Intelligent construction elevator intelligent floor safety door and control method thereof

Abstract

This invention provides an intelligent safety door for a construction hoist and its control method, relating to the field of floor door technology. The safety door includes a door frame, an A-side door, and a B-side door. A track is provided at the top of the door frame. The B-side door is rotatably connected to one side of the door frame. The A-side door and the B-side door are hinged together by elastic hinges. A second rotating wheel is installed at the top of the side of the A-side door away from the B-side door. The second rotating wheel is slidably installed in the track. This invention effectively saves space and completely eliminates the risk of blockage by construction waste through a top-driven folding structure, significantly improving its anti-fouling reliability under harsh working conditions. At the same time, the clutch component design enables manual opening in emergencies such as power outages, ensuring the safety of personnel escape. In addition, the flexible transmission of the rotating wheel groove and torsion spring solves the problems of door jamming and alignment, improving the stability of operation and service life.

Description

Technical Field

[0001] This invention relates to the field of floor door technology, and in particular to an intelligent floor safety door for an intelligent construction hoist and its control method. Background Technology

[0002] Construction hoists are essential vertical transportation equipment in high-rise building construction, primarily used to transport personnel and building materials. Floor doors serve as a critical safety barrier when the construction hoist stops at the unloading platform. Their core function is to prevent personnel or materials from accidentally falling before the hoist car reaches the designated floor. They also serve to isolate the hoistway and regulate construction access. With the increasing automation of construction and stricter safety standards, construction sites are placing more stringent requirements on the opening and closing mechanisms of floor doors, the stability of their mechanical structures, and the reliability of their safety locking systems.

[0003] However, existing construction hoist floor door technology still faces many structural and control challenges in practical applications, mainly in the following aspects:

[0004] First, in terms of mechanical structure, it is difficult to balance spatial adaptability and resistance to harsh environments.

[0005] While traditional sliding floor doors are intuitive in structure, they require extremely large lateral spaces on the unloading platform, and the doors must be fully retracted to both sides after opening, which is often difficult to achieve in narrow and congested construction sites. Furthermore, this structure typically requires a dual-drive system, increasing cost and potential points of failure.

[0006] Another widely used method is the vertical mechanical linkage door opening system. Although it is less expensive, it is a passive opening method and requires extremely high alignment accuracy between the car and the landing door. As the guide rails deform under long-term heavy loads, misalignment of the mechanical contact blocks can easily occur, leading to door jamming or even failure to unlock.

[0007] In addition, existing folding floor doors often have a lower guide rail at the bottom to solve the swaying problem. However, when transporting materials such as concrete and mortar, spilled slurry and gravel can easily clog the groove of the lower guide rail, causing the door to sway and making maintenance and cleaning extremely difficult.

[0008] More importantly, existing floor doors have significant security vulnerabilities in their safety locking systems and control logic, which has become a bottleneck restricting equipment safety.

[0009] First, electromagnetic locks present significant challenges in durability and energy consumption. Traditional electromagnetic lock systems are relatively primitive in design, typically requiring continuous power for extended periods to maintain the latch's engagement or disengagement. In the complex, high-temperature, and dusty environments of construction sites, prolonged power supply leads to severe heat buildup in the electromagnetic coils. This not only significantly increases energy consumption but also easily causes the coil insulation to age or even burn out, resulting in lock failure and increasing equipment maintenance costs and downtime risks.

[0010] Secondly, there are blind spots in the accuracy of locking / unlocking detection. Current technology generally relies on simple magnetic sensors to indicate the door's open / closed status. However, magnetic sensors can only vaguely sense whether the door is closed, and cannot accurately distinguish between two distinct states: a door closed but unlocked and a door closed and reliably locked. Due to the limited tolerance of the sensor's sensing range, the control system often experiences false lock detections—that is, the system mistakenly believes the door is locked and issues an elevator operation command, when in reality the lock hook is not fully engaged. In the event of strong winds, negative pressure at high altitudes, or external impact, the door can easily spring open unexpectedly, causing serious falls.

[0011] Third, the control logic and hardware compatibility of existing safety locking systems are insufficient. Most existing construction hoist floor door locks use active electric drive or continuous power supply control modes. This design requires high stability of the on-site power supply and a good heat dissipation environment. In harsh working conditions such as dusty construction sites and large voltage fluctuations, malfunctions due to coil overheating or mechanical aging are prone to occur. Furthermore, current door control systems generally lack a deep interlocking mechanism between the drive components and the locking device. The logic for determining "door in position" and "lock in position" is relatively simple and has low fault tolerance. When the door experiences slight displacement due to wind resistance or shaft deformation, the system is highly susceptible to logical timing errors. For example, the motor may forcibly pull the door before the latch is fully released, or a false safety signal may be triggered before the mechanical structure is truly locked. This fails to form a tight safety loop, posing a potential hazard to the long-term operation of the equipment.

[0012] In summary, existing technologies struggle to simultaneously achieve optimal space utilization, resilience to harsh environments, and high reliability in intelligent locking control. Therefore, there is an urgent need to develop an intelligent construction hoist safety door that integrates a bottom-trackless folding drive structure, high-precision status detection locks, and intelligent low-power control methods to comprehensively address these technical challenges. Summary of the Invention

[0013] The purpose of this invention is to provide an intelligent floor safety door for an intelligent construction hoist and its control method, which solves the structural problems of existing technologies such as the large space occupied by sliding doors, the high precision requirements of mechanical linkage installation, and the easy blockage of the bottom guide rail; at the same time, it solves the safety hazards caused by the continuous power supply of traditional electromagnetic locks, which are prone to overheating and damage, and the lack of intelligent interlock control logic.

[0014] To achieve the above objectives, the present invention provides the following technical solution: an intelligent floor safety door for an intelligent construction hoist, comprising a door frame and a platform door, wherein the platform door comprises an A door and a B door, a track is provided at the top of the door frame, the B door is rotatably connected to one side of the door frame, the A door and the B door are hinged to each other by elastic hinges, and a second rotating wheel is installed at the top of the side of the A door away from the B door, the second rotating wheel being slidably installed in the track;

[0015] A power drive assembly is installed at the top of the door frame to drive the A door and the B door to switch between the unfolded state and the folded state.

[0016] An intelligent safety lock assembly is installed between the door frame and the platform door. The intelligent safety lock assembly includes a lock body installed on the door frame and a lock hook installed on the platform door.

[0017] The lock body has a lock groove for inserting the lock hook, and the lock body integrates an electronically controlled locking mechanism for fastening the lock hook and a status detection module for detecting whether the lock hook is in position.

[0018] Preferably, the power drive assembly includes a rotary motor mounted on the top of the door frame, the output shaft of the rotary motor being connected to a connecting rod, and a first rotating wheel being mounted at the end of the connecting rod;

[0019] An extension plate is installed on the top of the B-side door, and a groove is provided on the extension plate for the first rotating wheel to slide.

[0020] The rotary motor drives the connecting rod to rotate, and the displacement of the first rotating wheel in the groove drives the B-side door to rotate, achieving a 180-degree folding and opening.

[0021] Preferably, the power drive assembly includes a rotary motor mounted on the top of the door frame, the output shaft of the rotary motor is connected to a connecting rod, and the end of the connecting rod is hinged to a crank rocker arm; the end of the crank rocker arm is hinged to the top of the B-side door; the rotary motor drives the connecting rod to rotate, and then pulls the B-side door to rotate through the crank rocker arm, thereby achieving a 180-degree folding opening.

[0022] Preferably, the power drive assembly includes a rotating motor, gears, and an annular transmission belt wound between the two gears, all mounted on the top of the door frame; a transmission block is provided on the transmission belt, and the transmission block is rotatably connected to the top of door A; the rotating motor drives the transmission belt to rotate, causing door A to move linearly back and forth along the track, thereby linking door B to fold and achieve opening 180 degrees.

[0023] Preferably, the power drive assembly includes an electric push rod; one end of the electric push rod is hinged to a mounting plate at the top of the door frame via a pivot, and the other end is hinged to an extension plate at the top of the B-side door via a pivot; the telescopic movement of the electric push rod pushes the B-side door to rotate, achieving a 180-degree folding opening.

[0024] Preferably, a clutch assembly is provided between the output shaft of the rotary motor and the connecting rod; the clutch assembly includes a sleeve bolted to the output shaft of the rotary motor, a polygonal block at the bottom of the sleeve, a cylinder at the bottom of the polygonal block, a limit plate fixedly connected to the bottom of the cylinder, a baffle plate sleeved on the top of the cylinder, a spring sleeved on the outside of the cylinder between the baffle plate and the limit plate, and a pull ring at the bottom of the connecting rod; under normal power-on conditions, the polygonal hole on the connecting rod engages with the polygonal block to transmit torque; under power-off or fault conditions, pulling the pull ring causes the connecting rod to overcome the spring resistance and separate from the polygonal block, allowing manual opening of doors A and B;

[0025] A magnetic block is provided on the door frame, located between door A and door B, to magnetically attract door A or door B when the door is closed.

[0026] Preferably, the electronically controlled locking mechanism includes a latch disposed within the lock body. The latch is triggered by a linkage rod and a first micro switch disposed within the lock body. When door A is closed, causing the lock hook to insert into the lock groove, the lock hook physically triggers the first micro switch to provide feedback on the closed position of the door. The end of the linkage rod is connected to the output end of an electromagnet coil disposed within the lock body.

[0027] The status detection module includes a positioning ring fixedly connected inside the lock body, a detection rod slidably connected inside the positioning ring, a locking ring in the middle of the detection rod, a return spring between the positioning ring and the locking ring, and a second micro switch at the bottom of the detection rod. The detection rod passes through the lock body. When door A is closed, causing the lock hook to insert into the lock groove, the lock hook physically pushes the detection rod to trigger the second micro switch, which is used to provide feedback on the closed position of the door.

[0028] Preferably, a second electromagnetic lock is provided at the top of the door frame, and a pull rod for emergency unlocking is provided at the top of the second electromagnetic lock. The top of the pull rod is fixedly connected to one end of the transmission rod, the other end of the transmission rod is fixedly connected to the connecting rod, and the middle part of the transmission rod is rotatably connected to the top of the door frame.

[0029] The top of the B-side door is provided with a slanted sliding groove for the sliding of the second electromagnetic lock head;

[0030] The door frame is equipped with control buttons, which include a red indicator light and a green light button.

[0031] A control method for intelligent floor safety doors of an intelligent construction hoist, used to control the aforementioned floor safety doors, includes the following steps:

[0032] S1: Power-on and self-test: When the elevator car reaches the designated floor, the control system turns on the power. At this time, the electromagnet coil of the electric locking mechanism remains de-energized. When the control system detects that the lock hook is in the lock groove and triggers the second micro switch, and the lock tongue is in the extended locking position in the mechanical reset state, and triggers the first micro switch, the control system confirms that the door is closed and locked, and the green button on the control button lights up.

[0033] S2: Unlocking and Opening: Upon receiving the green button trigger signal, the control system controls the electric locking mechanism to operate, energizing the electromagnet coil to retract the bolt, unlocking the lock hook, changing the state of the first micro switch, and in response to the change in the state of the first micro switch, the green indicator light goes out, and the power supply circuit of the electromagnet coil is disconnected; after the control system confirms that the bolt has been unlocked, it starts the power drive component to drive the door to fold open. During this process, the lock hook disengages from the lock groove, the state of the second micro switch changes, and the control button switches to the red light constant state;

[0034] S3: Door closing and reset: After personnel have entered and exited, the control system drives the power drive component to run in reverse, driving the door leaf to move in the closing direction until the lock hook is inserted into the lock groove and pushes the detection rod. At the same time, the lock tongue automatically resets under the action of mechanical elastic force and is locked into the lock hook, so that both the first micro switch and the second micro switch are retried.

[0035] S4: Locking and Power Off: After the control system detects the trigger signals of the first micro switch and the second micro switch at the same time, it determines that the door is closed and locked, and the green light of the control green button is lit up again; at this time, the control system outputs a safety signal that allows the car to run, and then cuts off the power supply to the intelligent safety lock component and the power drive component, so that the system returns to the state of no-electric mechanical locking.

[0036] As a further improvement to the above technical solution:

[0037] Step S1 includes a power-on logic to prevent malfunctions: before the elevator car reaches the designated floor, the intelligent safety lock component is in a de-energized state, and the electric locking mechanism relies on the mechanical structure to keep the lock hook locked, preventing the coil from overheating or the motor from being damaged due to prolonged power supply; the power circuit is only connected after the car arrives and triggers the leveling signal. If the first micro switch or the second micro switch is not in the triggered state at this time, the control system determines that there is an abnormality and prohibits the green button from lighting up the green light and the door opening action.

[0038] The steps S2 and S4 are equipped with dual interlocking logic: In step S2, the state change signal of the first micro switch is used as a prerequisite for de-energizing the electromagnet coil and starting the power drive component, preventing the coil from being energized for a long time and forcibly pulling the door in the locked state; In step S4, the control system determines that the lock is valid only after the first micro switch and the second micro switch simultaneously provide trigger signals, preventing the output of safety signals when the door is not closed tightly or the lock tongue is not reset.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] 1. By adopting a structure in which a rotary motor is installed at the top of the door frame to drive the folding door in conjunction with a linkage assembly, and by placing all the guide rails at the top, all moving parts and drive mechanisms can be completely moved off the ground. The folding and storage method replaces the translation method that requires a lot of lateral space. This effectively avoids the blockage of the bottom guide rail by concrete, mortar and gravel spilled on the construction site. It solves the problems of existing technologies where sliding doors occupy a large space on a narrow unloading platform and the operational failure of the bottom guide rail due to the accumulation of construction waste. It improves the equipment's anti-fouling reliability and site adaptability in harsh construction environments.

[0041] Second, by setting a clutch assembly consisting of polygonal blocks, springs, and pull rings between the rotating motor and the transmission linkage, the power can be tightly transmitted by polygonal engagement when the power is on normally. In case of emergency such as power outage, fire, or motor failure, personnel can pull the pull ring to overcome the spring resistance and force the linkage to disengage from the motor's power end, thus enabling manual opening of the floor door. This solves the technical problem of traditional electric doors locking up after a power outage due to motor seizure, preventing personnel from escaping, and improves the safety and emergency rescue efficiency of the construction hoist system in the event of a sudden accident.

[0042] Third, by setting an extension plate with a groove at the top of the B-side door and cooperating with the first rotating wheel at the end of the connecting rod, and combining it with the torsion spring elastic hinge at the connection point, the rotational motion of the connecting rod can be converted into a force to push the door panel to fold. The rolling displacement of the first rotating wheel in the groove adapts to the change of folding angle, and the torsion spring helps to eliminate motion dead points, which can prevent the door from jamming or wearing during the folding process. This solves the problem that the traditional mechanical linkage door opening requires extremely high alignment accuracy and is prone to opening and closing failure due to shaft deformation, thus improving the smoothness of door operation and the service life of the drive mechanism.

[0043] IV. This invention proposes a low-power, high-safety passive control method. By employing a mechanical automatic reset locking and instantaneous unlocking logic, the electromagnetic coil is energized only for the moment the door opens, completely solving the problem of traditional electromagnetic locks overheating and burning out due to prolonged energization. Combined with the control strategy of the electric door closing mechanism, mechanical thrust is used to ensure that the lock hook is in place and locks naturally, eliminating the jamming fault caused by misalignment of active electric locks. Furthermore, the strict dual micro-switch interlocking mechanism in the control logic ensures that the elevator can only operate under the dual conditions of the door being physically closed and the lock tongue being mechanically reset, greatly improving safety. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0045] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0046] Figure 3 This is a schematic diagram of the clutch assembly structure of the present invention;

[0047] Figure 4 This is a schematic diagram of the unfolding structure of the floor door of the present invention;

[0048] Figure 5 This is a schematic diagram of the track and the second rotating wheel structure of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0050] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B;

[0051] Figure 8 This is a schematic diagram of the structure of the third embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram of the transmission belt structure according to the third embodiment of the present invention;

[0053] Figure 10 This is a schematic diagram of the fourth embodiment of the present invention;

[0054] Figure 11 This is a schematic diagram of the lock body structure of the present invention;

[0055] Figure 12 This is a schematic diagram of the structure of the fifth embodiment of the present invention;

[0056] Figure 13 This is a schematic diagram of the sixth embodiment of the present invention.

[0057] The diagram labels are as follows: 1. Door frame; 2. Door A; 3. Door B; 4. Track; 5. Flexible hinge; 6. Second wheel; 7. Lock body; 8. Lock hook; 9. Lock groove; 12. Rotary motor; 13. Connecting rod; 14. First rotating wheel; 15. Extension plate; 16. Groove; 17. Crank rocker arm; 19. Rotating motor; 20. Gear; 21. Transmission belt; 22. Transmission block; 23. Electric push rod; 24. Mounting plate; 25. Sleeve; 26. Polygonal block; 261. Cylinder; 262. Limiting plate; 263. Baffle plate; 264. Spring; 27. Pull ring; 28. Magnetic block; 29. ​​Second electromagnetic lock; 291. Pull rod; 292. Transmission rod; 293. Inclined slide groove; 30. Door spring; 31. Control button; 101. Lock tongue; 102. Linkage rod; 103. First micro switch; 104. Detection rod; 105. Locking ring; 106. Return spring; 107. Second micro switch. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0059] Please see Figure 1-5 As shown in Figure 11, the present invention provides a technical solution: an intelligent construction hoist intelligent floor safety door, including a door frame 1, an A door 2 and a B door 3, a track 4 is provided on the top of the door frame 1, the B door 3 is rotatably connected to one side of the door frame 1, the A door 2 and the B door 3 are hinged to each other by an elastic hinge 5, a second rotating wheel 6 is installed on the top of the side of the A door 2 away from the B door 3, and the second rotating wheel 6 is slidably installed in the track 4;

[0060] A power drive assembly is installed on the top of the door frame 1 to drive door A 2 and door B 3 to switch between the unfolded and folded states.

[0061] A smart safety lock assembly is installed between the door frame 1 and door A 2. The smart safety lock assembly includes a lock body 7 installed on a post on one side of the door frame 1 and a lock hook 8 installed on the side of door A 2.

[0062] The lock body 7 has a lock groove 9 for the lock hook 8 to be inserted. The lock body 7 integrates an electronically controlled locking mechanism for fastening the lock hook 8 and a status detection module for detecting whether the lock hook 8 is in position.

[0063] Door A (2) and Door B (3) form the main enclosed barrier. A key feature is the folding design, with one side opening 180 degrees, saving corridor space and facilitating material access to and from the elevator. Compared to a single-leaf swing door, the folding design significantly reduces the space occupied in the corridor or shaft when open, making it ideal for narrow construction sites. Driving one door simultaneously activates the other, resulting in rapid opening and improved efficiency for personnel and material movement. By placing the track 4 at the top, the problem of concrete, mortar, and gravel clogging the bottom guide rails is avoided, improving the equipment's reliability under harsh conditions. The intelligent safety lock assembly, through the rigid mechanical engagement of the hook 8 and the lock groove 9, solves the safety hazards of traditional magnetic locks, such as incomplete closure and susceptibility to being blown open by strong winds.

[0064] Furthermore, the power drive assembly includes a rotary motor 12 mounted on the top of the door frame 1, the output shaft of the rotary motor 12 is connected to a connecting rod 13, and a first rotating wheel 14 is mounted at the end of the connecting rod 13;

[0065] An extension plate 15 is installed on the top of door B 3, and a groove 16 is provided on the extension plate 15 for the first rotating wheel 14 to slide.

[0066] The rotary motor 12 drives the connecting rod 13 to rotate, and the displacement of the first rotating wheel 14 in the groove 16 drives the B-side door 3 to rotate, realizing the folding and opening of 180 degrees.

[0067] This embodiment employs a crank-operated 180-degree folding door opening method. The rotary motor 12 serves as the power source, converting rotational motion into translational motion via the connecting rod 13. The extension plate 15 increases the lever arm length, allowing the motor to drive the heavy door leaf with less torque, thus acting as a force-saving lever. The engagement between the groove 16 and the first rotating wheel 14 allows for automatic displacement adjustment during folding, effectively eliminating dead points caused by angle changes during folding door movement, preventing mechanism jamming, and ensuring smooth and noiseless opening and closing.

[0068] Furthermore, a clutch assembly is provided between the output shaft of the rotary motor 12 and the connecting rod 13; the clutch assembly includes a sleeve 25 bolted to the output shaft of the rotary motor 12, a polygonal block 26 at the bottom of the sleeve 25, a cylinder 261 at the bottom of the polygonal block 26, a limiting piece 262 fixedly connected to the bottom of the cylinder 261, a baffle 263 sleeved on the top of the cylinder 261, a spring 264 sleeved on the cylinder 261 between the baffle 263 and the limiting piece 262, and a pull ring 27 at the bottom of the connecting rod 13; under normal power-on conditions, the connecting rod 13 engages with the polygonal block 26 to transmit torque; under power-off or fault conditions, by pulling the pull ring 27, the connecting rod 13 overcomes the resistance of the spring 264 and separates from the polygonal block 26, allowing manual pushing of door A 2 and door B 3 to open;

[0069] A magnetic block 28 is provided on the door frame 1 and located between door A 2 and door B 3. It is used to magnetically attract door A 2 or door B 3 when the door is closed to prevent the door from shaking.

[0070] The clutch assembly is a key emergency safety design feature, enabling emergency door opening by maintenance personnel during power outages or malfunctions. In emergencies such as power outages, fires, or motor damage, personnel can simply pull the pull ring 27 to disconnect the rigid connection between the motor and the door, allowing manual door opening for escape. This solves the fatal flaw of traditional electric doors where the motor seizes up after a power outage, preventing them from opening. The magnetic block 28 provides auxiliary suction when the door is closed, preventing the door from wobbling and impacting within the small gap caused by strong winds at high altitudes, protecting the mechanical structure and reducing noise.

[0071] Furthermore, the electronic locking mechanism includes a latch 101 disposed within the lock body 7. The latch 101 is triggered by a linkage rod 102 and a first micro switch 103 disposed within the lock body 7. When door A 2 is closed, causing the lock hook 8 to insert into the lock groove 9, the lock hook 8 physically triggers the first micro switch 103 to provide feedback on the closed position of the door. The end of the linkage rod 102 is connected to the output end of an electromagnet coil disposed within the lock body 7.

[0072] The status detection module includes a positioning ring fixedly connected inside the lock body 7, a detection rod 104 slidably connected inside the positioning ring, a locking ring 105 set in the middle of the detection rod 104, a return spring 106 set between the positioning ring and the locking ring 105, and a second micro switch 107 set at the bottom of the detection rod 104. The detection rod 104 passes through the lock body 7. When the A door 2 is closed, causing the lock hook 8 to be inserted into the lock groove 9, the lock hook 8 physically pushes the detection rod 104 to trigger the second micro switch 107, which is used to provide feedback on the closed position of the door.

[0073] The first microswitch 103 specifically detects whether the bolt 101 is locked, and the second microswitch 107 specifically detects whether the door is fully closed. This dual independent detection mechanism constitutes a rigorous interlocking logic foundation. The system only determines safety when the latch 8 is fully inserted (door in position) and the bolt 101 is fully extended (locked position), completely eliminating safety accidents caused by single sensor failure or false locking. The design of the linkage rod 102 directly links the triggering of the microswitches with the mechanical action, making the feedback more realistic and reliable.

[0074] This embodiment also provides a control method for an intelligent construction hoist's intelligent floor safety door, used to control the aforementioned floor safety door, including the following steps: S1: Power-on and self-test: When the hoist car arrives at the designated floor, the control system connects to the power supply, at which time the electromagnet coil of the electric locking mechanism remains de-energized; when the lock hook 8 is detected to be located in the lock groove 9 and the second micro switch 107 is in the triggered state, and the lock tongue 101 is in the extended locking position in the mechanical reset state, and the first micro switch 103 is in the triggered state, the control system confirms that the door is closed and locked, and controls the green button on the control button 31 to light up the green light;

[0075] S2: Unlocking and Opening: Upon receiving the green button trigger signal, the control system controls the electric locking mechanism to operate, energizing the electromagnet coil to engage and move the linkage rod 102, thereby releasing the latch 101 that is engaged with the linkage rod 102. The latch 101 retracts, the lock hook 8 is unlocked, and the state of the first micro switch 103 changes. In response to the change in the state of the first micro switch 103, the green indicator light goes out, and the power supply circuit of the electromagnet coil is disconnected. After the control system confirms that the latch 101 has been unlocked, it starts the power drive component to drive the door to fold open. During this process, the lock hook 8 disengages from the lock groove 9, the state of the second micro switch 107 changes, and the control button 31 switches to the red light constant state.

[0076] S3: Door closing and reset: After personnel have entered and exited, the control system drives the power drive component to run in reverse, driving the door leaf to move in the closing direction until the lock hook 8 is inserted into the lock groove 9 and pushes the detection rod 104. At the same time, the lock tongue 101 automatically resets under the action of mechanical elastic force and is locked into the lock hook 8, so that the first micro switch 103 and the second micro switch 107 are both re-triggered.

[0077] S4: Locking and Power Off: After the control system detects the trigger signals of the first micro switch 103 and the second micro switch 107 at the same time, it determines that the door is closed and locked, and controls the green button to light up the green light again; at this time, the control system outputs a safety signal that allows the car to run, and then cuts off the power supply to the intelligent safety lock component and the power drive component, so that the system returns to the state of no-electric mechanical locking.

[0078] In addition, the control system has an intelligent anti-pinch function: the control system can detect the motor stall current, and if the motor current is too high, it will stop or send a reverse signal to reverse the motor. For example, if there is a foreign object stuck in front of the door or a person blocking it when closing or opening the door, it will not pinch a person, and will not mechanically continue to move, causing damage to the door or burnout of the motor.

[0079] Step S1 includes a power-on logic to prevent malfunctions: Before the elevator car reaches the designated floor, the intelligent safety lock component is in a de-energized state, and the electric locking mechanism relies on the mechanical structure to keep the lock hook 8 locked, preventing the coil from overheating or the motor from being damaged due to prolonged power supply; the power circuit is only connected after the car arrives and triggers the leveling signal. If the first micro switch 103 or the second micro switch 107 is not in the triggered state at this time, the control system determines that there is an abnormality and prohibits the green button from lighting up the green light and the door opening action.

[0080] Steps S2 and S4 are equipped with dual interlocking logic: In step S2, the state change signal of the first micro switch 103 is used as a prerequisite for de-energizing the electromagnet coil and starting the power drive component, preventing the coil from being energized for a long time and forcibly pulling the door in the locked state; In step S4, the control system determines that the lock is valid only after the first micro switch 103 and the second micro switch 107 simultaneously provide trigger signals, preventing the output of safety signals when the door is not closed tightly or the latch 101 is not reset. Example 2

[0081] Please see Figure 6 and 7 As shown in the first embodiment, as another implementation of the present invention, the power drive assembly includes a rotary motor 12 mounted on the top of the door frame 1. The output shaft of the rotary motor 12 is connected to a connecting rod 13, and the end of the connecting rod 13 is hinged to a crank rocker arm 17. The end of the crank rocker arm 17 is hinged to the top of the B-side door 3. The rotary motor 12 drives the connecting rod 13 to rotate, and then pulls the B-side door 3 to rotate through the crank rocker arm 17, thereby achieving a 180-degree folding opening.

[0082] This embodiment employs a crank and connecting rod structure for 180-degree folding and opening. The linkage mechanism consisting of the crank rocker arm 17 and the connecting rod 13 has a large transmission ratio and stroke, enabling easier large-angle folding and opening of the B-side door 3. Compared to the sliding track structure, the fully articulated linkage structure has stronger wear resistance in harsh, dusty environments, a more predictable running trajectory, and a higher tolerance for adjustment of the connecting rod length during installation and debugging.

[0083] Furthermore, a clutch assembly is provided between the output shaft of the rotary motor 12 and the connecting rod 13; the clutch assembly includes a sleeve 25 bolted to the output shaft of the rotary motor 12, a polygonal block 26 at the bottom of the sleeve 25, a cylinder 261 at the bottom of the polygonal block 26, a limiting piece 262 fixedly connected to the bottom of the cylinder 261, a baffle 263 sleeved on the top of the cylinder 261, and a spring 264 sleeved on the cylinder 261 between the baffle 263 and the limiting piece 262. A pull ring 27 is provided at the bottom of the connecting rod 13; under normal power-on state, the connecting rod 13 engages with the polygonal block 26 to transmit torque; under power-off or fault state, by pulling the pull ring 27, the connecting rod 13 overcomes the resistance of the spring 264 and separates from the polygonal block 26, allowing manual pushing of door A 2 and door B 3 to open; a magnetic block 28 is provided on the door frame 1 and located between door A 2 and door B 3, which is used to magnetically attract door A 2 or door B 3 when the door is closed to prevent the door from shaking.

[0084] The clutch assembly and magnetic block 28 here are designed the same as in Embodiment 1, ensuring that even with a crank rocker arm 17 driven structure, the system still has the functions of emergency start-up in case of power failure and windproof and anti-shaking, thus ensuring a unified safety standard. Example 3

[0085] Please see Figure 8 and 9 As shown in the first embodiment, as another implementation of the present invention, the power drive assembly includes a rotating motor 19, gears 20, and an annular transmission belt 21 wound between the two gears 20, all mounted on the top of the door frame 1. A transmission block 22 is provided on the transmission belt 21, and the transmission block 22 is rotatably connected to the top of the A door 2. The rotating motor 19 drives the transmission belt 21 to rotate, causing the A door 2 to move linearly back and forth along the track 4, thereby linking the B door 3 to fold and achieve opening 180 degrees.

[0086] This embodiment employs a drive mechanism combined with a synchronous pulley and belt to fold and open the door 180 degrees. The synchronous belt drive system offers advantages such as smooth operation, low noise, and no need for lubrication. The transmission block 22 directly drags door A 2 in a linear motion, naturally folding door B 3 using the door's hinge mechanism. This results in more even force distribution and avoids localized stress concentration. This pull-end drive method is particularly suitable for construction environments requiring noise control or extremely high operational stability. Example 4

[0087] Please see Figure 10As shown in the first embodiment, as another implementation of the present invention, the power drive assembly includes an electric push rod 23; one end of the electric push rod 23 is hinged to the mounting plate 24 on the top of the door frame 1 via a pivot, and the other end is hinged to the extension plate 15 on the top of the B door 3 via a pivot; the telescopic movement of the electric push rod 23 pushes the B door 3 to rotate, thereby achieving a 180-degree folding opening.

[0088] This embodiment uses an electric push rod to fold and open the door 180 degrees. The electric push rod 23 has a highly integrated structure, is easy to install, and has a built-in travel limit function. It directly pushes the door leaf through linear telescopic movement, with a large pushing force, and the push rod itself has good self-locking performance, making it very suitable for occasions with large wind loads and requiring strong door leaf position maintenance, greatly simplifying the mechanical transmission chain. Example 5

[0089] Please see Figure 12 As shown in the first embodiment, as another implementation of the present invention, an intelligent safety lock assembly is installed between the door frame 1 and the B door 3. The intelligent safety lock assembly includes a lock body 7 installed under the top crossbar of the door frame 1 and a lock hook 8 installed on the top of the B door 3.

[0090] A door ejector 30 for ejecting door B 3 is installed on the top horizontal bar of door frame 1. Example 6

[0091] Please see Figure 13 As shown in the comparison with Embodiment 1, as another embodiment of the present invention, a second electromagnetic lock 29 is provided on the top of the door frame 1, and a pull rod 291 for emergency unlocking is provided on the top of the second electromagnetic lock 29. The top of the pull rod 291 is fixedly connected to one end of the transmission rod 292, the other end of the transmission rod 292 is fixedly connected to the connecting rod 13, and the middle part of the transmission rod 292 is rotatably connected to the top of the door frame 1.

[0092] The top of door B 3 is provided with a slanted slide groove 293 for sliding the lock head of the second electromagnetic lock 29.

[0093] When the pull ring 27 pulls down the connecting rod 13 to open the door in an emergency, it causes one side of the transmission rod 292 to press down and the other side of the transmission rod 292 to rise, which in turn causes the pull rod 291 at the top of the second electromagnetic lock 29 to be lifted, thereby unlocking the second electromagnetic lock 29 and enabling emergency manual door opening.

[0094] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart floor safety door for an intelligent construction hoist, comprising a door frame (1) and a platform door, wherein the platform door comprises an A-leaf door (2) and a B-leaf door (3), characterized in that: The top of the door frame (1) is provided with a track (4), the B door (3) is rotatably connected to one side of the door frame (1), the A door (2) and the B door (3) are hinged to each other by an elastic hinge (5), and a second wheel (6) is installed on the top of the side of the A door (2) away from the B door (3), and the second wheel (6) is slidably installed in the track (4); The top of the door frame (1) is equipped with a power drive assembly for driving the A door (2) and the B door (3) to switch between the unfolded state and the folded state. The power drive assembly includes a rotary motor (12) mounted on the top of the door frame (1), and the output shaft of the rotary motor (12) is connected to a connecting rod (13). A smart safety lock assembly is installed between the door frame (1) and the platform door. The smart safety lock assembly includes a lock body (7) installed on the door frame (1) and a lock hook (8) set on the platform door. The lock body (7) has a lock groove (9) for inserting the lock hook (8). The lock body (7) integrates an electronically controlled locking mechanism for fastening the lock hook (8) and a status detection module for detecting whether the lock hook (8) is in place. A clutch assembly is provided between the output shaft of the rotary motor (12) and the connecting rod (13); the clutch assembly includes a sleeve (25) bolted to the output shaft of the rotary motor (12), a polygonal block (26) is provided at the bottom of the sleeve (25), a cylinder (261) is provided at the bottom of the polygonal block (26), a limit plate (262) is fixedly connected to the bottom of the cylinder (261), and a baffle (263) is sleeved on the top of the cylinder (261). 3) A spring (264) is provided between the limiting piece (262) and the cylinder (261), and a pull ring (27) is provided at the bottom of the connecting rod (13); under normal power-on state, the polygonal hole on the connecting rod (13) meshes with the polygonal block (26) to transmit torque; under power-off or fault state, by pulling the pull ring (27), the connecting rod (13) overcomes the resistance of the spring (264) and separates from the polygonal block (26), allowing manual push to open the A door (2) and the B door (3); A magnetic block (28) is provided on the door frame (1) and located between door A (2) and door B (3) to magnetically attract door A (2) or door B (3) when the door is closed. The top of the door frame (1) is provided with a second electromagnetic lock (29), and the top of the second electromagnetic lock (29) is provided with a pull rod (291) for emergency unlocking. The top of the pull rod (291) is fixedly connected to one end of the transmission rod (292), the other end of the transmission rod (292) is fixedly connected to the connecting rod (13), and the middle part of the transmission rod (292) is rotatably connected to the top of the door frame (1). The top of the B-side door (3) is provided with a slanted groove (293) for sliding the lock head of the second electromagnetic lock (29). The door frame (1) is equipped with a control button (31), which includes a red indicator light and a green light button.

2. The intelligent floor safety door for an intelligent construction hoist according to claim 1, characterized in that: The first rotating wheel (14) is installed at the end of the connecting rod (13). An extension plate (15) is installed on the top of the B-side door (3), and a groove (16) is provided on the extension plate (15) for the first rotating wheel (14) to slide. The rotary motor (12) drives the connecting rod (13) to rotate, and the displacement of the first rotating wheel (14) in the groove (16) drives the B-side door (3) to rotate, thereby achieving a 180-degree folding opening.

3. The intelligent floor safety door for an intelligent construction hoist according to claim 1, characterized in that: The end of the connecting rod (13) is hinged to a crank rocker arm (17); the end of the crank rocker arm (17) is hinged to the top of the B-side door (3); the rotary motor (12) drives the connecting rod (13) to rotate, and then pulls the B-side door (3) to rotate through the crank rocker arm (17), so as to achieve folding and opening by 180 degrees.

4. The intelligent floor safety door for an intelligent construction hoist according to claim 1, characterized in that: The electronic locking mechanism includes a latch (101) disposed in the lock body (7). The latch (101) is triggered by a linkage rod (102) and a first micro switch (103) disposed in the lock body (7). When the A door (2) is closed, causing the lock hook (8) to be inserted into the lock groove (9), the lock hook (8) physically triggers the first micro switch (103) to provide feedback on the closed position of the door. The end of the linkage rod (102) is connected to the output end of the electromagnet coil disposed in the lock body (7). The status detection module includes a positioning ring fixedly connected inside the lock body (7), a detection rod (104) slidably connected inside the positioning ring, a locking ring (105) provided in the middle of the detection rod (104), a reset spring (106) provided between the positioning ring and the locking ring (105), a second micro switch (107) provided at the bottom of the detection rod (104), and the detection rod (104) penetrating the lock body (7); when the A door (2) is closed, causing the lock hook (8) to be inserted into the lock groove (9), the lock hook (8) physically pushes the detection rod (104) to trigger the second micro switch (107) to provide feedback on the closed position of the door.

5. A control method for an intelligent construction hoist's intelligent floor safety door, used to control the floor safety door as described in claim 4, characterized in that, Includes the following steps: S1: Power-on and self-test: When the elevator car reaches the designated floor, the control system turns on the power. At this time, the electromagnet coil of the electric locking mechanism remains de-energized. When the lock hook (8) is detected to be in the lock groove (9) and the second micro switch (107) is in the triggered state, and the lock tongue (101) is in the extended locking position in the mechanical reset state, and the first micro switch (103) is in the triggered state, the control system confirms that the door is closed and locked, and the green button on the control button (31) lights up. S2: Unlocking and opening: After receiving the green button trigger signal, the control system controls the electric locking mechanism to move, so that the electromagnet coil is energized and attracted to drive the bolt (101) to retract, the lock hook (8) is unlocked, the state of the first micro switch (103) changes, in response to the change of the state of the first micro switch (103), the green indicator light goes out, and at the same time the power supply circuit of the electromagnet coil is disconnected; after the control system confirms that the bolt (101) has been unlocked, it starts the power drive component to drive the door to fold open. During this process, the lock hook (8) disengages from the lock groove (9), the state of the second micro switch (107) changes, and the control button (31) switches to the red light constant state; S3: Door closing and reset: After personnel have entered and exited, the control system drives the power drive component to run in reverse, driving the door leaf to move in the closing direction until the lock hook (8) is inserted into the lock groove (9) and pushes the detection rod (104). At the same time, the lock tongue (101) automatically resets under the action of mechanical elastic force and is locked into the lock hook (8), so that the first micro switch (103) and the second micro switch (107) are both re-triggered. S4: Locking and Power Off: After the control system detects the trigger signals of the first micro switch (103) and the second micro switch (107) at the same time, it determines that the door is closed and locked, and controls the green button to light up the green light again; at this time, the control system outputs a safety signal that allows the car to run, and then cuts off the power supply to the intelligent safety lock component and the power drive component, so that the system returns to the state of no-electric mechanical locking.

6. The control method according to claim 5, characterized in that: The step S1 includes a power-on logic to prevent malfunctions: before the elevator car reaches the designated floor, the intelligent safety lock component is in a de-energized state, and the electric locking mechanism relies on the mechanical structure to keep the lock hook (8) locked, preventing the coil from overheating or the motor from being damaged due to prolonged power supply; the power circuit is only connected when the car arrives and triggers the leveling signal. If the first micro switch (103) or the second micro switch (107) is not in the triggered state at this time, the control system determines that there is an abnormality and prohibits the green button from lighting up the green light and the door opening action. The steps S2 and S4 are equipped with dual interlocking logic: In step S2, the state change signal of the first micro switch (103) is used as a prerequisite for de-energizing the electromagnet coil and starting the power drive component, preventing the coil from being energized for a long time and forcibly pulling the door in the locked state; In step S4, the control system determines that the lock is valid only after the first micro switch (103) and the second micro switch (107) simultaneously provide trigger signals, preventing the output of safety signals when the door is not closed tightly or the latch (101) is not reset.

Images