push rod drives the folding frame to either vertically retract or tilt and unfold, thereby enabling the pedal to switch between two states: folded and horizontally unfolded. Specifically, when the folding push rod extends, it pushes the drive rod, which is hinged to its movable end, to rotate around the first hinge seat. Since the connecting side frame is hinged to the limit rod and the drive rod respectively, and is fixedly welded to both sides of the pedal, the connecting side frame moves accordingly under the drive rod, causing the pedal to flip from a vertical state to a horizontal state. After the bottom end of the drive rod contacts the limit stop block, it continues to push the limit rod to flip together until the pedal is completely horizontal. When the folding push rod retracts, the drive rod rotates in the opposite direction, causing the connecting side frame to gradually flip the pedal from a horizontal state to a vertical state. At this time, the drive rod, the limit rod, and the pedal are all parallel to the side wall of the elevator pit, maintaining a vertical state to save space.

[0007] Preferably, the first hinge seat has a first rotating shaft rotatably connected to the limiting rod and a second rotating shaft rotatably connected to the driving rod, and the horizontal distance from the first rotating shaft to the side wall of the elevator pit is greater than the horizontal distance from the second rotating shaft to the side wall of the elevator pit.

[0008] Preferably, the widths of the limiting rod and the driving rod are equal, and the horizontal distance from the first rotating shaft to the second rotating shaft is greater than the widths of the limiting rod and the driving rod to leave sufficient space for the driving rod to preferentially push the connecting side frame to cause the pedal to flip to a horizontal position.

[0009] Preferably, the first hinge seat is bent and provided with a mounting plate on the side away from the folding frame, and the mounting plate has a plurality of mounting holes distributed in a linear array.

[0010] Preferably, the folding push rod is connected to an external control system.

[0011] This elevator pit ladder features a horizontal step, providing greater stability for users and avoiding the instability issues associated with pole-mounted ladders. Furthermore, the folding frame can be tilted and unfolded, exposing it to the user's view, improving visibility as they enter the pit and eliminating the need for cautious, step-by-step exploration, thus reducing safety risks associated with poor visibility.

[0012] When the elevator pit ladder is not in use, the steps can be driven by a folding rod to fold the frame into a vertical position, which fits tightly against the side wall of the elevator pit, without occupying pit space and without interfering with the installation and maintenance of other equipment. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a ladder in an elevator pit.

[0014] In the picture:

[0015] 1. Folding frame; 11. Limiting rod; 111. Limiting stop block; 12. Drive rod; 13. Linking side frame;

[0016] 2. Pedal;

[0017] 3. First hinge seat; 31. First rotating shaft; 32. Second rotating shaft; 33. Mounting plate; 331. Mounting hole;

[0018] 4. Folding push rod; 41. Second hinge seat. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] This embodiment provides a ladder for the elevator pit, such as... Figure 1As shown, the elevator pit ladder includes at least two steps 2 as steps, a folding frame 1 set on both sides of the steps 2 for switching between vertical and horizontal states, a first hinge seat 3 for mounting on the side wall of the elevator pit and a folding push rod 4 hinged to the top of the folding frame 1 at a position below the same side wall via a second hinge seat 41 and with its movable end hinged to the folding frame 1 for driving the folding frame 1 to fold. The folding frame 1 includes a limiting rod 11 hinged to the first hinge seat 3, a drive rod 12 with its top hinged to the first hinge seat 3 and its middle section hinged to the movable end of the folding push rod 4, and a connecting side frame 13 hinged to the limiting rod 11 and the drive rod 12 respectively. The connecting side frame 13 is fixedly welded to both sides of the steps 2. The bottom end of the limiting rod 11 near the drive rod 12 has a limiting stop block 111 for contacting the bottom end of the drive rod 12. The folding push rod 4 is connected to an external control system.

[0021] In use, the extension and retraction of the folding push rod 4 drives the folding frame 1 to either vertically retract or tilt and unfold, thereby switching the pedal 2 between folded and horizontally unfolded states. Specifically, when the folding push rod 4 extends, it pushes the drive rod 12, which is hinged to its movable end, to rotate around the first hinge seat 3. Since the connecting side frame 13 is hinged to both the limiting rod 11 and the drive rod 12 and is fixedly welded to both sides of the pedal 2, the connecting side frame 13 moves accordingly under the drive rod 12, causing the pedal 2 to flip from a vertical state to a horizontal state. After the bottom end of the drive rod 12 contacts the limiting block 111, it continues to push the limiting rod 11 to flip as well. Until the step 2 is completely horizontal; when the folding push rod 4 retracts, the drive rod 12 rotates in the opposite direction, driving the connecting side frame 13 to gradually flip the step 2 from a horizontal state to a vertical state. At this time, the drive rod 12, the limit rod 11, and the step 2 are all parallel to the side wall of the elevator pit, maintaining a vertical state to save space; the step 2 of this ladder can be in a horizontal state, making it more stable for people to step on, avoiding the problem of unstable stepping on pole-type ladders; at the same time, since the folding frame 1 can be tilted and unfolded when in use, it is exposed in the field of vision of personnel, and the personnel have a better field of vision when entering the pit, without having to test each step to go down the well, reducing the safety risk of going down the well due to poor visibility.

[0022] Specifically, the first hinge 3 has a first rotating shaft 31 rotatably connected to the limiting rod 11 and a second rotating shaft 32 rotatably connected to the drive rod 12. The horizontal distance from the first rotating shaft 31 to the side wall of the elevator pit is greater than the horizontal distance from the second rotating shaft 32 to the side wall of the elevator pit. By setting different horizontal distances, the structure of the folding frame 1 is made more reasonable, avoiding mutual interference between the limiting rod 11 and the drive rod 12 during the folding process. It can accurately realize the conversion between the vertical and horizontal states of the pedal 2, ensuring the normal functioning of the ladder.

[0023] Furthermore, the widths of the limiting rod 11 and the driving rod 12 are equal, and the horizontal distance from the first rotating shaft 31 to the second rotating shaft 32 is greater than the widths of the limiting rod 11 and the driving rod 12 to leave sufficient space for the driving rod 12 to prioritize pushing the connecting side frame 13, thereby causing the pedal 2 to flip to the horizontal position. When the folding push rod 4 pushes the driving rod 12 to rotate around the second rotating shaft 32, since the horizontal distance from the first rotating shaft 31 to the second rotating shaft 32 is greater than the widths of the limiting rod 11 and the driving rod 12, the driving rod 12 has enough space to move during rotation and will not be interfered with by the limiting rod 11. In this way, the driving rod 12 can prioritize pushing the connecting side frame 13, thereby causing the pedal 2 to flip to the horizontal position and realize the unfolding of the ladder.

[0024] Understandably, the first hinge 3 is bent and fitted with a mounting plate 33 on the side away from the folding frame 1. The mounting plate 33 has a number of mounting holes 331 arranged in a linear array. When installing the ladder, fasteners such as bolts are passed through the mounting holes 331 on the mounting plate 33 and fixed to the side wall of the elevator pit, thereby achieving a firm connection between the first hinge 3 and the side wall of the elevator pit. The linear array of mounting holes 331 provides multiple mounting points, making the installation more stable and reliable.

[0025] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A ladder for elevator pits, characterized in that: The system includes at least two steps (2) serving as stairs, a folding frame (1) located on both sides of the steps (2) for switching the steps (2) between vertical and horizontal states, a first hinge seat (3) hinged to the top of the folding frame (1) for mounting on the side wall of the elevator pit, and a folding push rod (4) hinged to the same side wall below the second hinge seat (41) and hinged at its movable end to the folding frame (1) for driving the folding frame (1) to fold. The folding frame (1) includes a hinged push rod (4) hinged to the first hinge seat (2) for mounting on the side wall of the elevator pit. The first hinge seat (3) has a limiting rod (11), a drive rod (12) with its top end hinged to the first hinge seat (3) and its middle section hinged to the movable end of the folding push rod (4), and a connecting side frame (13) that is hinged to the limiting rod (11) and the drive rod (12) respectively. The connecting side frame (13) is fixedly welded to both sides of the pedal (2). The bottom end of the limiting rod (11) near the drive rod (12) has a limiting stop (111) for contacting the bottom end of the drive rod (12).

2. The elevator pit ladder according to claim 1, characterized in that: The first hinge seat (3) has a first rotating shaft (31) rotatably connected to the limiting rod (11) and a second rotating shaft (32) rotatably connected to the driving rod (12). The horizontal distance from the first rotating shaft (31) to the side wall of the elevator pit is greater than the horizontal distance from the second rotating shaft (32) to the side wall of the elevator pit.

3. The elevator pit ladder according to claim 2, characterized in that: The widths of the limiting rod (11) and the driving rod (12) are equal. The horizontal distance from the first rotating shaft (31) to the second rotating shaft (32) is greater than the widths of the limiting rod (11) and the driving rod (12) to leave enough room for the driving rod (12) to push the connecting side frame (13) first, thereby causing the pedal (2) to flip to a horizontal position.

4. The elevator pit ladder according to claim 3, characterized in that: The first hinge (3) is bent on the side away from the folding frame (1) and a mounting plate (33) is provided. The mounting plate (33) has a plurality of mounting holes (331) arranged in a linear array.

5. The elevator pit ladder according to claim 4, characterized in that: The folding push rod (4) is connected to an external control system.

Images