Elevator light curtain anti-collision device

Abstract

The utility model relates to the technical field of elevator manufacturing equipment, in particular to an elevator light curtain anti-collision device which comprises a wall and a car door opening and closing assembly, and an elevator door and light curtain assembly is arranged in the wall and car door opening and closing assembly. Through movable connection of the dovetail limiting rod and the light curtain assembly shell and movable installation of the light curtain assembly shell on one side of the anti-collision strip, the light curtain assembly can keep a stable moving track while having a certain moving space, the limiting plate is fixed in the elevator door body, and the limiting plate is fixed to the position of the light curtain assembly. The horizontal height of the light curtain assembly is lower than that of a wall and a threshold at the bottom of the car door opening and closing assembly, and the light curtain assembly is matched with a spring, a first inhaul cable and other parts at the bottom of a shell of the light curtain assembly, so that precise control and buffering protection of the position of the light curtain assembly are ingeniously achieved; and collision accidents are effectively avoided, and the running safety of the elevator is greatly improved.

Description

Technical Field

[0001] This application relates to the field of elevator manufacturing equipment technology, and in particular to an elevator light curtain anti-collision device. Background Technology

[0002] In modern buildings, elevators are crucial for vertical transportation, and their safety is paramount. With rapid urbanization and the increasing number of high-rise buildings, elevator usage has risen dramatically, making elevator safety a major concern. Traditional elevator light curtains primarily use infrared sensors to detect obstacles between elevator doors to prevent people or objects from getting caught. However, these light curtains have limitations. Firstly, in actual use, environmental factors such as dust and moisture can affect the light curtain's accuracy, leading to decreased detection precision and false alarms.

[0003] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Existing devices typically use infrared rays to form a mesh-like sensor light curtain to sense objects in the middle of the door. However, the mesh-like sensor light curtain is usually static and has blind spots. When thin objects, such as dog leashes or clotheslines, are located in the blind spots of the light curtain, the light curtain usually cannot recognize the objects. This can easily lead to situations where people and pet dogs do not enter the elevator at the same time, but the elevator door closes. Utility Model Content

[0004] In view of the shortcomings of the prior art and in order to solve the problems mentioned in the background art, this application provides an elevator light curtain anti-collision device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an elevator light curtain anti-collision device, comprising a wall and a car door opening and closing assembly, wherein an elevator door and a light curtain assembly are disposed inside the wall and car door opening and closing assembly; the elevator door and light curtain assembly includes an elevator door body, a dovetail limit rod, an anti-collision strip, a light curtain assembly shell, a light curtain sensor, a spring, a first cable, a limit plate, a positioning groove, a limit groove, and a first pulley; the elevator door body includes left and right car door panels, and a dovetail limit rod is fixedly installed inside the elevator door body. The elevator door body is internally fitted with anti-collision strips. A light curtain assembly housing is movably mounted on one side of the dovetail limit rod. A light curtain sensor is installed on one side of the light curtain assembly housing. A spring is located at the bottom of the light curtain assembly housing, and a first pull cable is fixedly connected to the bottom of the light curtain assembly housing. A limit plate is fixedly connected to the bottom of the spring. Positioning grooves are formed on both sides of the limit plate, and a limit groove is formed on the other side of the limit plate. A first pulley is movably mounted inside the limit groove, and the first pulley is movably connected to one side of the first pull cable. The dovetail limit rod, through its dovetail groove structure, restricts the range of motion of the light curtain assembly housing, ensuring the stability of the light curtain assembly during door movement.

[0006] Optionally, the elevator door and light curtain assembly further includes a second cable, a second pulley, a third pulley, a winch, a rotating shaft, a worm gear, a worm, a synchronous servo motor, and a motor mounting plate. The second cable is fixedly connected to the bottom of the first cable. A second pulley is movably connected to one side of the second cable, and a third pulley is movably connected to the other side of the second cable. The end of the third pulley is fixedly connected to one side of the winch. A rotating shaft is fixedly mounted on the axis of the winch. A worm gear is fixedly sleeved on one side of the rotating shaft. A worm is meshed with a worm on one side of the worm gear. The worm is fixedly mounted at the bottom of the output end of the synchronous servo motor. A motor mounting plate is fixedly mounted on the top of the synchronous servo motor, and the motor mounting plate is fixedly mounted inside the elevator door body. The winch is connected to the worm gear via the rotating shaft and is used to raise and lower the second cable, controlling the movement of the light curtain assembly housing.

[0007] Optionally, the interior of the wall and car door opening and closing assembly is provided with a drive device for controlling the opening and closing of the car door and a slide rail at the bottom of the car door. The interior of the wall and car door opening and closing assembly is reserved with space for the opening and closing of the elevator door body. A threshold is provided at the bottom of the wall and car door opening and closing assembly, and the top of the threshold is flush with the ground.

[0008] Optionally, the light curtain sensor inside the car door on the left side of the elevator door body is an infrared emitting device, and the light curtain sensor inside the car door on the right side of the elevator door body is an infrared receiving device.

[0009] Optionally, the housing of the light curtain assembly is movably connected to one side of the anti-collision strip, and the housing of the light curtain assembly has a dovetail groove at the corresponding position of the dovetail limiting rod.

[0010] Optionally, the limiting plate is fixedly installed inside the elevator door body. The horizontal height of the limiting plate is lower than the threshold at the bottom of the wall and the car door opening and closing assembly. The light curtain sensor includes multiple infrared emitters. When the housing of the light curtain assembly moves to the top of the limiting plate, the position of the infrared emitter at the bottom of the light curtain sensor corresponds to the position of the threshold at the bottom of the wall and the car door opening and closing assembly.

[0011] Optionally, the pivot is movably installed inside the elevator door body, the third pulley is movably installed inside the elevator door body, and the second pulley is movably installed inside the elevator door body.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] 1. This utility model uses a dovetail limiting rod to connect movably with the housing of the light curtain component, and the housing of the light curtain component is movably installed on the side of the anti-collision strip. This allows the light curtain component to have a certain amount of room to move while maintaining a stable running trajectory. The limiting plate is fixed inside the elevator door body, and its horizontal height is lower than the threshold at the bottom of the wall and the car door opening and closing components. In conjunction with the spring, the first cable and other components at the bottom of the light curtain component housing, it cleverly achieves precise control and buffer protection of the position of the light curtain component.

[0014] 2. In use, this utility model employs an infrared transmitting and receiving device, which can efficiently detect obstacles near the elevator door. When an object blocks the infrared light, the outer shell of the light curtain assembly can move accordingly under the action of components such as springs, cables, and pulleys. At the same time, in conjunction with the synchronous servo motor driven winch, worm gear, and other transmission structures, the elevator door status can be adjusted in a timely manner, effectively avoiding collision accidents and greatly improving the safety of elevator operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the device in the embodiments of this application;

[0016] Figure 2 This is a schematic diagram of a partial structure of the device in an embodiment of this application;

[0017] Figure 3 This is a partial structural diagram of the elevator door and light curtain assembly in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the partial structural installation of the elevator door and light curtain assembly in an embodiment of this application.

[0019] Reference numerals in the attached drawings: 1. Wall and car door opening and closing assembly; 2. Elevator door and light curtain assembly; 201. Elevator door body; 202. Dovetail limit bar; 203. Anti-collision strip; 204. Light curtain assembly housing; 205. Light curtain sensor; 206. Spring; 207. First cable; 208. Limiting plate; 209. Positioning groove; 210. Limiting groove; 211. First pulley; 212. Second cable; 213. Second pulley; 214. Third pulley; 215. Winch; 216. Rotating shaft; 217. Worm gear; 218. Worm; 219. Synchronous servo motor; 220. Motor mounting plate. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0021] This application discloses an elevator light curtain anti-collision device.

[0022] Please see Figure 1 An elevator light curtain anti-collision device includes a wall and car door opening and closing assembly 1, with an elevator door and light curtain assembly 2 installed inside the wall and car door opening and closing assembly 1; please refer to Figures 2 to 4 Elevator door and light curtain assembly 2, comprising elevator door body 201, dovetail limit rod 202, anti-collision strip 203, light curtain assembly housing 204, light curtain sensor 205, spring 206, first cable 207, limit plate 208, positioning groove 209, limit groove 210 and first pulley 211. Elevator door body 201 includes left and right car door panels. Dovetail limit rod 202 is fixedly installed inside elevator door body 201. Anti-collision strip 203 is fixedly installed inside elevator door body 201. One side of dovetail limit rod 202 is movably installed. The light curtain assembly housing 204 has a light curtain sensor 205 on one side and a spring 206 at the bottom. A first cable 207 is also fixedly connected to the bottom of the light curtain assembly housing 204. A limit plate 208 is fixedly connected to the bottom of the spring 206. A positioning groove 209 is opened on both the left and right sides of the limit plate 208. A limit groove 210 is opened on the other side of the limit plate 208. A first pulley 211 is movably installed inside the limit groove 210. The first pulley 211 is movably connected to one side of the first cable 207.

[0023] The elevator door and light curtain assembly 2 also includes a second cable 212, a second pulley 213, a third pulley 214, a winch 215, a rotating shaft 216, a worm gear 217, a worm 218, a synchronous servo motor 219, and a motor mounting plate 220. The second cable 212 is fixedly connected to the bottom of the first cable 207. The second pulley 213 is movably connected to one side of the second cable 212, and the third pulley 214 is movably connected to the other side of the second cable 212. The end of the third pulley 214 is fixedly connected to one side of the winch 215. The rotating shaft 216 is fixedly installed on the axis of the winch 215. The worm gear 217 is fixedly sleeved on one side of the rotating shaft 216. The worm 218 is meshed and driven on one side of the worm gear 217. The worm 218 is fixedly installed at the bottom of the output end of the synchronous servo motor 219. The motor mounting plate 220 is fixedly installed on the top of the synchronous servo motor 219. The motor mounting plate 220 is fixedly installed inside the elevator door body 201.

[0024] The interior of the wall and car door opening and closing assembly 1 is equipped with a drive device for controlling the opening and closing of the car door and a slide rail at the bottom of the car door. The interior of the wall and car door opening and closing assembly 1 is reserved for the opening and closing of the elevator door body 201. A threshold is provided at the bottom of the wall and car door opening and closing assembly 1, and the top of the threshold is flush with the ground.

[0025] The light curtain sensor 205 inside the car door on the left side of the elevator door body 201 is an infrared transmitter, and the light curtain sensor 205 inside the car door on the right side of the elevator door body 201 is an infrared receiver.

[0026] The light curtain component housing 204 is movably connected to one side of the anti-collision strip 203, and the light curtain component housing 204 has a dovetail groove at the corresponding position of the dovetail limit rod 202.

[0027] The limiting plate 208 is fixedly installed inside the elevator door body 201. The horizontal height of the limiting plate 208 is lower than the threshold at the bottom of the wall and the car door opening and closing assembly 1. The light curtain sensor 205 includes multiple infrared emitters. When the light curtain assembly housing 204 moves to the top of the limiting plate 208, the position of the infrared emitter at the bottom of the light curtain sensor 205 corresponds to the position of the threshold at the bottom of the wall and the car door opening and closing assembly 1.

[0028] The pivot 216 is movably installed inside the elevator door body 201, the third pulley 214 is movably installed inside the elevator door body 201, and the second pulley 213 is movably installed inside the elevator door body 201.

[0029] Further explanation is needed:

[0030] The elevator door and light curtain assembly 2 plays a fundamental role in structural support and positioning within the elevator light curtain anti-collision device. The dovetail limit rod 202 is movably connected to the light curtain assembly housing 204, ensuring a stable installation position of the light curtain assembly inside the elevator door body 201, while allowing it to shift under specific circumstances. The movable installation of the light curtain assembly housing 204 on one side of the anti-collision strip 203 not only further stabilizes its structure but also enables the light curtain assembly to work in conjunction with the anti-collision strip 203 during operation. The anti-collision strip 203 can, to a certain extent, prevent direct impact of external objects on the light curtain assembly, extending its service life. The limit plate 208 is fixed inside the elevator door body 201, and its horizontal height is lower than the threshold at the bottom of the wall and the car door opening and closing assembly 1. Together with the spring 206, the first cable 207, and other components, it forms a precise position control system, allowing the light curtain assembly to be accurately positioned during operation, avoiding shaking or displacement.

[0031] The transmission and drive system of the elevator door and light curtain assembly 2 plays a crucial role in dynamic adjustment. Components such as the second cable 212, the second pulley 213, the third pulley 214, the winch 215, the rotating shaft 216, the worm gear 217, the worm 218, and the synchronous servo motor 219 constitute a highly efficient transmission network. When the position of the light curtain assembly needs to be adjusted, the synchronous servo motor 219 starts, driving the worm gear 217 to rotate via the worm 218, which in turn drives the rotating shaft 216 to rotate the winch 215, thereby achieving the raising and lowering of the cable. During this process, the second pulley 213 and the third pulley 214 change the direction of the cable's movement to ensure that the cable can accurately transmit power, enabling the light curtain assembly to move in a preset manner to adapt to different working conditions.

[0032] The core function of the elevator door and light curtain assembly 2 is collision detection and response. The light curtain sensor 205 consists of an infrared transmitter and an infrared receiver, which can monitor the area near the elevator door at all times. Once an object blocks the infrared light, the system reacts immediately. The light curtain assembly housing 204 moves under the action of components such as spring 206 and cable. At the same time, the transmission and drive system intervenes to adjust the state of the elevator door in time and prevent the elevator door from closing, thereby effectively avoiding collision accidents and ensuring the safety of passengers.

[0033] The working principle of the above embodiments is as follows:

[0034] First, the basic structure of the equipment provides support for operation. The dovetail limit rod 202 is movably connected to the light curtain component housing 204, allowing the light curtain component to have a stable installation position inside the elevator door body 201, while also having the ability to move under certain circumstances. The light curtain component housing 204 is installed on one side of the anti-collision strip 203, and the two work together. The anti-collision strip 203 can also prevent foreign objects from directly impacting the light curtain component. The limit plate 208 is fixed inside the elevator door body 201, and its horizontal height is lower than the threshold. Together with the spring 206, the first cable 207, etc., it forms a position control system to ensure the precise positioning of the light curtain component.

[0035] Secondly, the power transmission of the transmission system is ready. The second cable 212, the second pulley 213, the third pulley 214, the winch 215, the rotating shaft 216, the worm gear 217, the worm 218, and the synchronous servo motor 219 form a transmission network. When the position of the light curtain component needs to be adjusted, the synchronous servo motor 219 is always on standby to provide a power source for subsequent transmission.

[0036] Next, the transmission system starts to operate. The synchronous servo motor 219 starts, and the worm gear 218 at its output end drives the worm wheel 217 to rotate, which in turn drives the winch 215 to rotate, realizing the raising and lowering of the cable. During this process, the second pulley 213 and the third pulley 214 change the direction of the cable's movement and accurately transmit the power to the light curtain assembly.

[0037] Next, the detection system comes into play. Infrared transmitters and receivers are installed inside the left and right car doors of the elevator door body 201, respectively, as light curtain sensors 205. They constantly monitor the area near the elevator door, forming an invisible detection barrier.

[0038] Finally, the anti-collision response mechanism is activated. Once an object blocks the infrared light, the detection system sends a signal, and the light curtain component housing 204 moves under the action of components such as spring 206 and cable. At the same time, the transmission and drive system quickly intervenes and adjusts the state of the elevator door in a timely manner according to the signal to prevent the elevator door from closing, avoid collision accidents, and ensure passenger safety.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elevator light curtain anti-collision device, comprising a wall and a car door opening and closing assembly (1), characterized in that: The wall and car door opening and closing assembly (1) is equipped with an elevator door and light curtain assembly (2); the elevator door and light curtain assembly (2) includes an elevator door body (201), a dovetail limit rod (202), a collision protection strip (203), a light curtain assembly shell (204), a light curtain sensor (205), a spring (206), a first cable (207), a limit plate (208), a positioning groove (209), a limit groove (210), and a first pulley (211). The elevator door body (201) includes left and right car door panels. The dovetail limit rod (202) is fixedly installed inside the elevator door body (201). The collision protection strip (203) is fixedly installed inside the elevator door body (201). A light curtain assembly housing (204) is movably installed on one side of the limiting rod (202). A light curtain sensor (205) is provided on one side of the light curtain assembly housing (204). A spring (206) is provided at the bottom of the light curtain assembly housing (204). A first cable (207) is also fixedly connected to the bottom of the light curtain assembly housing (204). A limiting plate (208) is fixedly connected to the bottom of the spring (206). Positioning grooves (209) are provided on both the left and right sides of the limiting plate (208). A limiting groove (210) is provided on the other side of the limiting plate (208). A first pulley (211) is movably installed inside the limiting groove (210). The first pulley (211) is movably connected to one side of the first cable (207).

2. The elevator light curtain anti-collision device according to claim 1, characterized in that: The elevator door and light curtain assembly (2) also includes a second cable (212), a second pulley (213), a third pulley (214), a winch (215), a shaft (216), a worm gear (217), a worm (218), a synchronous servo motor (219), and a motor mounting plate (220). The second cable (212) is fixedly connected to the bottom of the first cable (207). The second pulley (213) is movably connected to one side of the second cable (212), and the third pulley (214) is movably connected to the other side of the second cable (212). The end of the wheel (214) is fixedly connected to one side of the winch (215). The shaft (216) is fixedly installed on the axis of the winch (215). A worm gear (217) is fixedly sleeved on one side of the shaft (216). A worm (218) is meshed on one side of the worm gear (217). The worm (218) is fixedly installed at the bottom of the output end of the synchronous servo motor (219). A motor mounting plate (220) is fixedly installed on the top of the synchronous servo motor (219). The motor mounting plate (220) is fixedly installed inside the elevator door body (201).

3. The elevator light curtain anti-collision device according to claim 1, characterized in that: The interior of the wall and car door opening and closing assembly (1) is provided with a drive device for controlling the opening and closing of the car door and a slide rail at the bottom of the car door. The interior of the wall and car door opening and closing assembly (1) is reserved with space for the opening and closing of the elevator door body (201). The bottom of the wall and car door opening and closing assembly (1) is provided with a threshold, and the height of the top of the threshold is flush with the ground.

4. The elevator light curtain anti-collision device according to claim 1, characterized in that: The light curtain sensor (205) inside the car door on the left side of the elevator door body (201) is an infrared emitting device, and the light curtain sensor (205) inside the car door on the right side of the elevator door body (201) is an infrared receiving device.

5. The elevator light curtain anti-collision device according to claim 1, characterized in that: The light curtain assembly housing (204) is movably connected to one side of the anti-collision strip (203), and the light curtain assembly housing (204) has a dovetail groove at the corresponding position of the dovetail limiting rod (202).

6. The elevator light curtain anti-collision device according to claim 1, characterized in that: The limiting plate (208) is fixedly installed inside the elevator door body (201). The horizontal height of the limiting plate (208) is lower than the threshold at the bottom of the wall and the car door opening and closing assembly (1). The light curtain sensor (205) includes multiple infrared emitters. When the light curtain assembly housing (204) moves to the top of the limiting plate (208), the position of the infrared emitter at the bottom of the light curtain sensor (205) corresponds to the position of the threshold at the bottom of the wall and the car door opening and closing assembly (1).

7. The elevator light curtain anti-collision device according to claim 2, characterized in that: The rotating shaft (216) is movably installed inside the elevator door body (201), the third pulley (214) is movably installed inside the elevator door body (201), and the second pulley (213) is movably installed inside the elevator door body (201).

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