Old elevator reconstruction protection device

Abstract

The utility model discloses an old elevator reconstruction protection device relates to special equipment field, and movable arm is installed on the main shaft and is limited maximum activity angle through the safety lock, makes it can rely on floor transition beam or well structure to form reliable bracing force after unfolding. The shaft seat that can slide between the vertical guide rail is arranged on the clamping frame of the both ends of main shaft, and the lock rod is fixed on the shaft seat, and the adjusting screw on the crossbeam is used for limiting the sliding stroke of shaft seat, thereby controlling the minimum included angle of movable arm, to adapt to different well mouth or well width. The device can expand and adhere to the wall body to form stable support through movable arm in the well when using, and the safety rope can be fixed through the binding frame to avoid swing displacement, when operating in the well mouth, the angle of movable arm is locked through the adjusting screw, and it is stably supported in the diagonal position of the hole. The overall structure can be folded, and it is convenient to carry, can be quickly arranged and provide reliable and safe protection under different scenes.

Description

Technical Field

[0001] This utility model relates to the field of special equipment, and in particular to a protective device for the renovation of old elevators. Background Technology

[0002] The optimized answer: Existing older elevators commonly rely on temporary locking hooks or supports inside the shaft for personnel safety during maintenance or renovation. However, these fixed components are mostly metal parts directly anchored to the shaft wall or structural members. Long-term exposure to damp, dusty environments can easily lead to corrosion and material fatigue, causing them to loosen and detach under stress, thus posing a risk of falls. Furthermore, traditional triangular support structures rely on stable stress points. When workers or safety ropes swing near the shaft opening, the support structure may shift due to stress, causing its support end to enter the shaft opening area, thereby rendering the shaft opening protection ineffective.

[0003] Existing equipment generally has a fixed, non-foldable structure, making it difficult to carry and move or deploy in narrow shafts. Furthermore, it often requires re-drilling or re-anchoring based on site conditions, resulting in low construction efficiency and safety significantly affected by installation quality. Regarding the need for flexible adjustments based on changes in shaft width and working direction during shaft operations, traditional support components typically lack controllable tension or adjustable angle structures, failing to adapt to different shaft sizes and leading to insufficient support stability. Existing protective devices often lack dedicated support structures for floor transition beams, failing to reliably utilize beam protrusions to form stable fulcrums. This makes shaft protection deployment more reliant on manual binding and temporary reinforcement methods, resulting in insufficient safety redundancy. Utility Model Content

[0004] The purpose of this utility model is to propose a protective device for the renovation of old elevators, in order to solve the problem of serious aging and safety hazards during construction of traditional old elevators.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a protective device for the renovation of old elevators, including a main shaft, on which a plurality of movable arms are movably connected, and on each movable arm are fixed a safety lock that mutually limits the maximum angle of movement; The main shaft is fixed with a bracket at each end, and a shaft seat slides vertically on the bracket. A locking rod is fixed on both shaft seats. A crossbeam is provided above the shaft seat, and an adjusting screw that limits the sliding stroke of the shaft seat is threaded through the crossbeam.

[0006] As a further description of the above technical solution: the movable arms move symmetrically in pairs on one side of the main shaft, and the main shaft is fixed with a binding frame spaced apart from adjacent movable arms.

[0007] As a further description of the above technical solution: the safety lock is fixed at the opposite ends of the two movable arms, and the two safety locks on the same side are staggered.

[0008] As a further description of the above technical solution: the bottom of the crossbeam is fixed with two vertical guide rails, and both vertical guide rails are fixed on the bracket.

[0009] As a further description of the above technical solution: the bearing seat slides between two vertical guide rails, and handles are fixed on both sides of the card holder.

[0010] As a further description of the above technical solution: the movable arm is scissor-shaped, with a maximum interior angle of less than 160° and a minimum interior angle of 30°.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: When this solution is in use, it can be installed with safety protection during the renovation of the elevator shaft, avoiding the safety hazards caused by the aging and detachment of traditional locking hooks fixed in the elevator shaft. One aspect of this solution involves widening the angle between the two movable arms by installing them on the beam protrusion in the floor transition area. This allows them to be easily folded and brought into the elevator shaft. When unfolded, the widened angle accommodates the width of the elevator shaft and allows them to be installed on the beam protrusion at the floor transition position. At this point, they are fixed to the binding frame by slings. Due to gravity, the movable arms are subjected to downward pressure, causing them to continuously expand to both sides and compress the wall, ensuring a tight fit in the floor transition area. This avoids the safety hazards caused by the failure of the binding position of the traditional safety rope. Furthermore, the overall structure is foldable, simple, reliable, and easy to use and install. When working inside an elevator shaft using a safety rope lowered through the opening, the original triangular support is prone to uncontrolled swinging of personnel and the safety rope, potentially causing displacement at the opening and displacement of the movable arm. This could result in the support entering the opening, creating a hazard. To address this, the support is reversed and installed at the opening, with the safety rope then secured to the binding frame. By adjusting the screws on both sides according to the opening size, the movement of the screws compresses the space of the shaft seat, reducing the displacement distance of the locking rod and increasing the minimum angle controlling the movable arm. This allows the movable arm to be supported by the inclined surfaces on both sides of the opening, maintaining stability. Ideally, the support should be positioned diagonally across the opening, ensuring a stable and safe protective state.

[0012] The above method can ensure safety in elevator shaft scenarios. The overall structure is simple, the mode can be switched as needed, it is reliable, easy to carry, and convenient for use in small spaces. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram from another perspective of the present invention; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the structure related to the movable arm of this utility model.

[0014] Legend: 1. Spindle; 2. Movable arm; 3. Safety lock; 4. Binding bracket; 5. Card holder; 6. Crossbeam; 7. Vertical guide rail; 8. Shaft seat; 9. Locking rod; 10. Adjusting screw; 11. Handle. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 - Figure 4 As shown, the present invention provides a protective device for the renovation of old elevators, including a main shaft 1, a plurality of movable arms 2 movably connected to the main shaft 1, and safety locks 3 that mutually limit the maximum angle of movement on the movable arms 2. The main shaft 1 is fixed with a bracket 5 at both ends. A shaft seat 8 slides vertically on the bracket 5. A locking rod 9 is fixed on both shaft seats 8. A crossbeam 6 is provided above the shaft seat 8, and an adjusting screw 10 that limits the sliding stroke of the shaft seat 8 is threaded through the crossbeam 6.

[0017] This solution utilizes a scissor-type linkage structure between the movable arm 2 and the main shaft 1. After deployment, gravity automatically expands the movable arm 2 outward, creating continuous external support against the shaft wall. This avoids the detachment caused by corrosion or aging that occurs with traditional fixed locking points, thus fundamentally improving the safety of operations inside the shaft. Based on the beam protrusion, the angle of the deployed movable arm 2 automatically adapts to the shaft width, achieving a stable fit through the structure's own expansion force. This eliminates the need for drilling holes or additional anchoring within the shaft, resulting in higher safety redundancy.

[0018] Its binding frame 4 is set between adjacent movable arms 2, so that the safety rope can be fixed within the same structural system. Through force transmission, it avoids the hidden danger of the entire support structure shifting due to the swing of the traditional rope. In the wellhead operation scenario, the adjusting screw 10 can limit the sliding stroke of the bearing 8, so that the minimum included angle of the control locking rod 9 driving the movable arm 2 can be increased, forming a controllable support angle to adapt to different wellhead sizes, and make the movable arm 2 stably abut against the diagonal of the wellhead, achieving higher anti-sway capability and anti-displacement performance.

[0019] Furthermore, the staggered arrangement of the safety locks 3 limits the maximum angle of movement of the movable arm 2, ensuring clear limits during folding and unfolding, thus improving the overall structural stability. The combination of the bracket 5, vertical guide rail 7, and shaft seat 8 ensures that the locking rod 9 maintains precise guidance under stress, enhancing local anti-deviation capability. The overall structure is foldable and compact, making it easy to carry and deploy in narrow shafts. It can switch between different working modes at beams and shaft openings as needed on site, achieving integrated, multi-scenario applicable safety protection. Overall, this solution combines the advantages of self-adaptive bracing, anti-sway, foldability, adjustable angle, and structural limit protection, significantly improving the safety and reliability of old elevator renovation and shaft operations.

[0020] Specifically, such as Figure 2 As shown, the movable arms 2 move symmetrically in pairs on one side of the main shaft 1, and the main shaft 1 is fixed with a binding frame 4 spaced apart from adjacent movable arms 2.

[0021] By setting up the binding frame 4, the two pairs of movable arms 2 can be restricted and kept away from each other's supports, while also facilitating the connection of one end of the sling.

[0022] Specifically, such as Figure 4 As shown, the safety lock 3 is fixed at the opposite ends of the two movable arms 2, and the two safety locks 3 on the same side are staggered.

[0023] By setting the safety lock 3, the maximum range of motion of the movable arm 2 can be limited, preventing the range of motion of the movable arm 2 from exceeding the maximum inner angle limit and ensuring safety. At the same time, the staggered setting of the safety lock 3 allows them to move relative to each other without their trajectories interfering with each other.

[0024] Specifically, such as Figure 3 As shown, the bottom of the crossbeam 6 is fixed with two vertical guide rails 7, and both vertical guide rails 7 are fixed on the bracket 5.

[0025] The bearing seat 8 slides between two vertical guide rails 7, and handles 11 are fixed on both sides of the bracket 5.

[0026] By setting the bearing 8, it can slide within the vertical guide rail 7, maintaining vertical sliding and improving stability.

[0027] The handle 11 is designed to facilitate gripping, pulling, and other manipulations.

[0028] Specifically, such as Figure 1 As shown, the movable arm 2 is arranged in a scissor shape, with a maximum interior angle of less than 160° and a minimum interior angle of 30°.

[0029] The scissor-shaped design of the movable arm 2 allows it to expand outwards when under pressure, making full use of its gravity to convert into compressive force against the wall, thus improving safety and stability. The maximum inner angle is designed to prevent tipping and improve safety, while the minimum inner angle allows for easy carrying and convenient use in confined spaces.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A safety device for retrofitting old elevators, including a main shaft (1), characterized in that: A number of movable arms (2) are movably connected to the main shaft (1), and a safety lock (3) that limits the maximum range of motion of each other is fixed on the movable arm (2). The main shaft (1) is fixed with a bracket (5) at both ends. A shaft seat (8) slides vertically on the bracket (5). A locking rod (9) is fixed on both shaft seats (8). A crossbeam (6) is provided above the shaft seat (8). An adjusting screw (10) that limits the sliding stroke of the shaft seat (8) is threaded through the crossbeam (6).

2. The protective device for retrofitting old elevators according to claim 1, characterized in that, The movable arms (2) move symmetrically in pairs on one side of the main shaft (1), and the main shaft (1) is fixed with a binding frame (4) spaced apart from an adjacent set of movable arms (2).

3. The protective device for retrofitting old elevators according to claim 1, characterized in that, The safety lock (3) is fixed at the opposite ends of the two movable arms (2), and the two safety locks (3) on the same side are staggered.

4. The protective device for retrofitting old elevators according to claim 1, characterized in that, The bottom of the crossbeam (6) is fixed with two vertical guide rails (7), and both vertical guide rails (7) are fixed on the bracket (5).

5. The protective device for retrofitting old elevators according to claim 4, characterized in that, The bearing seat (8) slides between two vertical guide rails (7), and handles (11) are fixed on both sides of the bracket (5).

6. The protective device for retrofitting old elevators according to claim 1, characterized in that, The movable arm (2) is scissor-shaped, with a maximum interior angle of less than 160° and a minimum interior angle of 30°.

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