A non-fixed pit ladder climbing device

Abstract

The utility model relates to a non-fixed type pit crawling ladder device relates to elevator technology field, aims at solving the problem of fixed crawling ladder invading car space and no safety protection, it includes the crawling ladder, the bottom of the crossbeam middle section of crawling ladder is fixed with the switch guide support of upside down U type, the switch guide support bottom is fixed with the pin switch, the lower mounting bracket of Z type upper mounting bracket is equipped on the shaft wall from top to bottom, the lower mounting bracket is equipped with the guide opening for the switch guide support to pass through, the contactor support of the opening lower part is fixed with the switch contactor of pin switch adaptation, and the switch contactor is connected in series elevator emergency stop circuit. When not using the crawling ladder, the crawling ladder is placed on the lower mounting bracket of upper mounting bracket, and the pin switch is conducted with the switch contactor, and the elevator normally operates, when using the crawling ladder, the switch is opened by taking down the crawling ladder, and the elevator is powered off. The utility model does not need to increase the shaft size, and can guarantee the maintenance safety, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and specifically to a non-fixed pit climbing ladder device. Background Technology

[0002] Elevator pits typically contain equipment such as buffer seats, tensioning devices, and guide rails. According to Article 31 of the "Special Equipment Safety Supervision Regulations" and the bi-weekly maintenance requirements of the "Elevator Maintenance Rules," elevators should be cleaned, lubricated, adjusted, and inspected at least every 15 days. Each bi-weekly maintenance must include maintenance of the pit environment and pit stop devices. Furthermore, according to TSG T5002-2017 "Elevator Maintenance Rules," self-inspections, supervisory inspections, and periodic inspections of elevators also require access to the pit. To facilitate maintenance personnel's access to the pit for inspection and maintenance of these devices, ladders are provided for their entry and exit.

[0003] Most existing elevators use ladders that are vertically fixed to the side wall of the pit entrance / exit. However, industry standards stipulate the required distance between the ladder and the shaft wall. Therefore, such ladders protrude from the shaft wall, encroaching on the car's operating space and posing a risk of interference with the car and its accessories. This necessitates increasing the shaft size to avoid interference, leading to increased costs and reduced product competitiveness. Furthermore, when using non-fixed pit ladders, there is a risk of the hall door accidentally closing, causing the elevator to operate and the car to collide with the ladder as it descends, resulting in a safety accident. Utility Model Content

[0004] The purpose of this invention is to solve the problems of fixed ladders encroaching on the operating space and the lack of safety switches in non-fixed pits. The invention is a non-fixed pit ladder device. The key is to install a contact switch on the pit ladder. When no one is using the ladder, it hangs on the support on the shaft wall, and the contact switch is open. When maintenance personnel use the elevator, they need to take the ladder down from the shaft wall, which breaks the circuit and cuts off the power to the entire elevator system. This type of ladder can avoid fixed ladders occupying shaft space and further protect personnel safety.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a non-fixed pit climbing ladder device, including a climbing ladder, characterized in that: a switch guide bracket is fixedly installed at the bottom of a crossbeam in the middle section of the climbing ladder, and a downwardly extending pin switch is installed at the bottom of the switch guide bracket; On the shaft wall on one side of the pit, upper and lower mounting brackets for placing ladders are arranged sequentially from top to bottom; a guide opening is provided on the lower mounting bracket to allow the switch guide bracket to pass through; a contactor bracket connected to the lower mounting bracket is provided at the lower part of the opening; and a switch contactor that cooperates with the pin switch is provided on the contactor bracket.

[0006] Furthermore, the upper mounting bracket and the lower mounting bracket have a Z-shaped structure; the length of the upper mounting bracket and the lower mounting bracket is less than the length of the ladder's crossbeam.

[0007] Furthermore, the switch guide bracket has an inverted U-shaped structure; the pin switch is disposed within the U-shaped structure.

[0008] The beneficial effects and features of this utility model are as follows: The advantage of this invention lies in the installation of a contact switch on the pit ladder. When the ladder is not in use, it hangs tightly against the shaft wall support, the contact switch is open, and the elevator system operates normally. When maintenance personnel use the elevator, they need to remove the ladder from the shaft wall, thus breaking the contact switch and cutting off power to the entire elevator system. This non-fixed ladder, hanging tightly against the shaft wall support, occupies less space in the shaft compared to a fixed ladder. During the use of the non-fixed ladder, the installation of the contact switch further provides protection, preventing the ladder from colliding with the car. Attached Figure Description

[0009] Figure 1 This is a simplified schematic diagram of the present invention in the state where the ladder is not in use; Figure 2 This is a simplified schematic diagram illustrating the use of the ladder in this utility model. Figure 3 This is a simplified schematic diagram of part of the structure of this utility model; Figure 4 This is a simplified schematic diagram of part of the structure of this utility model; Figure 5 This is a schematic diagram of a portion of the structure of this utility model in its unused ladder configuration.

[0010] The main components in the diagram are numbered as follows: 1. Shaft wall; 2. Pit entrance / exit; 3. Ladder; 4. Upper mounting bracket; 5. Lower mounting bracket; 501. Guide opening; 6. Switch guide bracket; 7. Pin switch; 8. Switch contactor; 9. Contactor bracket; 10. Expansion bolt; 11. Screw.

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and the other drawings obtained are all within the protection scope claimed by this utility model. Detailed Implementation

[0012] The following combination Figure 1-5 The contents of this utility model will be described in detail through specific embodiments. Example

[0013] A non-fixed pit climbing ladder device includes a climbing ladder 3, wherein: a switch guide bracket 6 is fixedly installed at the bottom of a crossbeam at the middle section of the climbing ladder, and a downwardly extending pin switch 7 is installed at the bottom of the switch guide bracket. On the shaft wall 1 on one side of the pit, upper mounting brackets 4 and lower mounting brackets 5 are sequentially installed from top to bottom for placing ladders. The upper and lower mounting brackets are connected and fixed to the shaft wall by expansion bolts 10. A guide opening 501 is provided on the lower mounting bracket to allow a switch guide bracket to pass through. A contactor bracket 9, connected to the lower mounting bracket, is provided below the opening and is fixed to the lower mounting bracket by welding. A switch contactor 8, which mates with a pin switch, is provided on the contactor bracket and is connected to the contactor bracket by screws 11.

[0014] Preferably, both the upper and lower mounting brackets are Z-shaped bending structures with a bending angle of 90°. After the upper part of the upper and lower mounting brackets is fixed to the shaft wall, a U-shaped groove is formed. This groove is used to place the ladder crossbeam, allowing the ladder to be placed on the shaft wall. The lengths of both the upper and lower mounting brackets are less than the length of the ladder crossbeam, ensuring that the ladder does not extend beyond the edge of the brackets after placement.

[0015] Preferably, the switch guide bracket has an inverted U-shaped structure, and the pin switch is disposed inside the U-shaped structure. The U-shaped structure is used to protect the pin switch from collision and damage when the ladder is placed on the lower mounting bracket.

[0016] The usage process of this utility model: When the elevator is running normally, the ladder is placed on the shaft wall of the pit via the upper and lower mounting brackets.

[0017] When pit maintenance is required, maintenance personnel first open the hall door. Simultaneously, the hall door's primary protection device de-energizes the entire elevator system, keeping the elevator stationary. Then, maintenance personnel remove the ladder from the shaft wall at pit entrance / exit 2 and descend into the pit for maintenance. As the ladder and lower mounting bracket are removed, the pin swivel disconnects from the contactor, and the secondary protection device further de-energizes the elevator, preventing it from resuming operation should the hall door close accidentally.

[0018] After the maintenance is completed, the maintenance personnel climb the ladder to the pit entrance and place the ladder in the upper and lower mounting brackets. The pin switch is disconnected from the contactor, and the secondary protection device is de-energized. After the hall door is closed, the primary protection device is de-energized, and the elevator operates normally.

Claims

1. A non-fixed pit climbing ladder device, comprising a climbing ladder, characterized in that: A switch guide bracket is fixedly installed at the bottom of a crossbeam in the middle of the ladder, and a downward-extending pin switch is installed at the bottom of the switch guide bracket. On the shaft wall on one side of the pit, upper and lower mounting brackets for placing ladders are arranged sequentially from top to bottom; a guide opening is provided on the lower mounting bracket to allow the switch guide bracket to pass through; a contactor bracket connected to the lower mounting bracket is provided at the lower part of the opening; and a switch contactor that cooperates with the pin switch is provided on the contactor bracket.

2. The non-fixed pit climbing ladder device according to claim 1, characterized in that: The upper and lower mounting brackets are Z-shaped structures; the lengths of the upper and lower mounting brackets are less than the length of the ladder's crossbeam.

3. The non-fixed pit ladder device according to claim 1, characterized in that: The switch guide bracket has an inverted U-shaped structure; the pin switch is disposed within the U-shaped structure.

Images