Escalator door anti-pinch protection device

Abstract

The utility model discloses a kind of anti-pinch protection devices of hall door, belong to elevator equipment technical field;Including anti-pinch detection component and buffer component;The anti-pinch detection component, including respectively embedding in the flexible pressure sensor of two hall doors opposite side edge, and respectively installing in the infrared distance sensor of two hall doors away from elevator shaft side edge;The buffer component, including respectively being arranged in the buffer strip of two hall doors opposite side, hollow cavity being arranged in the buffer strip, elasticity plastic partition plate being distributed in the hollow cavity and being divided into multiple independent buffer units in the hollow cavity and filling in each the honeycomb elastic rubber block of independent buffer unit;The surface of the honeycomb elastic rubber block is distributed with air hole.The utility model passes through integrated dual detection, multistage buffering anti-pinch device, can effectively solve the problem of insufficient detection reliability and shabby buffer structure in prior art.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, and in particular to an anti-pinch protection device for elevator hall doors. Background Technology

[0002] As a critical component for interaction between elevators and passengers, the anti-pinch performance of elevator hall doors directly affects elevator safety. Existing anti-pinch devices for elevator hall doors have the following significant drawbacks: Firstly, the reliability of detection is insufficient: traditional anti-pinch devices mostly rely on a single infrared sensor, which is easily affected by strong light and dust, and has a detection blind spot (especially for low targets such as children and pets); some mechanical contact sensors require direct force to trigger, resulting in a delayed response and easy to cause crushing injuries.

[0003] Secondly, the buffer structure is rudimentary: most existing buffer strips are made of a single rubber material and lack multi-layer buffer design. When the door catches an object, the instantaneous impact force can reach more than 200N, causing great harm to the human body.

[0004] Therefore, there is an urgent need for an anti-pinch device that integrates dual detection and multi-level buffering to solve the safety hazards of existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide an anti-pinch protection device for stairwell doors, so as to solve the problems of insufficient detection reliability and rudimentary buffer structure in the prior art.

[0006] The objective of this utility model is achieved through the following technical solution: An anti-pinch protection device for elevator hall doors includes an anti-pinch detection component and a buffer component; the anti-pinch detection component includes flexible pressure sensors respectively embedded on the opposite edge of two hall doors, and infrared ranging sensors respectively installed on the edge of the two hall doors away from the elevator shaft. The buffer assembly includes buffer strips respectively disposed on opposite sides of the two hall doors, a hollow cavity disposed within the buffer strips, elastic plastic partitions distributed vertically within the hollow cavity and dividing the hollow cavity into multiple independent buffer units, and honeycomb-shaped elastic rubber blocks filled within each of the independent buffer units; the surface of the honeycomb-shaped elastic rubber blocks is provided with vent holes.

[0007] Preferably, the outer surface of the buffer strip is covered with a wear-resistant silicone layer, and the surface of the wear-resistant silicone layer is provided with anti-slip texture.

[0008] Preferably, the density of the honeycomb elastic rubber block is 0.2-0.5 g / cm³, and the diameter of the air pores on its surface is 1-2 mm.

[0009] Preferably, the buffer strip engages with the slide rail on the edge of the door via a slot provided on the back, and the slot and the slide rail are engaged.

[0010] Preferably, the flexible pressure sensor is strip-shaped and its length is the same as the height of the hall door.

[0011] Preferably, multiple infrared ranging sensors are evenly arranged along the height of the hall door, with a spacing of 50-60cm between adjacent sensors and a detection angle of 30°-60°. Preferably, the sensing surface of the flexible pressure sensor is covered with a 0.1-0.2 mm thick polyimide wear-resistant layer. Preferably, the inner wall of the hollow cavity is filled with a 0.5-1mm thick foamed silicone layer. Preferably, it also includes a controller and a buzzer. The drive assembly for opening and closing the hall door, the flexible pressure sensor, the infrared ranging sensor, and the buzzer are all electrically connected to the controller. The drive assembly includes a drive motor, a transmission screw connected to the output shaft of the drive motor, and a left nut and a right nut that are threaded to both sides of the transmission screw. The two ends of the transmission screw are rotatably connected to the door frame through bearing seats.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting up a non-contact early warning infrared ranging sensor and a contact-triggered flexible pressure sensor, can form a dual mechanism of "long-distance monitoring + close-range protection", effectively reducing the detection blind zone and protecting low-lying targets such as children and pets.

[0013] 2. This utility model, by incorporating hollow cavities, partitions, and honeycomb-shaped elastic rubber blocks within the buffer strip, achieves multi-level buffering. Specifically: when the buffer strip contacts an obstacle, the hollow cavity is compressed and contracts, utilizing the change in cavity volume to achieve initial buffering; the partitions divide the hollow cavity into independent buffer units, preventing excessive deformation of individual units from affecting the overall buffering effect, while the elastic deformation of the partitions themselves further disperses the impact force; the honeycomb-shaped elastic rubber blocks are compressed under pressure, their internal honeycomb structure collapses, and gas is discharged through vents, absorbing a large amount of energy through gas damping and rubber elasticity. Through the continuous action of "buffer strip sidewall deformation → hollow cavity volume buffering → partition force dispersion → honeycomb-shaped elastic rubber block compression and gas damping," a multi-level progressive buffering is formed, effectively reducing the instantaneous impact force and significantly reducing the risk of crush injury to passengers. Attached Figure Description

[0014] Figure 1 A cross-sectional view of the two hall doors from the front view. Figure 2A structural diagram showing the two hall doors viewed from the front; Figure 3 This is a schematic diagram of the cross-sectional structure of the buffer strip viewed from above. Figure 4 This is a schematic diagram of the cross-sectional structure of the buffer strip viewed from the front. In the diagram: 1-Hall door, 2-Flexible pressure sensor, 3-Infrared ranging sensor, 4-Buffer strip, 5-Hollow cavity, 6-Separator, 7-Wear-resistant silicone layer, 8-Honeycomb elastic rubber block, 9-Slide rail, 10-Foamed silicone layer. Detailed Implementation

[0015] Example 1 A stairwell door anti-pinch protection device, such as Figure 1-2 As shown, it includes an anti-pinch detection component and a buffer component; the anti-pinch detection component includes flexible pressure sensors 2 (model FSR402) respectively embedded on the opposite edges of the two hall doors 1, and infrared ranging sensors 3 (model GP2Y0A21YK) respectively installed on the edges of the two hall doors 1 away from the elevator shaft; further, the flexible pressure sensors 2 are strip-shaped, and their length is the same as the height of the hall door 1. Further, as... Figure 2 As shown, multiple infrared ranging sensors 3 are evenly arranged along the height direction of the hall door 1, with a spacing of 50-60cm between adjacent sensors, and the detection angle of the infrared ranging sensor 3 is 30°-60°. like Figure 3-4 As shown, the buffer assembly includes buffer strips 4 (optionally EPDM rubber) respectively disposed on opposite sides of the two hall doors 1, a hollow cavity 5 disposed within the buffer strips 4, elastic plastic partitions 6 vertically distributed within the hollow cavity 5 and dividing the hollow cavity 5 into multiple independent buffer units, and honeycomb-shaped elastic rubber blocks 8 filled within each independent buffer unit; the surface of the honeycomb-shaped elastic rubber blocks 8 is provided with venting holes. Further, the density of the honeycomb-shaped elastic rubber blocks 8 is 0.2 - 0.5 g / cm³. 3 The diameter of the vent holes on its surface is 1-2 mm. Furthermore, the anti-pinch protection device also includes a controller and a buzzer. The drive assembly for opening and closing the hall door 1, the flexible pressure sensor 2, the infrared ranging sensor 3, and the buzzer are all electrically connected to the controller. The drive assembly includes a drive motor, a transmission screw connected to the output shaft of the drive motor, and left and right nuts respectively threaded to both sides of the transmission screw. The two ends of the transmission screw are rotatably connected to the door frame via bearing seats (the drive assembly is existing technology, and this invention does not improve upon it). The controller (using an STM32F103RCT6 microcontroller), the buzzer, and the drive assembly are all existing technologies and are not shown in the figures.

[0016] Working principle: When the hall door 1 is closed, the infrared ranging sensor 3 scans the gap between the two doors in real time. When an obstacle (such as a hand or luggage) is detected to enter within 50cm, a signal is sent to the controller. The controller immediately reduces the speed of the drive motor to 50r / min (door speed 0.075m / s) and triggers the buzzer to sound an alarm. If the obstacle is not removed, the hall door 1 continues to close. The buffer strip 4 first contacts the obstacle, and the hollow cavity 5 is compressed and contracted, using the change in cavity volume to achieve initial buffering. The partition plate 6 divides the hollow cavity 5 into independent buffer units to avoid excessive deformation of a single unit affecting the overall buffering effect. At the same time, the elastic deformation of the partition plate 6 itself further disperses the impact force. The honeycomb elastic rubber block 8 is compressed under pressure, and its internal honeycomb structure collapses and discharges gas through the vents. With the help of gas damping and rubber elasticity, a large amount of energy is absorbed. Through the continuous action of "deformation of the side wall of the buffer strip 4 → volume buffering of the hollow cavity 5 → force dispersion by the partition plate 6 → compression and gas damping of the honeycomb elastic rubber block 8", a multi-level progressive buffer is formed, effectively reducing the instantaneous impact force. The deformation of the buffer strip 4 is transmitted to the flexible pressure sensor 2 on the inner side. When the pressure is ≥5N, the sensor resistance change signal is converted by the controller AD and immediately outputs a command: drive the motor to reverse (speed 100r / min) to open the hall door 1, and the buzzer will continue to sound an alarm until 3 seconds after the obstacle is removed, the system resets and re-executes the door closing process.

[0017] Example 2 Based on Example 1, the outer surface of the buffer strip 4 is covered with a wear-resistant silicone layer 7, and the surface of the wear-resistant silicone layer 7 is provided with anti-slip texture. When the buffer strip 4 comes into contact with an obstacle, the outer wear-resistant silicone layer 7 deforms first, absorbing part of the impact force through its own elasticity.

[0018] Furthermore, the buffer strip 4 is engaged with the slide rail 9 on the edge of the door via a slot on its back. This structure ensures that the buffer strip 4 is securely installed, preventing it from loosening or shifting when the hall door 1 is opened and closed, ensuring reliable buffering and pressure transmission, and facilitating later disassembly and replacement, reducing maintenance costs and meeting the stability requirements of the buffer assembly in this invention.

[0019] Furthermore, the sensing surface of the flexible pressure sensor 2 is covered with a 0.1-0.2 mm thick polyimide wear-resistant layer. This structure enhances the wear resistance of the flexible pressure sensor 2, resisting daily friction and environmental corrosion, without affecting the pressure sensing sensitivity.

[0020] Furthermore, the inner wall of the hollow cavity 5 is filled with a 0.5-1 mm thick foamed silicone layer 10 (density 0.1 g / cm³). 3This structure can fill the gap between the honeycomb elastic rubber block 8 and the cavity wall, prevent the honeycomb elastic rubber block 8 from shifting, make each buffer unit bear force evenly, and can also form a pre-buffering, further reducing the impact force, extending the life of the buffer assembly, and improving the stability of the buffer performance of this utility model.

Claims

1. A stairwell door anti-pinch protection device, comprising an anti-pinch detection component and a buffer component; characterized in that, The anti-pinch detection component includes flexible pressure sensors (2) embedded on the opposite edge of the two hall doors (1) and infrared distance sensors (3) installed on the edge of the two hall doors (1) away from the elevator shaft. The buffer assembly includes buffer strips (4) respectively disposed on opposite sides of the two hall doors (1), a hollow cavity (5) disposed in the buffer strips (4), an elastic plastic partition plate (6) distributed vertically in the hollow cavity (5) and dividing the hollow cavity (5) into multiple independent buffer units, and a honeycomb elastic rubber block (8) filled in each of the independent buffer units; the surface of the honeycomb elastic rubber block (8) is provided with vent holes.

2. The anti-pinch protection device for stairwell doors according to claim 1, characterized in that, The outer surface of the buffer strip (4) is covered with a wear-resistant silicone layer (7), and the surface of the wear-resistant silicone layer (7) is provided with anti-slip texture.

3. The anti-pinch protection device for stairwell doors according to claim 2, characterized in that, The density of the honeycomb elastic rubber block (8) is 0.2-0.5 g / cm³, and the diameter of the air pores on its surface is 1-2 mm.

4. The anti-pinch protection device for stairwell doors according to claim 1, characterized in that, The buffer strip (4) is engaged with the slide rail (9) on the edge of the door through a slot provided on the back. The slot and the slide rail (9) are engaged.

5. The anti-pinch protection device for stairwell doors according to claim 1, characterized in that, The flexible pressure sensor (2) is strip-shaped and its length is the same as the height of the hall door (1).

6. The anti-pinch protection device for stairwell doors according to claim 1, characterized in that, The infrared ranging sensors (3) are evenly arranged in multiple directions along the height of the hall door (1), with a spacing of 50-60cm between adjacent sensors and a detection angle of 30°-60°.

7. The anti-pinch protection device for stairwell doors according to claim 1, characterized in that, The sensing surface of the flexible pressure sensor (2) is covered with a 0.1-0.2 mm thick polyimide wear-resistant layer.

8. The anti-pinch protection device for stairwell doors according to claim 1, characterized in that, The inner wall of the hollow cavity (5) is filled with a 0.5-1mm thick foamed silicone layer (10).

9. The anti-pinch protection device for stairwell doors according to claim 1, characterized in that, It also includes a controller and a buzzer. The drive assembly for opening and closing the hall door (1), the flexible pressure sensor (2), the infrared ranging sensor (3) and the buzzer are all electrically connected to the controller. The drive assembly includes a drive motor, a transmission screw connected to the output shaft of the drive motor, and a left nut and a right nut that are threaded to both sides of the transmission screw. The two ends of the transmission screw are rotatably connected to the door frame through bearing seats.

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