Locking device for safety door

Abstract

The utility model discloses a locking device for a safety door, which belongs to the technical field of urban rail transit, and comprises a fixed shell, a left electromagnetic suction device and a right electromagnetic suction device are arranged on two sides in the fixed shell, and the left electromagnetic suction device and the right electromagnetic suction device are connected with a left lock hook and a right lock hook; the outer side surfaces of the left lock hook and the right lock hook are inclined surfaces respectively; a left microswitch and a right microswitch are arranged above the left electromagnetic suction device and the right electromagnetic suction device and are used for sending out a door opening signal; the left electromagnetic suction device, the right electromagnetic suction device, the left microswitch and the right microswitch are connected with the aviation plug through the connecting wire harness and used for providing signals and a power source. The device has the advantages of being simple in structure, reliable in work and convenient to install and debug.

Description

Technical Field

[0001] The utility model relates to a locking device for a safety door, belonging to the technical field of urban rail transit. Background Art

[0002] The existing locking devices for rail transit safety doors have various and complex structures, which bring complicated work to the manufacture, installation and commissioning of the locking devices.

[0003] CN 101666189 B discloses a locking device for a rail transit platform screen door, which includes a lock base and a locking mechanism, an electromagnetic unlocking mechanism, a manual unlocking mechanism and a signal generating mechanism installed on the lock base. The locking mechanism is arranged on the front side of the lock base and includes symmetrically arranged left and right lock blocks and left and right lock tongues. The left and right lock blocks and the left and right lock tongues are respectively rotatably installed on the lock base. A lock block return spring is connected between the left and right lock blocks, and a lock tongue return spring is connected between the left and right lock tongues. A locking and unlocking relationship is formed between the left lock block and the left lock tongue, and a locking and unlocking relationship is formed between the right lock block and the right lock tongue. It realizes the locking and unlocking of the sliding door by limiting the sliding door limit pin connected to the sliding door through the left and right lock blocks. Its disadvantages are as follows: 1. The return of both the left and right lock blocks and the left and right lock tongues adopts return springs. In the closed state of the car door, the return springs are in a stretched state. Therefore, long-term stretching is likely to cause the springs to fatigue and fail. At the same time, there is also a problem that the fatigue degrees of the lock block return spring and the lock tongue return spring are inconsistent, resulting in the asynchronous return of the lock block and the lock tongue, causing jamming. 2. The gap requirement between the lock block and the sliding door limit pin is high. Too large or too small a gap may cause jamming. 3. The gap requirements for the cooperation between the lock block and the lock tongue are relatively high, and jamming is likely to occur. In summary, the curved groove of the lock block used for locking with the sliding door limit pin is difficult to machine and requires high precision. The lock hook of the lock tongue locked with the lower arm of the lock block also needs good cooperation to unlock and lock smoothly. The return spring is in a stretched state for a long time and is prone to fatigue failure.

[0004] Therefore, a locking device for a safety door with a simple structure, reliable operation, and convenient installation and commissioning has become the goal pursued by those skilled in the art. Summary of the Invention

[0005] The purpose of the utility model is to solve the problems of the complex structure, high machining precision requirements, and great difficulties in machining, installation and commissioning of the existing locking devices for safety doors.

[0006] To achieve the above-mentioned invention object, the technical solution of the present utility model is: A locking device for a safety door, which includes: A fixed housing in the shape of a cube, on both sides inside the fixed housing, a left electromagnetic attractor and a right electromagnetic attractor are symmetrically arranged left and right. The lower ends of the left push rod and the right push rod of the left electromagnetic attractor and the right electromagnetic attractor are connected with a left locking hook and a right locking hook. The lower end of the fixed housing has through holes for the left locking hook and the right locking hook to extend out; The left outer side and the right outer side of the left locking hook and the right locking hook are both bevel-shaped; Above the left electromagnetic attractor and the right electromagnetic attractor, a left microswitch and a right microswitch are provided. The trigger rods of the left microswitch and the right microswitch are pushed by the upper ends of the left push rod and the right push rod of the left electromagnetic attractor and the right electromagnetic attractor to be triggered, and send out signals for unlocking the left locking hook and the right locking hook to be lifted; The left electromagnetic attractor, the right electromagnetic attractor, the left microswitch and the right microswitch are respectively connected to an aviation plug through a connecting wire harness for providing signals and power supply, and the aviation plug is hermetically installed in the fixed housing.

[0007] The inclination angles α of the left outer bevel and the right outer bevel of the left locking hook and the right locking hook are 25-30 degrees, preferably 27 degrees. Setting the inclination angle α to 27 degrees can ensure the smooth release of the sliding between the lock pin and the locking hook.

[0008] Both sides of the fixed housing have two flanges.

[0009] Due to the adoption of the above technical solution, the present utility model symmetrically arranges the left electromagnetic attractor and the right electromagnetic attractor. When electrified and de-energized, the left locking hook and the right locking hook are controlled by the left electromagnetic attractor and the right electromagnetic attractor to be lifted and lowered, so as to lock and release the lock pins on the left and right safety doors, thereby realizing opening and locking. At the same time, through the left microswitch and the right microswitch arranged above the left electromagnetic attractor and the right electromagnetic attractor, it realizes the transmission of the platform door opening signal to the control system to feedback the opening or unlocking signal indicating that the platform door is in the open state. The present utility model has the advantages of simple structure, reliable operation, and convenient installation and debugging.

[0010] The locking device described in the present utility model is used in the subway platform door equipment. The subway platform door can isolate the platform public area from the vehicle, playing a role in safety protection. When the vehicle stops at the platform, the platform door and the car door are opened synchronously to facilitate passengers to get on and off normally. When the vehicle is about to leave, the platform door and the car door are closed synchronously to play a role in safety isolation. At this time, the locking device of the platform door plays a role. After the door body is closed, since the left electromagnetic attractor and the right electromagnetic attractor are in a de-energized state, the locking device locks the lock pins of the platform door through the left locking hook and the right locking hook, restricting the movement of the lock pins of the safety door, thereby playing a role in safety protection between the platform and the track and preventing the platform door from being opened manually.

[0011] For the locking device for a safety door described in the present utility model, the inclination angle α of the left outer inclined surface and the right outer inclined surface of the left locking hook and the right locking hook is preferably 27 degrees. When closing the door, this is conducive to the locking pin on the safety door easily pushing the left locking hook and the right locking hook upward, so as to enter the locked position. Brief Description of the Drawings

[0012] Figure 1 is an external view of the locking device for a safety door described in the present utility model;

[0013] Figure 2 is a schematic structural diagram of the locking device for a safety door described in the present utility model;

[0014] Figure 3 is an open state diagram when the locking device for a safety door described in the present utility model is in use;

[0015] Figure 4 is a state diagram when the locking device for a safety door described in the present utility model is closing the door;

[0016] Figure 5 is a locked state diagram when the locking device for a safety door described in the present utility model has completed closing the door.

[0017] Description of the Reference Numerals in the Drawings: Fixed housing 1, through hole 11, flange 12; left microswitch 2, left electromagnetic attractor 3, left locking hook 4, right locking hook 5, right electromagnetic attractor 6, right microswitch 7, connecting wire harness 8, and aviation plug 9. Detailed Embodiment

[0018] The following will give a detailed example of the preferred embodiment of the present utility model in conjunction with the drawings, but the protection scope of the present utility model cannot be limited by this preferred embodiment.

[0019] See Figure 1-2, The figure shows a locking device for a safety door according to the present utility model, which includes: a fixed housing 1 in the shape of a cube. On both sides inside the fixed housing 1, a left electromagnetic attractor 3 and a right electromagnetic attractor 6 are symmetrically arranged left and right. The lower end of the left push rod 31 of the left electromagnetic attractor 3 is connected to a left locking hook 4, and the lower end of the right push rod 61 of the right electromagnetic attractor 6 is connected to a right locking hook 5. The lower end of the fixed housing 1 has a through hole 11 for the left locking hook 4 and the right locking hook 5 to extend out; the left outer side surface of the left locking hook 4 is beveled, and the right outer side surface of the right locking hook 5 is beveled; above the left electromagnetic attractor 3 and the right electromagnetic attractor 6, a left microswitch 2 and a right microswitch 7 are provided. The trigger rods of the left microswitch 2 and the right microswitch 7 are pushed by the upper ends of the left push rod and the right push rod of the left electromagnetic attractor 3 and the right electromagnetic attractor 6 respectively to be triggered, and send out unlocking signals for the left locking hook 4 and the right locking hook 5 to lift. The left electromagnetic attractor 3, the right electromagnetic attractor 6, the left microswitch 2 and the right microswitch 7 are respectively connected to an aviation plug 9 through a connecting wire harness 8 for providing signals and power. The aviation plug 9 is hermetically installed on the fixed housing 1, and the connecting wire harness 8 is led out of the safety door locking device through the aviation plug 9. The aviation plug 9 serves to seal the cable.

[0020] The inclination angle α of the bevels of the left locking hook 4 and the right locking hook 5 is 25 - 30 degrees, preferably 27 degrees. In this embodiment, setting the inclination angle α to 27 degrees can ensure the smooth sliding release of the locking pin and the locking hook.

[0021] Both sides of the fixed housing 1 have two flanges 12 for fixing the locking device above the central position of the safety door.

[0022] See Figure 3 、 4 、5. When in use, when opening the door, after the left electromagnetic attractor 3 and the right electromagnetic attractor 6 receive signals, the power is turned on, and they attract to raise the left push rod 31 and the right push rod 61, driving the left locking hook 4 and the right locking hook 5 to lift, thus releasing the locking pin 201 on the main hanger 200 on the safety door; the safety door opens to both sides; at the same time, the left push rod 31 and the right push rod 61 trigger the left microswitch 2 and the right microswitch 7 upward. After the left microswitch 2 and the right microswitch 7 are triggered, they send the door-opening signal to the control system, feedback the platform door opening signal, and the platform door is in the open state. When closing the door, the platform door drives the main hanger assembly 200 and the locking pin 201 at the end of the main hanger assembly 200 to move towards the center. The locking pin 201 impacts and pushes the left locking hook 4 and the right locking hook 5 to move upward. After entering the locking position, the left locking hook 4 and the right locking hook 5 fall under the action of gravity to lock the locking pin 201, realizing door closing.

[0023] The above description is illustrative rather than restrictive to the present utility model. The present utility model aims to provide a locking device for a security door. Those of ordinary skill in the art understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the claims. For example, changing the shape of the fixed housing, but all will fall within the protection scope of the present utility model.

Claims

1. A locking device for a security door, comprising: A fixed cube-shaped housing (1), characterized in that a left electromagnetic sucker (3) and a right electromagnetic sucker (6) are symmetrically arranged on the left and right sides inside the fixed housing (1). The lower ends of the left push rod and the right push rod of the left electromagnetic sucker (3) and the right electromagnetic sucker (6) are connected to a left locking hook (4) and a right locking hook (5). The lower end of the fixed housing (1) has through holes (11) for the left locking hook (4) and the right locking hook (5) to extend out. The left outer side and the right outer side of the left locking hook (4) and the right locking hook (5) are respectively inclined surfaces. Above the left electromagnetic sucker (3) and the right electromagnetic sucker (6), there are a left microswitch (2) and a right microswitch (7). The trigger rods of the left microswitch (2) and the right microswitch (7) are pushed by the upper ends of the left push rod and the right push rod of the left electromagnetic sucker (3) and the right electromagnetic sucker (6) to be triggered, and send out signals for unlocking the upward lifting of the left locking hook (4) and the right locking hook (5). The left electromagnetic sucker (3), the right electromagnetic sucker (6), the left microswitch (2) and the right microswitch (7) are respectively connected to an aviation plug (9) through connecting wire bundles (8) for providing signals and power supply. The aviation plug (9) is installed on the fixed housing (1).

2. The locking device for a security door according to claim 1, characterized in that: The inclination angle α of the left outer inclined surface and the right outer inclined surface of the left locking hook (4) and the right locking hook (5) is 25 - 30 degrees.

3. The locking device for a security door according to claim 2, characterized in that: The inclination angle α of the left outer inclined surface and the right outer inclined surface of the left locking hook (4) and the right locking hook (5) is 27 degrees.

4. A locking device for a security door according to any one of claims 1-3, characterized in that: Both sides of the fixed housing (1) have two flanges (12).

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