Improved landing door lock for construction elevator

Abstract

An improved landing door lock for a construction elevator comprises a left fixing plate and a right fixing plate and is characterized in that a lock groove is formed in the front face of the left fixing plate, a bolt capable of swinging and an electromagnetic valve lock with a telescopic spring bolt are arranged on the front face of the right fixing plate, the bolt is provided with a swinging end and a connecting end, the swinging end can be placed in the lock groove, and the connecting end can be placed in the lock groove. The connecting end is rotationally connected with the right fixing plate and is close to the telescopic spring bolt, the telescopic spring bolt acts to enable the bolt placed in the lock groove to be in a locked state or an unlocked state, the bolt cannot be separated from the lock groove in the locked state, and the bolt can swing to be separated from the lock groove in the unlocked state. The landing door lock for the construction elevator has the advantages that the landing door lock for the construction elevator of another structure is provided, the production process of the left fixing plate is simplified, the left fixing plate can be conveniently produced in a miniaturized mode, and the production and packaging cost of the left fixing plate is lower.

Description

Technical Field

[0001] This utility model relates to a door lock device, and more particularly to an improved landing door lock for construction elevators. Background Technology

[0002] In current construction projects, construction elevators are widely used to transport workers and materials. To ensure construction safety, safety doors are installed at the edges of each floor where the elevator contacts the floor. To ensure worker safety, these safety doors must be locked using landing door locks. However, most existing construction elevator door lock systems are directly controlled by the workers. If workers forget to lock the doors or neglect this task, the safety doors may not close properly, or the elevator car may open prematurely before reaching its destination. This can lead to frequent falls from the stairwells on construction sites, impacting construction safety.

[0003] In response to the above situation, the existing construction elevator landing door lock, as shown in Chinese Utility Model Patent Application No. CN202220090448.7 (Authorization Announcement No. CN217264150U), includes a left fixed plate and a right fixed plate. The left fixed plate is provided with a swingable bolt, and the right fixed plate is provided with a lock groove and a solenoid valve lock. After the bolt swings, it can be placed in the lock groove. The telescopic locking tongue action of the solenoid valve lock can put the bolt in the lock groove into a locked state or an unlocked state. This lock can be easily assembled on existing landing doors, enabling unattended construction elevators while ensuring the personal safety of workers.

[0004] While the aforementioned construction elevator landing door lock can eliminate some safety hazards, its bolt and electromagnet are mounted on the left and right fixed plates respectively, meaning the lock components are distributed across these plates. This makes the manufacturing process for the left and right fixed plates more complex, increasing the production cost of the lock and hindering miniaturization. Therefore, further improvements to the construction elevator landing door lock are needed. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a structurally improved landing door lock for construction elevators, which addresses the current state of the prior art.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: The improved construction elevator landing door lock includes a left fixed plate and a right fixed plate. The left fixed plate is provided with a lock groove on its front side, and the right fixed plate is provided with a swingable bolt and an electromagnetic valve lock with a telescopic latch on its front side. The bolt has a swing end and a connecting end. The swing end can be placed in the lock groove, and the connecting end is rotatably connected to the right fixed plate and close to the telescopic latch. The telescopic latch can make the bolt placed in the lock groove be in a locked state or an unlocked state. In the locked state, the bolt cannot be disengaged from the lock groove, and in the unlocked state, the bolt can swing out of the lock groove.

[0007] A further improvement is that the connecting end of the bolt is provided with a stop, which can be a socket, a slot, or a block protruding from the connecting end. The telescopic bolt of the solenoid valve lock can block the stop to lock the bolt. Alternatively, the telescopic bolt of the solenoid valve lock can push an intermediate rod to block the stop to lock the bolt. The stop can cooperate with the telescopic bolt of the solenoid valve lock. The stop can be an additional block that extends to cooperate with the telescopic bolt or intermediate rod of the solenoid valve lock. Of course, the stop can also be a socket or slot into which the telescopic bolt or intermediate rod can be inserted. A suitable structure can be selected according to layout requirements. The intermediate rod prevents the telescopic bolt of the solenoid valve lock from directly acting on the stop, thus protecting the solenoid valve lock.

[0008] In a further improvement, the telescopic bolt of the solenoid valve lock can retract inward to release the stop, thus unlocking the bolt. The telescopic bolt can directly act on the stop to prevent the stop from swinging with the bolt, thereby locking the bolt.

[0009] In a further improvement, the bolt also includes a pivot, a first handle, and a second handle. One end of the pivot is connected to a connecting end, and the other end passes through the right fixed plate and is connected to the first handle on the back of the right fixed plate. The swing end is provided with a second handle. The first handle facilitates the operator's control of the bolt's swing within the construction floor, while the second handle facilitates the operator's control of the bolt's swing within the construction elevator.

[0010] A further improvement involves fixing an L-shaped plate to the front of the left fixing plate, forming the lock groove. The lock groove has a U-shaped longitudinal section with its opening facing upwards. A notch is provided on the vertical plate of the plate. With the bolt resting in the lock groove, the second handle rests in the notch, with a portion of the second handle protruding from the notch. The U-shaped lock groove with its upward opening facilitates the bolt being placed in the lock groove from above, and the notch facilitates the operator's movement of the second handle.

[0011] A further improvement is that the lock slot is also equipped with a sensor switch, which can be a micro switch or a magnetic induction switch. This sensor switch is used to detect whether the door bolt is positioned in the lock slot and output a signal. The micro switch or magnetic induction switch can detect whether the door bolt is positioned in the lock slot and output a signal. This signal can be sent to the control system, which then signals the solenoid valve to lock the door. The solenoid valve locks the door bolt, and the control system can also provide a signal that the elevator can leave the floor at that location.

[0012] Further improvements include a position sensor, which senses the position of the construction elevator and outputs a signal. The position sensor can be an infrared sensor, a Hall effect sensor, etc. Only after the position sensor detects that the construction elevator has reached its designated position will the solenoid valve lock issue an opening signal, releasing the door bolt and allowing the landing door using this bolt to be opened. The position sensor can be installed on the left or right fixed plate, the solenoid valve lock, or independently on both the left and right fixed plates in other locations, or it can be installed on the landing door.

[0013] In a further improvement, the back sides of the left and right fixing plates are formed with recesses, and the front side of the right fixing plate is also provided with a protective cover for shielding the solenoid valve lock. The recesses can easily accommodate the connecting bolts, creating clearance.

[0014] Compared with the prior art, the advantages of this utility model are as follows: This application provides a different structure for the landing door lock of a construction elevator. The bolt and solenoid valve lock of this construction elevator landing door lock are both set on the right fixed plate, and the left fixed plate is provided with a lock groove. This concentrates the bolt and solenoid valve lock on the right fixed plate, improves the utilization rate of the right fixed plate, simplifies the production process of the left fixed plate, facilitates the miniaturization of the left fixed plate, and reduces the production and packaging costs of the left fixed plate. Furthermore, the structure of this construction elevator landing door lock is reasonable. The solenoid valve lock controls whether the swinging bolt is locked in the lock groove to realize the locking or unlocking of the landing door lock, thereby realizing the unattended intelligent operation of the construction elevator and ensuring the personal safety of the operators. Attached Figure Description

[0015] Figure 1 This is a frontal perspective view of an embodiment of the present utility model (locked state);

[0016] Figure 2 This is a three-dimensional structural diagram of the rear side of an embodiment of the present utility model (locked state);

[0017] Figure 3 This is a front perspective view of an embodiment of the present utility model (with the protective cover removed and in the locked state);

[0018] Figure 4 This is a cross-sectional view (locked state) of the door bolt and solenoid valve lock in the embodiment of this utility model;

[0019] Figure 5 This is a front perspective structural diagram of an embodiment of the present utility model (with the protective cover removed, in the unlocked state);

[0020] Figure 6 This is a front perspective structural diagram of an embodiment of the present utility model (with the protective cover removed and the device unlocked). Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-6 The image shown is the preferred embodiment of this utility model.

[0023] The construction elevator landing door lock of this embodiment includes a left fixing plate 1 and a right fixing plate 2. The back of the left fixing plate 1 and the right fixing plate 2 are formed with concave portions, which can conveniently accommodate each connecting bolt and form a clearance. The left fixed plate 1 has a lock groove 3 on its front side. The lock groove 3 is composed of an L-shaped plate fixed to the left fixed plate 1. The longitudinal section of the lock groove 3 is U-shaped and its opening faces upward. The vertical plate of the plate has a notch 31. The lock groove 3 allows the bolt 4 to be placed in the lock groove 3 from above. The right fixed plate 2 has a swingable bolt 4, a solenoid valve lock 5 with a telescopic latch 51, and a protective cover 6 for covering the solenoid valve lock 5 on its front side. The bolt 4 has a swing end 41 and a connecting end 42. The swing end 41 can be placed in the lock groove 3. The connecting end 42 is rotatably connected to the right fixed plate 2 and close to the telescopic latch 51. The telescopic latch 51 can make the bolt 4 placed in the lock groove 3 either locked or unlocked. In the locked state, the bolt 4 cannot be removed from the lock groove 3. In the unlocked state, the bolt 4 can swing away from the lock groove 3. The solenoid valve lock 5 in this embodiment includes a stationary armature, a coil winding wound around the stationary armature, and a moving armature (also called a telescopic lock tongue). It is a conventional structure and can be purchased directly from the market.

[0024] In this embodiment, the connecting end 42 of the bolt 4 is provided with a stop 43, which is a block that protrudes from the connecting end 42. The telescopic latch 51 of the solenoid valve lock 5 extends outward to block the stop 43, and the bolt 4 is in a locked state. The telescopic latch 51 of the solenoid valve lock 5 can retract inward to release the stop 43, and the bolt 4 is in an unlocked state. Alternatively, the telescopic latch 51 of the solenoid valve lock 5 can push an intermediate insert rod to block the stop 33 so that the bolt 4 is in a locked state. The intermediate insert rod is movably inserted into the sleeve on the front of the right fixed plate 2, and the sleeve is provided with a spring.

[0025] Furthermore, the bolt 4 in this embodiment also includes a pivot 44, a first handle 4a, and a second handle 4b. One end of the pivot 44 is connected to the connecting end 42, and the other end passes through the right fixing plate 2 and is connected to the first handle 4a on the back of the right fixing plate 2. The swing end 41 is provided with the second handle 4b. When the bolt 4 is placed in the lock groove 3, the second handle 4b is placed in the notch 31, and part of the second handle 4b is exposed outside the notch 31. The notch 31 is designed to facilitate the swinging of the second handle 4b by the operator. The first handle 4a is designed to facilitate the operator to swing the bolt 4 within the construction floor. The second handle 4b is designed to facilitate the operator to swing the bolt 4 within the construction elevator.

[0026] In addition, the construction elevator landing door lock in this embodiment also includes a position sensor. The position sensor is used to sense the position of the construction elevator and output a signal. The position sensor can be an infrared sensor, a Hall sensor, etc. Only after the position sensor senses that the construction elevator has arrived at its destination will the solenoid valve lock 5 give an opening signal, releasing the lock on the door bolt 4, allowing the landing door using this bolt to be opened. The position sensor can be installed on the left fixed plate 1, the right fixed plate 2, the solenoid valve lock 5, or independently on the left fixed plate 1 and the right fixed plate 2, and can also be installed on the landing door. Furthermore, the lock groove 3 in this embodiment is also equipped with a sensor switch 7. The sensor switch 7 is a micro switch or a magnetic induction switch. The sensor switch 7 is used to sense whether the door bolt 4 is placed in the lock groove 3 and output a signal. The signal can be output to the control system, which sends a signal to the solenoid valve lock 5, which locks the door bolt 4. The control system can also give a signal that the elevator can leave the landing door at this location. The position sensor is not shown in this embodiment.

[0027] The construction elevator floor door lock in this embodiment needs to be used in conjunction with the construction elevator control system. It is a safety door lock accessory of the intelligent (driverless) driving system of the construction hoist. The complete system consists of a cage frequency conversion control system, a first-floor call system, external call boxes on each floor, and door lock devices.

[0028] The working principle of this embodiment is as follows: When a worker on a certain floor presses the call button for that floor, the first-floor call system, based on the location and direction of the two hoists, arranges one of the hoists to automatically travel to the target floor, following the principle of proximity and direction. After the hoist reaches the target floor, the main unit inside the hoist sends a command to the external call box of that floor. The external call box controls the telescopic locking tongue 51 of the solenoid valve lock 5 on the floor door to retract inward, releasing the obstruction of the stop 43 on the connection end 42 of the door bolt 4. At this time, the worker on that floor will operate the first handle 4a to swing the door bolt 4 to disengage it from the lock groove 3, pull open the door and enter the hoist. The worker will then operate the second handle 4b on the outside to swing the door bolt 4 to lock it into the lock groove 3 and close the floor door. At this time, the induction switch 7 is triggered, and the signal indicating that the door is closed is sent to the control system. After the hoist door is closed, the hoist's operating conditions are met. The worker inside the hoist presses the floor selection button, and the hoist travels to the selected floor.

[0029] By installing magnetically locked safety doors in the safety passages on each floor, and transmitting the closing signals of each floor to the control system, the system only allows the elevator to enter operation when all floor doors are locked and all safety conditions of the elevator are met. This ensures that no one can enter the area between the safety door and the cage during elevator operation, effectively preventing accidents such as people falling from floor openings and injuries during elevator operation. A position sensor is installed at each floor to detect whether the cage has reached the floor. The position sensor is connected in series with a relay coil, and the door opening button is connected in series with the normally open contact of the relay. This ensures that the magnetically locked safety door can only be opened by pressing the door opening button when the position sensor detects that the cage has reached the floor. This effectively prevents the elevator safety door from opening before the cage has reached the floor, preventing unauthorized entry and further preventing accidents such as people falling from floor openings.

Claims

1. An improved landing door lock for a construction elevator, comprising a left fixing plate (1) and a right fixing plate (2), characterized in that: The left fixing plate (1) has a lock groove (3) on its front side, and the right fixing plate (2) has a swingable bolt (4) and a solenoid valve lock (5) with a telescopic latch (51) on its front side. The bolt (4) has a swing end (41) and a connecting end (42). The swing end (41) can be placed in the lock groove (3). The connecting end (42) is rotatably connected to the right fixing plate (2) and close to the telescopic latch (51). The telescopic latch (51) can make the bolt (4) placed in the lock groove (3) be in a locked state or an unlocked state. In the locked state, the bolt (4) cannot be removed from the lock groove (3). In the unlocked state, the bolt (4) can swing away from the lock groove (3).

2. The construction elevator landing door lock according to claim 1, characterized in that: The connecting end (42) of the bolt (4) is provided with a stop (43). The stop (43) is a hole, a slot, or a block that protrudes from the connecting end (42). The telescopic latch (51) of the solenoid valve lock (5) can block the stop (43) to lock the bolt (4). Alternatively, the telescopic latch (51) of the solenoid valve lock (5) can push an intermediate rod to block the stop (43) to lock the bolt (4).

3. The construction elevator landing door lock according to claim 2, characterized in that: The telescopic latch (51) of the solenoid valve lock (5) can retract inward to release the stop (43), and the bolt (4) is in the unlocked state.

4. The landing door lock for a construction elevator according to claim 1, characterized in that: The bolt (4) also includes a pivot (44), a first handle (4a) and a second handle (4b). One end of the pivot (44) is connected to the connecting end (42), and the other end passes through the right fixing plate (2) and is connected to the first handle (4a) on the back of the right fixing plate (2). The swing end (41) is provided with a second handle (4b).

5. The construction elevator landing door lock according to claim 4, characterized in that: The left fixing plate (1) has an L-shaped plate fixed on its front side to form the lock groove (3). The longitudinal section of the lock groove (3) is U-shaped and its opening faces upward. The vertical plate of the plate has a notch (31). When the bolt (4) is placed in the lock groove (3), the second handle (4b) is placed in the notch (31), and part of the second handle (4b) is exposed outside the notch (31).

6. The landing door lock for a construction elevator according to claim 1, characterized in that: The lock groove (3) is also provided with a sensor switch (7), which is a micro switch or a magnetic induction switch. The sensor switch (7) is used to sense whether the bolt (4) is placed in the lock groove (3) and output a signal.

7. The landing door lock for a construction elevator according to claim 1, characterized in that: It also includes a position sensor, which is used to sense the position of the construction elevator and output a signal.

8. The landing door lock for a construction elevator according to any one of claims 1 to 7, characterized in that: The back of the left fixing plate (1) and the right fixing plate (2) are formed with recesses, and the front of the right fixing plate (2) is also provided with a protective cover (6) for blocking the solenoid valve lock (5).

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