Elevator door lock and swing door device

Abstract

This invention discloses an elevator door lock, including a base plate, a safety mechanism disposed on the base plate, a latch mechanism, and a drive mechanism for moving the latch mechanism. The latch mechanism includes a movable shaft movably disposed on the base plate, a latch fixed to the lower part of the movable shaft, and an elastic element sleeved on the movable shaft. The drive mechanism drives the latch to move upward, and the elastic element drives the latch to move downward. The safety mechanism includes a first limit switch and a corresponding first stop plate, a second limit switch and a corresponding second stop plate, and the first stop plate and / or the second stop plate are fixed on the movable shaft. This elevator door lock achieves locking by using a drive mechanism to drive the latch mechanism, and ensures secure verification of unlocking and locking through the safety mechanism. It effectively reduces the size of the door lock while maintaining locking accuracy, has a wide range of applications, and offers high security.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and more specifically to an elevator door lock suitable for automatic swing doors, and a swing door device including the elevator door lock. Background Technology

[0002] With the advancement of urban development and construction, and the continuous improvement of people's living standards, the market demand for home elevators is also constantly increasing.

[0003] Currently, double-door elevator locks for home platform elevators on the market have the following disadvantages: the double-latch design results in excessive size and requires greater traction force; the mechanical gear drive structure causes locking difficulties when the gears jam, and the locks do not lock automatically in case of emergency power failure, affecting safety; the emergency manual unlocking device is external, occupying a lot of space and wasting space. Summary of the Invention

[0004] In view of this, in order to solve the problems of the prior art, the present invention provides an improved elevator door lock, which is compact in structure and safe and reliable in operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An elevator door lock includes a base plate, a safety mechanism disposed on the base plate, a latch mechanism, and a drive mechanism for moving the latch mechanism. The latch mechanism includes a movable shaft movably disposed on the base plate, a latch fixed to the lower part of the movable shaft, and an elastic element sleeved outside the movable shaft. The drive mechanism is used to drive the latch to move upward, and the elastic element is used to drive the latch to move downward. The safety mechanism includes a first limit switch and a corresponding first stop plate, a second limit switch and a corresponding second stop plate, and the first stop plate and / or the second stop plate are fixed on the movable shaft.

[0007] According to some preferred embodiments of the invention, the drive mechanism includes a driver, a fixture fixed to the movable shaft, and a connector connecting the output end of the driver and the fixture, wherein the driver is used to shorten the length of the connector located between the output end of the driver and the fixture to raise the horizontal height of the fixture.

[0008] According to some preferred embodiments of the present invention, one end of the connector is connected to the output end of the driver, and the other end of the connector is connected to the fixing member. The output end of the driver, the connector, and the fixing member are located in the same vertical plane perpendicular to the base plate. In some embodiments, the connector is preferably a flexible traction rope. The output end of the driver is provided with a drum. One end of the traction rope is fixed to the drum, and the other end is fixed to the fixing member. The fixing member extends toward the driver in a direction perpendicular to the movable shaft. When it is necessary to raise the height of the movable shaft, i.e., the locking tongue, the driver is activated, the drum rotates, the traction rope is wound around the drum, and thus pulls the movable shaft upward. To further increase the reliability of the device, on the one hand, the traction rope is a flat rope body so that the traction rope fits against the drum, and a groove is provided on the drum to accommodate the rope body to prevent the rope body from falling off; on the other hand, a fixing hole is provided on the edge of the drum, the end of the traction rope extends into the fixing hole, and one end of the traction rope is fixed in the fixing hole by bolts, screws, etc.; furthermore, the traction rope is located on the side of the drum away from the base plate to avoid contact with the base plate. The above settings increase the stability of the structure.

[0009] According to some preferred embodiments of the present invention, the base plate includes a first bent plate, the movable shaft movably passes through the first bent plate, the bottom of the movable shaft has a support portion, one end of the elastic element acts on the support portion, and the other end of the elastic element acts on the bent plate; a first buffer pad (ring) is provided between the elastic element and the bent plate. The first bent plate and the support portion support and limit the elastic element, so that the elastic element provides a downward tendency for the latch. The elastic element is preferably a spring. In some embodiments, a stepped portion is further designed above the support portion, the diameter of the stepped portion being smaller than that of the support portion and smaller than the inner diameter of the elastic element, to guide the compression and extension of the elastic element, preventing excessive compression of the elastic element from causing twisting and structural failure.

[0010] According to some preferred embodiments of the present invention, the base plate includes a second bent plate, the locking tongue movably passes through the second bent plate, and a second buffer pad (ring) is provided between the bottom of the movable shaft and the second bent plate. The first buffer pad (ring) and the second buffer pad (ring) achieve a buffering and noise reduction effect.

[0011] According to some preferred embodiments of the present invention, a locking hole is provided on the side of the movable shaft near the base plate, and a waist-shaped hole extending vertically is provided on the base plate corresponding to the locking hole; the locking hole is located between the bottom and top surfaces of the waist-shaped hole. The waist-shaped hole penetrates the thickness direction of the base plate. The locking hole is used for manual unlocking in emergency situations. In special circumstances such as power failure, damage to the door lock motor or actuator, an emergency unlocking can be achieved by inserting a special unlocking rod or other appropriately sized rod through the waist-shaped hole and lifting it upwards. At this time, the elastic element is in a compressed state. After removing the rod, the lock tongue is reset under the action of the elastic element, automatically locking, providing good security and convenient emergency unlocking.

[0012] According to some preferred embodiments of the present invention, the first limit switch has a locking contact, and the first impact plate is located above the locking contact; the second limit switch has an unlocking contact, and the second impact plate is located below the unlocking contact. Specifically, when the motor driver is energized, the drum rotates and winds the traction rope, lifting the latch and unlocking it. Simultaneously, the second impact plate strikes the second limit switch, sending an unlocking signal, which opens the swing door panel, and the elevator stops running. At this time, the spring is in a compressed state. When the motor driver is de-energized, under the action of the elastic element, the latch and the first impact plate move downwards, locking the elevator. Simultaneously, the first impact plate strikes the first limit switch, sending a locking signal, and the elevator starts running.

[0013] According to some preferred embodiments of the present invention, the first impact plate and the second impact plate are fixedly connected, and the first impact plate is fixed to the top of the movable shaft by a connecting plate, so that the first impact plate, the second impact plate and the movable shaft move synchronously. In some embodiments, the first impact plate, the second impact plate and the connecting plate are integrally formed, and the overall cross-section of the first impact plate and the second impact plate forms a C-shape with the opening facing the base plate, thereby placing the first limit switch and the second limit switch between the first impact plate and the second impact plate.

[0014] According to some preferred embodiments of the present invention, a first door contact plate and a second door contact plate are included, with the locking tongue located between the first and second door contact plates. The first and second door contact plates cooperate with a locking block on the door panel to sense whether the door panel is closed or open, thereby initiating subsequent actions and improving the safety of elevator operation. Furthermore, the present invention allows for simultaneous control of both doors with a single locking tongue, effectively reducing the size of the door lock while ensuring locking accuracy, thus having a wide range of applications.

[0015] The present invention also provides a swing door device including the elevator door lock described above.

[0016] Compared with the prior art, the advantages of the present invention are: the elevator door lock of the present invention achieves locking by setting a driving mechanism to drive the locking tongue mechanism, and ensures the safety verification of unlocking and locking by a safety mechanism. While ensuring the accuracy of locking, it effectively reduces the size of the door lock, has a wide range of applications, and high security. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main structure of the door lock in an embodiment of the present invention;

[0019] Figure 2 This is a side view of the hidden components of the door lock in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the main structure after the movable shaft and the impact plate are connected in an embodiment of the present invention;

[0021] Figure 4 This is a side view of the structure after the movable shaft and the impact plate are connected in an embodiment of the present invention;

[0022] The components include: door lock-10, base plate-101, first bending plate-1011, second bending plate-1012, mounting plate-1013, limit ring-1014, first limit switch-1021, second limit switch-1022, locking contact-1023, unlocking contact-1024, first impact plate-1025, second impact plate-1026, connecting plate-1027, movable shaft-1031, and lock. Tongue-1032, elastic element-1033, support part-1034, fixing part-1035, unlocking hole-1036, driver-1041, connector-1042, drum-1043, fixing hole-1044, first buffer pad-1051, second buffer pad-1052, first door contact plate-1061, second door contact plate-1062, insertion hole-1063, wiring port-107. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of the present invention, 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 should fall within the scope of protection of the present invention.

[0024] In this embodiment, the home elevator is a double-door configuration with a swing door device, which includes two door panels arranged symmetrically on the left and right, a door lock 10 located at the top of the middle position between the two door panels (the axis of symmetry between the two door panels), and other conventional components; the door lock 10 is used to lock the two door panels to fix their positions or release them so that the two door panels can move freely.

[0025] like Figure 1-4 As shown, the elevator door lock 10 in this embodiment includes a base plate 101, a wiring port 107, a safety mechanism mounted on the base plate 101, a latch mechanism, a drive mechanism for moving the latch mechanism, and a first door contact plate 1061 and a second door contact plate 1062 that cooperate with the two door panels. In this embodiment, a mounting plate 1013 for mounting the door contact plates is provided on the base plate. The wiring port 107 is used for electrical and signal connection with the control board in the swing door device.

[0026] The locking mechanism in this embodiment includes a movable shaft 1031 movably mounted on a base plate 101, a locking tongue 1032 fixed to the lower part of the movable shaft 1031, and an elastic member 1033 sleeved on the movable shaft 1031. The base plate 101 includes a first bending plate 1011 and a second bending plate 1012 for the movable shaft 1031 to move through it. The first bending plate 1011 is located above the second bending plate 1012. The bottom of the movable shaft 1031 has a support portion 1034. One end of the elastic member 1033 acts on the support portion 1034, and the other end of the elastic member 1033 acts on the first bending plate 1011. A first buffer pad (ring) 1051 is provided between the elastic member 1033 and the first bending plate 1011. A limiting ring 1014 is also provided below the support portion 1034. A second buffer pad (ring) 1052 is provided between the limiting ring 1014 and the second bending plate 1012. The limiting ring 1014 and the second buffer pad (ring) 1052 cooperate to limit the locking action. At the same time, the first buffer pad 1051 and the second buffer pad 1052 achieve the function of buffering and noise reduction. The first bending plate 1011 and the support portion 1034 support and limit the elastic member 1033, so that the elastic member 1033 provides a downward tendency for the locking tongue 1032. The elastic member 1033 is preferably a spring.

[0027] In this embodiment, a stepped section is designed above the support 1034. The diameter of the stepped section is smaller than that of the support 1034 and smaller than that of the inner diameter of the elastic member 1033, so as to guide the compression and extension of the elastic member 1033 and prevent the elastic member 1033 from being twisted due to excessive compression range, which would lead to structural failure.

[0028] In this embodiment, the latch 1032 is located between the first door contact plate 1061 and the second door contact plate 1062, that is, the latch 1032 is located between the two door plates and is used to lock both door plates simultaneously. The door plates have grooves for the latch 1032 to be inserted. The first door contact plate 1061 and the second door contact plate 1062 have insertion holes 1063, which cooperate with the inserts on the door plates to sense whether the door plates are fully closed, thereby performing subsequent actions and improving the safety of elevator operation. Furthermore, this embodiment uses a single latch 1032 to control both doors simultaneously, effectively reducing the size of the door lock 10 while ensuring locking accuracy, and has a wide range of applications.

[0029] The drive mechanism drives the latch 1032 to move upward, and the elastic element 1033 drives the latch 1032 to move downward. In this embodiment, the drive mechanism includes a driver 1041, a fixing member 1035 fixed to the movable shaft 1031, and a connector 1042 connecting the output end of the driver 1041 and the fixing member 1035. The driver 1041 shortens the length of the connector 1042 located between the output end of the driver 1041 and the fixing member 1035 to raise the horizontal height of the fixing member 1035. The driver 1041 is preferably a motor. One end of the connector 1042 is connected to the output end of the driver 1041, and the other end of the connector 1042 is connected to the fixing member 1035. The output end of the driver 1041, the connector 1042, and the fixing member 1035 are located in the same vertical plane perpendicular to the base plate 101.

[0030] In this embodiment, the connector 1042 is preferably a flexible traction rope, and the output end of the driver 1041 is provided with a drum 1043. One end of the traction rope is fixed to the drum 1043, and the other end is fixed to the fixing member 1035. The fixing member extends toward the driver 1041 in a direction perpendicular to the movable shaft 1031. When it is necessary to raise the height of the movable shaft 1031, i.e., the locking tongue 1032, the driver 1041 is activated, the drum 1043 rotates, the traction rope is wound around the drum 1043, and thus pulls the movable shaft 1031 upward. Furthermore, to further enhance structural reliability in this embodiment, the traction rope is flat, allowing it to fit snugly against the drum 1043. A groove is provided on the drum 1043 to accommodate the rope and prevent it from slipping off. Additionally, a fixing hole 1044 is provided on the edge of the drum 1043, and the end of the traction rope extends into this hole, where it is secured with bolts or screws. Moreover, the traction rope is positioned on the side of the drum 1043 furthest from the base plate 101 to avoid contact with it. These features enhance the structural reliability and stability.

[0031] The safety mechanism in this embodiment includes a first limit switch 1021 and a corresponding first impact plate 1025, a second limit switch 1022 and a corresponding second impact plate 1026, and the first impact plate 1025 and the second impact plate 1026 are fixed on the movable shaft 1031. Specifically, the first impact plate 1025 and the second impact plate 1026 are fixedly connected, and the first impact plate 1025 is fixed to the top of the movable shaft 1031 through a connecting plate 1027, so that the first impact plate 1025, the second impact plate 1026 and the movable shaft 1031 move synchronously.

[0032] In this embodiment, the first impact plate 1025, the second impact plate 1026 and the connecting plate 1027 are integrally formed, and the overall cross-section of the first impact plate 1025 and the second impact plate 1026 forms a C-shape with the opening facing the base plate 101, thereby placing the first limit switch 1021 and the second limit switch 1022 between the first impact plate 1025 and the second impact plate 1026.

[0033] The first limit switch 1021 has a locking contact 1023, and the first impact plate 1025 is located above the locking contact 1023; the second limit switch 1022 has an unlocking contact 1024, and the second impact plate 1026 is located below the unlocking contact 1024. Specifically, when the driver 1041 is energized, the drum 1043 rotates and winds the traction rope, lifting the latch 1032 and unlocking it. At the same time, the second impact plate 1026 strikes the second limit switch 1022, giving an unlocking signal, which opens the swing door panel, and the elevator stops running. At this time, the spring is in a compressed state. When the motor driver 1041 is de-energized, under the action of the elastic element 1033, the latch 1032 and the first impact plate 1025 move downward and insert into the groove, locking the elevator. At the same time, the first impact plate 1025 strikes the first limit switch 1021, giving an locking signal, and the elevator starts running.

[0034] To facilitate emergency unlocking and avoid the space-consuming nature of emergency manual unlocking devices, this embodiment provides an unlocking hole 1036 on the side of the movable shaft 1031 near the base plate 101. A waist-shaped hole extending vertically is provided on the base plate 101 corresponding to the unlocking hole 1036; the unlocking hole 1036 is located between the bottom and top surfaces of the waist-shaped hole. The waist-shaped hole penetrates the thickness direction of the base plate 101. The unlocking hole 1036 is used for manual unlocking in emergency situations. In special circumstances such as power failure, damage to the door lock motor or driver 1041, an emergency unlock can be achieved by inserting a special unlocking rod or other appropriately sized rod through the waist-shaped hole and into the unlocking hole 1036, then lifting it upwards. At this time, the elastic element 1033 is in a compressed state. After removing the rod, the lock tongue 1032 resets under the action of the elastic element 1033, automatically locking the door. This provides good security and convenient emergency unlocking.

[0035] The following is a brief description of the working process of the door lock 10 in this embodiment:

[0036] When the swing door needs to be opened, the driver 1041 starts, and the drum 1043 rotates, causing the traction rope to wind around the drum 1043. Through the fixing member 1035, the movable shaft 1031 and the locking tongue 1032 move upward, causing the locking tongue 1032 to disengage from the groove at the upper end of the door panel, allowing the door panel to open freely. At the same time, the second impact plate 1026 on the movable shaft 1031 strikes the second limit switch 1022, sending an unlocking signal, thereby opening the swing door panel, stopping the elevator, and at this time the spring is in a compressed state.

[0037] When the swing door needs to be closed, the insert on the door panel is inserted into the door contact plate on the door lock 10, the driver 1041 is de-energized, and the latch 1032 automatically locks under the restoring force of the elastic element 1033. At the same time, the first impact plate 1025 on the movable shaft 1031 moves downward, striking the first limit switch 1021, giving a locking signal, and the elevator starts running.

[0038] The elevator door lock of this invention features a single latch design, resulting in a compact structure. The motor pulls the latch via a rope, ensuring smooth latch movement and reliable structure. The emergency manual unlocking design is located behind the lock, reducing space occupation. The integrated door panel positioning detection contacts conceal all wiring locations, leading to a cleaner appearance.

[0039] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An elevator with double doors, characterized in that, A swing door device includes two symmetrically arranged door panels and a door lock located at the top center between the two door panels. The door lock is used to lock the two door panels to fix their positions or to release them so that they can move freely. The door lock includes a base plate, a safety mechanism disposed on the base plate, a latch mechanism, and a drive mechanism for moving the latch mechanism. The latch mechanism includes a movable shaft movably disposed on the base plate, a latch fixed to the lower part of the movable shaft, and an elastic element sleeved outside the movable shaft. The drive mechanism is used to drive the latch to move upward, and the elastic element is used to drive the latch to move downward. The safety mechanism includes a first limit switch and a corresponding first stop plate, a second limit switch and a corresponding second stop plate, and the first stop plate and / or the second stop plate are fixed on the movable shaft. The drive mechanism includes a driver, a fixture fixed on the movable shaft, and a connector connecting the output end of the driver and the fixture. The driver is used to shorten the length of the connector located between the output end of the driver and the fixture to raise the horizontal height of the fixture. One end of the connector is connected to the output end of the driver, and the other end of the connector is connected to the fixing member. The output end of the driver, the connector, and the fixing member are located in the same vertical plane perpendicular to the base plate. The output end of the driver is provided with a drum, and the edge of the drum is provided with a fixing hole. The end of the connector extends and is fixed in the fixing hole. The connector is a flexible and flat traction rope. When the drum rotates, the traction rope is attached to the drum. The drum is provided with a groove for accommodating the traction rope. The traction rope is located on the side of the drum away from the bottom plate. The movable shaft has a locking hole on the side near the base plate, and a waist-shaped hole extending vertically is provided on the base plate corresponding to the locking hole. The locking hole is located between the bottom and top surfaces of the waist-shaped hole, and the waist-shaped hole penetrates the thickness direction of the base plate. The locking hole is used for manual unlocking in an emergency. By inserting a special unlocking rod or other rod-shaped object through the waist-shaped hole and lifting it upward, emergency unlocking can be achieved. At this time, the elastic element is in a compressed state. After the rod-shaped object is removed, the lock tongue is reset under the action of the elastic element, and the lock automatically closes. The base plate includes a first bent plate, the movable shaft moves through the first bent plate, the bottom of the movable shaft has a support portion, one end of the elastic element acts on the support portion, and the other end of the elastic element acts on the first bent plate; a first buffer pad is provided between the elastic element and the first bent plate; a step portion is also provided above the support portion, the diameter of the step portion is smaller than the support portion and smaller than the inner diameter of the elastic element, so as to guide the compression and extension of the elastic element; The base plate includes a second bent plate, the locking tongue moves through the second bent plate, and a second buffer pad is provided between the bottom of the movable shaft and the second bent plate; The movable shaft has a locking hole on the side near the base plate, and the base plate has an oblong hole extending vertically corresponding to the locking hole; The unlocking hole is located between the bottom and top surfaces of the oblong hole; The first limit switch has a locking contact, and the first impact plate is located above the locking contact; the second limit switch has an unlocking contact, and the second impact plate is located below the unlocking contact; the first impact plate, the second impact plate, and the connecting plate are integrally formed, and the overall cross-section of the first impact plate and the second impact plate forms a C-shape with the opening facing the bottom plate, thereby placing the first limit switch and the second limit switch between the first impact plate and the second impact plate; The support portion is also designed with a stepped portion above it. The diameter of the stepped portion is smaller than that of the support portion and smaller than the inner diameter of the elastic element, so as to guide the compression and extension of the elastic element. The latch is located between the two door panels and is used to lock the two door panels at the same time. The door panel has a groove for the latch to be inserted. The door lock is a single latch that controls both doors at the same time. It includes a first door contact plate and a second door contact plate, with the lock tongue located between the first door contact plate and the second door contact plate; the first door contact plate and the second door contact plate are provided with insertion holes for cooperating with the insert block on the door panel to sense whether the door panel is closed.

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