Safety maintenance frame for elevator maintenance

Abstract

The utility model discloses a safety maintenance frame for elevator maintenance, which relates to the technical field of maintenance safety and comprises a fixing frame, the fixing frame is fixedly mounted at the top of an elevator shaft through bolts, an electric hoist is fixedly mounted at the center of the bottom surface of the fixing frame, a hook of the electric hoist is fixedly connected with a bearing component, and a moving component is slidably mounted in the bearing component. Four supporting assemblies are arranged on the circumference of the outer wall of the moving assembly at equal intervals. The sliding rod and the sliding sleeve are matched in a guiding mode, so that the movable plate can move stably in the vertical direction, reliable self-locking limiting of the position of the movable assembly is achieved in combination with a ratchet meshing structure formed by the ratchet bar and the ratchet block, and accidental rebounding after downward pressing is prevented; a connecting rod mechanism in the supporting assembly and a rubber-coated abutting plate are unfolded in a linkage mode, the supporting assembly can be stably attached to the four walls of the elevator shaft, the lateral supporting effect is enhanced, and the overall stability of the platform and the operation safety of operators during maintenance operation are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of maintenance safety technology, specifically a safety maintenance frame for elevator maintenance. Background Technology

[0002] As a crucial vertical transportation tool in high-rise buildings, elevators' operational safety and maintenance efficiency significantly impact the overall performance of the building. During routine maintenance, repair personnel typically need to enter the elevator shaft to inspect and adjust components such as the elevator car, guide rails, and limit devices. Due to the narrow space and complex structure of elevator shafts, traditional maintenance methods often rely on temporary scaffolding or external hoisting equipment. This is not only cumbersome and unstable but also poses significant safety hazards. Improper operation or structural instability can easily lead to falls, injuries, and other personal accidents.

[0003] In the existing technology, although some maintenance platforms have certain lifting functions and support structures, they generally have the following problems: First, the installation process is complicated, requiring multiple fixation points or relying on external facilities, resulting in poor flexibility of use; second, they lack effective self-locking and positioning mechanisms, making the platform prone to shaking and affecting operational stability; third, they have weak adaptability to different specifications of elevator shaft environments, and cannot be actively adjusted according to the shaft size, limiting their scope of use.

[0004] Therefore, there is a need for a maintenance support device that is simple in structure, reliable in positioning, safe in use, easy to assemble and disassemble, and adaptable to different elevator shaft sizes, so as to meet the safety and efficiency requirements of modern elevator maintenance operations.

[0005] A search revealed that the existing technology disclosure number CN212558950U discloses a safety maintenance frame for elevator maintenance, including a base mechanism, a maintenance platform mechanism, and a rear plate mechanism. This solution protects maintenance personnel while allowing them to observe the elevator and surrounding objects through the protective connecting columns on both sides. The suspension frame facilitates the hanging of the safety hooks on the safety belts worn by maintenance personnel. The counterweight blocks prevent the maintenance frame from tipping over due to the imbalance of gravity when the maintenance platform is raised. Furthermore, the counterweight blocks support the motor below the platform after it is lowered, preventing damage from impacts. Through the above operations, the existing problem of preventing maintenance personnel from being outside the elevator during elevator maintenance from potential accidents is solved.

[0006] Therefore, based on the above search and combined with existing technology, the existing safety maintenance frame for elevator maintenance has a relatively complex structure, which requires the combined use of multiple independent components, such as the rear plate mechanism, protective connecting column, and counterweight block. This is not conducive to quick disassembly and reuse, and it cannot adapt to elevator shafts of different widths or structures. Utility Model Content

[0007] The purpose of this utility model is to provide a safe maintenance frame for elevator maintenance, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A safety maintenance frame for elevator maintenance includes a fixed frame, which is fixedly installed on the top of the elevator shaft by bolts. An electric hoist is fixedly installed at the center of the bottom surface of the fixed frame. The hook of the electric hoist is fixedly connected to a support component. A movable component is slidably installed inside the support component. Four sets of support components are equidistantly arranged on the outer circumference of the movable component.

[0010] Furthermore, the supporting component includes a connecting plate, which is fixedly connected to the hook of the electric hoist.

[0011] Furthermore, sliding rods are fixedly welded at the four corners of the bottom surface of the connecting plate, and the bottom ends of the four sliding rods are connected to a support plate. Four sliding sleeves are equidistantly provided on the top circumference of the support plate.

[0012] Furthermore, the movable component includes a movable plate, and sleeves are fixedly installed at the four corners of the top surface of the movable plate. The four sleeves are slidably sleeved on the outer walls of the four sliding rods.

[0013] Furthermore, the top surface of the movable plate is provided with a slot for insertion, and a ratchet is slidably inserted into the slot. The bottom end of the ratchet is fixed to the top surface of the support plate by bolts. The top surface of the movable plate is provided with a plate for insertion, and a ratchet block is slidably inserted into the plate. Two smooth rods are welded and fixed to the right end of the ratchet block, and the ratchet block engages with the ratchet.

[0014] Furthermore, a first spring is fitted onto the outer wall of each of the two smooth rods, and a second spring is fixedly installed on the bottom surface of the movable plate, with the bottom end of the second spring fixedly connected to the top surface of the support plate.

[0015] Furthermore, the support assembly includes a first connecting rod, and a connecting shaft is provided in the middle of the four side walls of the movable plate. The first connecting rods of the four sets of support assemblies are respectively hinged to the four connecting shafts. The end of the first connecting rod away from the connecting shaft is hinged to a second connecting rod. The second connecting rod is slidably inserted into the inner wall of the sliding sleeve. The end of the second connecting rod away from the first connecting rod is hinged to an abutment plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In use, this utility model securely mounts the fixing frame to the top of the elevator shaft with bolts, and forms a rigid connection with the elevator shaft steel frame using a positioning plate, effectively improving the overall fixing strength and structural safety of the device. The electric hoist and connecting plate work together to achieve vertical lifting of the maintenance frame, simplifying the construction process. The guide mechanism between the sliding rod and the sliding sleeve allows the moving plate to move smoothly in the vertical direction. Combined with the ratchet meshing structure formed by the ratchet rack and ratchet block, reliable self-locking and limiting of the moving component's position is achieved, preventing accidental rebound after downward pressure. The linkage mechanism in the support component and the rubber-coated abutment plate unfold in conjunction, allowing it to firmly adhere to the four walls of the elevator shaft. By pulling the pull rod to release the ratchet limiting, the second spring automatically resets the moving plate, driving the first and second linkages to retract in conjunction. The support component simultaneously detaches from the elevator shaft wall, achieving rapid unlocking and removal of the support system. This process eliminates the need for complex disassembly, improving operational efficiency and reusability during maintenance work. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded view of the overall structure of this utility model;

[0020] Figure 3 This is an exploded view of the support component structure of this utility model;

[0021] Figure 4 This is an exploded view of the mobile component structure of this utility model;

[0022] Figure 5 This is an exploded view of the support component structure of this utility model.

[0023] In the picture:

[0024] 1. Fixing frame; 11. Positioning plate;

[0025] 2. Electric hoist;

[0026] 3. Supporting components; 31. Connecting plate; 311. Slide rod; 32. Supporting plate; 321. Slide sleeve;

[0027] 4. Moving component; 41. Moving plate; 411. Sleeve; 412. Connecting shaft; 413. Insert plate; 42. Ratchet; 43. Ratchet block; 44. First spring; 45. Second spring;

[0028] 5. Support assembly; 51. First link; 52. Second link; 53. Abutment plate. Detailed Implementation

[0029] 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.

[0030] Example 1: Please refer to Figures 1-3 A safety maintenance frame for elevator maintenance includes a fixed frame 1, which is fixedly installed on the top of the elevator shaft by bolts. Specifically, positioning plates 11 are welded and fixed to both the left and right ends of the fixed frame 1. The positioning plates 11 are fixedly connected to the steel frame at the top of the elevator shaft by bolts, thereby completing the installation of the fixed frame 1. An electric hoist 2 is fixedly installed at the center of the bottom surface of the fixed frame 1. The hook of the electric hoist 2 is fixedly connected to a support component 3. A movable component 4 is slidably installed inside the support component 3. Four sets of support components 5 are equidistantly arranged on the outer circumference of the movable component 4. Specifically, the support components 5 support the four walls of the elevator shaft.

[0031] The supporting component 3 includes a connecting plate 31, which is fixedly connected to the hook of the electric hoist 2. Specifically, the top surface of the connecting plate 31 is provided with a connecting ring, which is fixedly connected to the hook of the electric hoist 2. Slide rods 311 are fixedly welded at the four corners of the bottom surface of the connecting plate 31. The bottom ends of the four slide rods 311 are connected to the supporting plate 32. The top surface of the supporting plate 32 is provided with four sliding sleeves 321 at equal intervals.

[0032] Example 2: Please refer to Figures 2-5A safety maintenance frame for elevator maintenance differs from Embodiment 1 in that the movable component 4 includes a movable plate 41. Sleeves 411 are fixedly installed at the four corners of the top surface of the movable plate 41. The four sleeves 411 are slidably fitted onto the outer walls of four sliding rods 311. Specifically, the movable plate 41 can slide up and down along the outer walls of the four sliding rods 311. An insertion groove is provided on the top surface of the movable plate 41, and a ratchet rack 42 is slidably inserted into the groove. The bottom end of the ratchet rack 42 is fixedly installed on the top surface of the support plate 32 by bolts. An insertion plate 413 is provided on the top surface of the movable plate 41, and a ratchet block 43 is slidably inserted into the insertion plate 413. The right end face of the ratchet block 43 is welded and fixed with... Two optical rods are connected by a ratchet block 43 and a ratchet rack 42. Specifically, the right end face of the insertion plate 413 has two through-holes. The two optical rods are slidably inserted into the inner walls of the two insertion holes. The outer walls of the two optical rods are fitted with a first spring 44. Specifically, the first spring 44 provides a leftward elastic force to the ratchet block 43, so that the ratchet block 43 and the ratchet rack 42 are engaged. The rear end faces of the two optical rods are provided with a blocking plate to prevent the two optical rods from falling out of the insertion plate 413. A pull rod is provided behind the blocking plate. A second spring 45 is fixedly installed on the bottom surface of the moving plate 41. The bottom end of the second spring 45 is fixedly connected to the top surface of the support plate 32.

[0033] Support assembly 5 includes a first connecting rod 51. Connecting shafts 412 are provided in the middle of the four side walls of the moving plate 41. The first connecting rods 51 of the four sets of support assemblies 5 are respectively hinged to the four connecting shafts 412. A second connecting rod 52 is hinged to the end of the first connecting rod 51 away from the connecting shaft 412. The second connecting rod 52 is slidably inserted into the inner wall of the sliding sleeve 321. Specifically, the inner wall size of the sliding sleeve 321 is adapted to the outer wall size of the second connecting rod 52. An abutment plate 53 is hinged to the end of the second connecting rod 52 away from the first connecting rod 51. Specifically, several rubber strips for increasing friction are equidistantly bonded to the end face of the abutment plate 53 away from the second connecting rod 52. When the electric hoist 2 lowers the supporting assembly 3 and the moving assembly 4 to the designated height in the elevator shaft, the electric hoist 2 stops working. The worker steps on the moving plate 41, compressing the second connecting rod 52. Spring 45 and moving plate 41 drive second connecting rod 52 to move within the inner wall of sliding sleeve 321 via four first connecting rods 51 until the abutment plates 53 at the ends of the four second connecting rods 52 are in contact with the inner wall of the elevator shaft. This allows them to adapt to elevator shafts with different inner diameters, thereby stabilizing the position of the support plate 32 and facilitating maintenance work. During the downward movement of moving plate 41, ratchet 42 moves within the insertion slot, and ratchet block 43 engages with ratchet 42 to fix the position of moving plate 41. When maintenance work is completed, simply pull the lever to compress the first spring 44, causing the ratchet block 43 to disengage from ratchet 42. The second spring 45 releases its elasticity to reset moving plate 41, and moving plate 41 drives the four sets of support components 5 to retract, thus completing the disengagement from the inner wall of the elevator shaft.

[0034] Working principle: When using this device, the fixing frame 1 is first installed on the steel frame at the top of the elevator shaft with bolts. The positioning plate 11 is used to enhance the installation stability. An electric hoist 2 is installed on the bottom surface of the fixing frame 1. Its hook is fixedly connected to the connecting plate 31 on the support component 3. Thus, the lifting and lowering control of the entire maintenance frame system is realized through the electric hoist 2. Four sliding rods 311 are welded to the lower part of the connecting plate 31 and are connected to the support plate 32. The support plate 32 is provided with a sliding sleeve 321 for guiding the movement of the moving component 4.

[0035] The movable component 4 is composed of a movable plate 41, which is slidably engaged with a slide rod 311 via four sleeves 411, allowing it to move up and down vertically. The top surface of the movable plate 41 is provided with an insertion groove, into which a ratchet rack 42 is vertically inserted and fixed to the top surface of the support plate 32. A ratchet block 43 is slidably installed in the insertion plate 413, and two smooth rods are welded to the right end of the ratchet block 43. The smooth rods slide through the insertion hole and engage with the ratchet rack 42 under the action of the first spring 44, thereby achieving self-locking of the position of the movable plate 41.

[0036] During maintenance, the electric hoist 2 lowers the supporting component 3 along with the moving component 4 to a designated height in the elevator shaft. The operator steps on the moving plate 41, which compresses the second spring 45 and drives the four first connecting rods 51 to swing downwards. This, in turn, pushes the second connecting rod 52 to slide in the sliding sleeve 321 until the abutment plate 53 presses against the inner wall of the elevator shaft. The abutment plate 53 is equipped with a rubber strip to enhance the friction between it and the elevator shaft wall, ensuring that the maintenance frame is stable and reliable. During this process, the ratchet block 43 and the ratchet rack 42 continuously mesh to ensure that the moving plate 41 is stable after being pressed down.

[0037] After maintenance is completed, pulling the lever compresses the first spring 44, disengaging the ratchet block 43 from the ratchet rack 42. The second spring 45 regains its elasticity, pushing the moving plate 41 upward and resetting the first connecting rod 51 and the second connecting rod 52. The support assembly 5 then retracts, and the abutment plate 53 disengages from the inner wall of the elevator shaft, completing the recovery of the equipment and thus achieving a safe and efficient elevator maintenance support function. At this point, the operation of this device is complete.

[0038] 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 scope of the technology 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 maintenance frame for elevator maintenance, comprising a fixing frame (1), characterized in that: The fixed frame (1) is fixedly installed on the top of the elevator shaft by bolts. An electric hoist (2) is fixedly installed at the center of the bottom surface of the fixed frame (1). The hook of the electric hoist (2) is fixedly connected to a support component (3). A moving component (4) is slidably installed inside the support component (3). Four sets of support components (5) are equidistantly arranged on the outer circumference of the moving component (4).

2. The safety maintenance frame for elevator maintenance according to claim 1, characterized in that: The supporting component (3) includes a connecting plate (31), which is fixedly connected to the hook of the electric hoist (2).

3. The safety maintenance frame for elevator maintenance according to claim 2, characterized in that: The connecting plate (31) has sliding rods (311) fixedly welded at the four corners of the bottom surface. The bottom ends of the four sliding rods (311) are connected to the support plate (32). The support plate (32) has four sliding sleeves (321) equidistantly arranged on the top circumference of the top surface.

4. The safety maintenance frame for elevator maintenance according to claim 3, characterized in that: The moving component (4) includes a moving plate (41), and sleeves (411) are fixedly installed at the four corners of the top surface of the moving plate (41). The four sleeves (411) are slidably sleeved on the outer walls of the four sliding rods (311).

5. A safety maintenance frame for elevator maintenance according to claim 4, characterized in that: The top surface of the movable plate (41) is provided with a slot for insertion. A ratchet (42) is slidably inserted into the slot. The bottom end of the ratchet (42) is fixedly installed on the top surface of the support plate (32) by bolts. The top surface of the movable plate (41) is provided with a plate (413). A ratchet block (43) is slidably inserted into the plate (413). Two light rods are welded and fixed on the right end face of the ratchet block (43). The ratchet block (43) meshes and engages with the ratchet (42).

6. A safety maintenance frame for elevator maintenance according to claim 5, characterized in that: Both of the light rods are fitted with a first spring (44) on their outer walls, and a second spring (45) is fixedly installed on the bottom surface of the moving plate (41). The bottom end of the second spring (45) is fixedly connected to the top surface of the support plate (32).

7. A safety maintenance frame for elevator maintenance according to claim 1, characterized in that: The support assembly (5) includes a first connecting rod (51), and a connecting shaft (412) is provided in the middle of the four side walls of the movable plate (41). The first connecting rod (51) of the four sets of support assemblies (5) is hinged to the four connecting shafts (412) respectively. The end of the first connecting rod (51) away from the connecting shaft (412) is hinged to a second connecting rod (52). The second connecting rod (52) is slidably inserted into the inner wall of the sliding sleeve (321). The end of the second connecting rod (52) away from the first connecting rod (51) is hinged to an abutment plate (53).

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