Elevator rescue door opening protection system

Abstract

The utility model discloses an elevator rescue door opening protection system which comprises a landing door detection switch, an upper sensor, a lower sensor, a control device, a landing door toe guard, a driver and a power supply. The hoistway door detection switch is arranged on one side of an elevator hoistway door and used for detecting opening of the elevator hoistway door, and the hoistway door detection switch is connected with the signal input end of the control device; the upper sensor and the lower sensor are vertically arranged in an elevator shaft, correspond to an elevator landing door and are used for detecting an elevator car, and the upper sensor and the lower sensor are respectively connected with a signal input end of the control device; the landing door toe guard is movably arranged in an elevator shaft through the driver and located on one side of a floor slab, the landing door toe guard can stretch out and draw back vertically under the action of the driver, and the signal output end of the control device is connected with the driver. The power supply is connected with the power input end of the control device and used for supplying power to the system. According to the utility model, accidents caused by falling into an elevator shaft from a cavity area can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety, and particularly relates to an elevator rescue door opening protection system. Background Art

[0002] When the elevator breaks down or the municipal power grid cuts off power, the passengers in the elevator car will be trapped and need to be rescued in time. During the rescue, since the position of the elevator car 10 is relatively high, there is a gap between the lower edge of the car door toe guard 20 and the landing door sill, forming a hollow area 30. As Figure 1 shown, when the height of the hollow area 30 is greater than 150 mm, after the trapped passengers in the elevator car 10 are rescued or the trapped passengers pry open the door and self-rescue out of the elevator car 10, there is a risk of falling into the elevator shaft from the hollow area 30. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an elevator rescue door opening protection system, which can prevent accidents caused by falling into the elevator shaft from the hollow area.

[0004] The technical solution of the utility model is as follows:

[0005] An elevator rescue door opening protection system includes a landing door detection switch, an upper sensor, a lower sensor, a control device, a landing door toe guard, a driver and a power supply;

[0006] The landing door detection switch is arranged on one side of the elevator landing door and is used for detecting the opening of the elevator landing door. The landing door detection switch is connected to the signal input end of the control device;

[0007] The upper sensor and the lower sensor are arranged up and down in the elevator shaft and correspond to the elevator landing door, and are used for detecting the elevator car. The upper sensor and the lower sensor are respectively connected to the signal input end of the control device;

[0008] The landing door toe guard is movably arranged in the elevator shaft and is located on one side of the floor slab through a driver. The landing door toe guard can be telescopically extended up and down under the action of the driver. The signal output end of the control device is connected to the driver;

[0009] The power supply is connected to the power input end of the control device and is used for supplying power to the system.

[0010] Wherein, the distance between the lower sensor and the landing door sill is 970 mm, and the distance between the upper sensor and the landing door sill is 1200 mm.

[0011] Wherein, the minimum extended length of the landing door toe guard is 230 mm.

[0012] Wherein, the extendable length of the landing door toe guard is 300 mm.

[0013] Wherein, the control device is installed in the elevator control cabinet or in the elevator shaft.

[0014] Wherein, the control device is provided with a reset switch.

[0015] The elevator rescue doorway protection system further includes an ARD power supply, which is connected to the power input terminal of the control device.

[0016] Compared with the prior art, the beneficial effect of the present invention is that: the present invention provides a hall door toe guard on one side of the floor in the elevator shaft. When a hollow area is formed between the lower edge of the hall door toe guard and the hall door sill, the hall door toe guard can be extended upward under the action of a driver, thereby avoiding the risk of trapped people in the elevator car being rescued or trapped people falling into the elevator shaft from the hollow area after trying to rescue themselves from the elevator car by prying open the door, thereby protecting the safety of people. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the elevator void area formed when an elevator failure occurs or the city power grid is cut off;

[0019] Figure 2 This is a structural diagram of an elevator rescue doorway protection system provided by the utility model;

[0020] Figure 3 This is a circuit diagram of an elevator rescue doorway protection system provided by the utility model;

[0021] Figure 4 This is a schematic diagram of an elevator rescue doorway protection system provided by the present invention when no rescue protection is performed;

[0022] Figure 5 This is a schematic diagram of an elevator rescue doorway protection system provided by the present invention during rescue protection. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] To illustrate the technical solution of the present utility model, the following will be described through specific embodiments.

[0025] Embodiment

[0026] Please refer to Figure 2 、 Figure 3 This embodiment provides an elevator rescue door opening protection system, including a landing door detection switch, an upper sensor 1, a lower sensor 2, a control device, a landing door footplate 3, a driver 4, a power supply and an ARD power supply. Among them, the landing door detection switch is arranged on one side of the elevator landing door for detecting the opening of the elevator landing door, and the landing door detection switch is connected to the signal input end of the control device; the upper sensor 1 and the lower sensor 2 are arranged up and down in the elevator hoistway 40 and correspond to the elevator landing door for detecting the elevator car 10. The upper sensor 1 and the lower sensor 2 are respectively connected to the signal input end of the control device. Generally, the height of the elevator car footplate 20 in the elevator design is 820 mm, and the distance between the lower edge of the elevator car footplate 20 and the landing door sill is 150 mm, which will not cause falling into the hoistway. Therefore, the installation position of the lower sensor 2 for detecting the elevator car 10 should be installed at 820 + 150 = 970 mm from the landing door sill. If the actual rescue car door opening on site is less than 900 mm, rescue will not be carried out, but go to the upper floor for rescue. Therefore, the installation position of the upper sensor 1 should be installed at 2100 - 900 = 1200 mm from the landing door sill; the landing door footplate 3 is movably arranged in the elevator hoistway 40 through the driver 4 and is located on one side of the floor slab 50. The landing door footplate 3 can be telescoped up and down under the action of the driver 4. The signal output end of the control device is connected to the driver 4; the power supply and the ARD power supply are connected to the power input end of the control device for supplying power to the system. The ARD power supply is used as an emergency rescue backup power supply. When the normal power supply is cut off, the protection function is still effective; the control device is installed in the elevator control cabinet or in the elevator hoistway 40. A reset switch is provided on the control device. Press the reset switch for more than 5 s, and the control device outputs a signal to make the driver 4 drive the landing door footplate 3 to retract, and then close the landing door.

[0027] Combined with Figure 4 、 Figure 5 As shown, the specific working principle is as follows:

[0028] When the hall door opens, the hall door detection switch actuates, sending a signal to the control device. Upper sensor 1 fails to detect elevator car 10, but lower sensor 2 does. The control device then sends a signal to driver 4 to extend hall door toe guard 3. The extension of hall door toe guard 3 is set to 300mm. The hall door opening height is 2100mm. The standard requires a 1000mm car opening for rescue operations. However, the actual car opening is less than 900mm during on-site rescues. Rescue on this floor is absolutely not performed, but rather on the previous rescue attempt. The hall door opens on the upper floor, and the sensor senses the elevator. The control device does not output to driver 4, and the lower half of the car door faces the shaft wall, eliminating the risk of falling into the shaft. The maximum height of the elevator car when no protection is required is 970mm, the location where lower sensor 2 is installed. Therefore, the minimum extension length of hall door toe guard 3 is 2100-900-970 = 230mm.

[0029] The elevator rescue door opening protection system can avoid the risk of trapped people in the elevator car being rescued or trapped people falling into the elevator shaft from the hollow area after trying to rescue themselves from the elevator car by prying open the door, thereby protecting the safety of people.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An elevator rescue door opening protection system, characterized in that: It includes a landing door detection switch, an upper sensor, a lower sensor, a control device, a landing door kick plate, a driver, and a power supply. The landing door detection switch is arranged on one side of the elevator landing door for detecting the opening of the elevator landing door, and the landing door detection switch is connected to the signal input end of the control device. The upper sensor and the lower sensor are arranged vertically in the elevator hoistway and correspond to the elevator landing door for detecting the elevator car, and the upper sensor and the lower sensor are respectively connected to the signal input end of the control device. The landing door kick plate is movably arranged in the elevator hoistway through the driver and is located on one side of the floor slab. The landing door kick plate can be telescoped up and down under the action of the driver, and the signal output end of the control device is connected to the driver. The power supply is connected to the power input end of the control device for supplying power to the system.

2. The elevator rescue door opening protection system according to claim 1, characterized in that: The distance between the lower sensor and the landing door sill is 970 mm, and the distance between the upper sensor and the landing door sill is 1200 mm.

3. The elevator rescue door opening protection system according to claim 1, wherein: The minimum extended length of the landing door kick plate is 230 mm.

4. The elevator rescue door opening protection system according to claim 3, characterized in that: The extendable length of the landing door kick plate is 300 mm.

5. The elevator rescue door opening protection system according to claim 1, characterized in that: The control device is installed in the elevator control cabinet or in the elevator hoistway.

6. The elevator rescue door opening protection system according to claim 1, characterized in that: A reset switch is provided on the control device.

7. The elevator rescue door opening protection system according to claim 1, characterized in that: This elevator rescue door opening protection system further includes an ARD power supply, and the ARD power supply is connected to the power input end of the control device.

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