Automatic closing device for elevator door on construction site and using method of automatic closing device

Abstract

The invention discloses a construction site elevator door automatic closing device and a using method thereof.The device comprises an elevator car, inner door control mechanisms and landing door control mechanisms, the inner door control mechanisms are arranged at the front end of the elevator car, the landing door control mechanisms are arranged on all floors of a building, the positions of the landing door control mechanisms correspond to the positions of the inner door control mechanisms, and inner doors are slidably connected with the elevator car; a lifting block at the top of the rear side wall is connected with a worm, the bottom end of the worm is rotatably connected with the top of the elevator car, a second belt pulley is externally connected, and a first belt pulley at the output end of a motor at the top of the elevator car is in transmission connection with the second belt pulley through a belt; the landing door is arranged at the stopping front end of an elevator car, the guide frame is installed at the bottom of a building top plate, the output end of the motor is connected with a screw, the screw penetrates through the side wall of the guide frame and is rotationally connected with the inner side wall of the other end, and the two ends of the screw are connected with T-shaped guide blocks which are fixed to the top of the landing door. Linkage automatic closing of the inner door and the landing door is achieved, clamping injury is prevented, and it is guaranteed that the landing door can be closed and locked only after the inner door is in place.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building construction, and more specifically relates to a building site elevator door automatic closing device and a use method thereof. BACKGROUND

[0002] Construction elevator, also known as construction hoist, as the key vertical transportation equipment in modern high-rise and super high-rise building construction, is like the "vertical artery" connecting the ground and each working floor, and plays a crucial role in the whole construction period. Its core value is to build an efficient, safe and stable personnel and cargo transportation channel for the complex construction site, and runs through the key stages such as high-rise building main structure construction, curtain wall installation and interior decoration. From the orderly transportation of a large number of construction personnel, to the timely transportation of building materials such as steel bars, cement and glass, to the floor allocation of tools and equipment such as scaffolding and electric welders, and even to the centralized cleaning and transportation of construction waste, construction elevator bears the responsibility of continuous, fast and orderly transportation, which is directly related to the promotion efficiency of construction progress and the overall coordination of site operation.

[0003] In order to improve safety and automation level, construction elevator has been equipped with a layer door automatic closing device, but the existing device still has many deficiencies to be solved in practical application. Firstly, the closing of the layer door relies too much on manual operation. Construction personnel often forget to close the layer door due to negligence or laziness in busy work, which leads to the formation of an open gap between the elevator shaft and the working floor, and easily causes safety accidents such as personnel falling and material falling, which poses a serious hidden danger to the construction site. Secondly, the closing of the inner door of the elevator also relies on manual operation, which not only increases the operation burden of workers and reduces the transportation turnover efficiency, but more importantly, lacks an effective detection mechanism for the closing state. When the inner door has not been completely closed, the layer door may have started the closing program. This time sequence disorder is easy to cause safety problems such as personnel being pinched and materials being stuck, which seriously threatens the life safety of construction personnel and the normal operation of equipment. These defects make the existing automatic closing device difficult to meet the high standard requirements of modern building construction on safety protection and work efficiency, and it is urgent to realize the automatic linkage control and accurate state detection of the inner door and the layer door through technical improvement to fundamentally avoid the risks caused by human operation errors. SUMMARY

[0004] In order to solve the above defects or improvement needs of the prior art, the present application provides a construction site elevator door automatic closing device and a use method thereof. The inner door is automatically closed through the synergistic effect of the motor, the first belt pulley, the belt, the second belt pulley and the worm. At the same time, the pressure sensor is used to detect whether the inner door is closed in place. If not, the alarm on the control box will sound an alarm to avoid the safety risk of elevator operation when the inner door is not closed tightly. The hidden danger that workers are easy to forget to close the door is solved, and the automatic closing of the inner door is ensured. The screw rod with reverse threads at both ends is driven by the motor to drive the guide block and the landing door to complete the automatic opening and closing. During the closing process of the landing door, the infrared sensor monitors in real time. If an object or a worker is detected between the landing doors, the motor will immediately stop to prevent injury. In addition, the color sensor is used to detect the green identification plate signal when the inner door is closed in place. After the inner door is completely closed, the main control unit drives the landing door to close, realizing the automatic linkage of the inner door and the landing door, avoiding manual operation errors and injury risks. At the same time, after the landing door is completely closed, the electromagnetic lock is automatically locked to prevent accidental opening, solving the problem that the landing door is easily opened at will.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a construction site elevator door automatic closing device is provided, comprising an elevator car, an inner door control mechanism and a landing door control mechanism, the elevator car is a box structure with an open front end, and the inner door control mechanism is arranged at the front end of the elevator car, the landing door control mechanism is arranged in each floor of the building, and the positions of the two correspond to each other; wherein, The inner door control mechanism comprises an inner door, a lifting block, a motor, a first belt pulley, a belt, a second belt pulley and a worm. The inner door is arranged at the front end of the elevator car and is slidably connected with the elevator car, so as to slide up and down along the two sides of the elevator car. A lifting block is fixedly installed on the top of the middle of the rear side wall of the inner door. A threaded hole with internal threads is formed in the middle of the lifting block, and a worm is threadedly connected with the threaded hole. The bottom end of the worm is rotatably connected with the top of the elevator car. The second belt pulley is threadedly connected with the outside of the worm. The motor is fixedly installed on the top of the elevator car. The output end of the motor is fixedly installed with the first belt pulley. The first belt pulley is drivingly connected with the second belt pulley through the belt. The landing door control mechanism comprises two landing doors, a guide frame, a motor, a screw rod and a guide block. The two landing doors are located at the front end of each elevator car stop. The guide frame is fixedly installed on the bottom of the top plate of each building. The guide frame is provided with a downward recess. A motor is fixedly installed on one side end of the guide frame. The output end of the motor is fixedly installed with a screw rod. The screw rod penetrates through the side wall of the guide frame and is rotatably connected with the inner side wall of the other end. The two ends of the screw rod are respectively provided with external threads with opposite rotation directions. T-shaped guide blocks are threadedly connected with the external threads with opposite rotation directions of the screw rod respectively. The guide blocks are fixedly connected with the top of the two landing doors respectively.

[0006] Further, the elevator car top is fixedly installed with a main controller, a backup power supply and a solar panel, the elevator car inner side wall is fixedly installed with a control box, the solar panel is electrically connected with the backup power supply, and the backup power supply is electrically connected with the main controller and the control box.

[0007] Further, the control box is installed with an emergency stop button and an alarm.

[0008] Further, the inner door bottom is fixedly installed with a pressure sensor for detecting whether the inner door is closed in place.

[0009] Further, the layer door control mechanism further comprises an identification plate and a color sensor, the identification plate is fixedly installed at the middle top of the inner door front side wall, the color sensor is fixedly installed at the middle of the rear end of the guide frame, and the positions of the two correspond to each other, and the color sensor is wirelessly connected with the main controller through a wireless transmission module.

[0010] Further, the color of the identification plate is green, and the color sensor matched therewith is an RGB color sensor.

[0011] Further, the layer door control mechanism further comprises an infrared sensor and an electromagnetic lock, two oppositely arranged infrared sensors are fixedly installed on the front side walls of the two layer doors, and the infrared sensors are wirelessly connected with the main controller through a wireless transmission module, and the electromagnetic lock is fixedly installed on the front side wall of the layer door.

[0012] Further, the layer door control mechanism further comprises a data processor and a sensor, the data processor is fixedly installed at the middle top of the inner cavity of the guide frame, the sensor is fixedly installed at the middle bottom of the inner cavity, the data processor is electrically connected with the sensor and the motor respectively, and the data processor is wirelessly connected with the main controller through a wireless module.

[0013] Further, an auxiliary assembly is further included, which comprises a turning plate, a guide plate, a handrail, a traction shaft, a pull rope and an electric winding reel, the turning plate is rotationally connected with the bottom end of the side wall of the elevator car, the guide plate is fixedly installed at the front end of the turning plate, the handrails are fixedly installed at the top of the two sides of the turning plate, the traction shafts are fixedly installed inside the two ends of the front side of the turning plate, the electric winding reels are fixedly installed on the two side walls inside the elevator car, the pull rope is wound on the electric winding reel, the other end of the pull rope is fixedly connected with the traction shaft, and the electric winding reels are electrically connected with the control box and the backup power supply respectively.

[0014] According to the second aspect of the present application, a use method of a construction site elevator door automatic closing device is provided, which is realized by using the construction site elevator door automatic closing device, and comprises the following steps. S100: When the elevator car runs to the specified floor, the corresponding floor door is opened, and then the inner door can be opened, and then the flap is lowered by the control box, and the building materials to be transported are carried into the elevator car; S200: After the carrying operation is completed, the control box in the elevator car is controlled to control the synchronous operation of the two electric winding drums on both sides, so that the pull rope is wound, thereby driving the flap to be flipped upward and recovered to the inside of the elevator car; S300: Then the motor is started to run, the first pulley is rotated, the second pulley is synchronously rotated under the transmission action of the belt, and the worm is rotated, the lifting block is lowered, and then the inner door is lowered to close, When the inner door is closed in place, the pressure sensor at the bottom thereof detects the pressure signal, indicating that the inner door is closed in place, at this time, the alarm on the control box does not alarm, otherwise, when the inner door is not closed in place, the alarm on the control box alarms, reminding the worker; S400: After the inner door is closed in place, the identification plate at the top of the inner door is just at the rear end of the color sensor, when the color sensor detects a green signal, data is sent to the main controller through the wireless communication module, and the flap is recovered in the elevator car by the sensor, the data processor transmits data to the main controller, and the main controller controls the motor to run, the motor drives the screw to rotate, and the two guide blocks move towards each other, thereby driving the two floor doors to fold and close in the middle; S500: During the closing of the floor door, the infrared sensor on both sides detects whether there is something moving between the two floor doors when the floor door is closed, if the infrared sensor detects an object, the motor is immediately stopped by the main controller, so that the floor door stops closing, preventing injury, and if the infrared sensor does not detect an object, the floor door is stably closed, and the electromagnetic lock is locked after the floor door is closed, ensuring that the floor door will not be accidentally opened after being closed.

[0015] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects: 1. The elevator door automatic closing device of the present application realizes the automatic closing of the inner door through the cooperation of the motor, the first pulley, the belt, the second pulley and the worm, when the inner door is lowered and closed, the pressure sensor contacts and extrudes the inner side bottom surface of the elevator car, which can accurately detect whether the inner door is closed in place, if the pressure sensor does not detect pressure, it means that the inner door is not closed in place, at this time, the alarm on the control box will immediately alarm to remind the worker to handle in time, effectively avoiding the safety risk of starting the elevator car to run up and down when the inner door is not closed in place, solving the safety hidden danger caused by the worker often forgetting to close the inner door, and finally realizing the automatic closing of the inner door and ensuring that the inner door is closed in place.

[0016] 2. The elevator door automatic closing device of the present application, by motor, screw rod realizes the automatic opening and closing of the floor door, wherein the screw rod is provided with opposite screw threads at both ends, under the driving of the motor, the screw rod rotates and drives the guide blocks on both sides to move reversely, thereby dragging the two floor doors to complete the automatic closing and opening operation, during the automatic closing of the two floor doors, the infrared sensor installed on the floor door monitors in real time, if it is detected that there is a worker between the two floor doors, the infrared sensor will immediately send a signal to stop the rotation of the motor, and the floor door also stops closing, solving the problem of workers being easily injured during the closing of the floor door, and effectively preventing the floor door from injuring the workers.

[0017] 3. The elevator door automatic closing device of the present application, by the color sensor, the color data of the identification plate is obtained, when the color sensor faces the identification plate and detects the green signal, the color sensor transmits the detection result to the main controller through the wireless transmission module, after the main controller receives the signal of "detecting green", it immediately sends an operation instruction to the motor to drive the floor door to start closing, only when the inner door is completely closed and drives the identification plate to reach the specified position, the color sensor successfully detects the green signal, and the floor door starts the closing action, fundamentally avoiding the risk of injury caused by the inner door not being closed and the floor door acting in advance, improving the safety of the equipment operation, at the same time, through the automatic signal transmission and judgment, the error caused by manual intervention is reduced, the accuracy and coordination of the door body action are ensured, the problem of manually closing the inner door and the floor door is solved, and the effect of automatic closing linkage of the inner door and the floor door is achieved.

[0018] 4. The elevator door automatic closing device of the present application, by the infrared sensor, whether there is an object moving between the two floor doors during the closing of the floor door is detected, when the infrared sensor detects an object, it will immediately trigger a signal to stop the rotation of the motor, and the floor door stops closing, when the infrared sensor does not detect an object, the floor door can smoothly complete the closing action, when the floor door is completely closed, the electromagnetic lock will automatically start and lock the floor door, ensuring that the floor door will not be accidentally opened in the closed state, solving the problem of the floor door possibly injuring the object during closing and the floor door being easily opened at will, and realizing the prevention of injury and the protection of the floor door from being accidentally opened after closing. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the building site elevator door automatic closing device of the embodiment of the present application; Figure 2 It is a structure schematic view of the opening of the inner door and the floor door of the building site elevator door automatic closing device of the embodiment of the present application; Figure 3 It is an internal structure schematic view of the elevator car of the building site elevator door automatic closing device of the embodiment of the present application; Figure 4It is a stereoscopic structure schematic view of an inner door of a construction site elevator door automatic closing device according to an embodiment of the present application; Figure 5 It is a sectional structure schematic view of a guide frame of a construction site elevator door automatic closing device according to an embodiment of the present application; Figure 6 It is a sectional structure schematic view of a guide frame of a construction site elevator door automatic closing device according to an embodiment of the present application; Figure 5 It is a local enlarged structure schematic view of A in the figure; Figure 7 It is a structure schematic view of an auxiliary assembly of a construction site elevator door automatic closing device according to an embodiment of the present application; Figure 8 It is a flow schematic view of a use method of a construction site elevator door automatic closing device according to an embodiment of the present application.

[0020] In all the figures, same reference signs represent same technical features, specifically: 1-elevator car, 2-master controller, 3-backup power supply, 4-solar panel, 5-inner door, 51-pressure sensor, 6-lifting block, 7-identification plate, 8-motor, 9-first belt pulley, 10-belt, 11-second belt pulley, 12-worm, 13-control box, 14-auxiliary assembly, 141-flap, 142-guide plate, 143-handrail, 144-pulling shaft, 145-pull rope, 146-electric winding reel, 15-layer door, 16-infrared sensor, 17-electromagnetic lock, 18-guide frame, 19-motor, 20-screw rod, 21-guide block, 22-color sensor, 23-data processor, 24-sensor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present application clearer and more comprehensible, the present application is further described in detail below in combination with the figures and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as there is no conflict.

[0022] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the figures), if the certain posture changes, the directional indications also change accordingly.

[0023] In addition, if the description involves "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0024] In this patent, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "include" do not exclude the existence of other same elements in the process, method, article or device including the elements.

[0025] Embodiment 1 As Figures 1-7As shown, the building site elevator door automatic closing device provided by the embodiment of the application comprises an elevator car 1, a main controller 2, a backup power supply 3, a solar panel 4, a control box 13, an inner door control mechanism, a landing door control mechanism and an auxiliary mechanism 14. The elevator car 1 is a box structure with an open front end, and the front end is provided with the inner door control mechanism. The landing door control mechanism is arranged in each floor of the building, and is located at the front end of the inner door control mechanism. The main controller 2, the backup power supply 3 and the solar panel 4 are fixedly installed on the top of the elevator car 1. The solar panel 4 is electrically connected with the backup power supply 3. The control box 13 is fixedly installed on the inner side wall of the elevator car 1. The backup power supply 3 is electrically connected with the main controller 2 and the control box 13. The control box 13 is electrically connected with the auxiliary mechanism 14. The auxiliary mechanism is controlled by the control box 13 to lower and retract, so that the building materials in and out of the elevator car 1 are transported. The automatic closing function of the landing door and the inner door can avoid the risk of personnel and material falling due to the negligence or hurried work of workers, isolate the mechanical parts in the elevator shaft and the falling objects from the high altitude, prevent personnel from entering the elevator shaft during non-elevator operation period, and avoid the misoperation of the “landing door opening and the car not arriving” through the linkage of the inner door control mechanism and the landing door control mechanism. It can also improve the construction efficiency, reduce the waste of elevator downtime and round trip time caused by waiting for closing or forgetting to close, speed up the construction material transportation and personnel turnover speed, the main controller can automatically control the opening and closing of the landing door according to the elevator operation state, adapt to the dynamic demand of frequent start and stop and multi-layer operation in construction, reduce the labor coordination cost. In terms of energy supply, the solar panel charges the backup power supply, reduces the dependence on the temporary power supply system of the construction site, reduces the electricity cost and cable arrangement pressure, and the backup power supply can supply power to the main controller, the control box and other core components in the event of power failure, ensuring the normal closing of the landing door, adapting to the unstable power supply environment of the construction site, and ensuring the stable operation of the device under complex power supply conditions.

[0026] Further, the control box 13 is provided with an emergency stop button and an alarm, which adds double protection for the safe operation of the building site elevator. The emergency stop button is a forced intervention device in emergency situations, which can be triggered quickly by the workers on site when the inner door of the elevator runs abnormally (such as jamming, misplacement), personnel misoperation or sudden safety danger, instantly cuts off the power supply of the core components such as the motor and the main controller, forces the inner door and the elevator car to stop all actions, avoids the continuous expansion of the dangerous situation, gains valuable time for emergency treatment, and maximizes the reduction of accident losses. The alarm can predict abnormal situations such as the inner door not being closed in place, and can timely remind the surrounding workers to pay attention to the equipment state through sound and light signals (such as high-decibel buzzing and flashing light), which can not only facilitate the quick troubleshooting and solution of the problem of the inner door not being closed in place, but also can avoid safety accidents such as personnel falling and material falling caused by the inner door not being closed tightly during the elevator operation.

[0027] The inner door control mechanism comprises an inner door 5, a lifting block 6, a motor 8, a first belt pulley 9, a belt 10, a second belt pulley 11 and a worm 12; wherein the inner door 5 is arranged at the front end of the elevator car 1 and is in sliding connection with the elevator car 1, and can slide up and down along the two sides of the elevator car 1; the lifting block 6 is fixedly installed at the middle top of the rear side wall of the inner door 5, a threaded hole with internal threads is formed in the middle of the lifting block 6, the worm 12 is connected to the lifting block 6 through threads, and the bottom end of the worm 12 is rotatably connected to the top of the elevator car 1; the second belt pulley 11 is threadedly connected to the outside of the worm 12, and the second belt pulley 11 is located below the lifting block 6; the motor 8 is fixedly installed on the top of the elevator car 1, and the output end of the motor 8 is fixedly installed with the first belt pulley 9; the first belt pulley 9 is in transmission connection with the second belt pulley 11 through the belt 10.

[0028] Further, the motor 8 is electrically connected with the backup power supply 3 and the main controller 2 respectively, wherein the backup power supply 3 provides stable working power for the motor 8 to ensure that it can obtain continuous power supply under various working conditions; and the main controller 2 is responsible for accurately controlling the running state of the motor 8, including driving the motor 8 to start or stop, so as to realize automatic operation of the entire inner door control mechanism.

[0029] Further, the motor 8 is a reversible motor, which means that it can realize forward rotation and reverse rotation. The working principle of the reversible motor is based on changing the phase sequence of the motor power supply to realize the change of the rotation direction, allowing the motor to run in different directions as needed.

[0030] Specifically, when it is necessary to control the opening or closing of the inner door 5, the main controller 2 sends a control instruction to drive the motor 8 to rotate forward or reversely. The output shaft of the motor 8 will synchronously drive the first belt pulley 9 fixedly connected thereto to rotate. Since the outer sides of the first belt pulley 9 and the second belt pulley 11 are provided with the belt 10 in a tensioning state, the rotating movement of the first belt pulley 9 is transmitted to the second belt pulley 11 through the belt 10 under the action of friction, so that the second belt pulley 11 rotates in the same direction as the first belt pulley 9. Since the second belt pulley 11 is in thread connection with the worm 12 and is relatively fixed, the rotation of the second belt pulley 11 will directly drive the worm 12 to rotate synchronously. At this time, the lifting block 6 cooperating with the worm 12 through the threaded hole will convert the rotating movement of the worm 12 into its linear movement under the helical transmission action of the worm 12. When the motor 8 rotates forward, the worm 12 rotates forward, and the lifting block 6 moves upward along the worm 12, thereby driving the inner door 5 to slide upward along the two sides of the elevator car 1 to realize opening; when the motor 8 reversely rotates, the worm 12 reversely rotates, and the lifting block 6 moves downward along the worm 12, thereby driving the inner door 5 to slide downward along the two sides of the elevator car 1 to realize closing.

[0031] Further, the inner door 5 bottom is fixedly installed with a pressure sensor 51 for detecting whether the inner door 5 is closed in place.

[0032] Specifically, when the inner door is lowered and closed, the pressure sensor 51 installed at the bottom of the inner door will contact and be pressed by the inner side bottom surface of the elevator car, so that the pressure sensor 51 can accurately detect whether the inner door is closed in place. If the pressure sensor does not detect a pressure signal, it indicates that the inner door has not been completely closed. At this time, the alarm on the control box will immediately sound an alarm to prompt the on-site workers to pay attention and handle it in time, effectively avoiding the increased safety risk of starting the elevator car 1 up and down operation due to the inner door not being closed in place. It can solve the safety hidden danger caused by workers often forgetting to close the inner door when they are busy, and finally achieve the good effect of automatic closing of the inner door and ensuring that it is closed in place.

[0033] The landing door control mechanism comprises two landing doors 15, a guide frame 18, a motor 19, a screw rod 20 and a guide block 21. The two landing doors 15 are located at the front end of each elevator car 1 stop and at the front end of the inner door. The guide frame 18 is fixedly installed at the bottom of the top plate of each floor of the building, and the guide frame 18 is provided with a downward recess. A motor 19 is fixedly installed at one side end of the guide frame 18. A screw rod 20 is fixedly installed at the output end of the motor 19, and the screw rod 20 penetrates through the side wall of the guide frame 18 and is rotationally linked with the inner side wall at the other end. The screw rod 20 is provided with opposite external threads at both ends. T-shaped guide blocks 21 are threadedly connected to the opposite external threads of the screw rod 20. The guide blocks 21 are fixedly connected to the top of the two landing doors 15. The guide frame 18 provides a precise movement track for the guide blocks 21, so that the guide blocks 21 will not deviate from the preset path when moving the landing doors 15, effectively avoiding the problems of jamming and collision of the landing doors due to shaking and deviation, and ensuring the smoothness of the opening and closing process of the landing doors. The opposite external threads at both ends of the screw rod 20 can synchronously drive the two guide blocks 21 to move in opposite directions or in reverse directions through one rotation action, so that the opening and closing amplitudes of the two landing doors 15 are completely consistent, which not only ensures the close fit when closed, but also ensures the symmetry and beauty when opened, avoiding the safety hidden danger caused by abnormal displacement of a single landing door. The automatic opening and closing realized by mechanical transmission not only reduces the tediousness of manual operation, but also ensures the stability and safety of the landing door movement through structural design, which is suitable for the high-frequency and high-load use requirements of construction sites.

[0034] Further, the motor 19 is a forward and reverse motor, which means that the motor can realize forward rotation and reverse rotation, allowing the motor to run in different directions as needed.

[0035] Specifically, the opening and closing of the landing door 15 is precisely controlled by the forward and reverse rotation of the motor 19. When the elevator car 1 reaches the target floor and stops stably, if the landing door needs to be opened, the motor 19 rotates forward, and its output end drives the screw rod 20 to rotate forward synchronously. Since the screw rod 20 has opposite threads at both ends, and the two threads are in threaded cooperation with the two T-shaped guide blocks 21 respectively, under the rotation of the screw rod 20, the two guide blocks 21 will move relatively along the groove at the bottom of the guide frame 18, i.e. move away from each other. At this time, the two landing doors 15 fixedly connected to the top of the guide blocks 21 will translate to both sides with the movement of the guide blocks 21, gradually opening the passage, until the guide blocks 21 trigger the side wall of the guide frame 18, and the motor 19 stops working. When the landing door needs to be closed, the motor 19 receives a reverse rotation instruction, and the screw rod 20 rotates reversely, and the two reverse threads drive the two guide blocks 21 to move towards each other along the groove, i.e. move towards each other. The two landing doors 15 connected thereto then translate to the middle synchronously, gradually closing, until the edges fit to form a complete closed state, at which time the motor 19 stops working.

[0036] Further, the main control unit 2 is wirelessly connected with the motor 19 through a wireless transmission module, and the opening and closing of the motor 19 is controlled by the main control unit 2.

[0037] Further, the landing door control mechanism further comprises an identification plate 7 and a color sensor 22; wherein the identification plate 7 is fixedly installed at the middle top of the front side wall of the inner door, and the color sensor 22 is fixedly installed at the middle of the rear end of the guide frame 18, and the positions of the two correspond to each other. The color sensor 22 identifies and detects the identification plate 7, and the color sensor 22 is wirelessly connected with the main control unit 2 through a wireless transmission module.

[0038] Further, the color of the identification plate 7 is green, and the color sensor 22 matched therewith is an RGB color sensor. Its working principle is to obtain the color data of the identification plate 7 through the built-in red, green and blue color filters, and to convert the light signals into corresponding RGB values. These values are transmitted to the microcontroller, and the microcontroller analyzes and compares the RGB values. When the detected values meet the preset green color parameter range, it is determined that the identification plate 7 is green.

[0039] When the inner door 5 is lowered and closed, the identification plate 7 fixed to the middle top end of the front side wall of the inner door 5 is also moved downward synchronously. When the inner door 5 is completely closed in place, the identification plate 7 is just at the rear side of the color sensor 22, at this time, the color sensor 22 is opposite to the identification plate 7 and detects a green signal. Then, the color sensor 22 transmits the detection result to the main controller 2 through the wireless transmission module. After receiving the signal of "detecting green", the main controller 2 immediately sends an operation instruction to the motor 19 to drive the layer door 15 to start closing. Only when the inner door 5 is completely closed and drives the identification plate 7 to reach the specified position, so that the color sensor 22 successfully detects the green signal, the layer door 15 will start the closing action. In this way, the risk of being pinched caused by the layer door 15 acting in advance before the inner door 5 is completely closed is fundamentally avoided, the safety of the equipment operation is improved, and the accuracy and coordination of the door action are ensured through automatic signal transmission and judgment, and the error caused by manual intervention is reduced.

[0040] Further, the layer door 15 control mechanism further comprises an infrared sensor 16 and an electromagnetic lock 17. Two oppositely arranged infrared sensors 16 are fixedly installed on the front side wall of the two layer doors 15, and the infrared sensors 16 are wirelessly connected with the main controller 2 through the wireless transmission module. Meanwhile, the electromagnetic lock 17 is also fixedly installed on the front side wall of the layer door 15, and the electromagnetic lock 17 is wirelessly connected with the main controller 2.

[0041] Specifically, during the closing process of the layer door 15, the two oppositely arranged infrared sensors 16 will detect in real time. If it is detected that there is a worker between the two layer doors, the infrared sensor 16 will immediately send a signal to stop the motor 19 from rotating through the main controller 2, and the two layer doors 15 will also stop closing, thereby effectively preventing the layer door from pinching the worker. When the layer door 15 is completely closed, the electromagnetic lock 17 will be automatically started and locked through the main controller, so as to ensure that the layer door 15 will not be accidentally opened in the closed state, and the problems that the layer door 15 may pinch the worker and the layer door 15 is easily opened at will are solved, and the pinching accident is prevented and the layer door 15 is ensured not to be accidentally opened after being closed.

[0042] Further, the data processor 22 is fixedly installed in the middle of the top of the inner cavity of the guide frame 18, and the sensor 24 is fixedly installed in the middle of the bottom of the inner cavity of the guide frame 18, and the data processor 22 is electrically connected with the sensor 24 and the motor 19 respectively, and the data processor 22 is wirelessly connected with the main controller 2 through a wireless module. When the auxiliary assembly 14 is flipped up and retracted into the inside of the elevator car, the sensor 24 will detect this state in real time and transmit the detection signal to the data processor 22, and the data processor 22 will transmit the relevant data to the main controller 2 after processing the signal, and the main controller 2 will send operation instructions to the motor 19. After the motor 19 is started, the screw rod 20 is driven to rotate, so that the two guide blocks 21 move reversely along the screw rod 20 to the middle part, thereby driving the two layer doors 15 to close to the middle, realizing the linkage effect of automatic closing of the layer door 15 after the inner door 5 is closed, and through the detection and data transmission of the sensor 24, the accurate control is realized, so that only after the inner door 5 is completely closed, the layer door 15 will start the closing action, thereby ensuring the orderliness and safety of the door operation.

[0043] Further, the main power supply system introduces three-phase alternating current from the distribution box of the construction site, and after being stepped down and rectified by the transformer in the elevator control cabinet, outputs the direct current power suitable for each component and is connected to the infrared sensor 16, the electromagnetic lock 17, the guide frame 18, the motor 19, the color sensor 22, the data processor 23 and the sensor 24 through the branch wires.

[0044] The auxiliary assembly 14 includes a flip plate 141, a guide plate 142, a handrail 143, a traction shaft 144, a pull rope 145 and an electric winding drum 146; wherein the flip plate 141 is rotationally connected with the bottom end of the side wall of the elevator car 1, the guide plate 142 is fixedly installed at the front end of the flip plate 141, the handrails 143 are fixedly installed on the top of the two sides of the flip plate 141, the traction shafts 144 are fixedly installed inside the two ends of the front side of the flip plate 141, the electric winding drums 146 are fixedly installed on the inside of the two side walls of the elevator car 1, the pull rope 145 is wound on the electric winding drum 146, the other end of the pull rope 145 is fixedly connected with the traction shaft 144, and the electric winding drum 146 is electrically connected with the control box 13 and the backup power supply 3 respectively, the electric winding drum 146 is controlled by the control box 13 to wind and unwind the pull rope 145, thereby realizing the lowering and recovery of the flip plate 141.

[0045] Specifically, the control box 13 controls the electric reel 146 to wind and unwind the pull rope 145. When it is necessary to retract the flap 141, the control box 13 sends a winding command to the electric reel 146. The drive motor inside the reel starts and rotates clockwise, gradually winding the pull rope 145 connected to the traction shaft 144 onto the reel body. As the pull rope 145 tightens, it generates an upward pulling force on the traction shafts 144 at both ends of the front side of the flap 141, causing the flap 141 to... The connection point on the side wall of the elevator car 1 is used as a fulcrum to flip upwards until it is completely retracted into the car. At this time, the electric reel 146 triggers the limit switch to stop working. When it is necessary to lower the flap 141, the control box 13 issues a release command. The reel drive motor rotates counterclockwise, and the pull rope 145 is gradually released under the weight of the flap 141 itself. The flap 141 then flips downwards and unfolds until the guide plate 142 is smoothly connected to the floor, completing the construction of the passage for materials or personnel to go up and down.

[0046] Example 2 Combination Figures 1-7 ,like Figure 8 As shown, the present invention provides a method for using an automatic closing device for elevator doors at construction sites. The method utilizes the aforementioned automatic closing device for elevator doors at construction sites, and the specific steps are as follows: S100: When the elevator car 1 reaches the designated floor, the inner door 5 can only be opened after the floor door 15 of the corresponding floor is opened. Then, the flap 141 is lowered through the control box 13 to transport the building materials to be transported into the elevator car 1. S200: After the transport operation is completed, the control box 13 inside the elevator car 1 controls the two electric reels 146 on both sides to run synchronously, so that the pull rope 145 is wound up, thereby driving the flip plate 141 to flip up and retract into the elevator car 1. S300: Next, start the motor 8 to run, driving the first pulley 9 to rotate. Under the transmission action of the belt 10, the second pulley 11 rotates synchronously and drives the worm gear 12 to rotate. The worm gear 12 drives the lifting block 6 to descend, thereby driving the inner door 5 to descend and close. When the inner door is closed, the pressure sensor 51 at its bottom will detect a pressure signal, indicating that the inner door is closed. At this time, the alarm on the control box 13 will not sound an alarm. Conversely, when the inner door 5 is not closed, the alarm on the control box 13 will sound an alarm to remind the workers to pay attention. S400: After the inner door 5 is closed to the position, the identification plate 7 at the top of the inner door 5 is just at the rear end of the color sensor 22, when the color sensor 22 detects the green signal, the data is sent to the host controller 2 through the wireless communication module, and the sensor 24 detects the flip plate 141 to be folded up and withdrawn in the elevator car, the data processor 23 transmits the data to the host controller 2, and the host controller 2 controls the motor 19 to run, the motor 19 drives the screw rod 20 to rotate, and the two guide blocks 21 move to the direction of approaching each other, thereby driving the two landing doors 15 to fold and close to the middle; S500: During the closing process of the landing door 15, the infrared sensor 16 on both sides detects whether there is something moving between the two landing doors 15 when the landing door 15 is closed. If the infrared sensor 15 detects an object, the motor 19 will immediately stop rotating to stop the closing of the landing door 15 immediately through the host controller 2, preventing injury. When the infrared sensor 16 does not detect an object, the landing door 15 is stably closed, and when the landing door is closed, it is locked by the electromagnetic lock 17 to ensure that the landing door will not be accidentally opened after being closed.

[0047] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic closing device for elevator doors at construction sites, characterized in that, It includes an elevator car (1), an inner door control mechanism, and a landing door control mechanism. The elevator car (1) is a box-shaped structure with an open front end. The inner door control mechanism is located at the front end of the car. The landing door control mechanisms are located on each floor of the building, and the two are positioned correspondingly. The inner door control mechanism includes an inner door (5), a lifting block (6), a motor (8), a first pulley (9), a belt (10), a second pulley (11), and a worm gear (12). The inner door (5) is located at the front end of the elevator car (1) and is slidably connected to the elevator car (1). It can slide up and down along both sides of the elevator car (1). The lifting block (6) is fixedly installed at the top of the middle of the rear side wall of the inner door (5). A threaded hole with internal thread is opened in the middle of the block, and a worm gear (12) is connected to it by thread. The bottom end of the worm gear (12) is rotatably connected to the top of the elevator car (1). The second pulley (11) is connected to the outside of the worm gear (12). The motor (8) is fixedly installed at the top of the elevator car (1). The first pulley (9) is fixedly installed at the output end of the motor (8). The first pulley (9) is connected to the second pulley (11) by the belt (10). The landing door control mechanism includes two landing doors (15), a guide frame (18), a motor (19), a screw (20), and a guide block (21). The two landing doors (15) are located at the front end of the elevator car (1) on each floor. The guide frame (18) is fixedly installed at the bottom of the roof slab of each floor. The guide frame (18) has a groove with the slot facing downward. A motor (19) is fixedly installed on one end of the guide frame (18). A screw (20) is fixedly installed at the output end of the motor (19). The screw (20) passes through the side wall of the guide frame (18) and is rotatably connected to the inner side wall of the other end. The two ends of the screw (20) are respectively provided with external threads with opposite directions. T-shaped guide blocks (21) are threadedly connected to the two external threads with opposite directions on the two sections of the screw (20). The guide blocks (21) are respectively fixedly connected to the top of the two landing doors (15).

2. The automatic closing device for elevator doors at construction sites according to claim 1, characterized in that, The elevator car (1) is fixedly installed with a main controller (2), a backup power supply (3) and a solar panel (4) on the top. The elevator car (1) is fixedly installed with a control box (13) on the inner side wall. The solar panel (4) is electrically connected to the backup power supply (3). The backup power supply (3) is electrically connected to the main controller (2) and the control box (13).

3. The automatic closing device for elevator doors at construction sites according to claim 2, characterized in that, The control box (13) is equipped with an emergency stop button and an alarm.

4. The automatic closing device for elevator doors at construction sites according to claim 1, characterized in that, A pressure sensor (51) for detecting whether the inner door (5) is closed in place is fixedly installed at the bottom of the inner door (5).

5. The automatic closing device for elevator doors at construction sites according to claim 1, characterized in that, The door control mechanism also includes an identification plate (7) and a color sensor (22). The identification plate (7) is fixedly installed at the top middle of the front side wall of the inner door, and the color sensor (22) is fixedly installed at the middle of the rear end of the guide frame (18), and the two are in corresponding positions. The color sensor (22) is wirelessly connected to the main controller (2) through a wireless transmission module.

6. The automatic closing device for elevator doors at construction sites according to claim 5, characterized in that, The color of the identification plate (7) is green, and the color sensor (22) used with it is an RGB color sensor.

7. The automatic closing device for elevator doors at construction sites according to claim 1, characterized in that, The landing door control mechanism also includes an infrared sensor (16) and an electromagnetic lock (17). Two infrared sensors (16) are fixedly installed on the front sidewalls of the two landing doors (15), and the infrared sensors (16) are wirelessly connected to the main controller (2) through a wireless transmission module. An electromagnetic lock (17) is also fixedly installed on the front sidewalls of the landing doors (15).

8. The automatic closing device for elevator doors at construction sites according to claim 1, characterized in that, The door control mechanism also includes a data processor (22) and a sensor (24). The data processor (22) is fixedly installed in the middle of the top of the inner cavity of the guide frame (18), and the sensor (24) is fixedly installed in the middle of the bottom of the inner cavity. The data processor (22) is electrically connected to the sensor (24) and the motor (19) respectively, and the data processor (22) is wirelessly connected to the main controller (2) through a wireless module.

9. The automatic closing device for elevator doors at construction sites according to claim 1, characterized in that, It also includes an auxiliary component (14), which includes a flap (141), a guide plate (142), a handrail (143), a traction shaft (144), a pull rope (145), and an electric reel (146). The flap (141) is rotatably connected to the bottom of the side wall of the elevator car (1). The guide plate (142) is fixedly installed at the front end of the flap (141), and the handrail (143) is fixedly installed on both sides of its top. The traction shaft (144) is fixedly installed inside the front two ends of the flap (141). The electric reel (146) is fixedly installed on both sides of the elevator car (1). The pull rope (145) is wound on the electric reel (146). The other end of the pull rope (145) is fixedly connected to the traction shaft (144). The electric reel (146) is electrically connected to the control box (13) and the backup power supply (3).

10. A method for using an automatic closing device for elevator doors at a construction site, characterized in that, The automatic closing device for construction site elevator doors, as described in any one of claims 1-9, is characterized by comprising the following steps: S100: When the elevator car (1) reaches the designated floor, the inner door (5) can only be opened after the floor door (15) of the corresponding floor is opened. Then, the flap (141) is lowered through the control box (13) to transport the building materials to be transported into the elevator car (1). S200: After the transport operation is completed, the two electric reels (146) on both sides are controlled to run synchronously by controlling the control box (13) inside the elevator car (1), so that the pull rope (145) is wound up, thereby driving the flip plate (141) to flip up and return to the elevator car (1); S300: Then start the motor (8) to run, drive the first pulley (9) to rotate, and under the transmission action of the belt (10), the second pulley (11) rotates synchronously and drives the worm (12) to rotate. The worm (12) drives the lifting block (6) to descend, and then drives the inner door (5) to descend and close. When the inner door (5) is closed, the pressure sensor (51) at its bottom will detect the pressure signal, which indicates that the inner door (5) is closed. At this time, the alarm on the control box (13) will not sound an alarm. On the contrary, when the inner door (5) is not closed, the alarm on the control box (13) will sound an alarm to remind the workers to pay attention. S400: After the inner door (5) is closed, the identification plate (7) on the top of the inner door (5) is exactly at the rear end of the color sensor (22). When the color sensor (22) detects the green signal, it sends data to the main controller (2) through the wireless communication module. The sensor (24) detects that the flap (141) flips up and retracts into the elevator car. The data processor (23) transmits the data to the main controller (2). The main controller (2) controls the motor (19) to run. The motor (19) drives the screw (20) to rotate, causing the two guide blocks (21) to move towards each other, thereby driving the two landing doors (15) to close in the middle. S500: During the closing process of the landing door (15), the infrared sensors (16) on both sides detect whether there is anything moving between the two landing doors (15) when the landing door (15) is closing. If the infrared sensor (15) detects an object, the main controller (2) immediately controls the motor (19) to stop rotating, so that the landing door (15) stops closing to prevent injury. When the infrared sensor (16) does not detect an object, the landing door (15) closes stably. After the landing door is closed, it is locked by the electromagnetic lock (17) to ensure that the landing door (15) will not be opened accidentally after closing.

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