Foldable buffering device suitable for elevator shaft top layer height insufficiency

Abstract

The utility model discloses a foldable buffer device suitable for elevator hoistway top layer height insufficiency, which comprises a foldable metal frame and a detection switch, the foldable metal frame comprises two upright posts and a support beam, the two upright posts are fixed in a bottom pit of an elevator hoistway in a bilateral symmetry manner, and the support beam is fixed in the bottom pit of the elevator hoistway. One end of the supporting beam is rotatably connected with the top end of one stand column through a rotating shaft; the detection switch is arranged at the top end of the other stand column through a support. An energy absorption composite layer is arranged in the middle of the supporting beam. In a non-working state, the supporting beams are vertically located at the top ends of the stand columns connected with the supporting beams after being folded. In a working state, the supporting beam is transversely arranged and bridged at the top ends of the two stand columns after being unfolded. The foldable buffering device suitable for the insufficient height of the top layer of the elevator shaft is small in occupied space, high in response speed and capable of dynamically adapting to the position of a lift car, the height space of the top layer of a maintainer is guaranteed, and the top rushing risk caused by the insufficient height of the top layer is avoided.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety technology, specifically to a foldable buffer device suitable for elevator shaft top floor height that is insufficient. Background Technology

[0002] In the existing technology, insufficient height at the top of the elevator shaft can lead to insufficient buffer distance when the elevator car hits the top, posing a safety hazard, such as impact with the top of the shaft or failure of the buffer.

[0003] Existing solutions mostly involve increasing the shaft height or using fixed hydraulic dampers, but these solutions have the following problems:

[0004] (1) High construction cost: Shaft modification requires damage to the building structure, which is time-consuming and expensive;

[0005] (2) Space constraints: Some old buildings cannot meet the requirements through physical renovation;

[0006] (3) Complex maintenance: Fixed buffer devices occupy permanent space and are difficult to adjust dynamically. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a foldable buffer device suitable for elevator shafts with insufficient top floor height. It has a small space occupation, fast response speed, and can dynamically adapt to the position of the car. This device is set at the bottom of the elevator shaft pit, supports the counterweight, and the traction force disappears, so the car will no longer move upward. In this working condition, it is equivalent to supporting the car, ensuring the top floor height space for maintenance personnel and solving the risk of overshoot caused by insufficient top floor height.

[0008] The technical solution to achieve the above objective is: a foldable buffer device suitable for elevator shaft top floor height shortages, comprising a foldable metal frame and a detection switch, wherein:

[0009] The foldable metal frame includes two columns and a support beam. The two columns are fixed symmetrically to the bottom of the elevator shaft. One end of the support beam is rotatably connected to the top of one of the columns via a pivot. The detection switch is mounted on the top of the other column via a bracket.

[0010] An energy-absorbing composite layer is provided in the middle of the supporting beam;

[0011] In the non-working state, the support beam is folded and located vertically at the top of the column it is connected to; in the working state, the support beam is unfolded and positioned horizontally, spanning the tops of the two columns.

[0012] The aforementioned foldable buffer device is suitable for elevator shafts with insufficient top floor height, wherein, in the working state, the distance between the support beam and the bottom end of the elevator shaft is ≥1.0m.

[0013] The aforementioned foldable buffer device is suitable for elevator shafts with insufficient top floor height, wherein the support beam rotates 90 degrees along the pivot axis.

[0014] The aforementioned foldable buffer device is suitable for elevator shafts with insufficient top floor height, wherein the support beam is driven to rotate along the pivot by a manual push rod.

[0015] The aforementioned foldable buffer device is suitable for elevator shafts with insufficient top floor height. The detection switch is connected to the elevator control system. The detection switch has two switches: switch one and switch two. Switch one is normally open. When the support beam is folded and placed vertically, switch one closes, and the elevator control system activates the elevator's counterweight, allowing the counterweight to run freely. Switch two is normally open. When the support beam is unfolded and placed horizontally, switch two closes, and the elevator control system locks the elevator's counterweight.

[0016] This utility model provides a foldable buffer device suitable for elevator shafts with insufficient top floor height. When the elevator shaft top floor height is insufficient, the foldable buffer device works in conjunction with the elevator control system to ensure safe elevator operation, offering the following advantages:

[0017] (1) Space saving: The thickness of the folded state is only half that of traditional cushioning devices;

[0018] (2) Fast response: It only takes 1.0 second from triggering to full deployment;

[0019] (3) High compatibility: Supports installation into existing elevator systems, reducing retrofit costs;

[0020] (4) Dual safety protection: energy-absorbing composite layer structure + speed triggering logic to avoid false triggering and missed triggering. Attached Figure Description

[0021] Figure 1 This is a structural diagram (support beam unfolded) of the foldable buffer device applicable to elevator shaft top floor height that is insufficient according to this utility model;

[0022] Figure 2 This is a structural diagram of the foldable buffer device (folded support beam) applicable to elevator shaft top floor height shortages according to this utility model.

[0023] Figure 3 This is a diagram showing the working state of the foldable buffer device of this utility model, which is suitable for elevator shaft top floor height that is insufficient.

[0024] Figure 4 This is a diagram showing the non-working state of the foldable buffer device of this utility model, which is suitable for elevator shafts with insufficient top floor height. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, its specific embodiments are described in detail below with reference to the accompanying drawings:

[0026] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The preferred embodiment of this utility model is a foldable buffer device 3 suitable for elevator shaft top floor height that is insufficient, which includes a foldable metal frame and a detection switch 304.

[0027] The foldable metal frame includes two columns 305 and a support beam 303. The two columns are fixed symmetrically to the bottom of the elevator shaft. One end of the support beam 303 is rotatably connected to the top of one of the columns 305 via a pivot 301. The detection switch 304 is mounted on the top of the other column 305 via a bracket.

[0028] An energy-absorbing composite layer 302 is provided in the middle of the support beam 303; the energy-absorbing composite layer 302 is made of shock-absorbing and buffering material, mainly used for shock absorption and noise reduction, and to reduce impact.

[0029] The support beam 303 can rotate 90 degrees clockwise and counterclockwise along the pivot 301. In the non-working state, the support beam 303 is folded and vertically positioned at the top of the connected column 305. In the working state, the support beam 303 is unfolded and horizontally positioned, spanning the tops of the two columns 305. Furthermore, in the working state, the distance h between the support beam and the bottom of the elevator shaft is ≥1.0m. During use, the support beam 303 can be manually rotated along the pivot 301 using a push rod.

[0030] The detection switch 304 is connected to the elevator control system. The detection switch has two switches, namely switch one and switch two. Switch one is normally open. When the support beam 303 is folded and set vertically, switch one is closed, and the elevator control system activates the elevator's counterweight 1, allowing the counterweight to run freely. Switch two is normally open. When the support beam 303 is unfolded and placed horizontally, switch two is closed, and the elevator control system locks the elevator's counterweight 1.

[0031] This utility model relates to a foldable buffer device suitable for elevator shafts with insufficient top floor height. The elevator counterweight 1 moves along the guide rail 2, and a buffer 4 is installed at the bottom of the elevator shaft. During installation, the foldable buffer device 3 is placed in the pit at the bottom of the elevator shaft, and the support beam 303 of the foldable buffer device 3 is located above the buffer 4. Under normal conditions, the support beam 303 is folded without affecting the use of the elevator. When the support beam 303 is unfolded, it forms a foldable buffer structure with an overall height of ≥1.0m.

[0032] The foldable buffer device of this utility model, applicable to elevator shafts with insufficient top floor height, operates as follows:

[0033] (1) The elevator travels to the 2nd floor and opens the door on the 1st floor;

[0034] (2) After the work is completed, turn the maintenance key back to normal mode and leave the car;

[0035] (3) When leaving the pit, retract the support beam 303 of the foldable buffer device of this utility model and reset the door switch on the first floor;

[0036] (4) Remove the overweight protection device and unlock the overweight lock;

[0037] (5) Press the pit switch, secure the stairs and enter the pit;

[0038] (6) When maintenance personnel reach the top control cabinet, they will raise the elevator to a position at least 1.8 to 2.0 meters away from the top floor;

[0039] (7) Open the safety lock switch of the floor door to unlock the floor door;

[0040] (8) Unfold the support beam 303 of the foldable buffer device 3 and observe the car indicator light: when the green light is on, you can enter the car; when the red light is on, you are prohibited from entering.

[0041] (9) Switch the maintenance knob on the maintenance panel to the maintenance state to operate the elevator;

[0042] (10) Fold the maintenance guardrail in sequence, and reset the safety lock switch after closing the door.

[0043] In summary, the foldable buffer device of this utility model, which is suitable for elevator shafts with insufficient top floor height, has a small space occupation, fast response speed, and can dynamically adapt to the car position. This device is installed at the bottom of the elevator shaft pit, supports the counterweight, and the traction force disappears, so the car will no longer move upward. In this working condition, it is equivalent to supporting the car, ensuring the top floor height space for maintenance personnel and solving the risk of overshoot caused by insufficient top floor height.

[0044] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A foldable buffer device suitable for elevator shaft top floor height shortages, characterized in that, Includes a foldable metal frame and a detection switch, wherein: The foldable metal frame includes two columns and a support beam. The two columns are fixed symmetrically to the bottom of the elevator shaft. One end of the support beam is rotatably connected to the top of one of the columns via a pivot. The detection switch is mounted on the top of the other column via a bracket. An energy-absorbing composite layer is provided in the middle of the supporting beam; In the non-working state, the support beam is folded and located vertically at the top of the column it is connected to; in the working state, the support beam is unfolded and positioned horizontally, spanning the tops of the two columns.

2. A foldable buffer device suitable for elevator shaft top floor height shortages according to claim 1, characterized in that, In operation, the distance between the support beam and the bottom of the elevator shaft is ≥1.0m.

3. A foldable buffer device suitable for elevator shaft top floor height shortages according to claim 1, characterized in that, The support beam rotates 90 degrees along the axis of rotation.

4. A foldable buffer device suitable for elevator shaft top floor height shortages according to claim 1, characterized in that, The support beam is rotated along the axis by manually pushing a lever.

5. A foldable buffer device suitable for elevator shaft top floor height shortages according to claim 1, characterized in that, The detection switch is connected to the elevator control system. The detection switch has two switches, namely switch one and switch two. Switch one is normally open. When the support beam is folded and set vertically, switch one is closed, and the elevator control system activates the elevator's counterweight, allowing the counterweight to run freely. Switch two is normally open. When the support beam is unfolded and placed horizontally, switch two is closed, and the elevator control system locks the elevator's counterweight.

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