A domestic ladder pit protection device

Abstract

The application discloses a household ladder pit protection device, which is installed on the car bottom of a household elevator. The bottom of the car bottom is formed with a turned-up edge. A rectangular safety edge is arranged below the turned-up edge. A spacing space is formed between the bottom surface of the car bottom and the rectangular safety edge. A micro switch is installed on the bottom of the car bottom. A gap is formed between the bottom of the micro switch and the top surface of the rectangular safety edge. A plurality of positioning bolts are circumferentially welded on the rectangular safety edge. The top of each positioning bolt penetrates through the turned-up edge and is provided with a nut. A compression spring is arranged outside each positioning bolt between the rectangular safety edge and the turned-up edge. The micro switch is connected to the safety circuit of the household elevator. The safety performance is improved. When the elevator is descending, the elevator is stopped if the sealing plate touches an object.

Description

Technical Field

[0001] This application relates to home elevators, and more particularly to a home elevator pit protection device. Background Technology

[0002] The home elevator market is expanding, but in practice, not all home elevator installations guarantee sufficient pit depth for maintenance and repair. Therefore, a device is needed to stop the elevator while maintenance personnel are working in the pit, ensuring the safety of both personnel and the elevator. Currently, most solutions involve adding mechanical barriers to the pit to protect personnel and equipment.

[0003] Currently, most solutions involve adding mechanical barriers to the pit to protect personnel and equipment. However, these barriers have several drawbacks: 1. They need to be manually adjusted before use, which is inefficient; 2. There is no space to install the barriers if the pit is too small; 3. The barriers are unsightly when placed in the sightseeing shaft; 4. The protection height is limited, and they only work within the height range of the barriers themselves.

[0004] In existing technology, a microswitch is a contact mechanism with a tiny contact interval and a quick-acting mechanism. It operates with a specified stroke and force, and is covered by a housing with an external drive button. When external mechanical force acts on the microswitch's actuating spring via the drive button, it quickly connects or disconnects the fixed and moving contacts. When the force on the drive button is removed, the actuating spring generates a reverse force. When the reverse stroke of the transmission element reaches the spring's critical point, the reverse action is instantaneously completed, resetting the microswitch. The microswitch is connected in series in the elevator's safety circuit to control the circuit's on / off state. Utility Model Content

[0005] The purpose of this invention is to provide a household stairwell pit protection device that improves safety performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] This application discloses a home elevator pit protection device, installed on the car bottom of a home elevator. The bottom of the car bottom has a flange, and a rectangular safety edge is provided below the flange. A gap is formed between the bottom surface of the car bottom and the rectangular safety edge. A micro switch is installed at the bottom of the car bottom, and a gap is formed between the bottom of the micro switch and the top surface of the rectangular safety edge. Multiple positioning bolts are welded circumferentially along the rectangular safety edge. The top of each positioning bolt passes through the flange and is fitted with a nut. A compression spring is sleeved on the outer side of each positioning bolt between the rectangular safety edge and the flange. The micro switch is connected to the safety circuit of the home elevator.

[0008] When the rectangular safety edge is squeezed, the micro switch is disconnected, thereby breaking the safety circuit of the home elevator and stopping the home elevator.

[0009] Preferably, in the above-mentioned household stairwell pit protection device, the bottom of the rectangular safety side is connected to a sealing plate.

[0010] Preferably, in the above-mentioned household stairwell pit protection device, eight microswitches are provided, arranged in pairs on the four sides of the bottom of the car floor.

[0011] Preferably, in the above-mentioned household stairwell pit protection device, the rectangular safety edge is connected to the sealing plate by a flat-head screw.

[0012] Preferably, in the above-mentioned household stairwell pit protection device, a nylon sleeve is provided on the flange, and the positioning bolt passes through the nylon sleeve.

[0013] Compared with existing technologies, the advantages of this technical solution are:

[0014] 1. The protection device is installed on the bottom of the car and can move with the car. The protection range in the height direction is the entire travel of the elevator.

[0015] 2. The horizontal protection range is the projected area of ​​the entire car bottom.

[0016] 3. The protective device and the car bottom sealing plate are integrated into one unit, which ensures both safety and the aesthetics of the elevator.

[0017] 4. No additional mechanical devices are needed for the pit.

[0018] 5. The design using compression springs and nylon sleeves installed at the bottom of the car ensures that the protective device operates without noise during use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 The diagram shown is an exploded view of the household stairwell pit protection device in an embodiment of this utility model.

[0021] Figure 2 The diagram shown is a schematic of the household stairwell pit protection device with the sealing plate removed in an embodiment of this utility model;

[0022] Figure 3 As shown Figure 2 Enlarged view of point A in the middle. Detailed Implementation

[0023] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Combination Figure 1-3 As shown, a home elevator pit protection device 100 is installed on the car bottom 200 of the home elevator. A flange 101 is formed at the bottom of the car bottom 200, and a rectangular safety edge 102 is provided below the flange 101. A gap 103 is formed between the bottom surface of the car bottom 200 and the rectangular safety edge 102. A micro switch 104 is installed at the bottom of the car bottom 200. There is a 1-2mm gap between the bottom of the micro switch 104 and the top surface of the rectangular safety edge 102. Multiple positioning bolts 105 are welded circumferentially along the upper edge of the rectangular safety edge 102. The top of each positioning bolt 105 passes through the flange 101 and is fitted with a nut 106. A compression spring 107 is sleeved on the outer side of each positioning bolt 105 between the rectangular safety edge 102 and the flange 101. The micro switch 104 is connected to the safety circuit of the home elevator.

[0025] When the rectangular safety edge 102 is compressed, the micro switch 104 is disconnected, thereby breaking the safety circuit of the home elevator and stopping the home elevator.

[0026] A sealing plate 108 is connected to the bottom of the rectangular safety edge 102. Eight microswitches 104 are provided, arranged in pairs on the four sides of the bottom of the car bottom 200. The rectangular safety edge 102 is connected to the sealing plate by flat-head screws 109. A nylon sleeve 110 is provided on the flange 101, and a positioning bolt 105 passes through the nylon sleeve 110.

[0027] In this embodiment, the existing technology of microswitches is used. A microswitch is a contact mechanism with a small contact interval and a quick-acting mechanism, which performs switching actions with a specified stroke and force. It is covered by a housing and has a drive button on the outside. When external mechanical force acts on the micro-acting spring through the drive button, the fixed contact at its end quickly connects or disconnects from the moving contact. When the force on the drive button is removed, the actuating spring generates a reverse action force. When the reverse stroke of the transmission element reaches the spring's action critical point, the reverse action is instantaneously completed, resetting the microswitch. The microswitch is connected in series in the elevator's safety circuit to control the on / off state of the safety circuit. Nylon sleeves are pre-installed in the mounting holes on the car bottom. Positioning bolts are welded to the safety side. The safety side is fixed to the car bottom after passing through the nylon sleeves via positioning bolts and compression springs. M6 nuts are welded around the safety side, and the sealing plate is fixed to the safety side with M6 flat-head screws. Under normal elevator operation, the spring force between the car bottom and the safety edge ensures that the relative positions of the safety edge and the sealing plate remain constant with respect to the car bottom, preventing noise caused by vertical vibration during normal elevator operation. When the sealing plate encounters an obstacle during elevator descent, the sealing plate and safety edge move upward with the positioning bolts. The safety edge presses against the drive button of the contact switch, causing its fixed and moving contacts to disconnect, thus disconnecting the elevator safety circuit. This de-energizes the traction machine brake, causing the brake to grip the traction sheave shaft, stopping the traction sheave's rotation. The steel belt or wire rope also stops moving, and the counterweight and car connected to both ends of the steel belt or wire rope also stop moving accordingly, effectively stopping the elevator. This ensures the safety of maintenance personnel and equipment in the pit during elevator descent. When the obstacle leaves the sealing plate, the sealing plate and safety edge return to their initial state due to the spring force. The safety edge moves away from the drive button of the micro switch, and the micro switch, through the reaction force of its internal actuating spring, quickly connects its fixed and moving contacts, simultaneously activating the elevator safety circuit, and the elevator returns to normal operation. The hollow structure in the middle of the safety edge is designed to facilitate the installation of the car wall and wiring of the micro switch. This allows the safety edge and micro switch to be adjusted in place before leaving the factory, so that the installer does not need to disassemble the safety edge during on-site installation.

[0028] Unlike other mechanical pit blocking devices, this invention provides a solution where the protective device is directly installed on the car floor. The protective device is fully debugged when the elevator is installed, eliminating the need for reinstallation and debugging during subsequent elevator maintenance. This protective device can be used whenever the pit is larger than 100 mm. The protective device and the sealing plate are integrated into one unit, which can also serve as a decorative cover for the car floor, eliminating the need for additional devices in the pit and ensuring its aesthetics. The protective device operates with the elevator, with a vertical protection range covering the entire elevator travel distance and a horizontal protection range covering the entire projected area of ​​the car floor.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A home elevator pit protection device, installed at the bottom of the car of a home elevator, characterized in that, The bottom of the car floor has a flange, and a rectangular safety edge is provided below the flange. A gap is formed between the bottom surface of the car floor and the rectangular safety edge. A micro switch is installed at the bottom of the car floor, and a gap is formed between the bottom of the micro switch and the top surface of the rectangular safety edge. Multiple positioning bolts are welded circumferentially along the rectangular safety edge. The top of each positioning bolt passes through the flange and is fitted with a nut. A compression spring is sleeved on the outside of each positioning bolt between the rectangular safety edge and the flange. The micro switch is connected to the safety circuit of the home elevator. When the rectangular safety edge is squeezed, the micro switch is disconnected, thereby breaking the safety circuit of the home elevator and stopping the home elevator.

2. The household stairwell pit protection device according to claim 1, characterized in that, The bottom of the rectangular safety edge is connected to a sealing plate.

3. The household stairwell pit protection device according to claim 1, characterized in that, There are eight microswitches, arranged in pairs on the four sides of the bottom of the car body.

4. The household stairwell pit protection device according to claim 2, characterized in that, The rectangular safety edge is connected to the sealing plate by flat-head screws.

5. The household stairwell pit protection device according to claim 1, characterized in that, A nylon sleeve is provided on the flange, and the positioning bolt passes through the nylon sleeve.

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