Emergency evacuation door locking device

Abstract

The invention discloses an emergency evacuation door locking device which comprises a lock hook and a shifting block which are rotationally connected, the side wall of the lock hook is provided with a locking area, a first locking notch and a second locking notch, the lock hook is connected with a pull rod, the shifting block is connected with a first spring, and during locking, the pull rod drives the lock hook to rotate, so that the lock hook is locked. The shifting block is driven by the first spring to be clamped into the second locking notch. According to the safety lock, the pull rod is arranged to drive the lock hook to rotate, meanwhile, the acting force applied to the lock hook is amplified, the locking reliability is improved, locking, unlocking, locking and unlocking of the lock hook safety mechanism and locking and unlocking of the handle safety mechanism can be completed through one-step operation, and operation is easy and stable.

Description

Technical Field

[0001] The invention relates to a door locking device, in particular to an emergency evacuation door locking device. Background Art

[0002] When the rail transit train door system is in the retracted state, the front door (door leaf) is located on the outside and the ladder is located on the front inside. After retraction, the front door on the outside needs to be locked. Whether the front door can be reliably locked and quickly unlocked, and whether the door lock has been received in place, is related to the safety of train operation and evacuation.

[0003] The invention patent with the publication number CN 217712117 U discloses a wire lock, including a rotating rocker arm and a lock fork. The notch at one end of the lock fork forms a locking area, and two engaging areas are set at the other end. The first engaging area is used to prevent mis-clamping, and the second engaging area is used for locking. A ratchet is set at one end of the rocker arm, and a pull wire is set at the other end. After the lock rod connected to the door enters the locking area, it pushes the lock fork to rotate, and the ratchet of the rocker arm passes through the first and stays in the second engaging area, so that the door is locked. When unlocking, the pull wire is pulled to drive the ratchet to leave the engaging area, and the lock fork can be unlocked; in this scheme, when closing the door leaf, if the force of driving the door leaf is small, the ratchet will stay in the first engaging area, and the door leaf needs to be pushed twice or the closing force is increased to ensure one-time locking; the lock fork is connected to a torsion spring for unlocking. When locked, the torsion spring is compressed, which reduces the locking force of the lock fork. In the field of rail transit, the functions of door leaves are more numerous and complex, and it is impossible to increase the driving force of the door leaf to improve the locking effectiveness. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide an emergency evacuation door locking device to reduce locking impact and improve locking reliability.

[0005] Technical solution: The emergency evacuation door locking device described in the present invention includes a rotatably connected lock hook and a shift block. The side wall of the lock hook is provided with a locking area, a first locking notch, and a second locking notch. The lock hook is connected to a pull rod, and the shift block is connected to a first spring. When locking, the pull rod drives the lock hook to rotate, and the shift block is driven by the first spring to engage in the second locking notch.

[0006] Preferably, in order to release the restriction of the shift block in one step, the lock hook is unlocked and also includes a handle, wherein the handle has a rotating shaft supporting the handle to rotate, and the handles on both sides of the rotating shaft are respectively connected to the pull rod and the shift block. When unlocking, the handle drives the lock hook and the shift block to rotate, and the shift block and the lock hook rotate in the same direction.

[0007] Preferably, in order to release the restriction of the shift block first and reduce the interference of the shift block on the lock hook, the handle is provided with an arc groove, and the pull rod is connected to the handle through the arc groove and the first pin. The connecting pin between the pull rod and the handle can slide in the arc groove.

[0008] Preferably, in order to solve the problem that the handle rotates due to its own weight after unlocking and the locking area deviates from the locking rod, the handle is connected to a first safety mechanism, and after unlocking, the first safety structure prevents the handle from rotating.

[0009] Preferably, in order to achieve a one-step operation, that is, to prevent the handle from rotating when unlocking, the first safety mechanism includes a shaft and a rotating seat. The rotating seat is located on the side of the handle away from the lock hook, and the shaft is sleeved in the rotating seat. The handle is hinged to the shaft through a second pin shaft, and a second spring is provided on the shaft between the second pin shaft and the rotating seat. The connecting line between the center of the rotating shaft and the center of the rotating seat is taken as the first reference line. When unlocking and locking, the second pin shaft is respectively located on both sides of the first reference line.

[0010] Preferably, in order to prevent the second spring force from affecting the locking effect, that is, to give the handle a supporting force when unlocking, and at the same time to avoid applying force to the handle after unlocking, the second pin shaft and the shift block are simultaneously connected to the handle on the same side of the rotating shaft, and the handles on both sides of the rotating shaft are bent toward the rotating seat. When unlocking, the second pin shaft is located on the side of the first reference line close to the pull rod, and the second spring is compressed.

[0011] Preferably, in order to prevent the rotating shaft from affecting the handle driving the shift block, a branch for connecting the shift block extends from the handle between the second pin and the rotating shaft.

[0012] Preferably, in order to avoid passing the dead point and making unlocking inconvenient, the lock hook and the pull rod are connected by a third pin shaft, with the connecting line of the center of the installation axis supporting the rotation of the lock hook and the center of the first pin shaft as the second reference line. When unlocking and locking, the third pin shaft is located on the same side of the second reference line.

[0013] Preferably, in order to reduce the force required for unlocking and facilitate the application of force, the end of the pull rod close to the lock hook is bent, and the handles on both sides of the arc groove are bent.

[0014] Preferably, a second safety mechanism is provided on the side of the handle, and the second safety mechanism includes a stop block connected to the handle and a stop bracket connected to the vehicle body. When locked, the stop block and the stop bracket are at the same height, and the stop block and the stop bracket are connected by a pin.

[0015] Preferably, in order to prevent the second spring force from affecting the locking effect, the rotating seat is located on a side of the handle away from the locking hook.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. Reducing the impact of door leaf locking: By setting a pull rod, the lock hook is driven to rotate instead of the door leaf, so that the door leaf can be locked, thereby reducing the impact of door leaf locking. The pull rod can amplify the force applied to the lock hook, thereby improving the reliability of rail transit door leaf locking; 2. Simple and stable operation: directly operate the handle to complete locking, unlocking, locking and unlocking of the lock hook safety mechanism, and locking and unlocking of the handle safety mechanism. The operation is simple. No matter unlocking or locking, after the operation, the position of the handle and the lock hook does not change, which is stable and convenient for the next operation; 3. It is suitable for rail door systems, occupies a small space, and has little impact on the size of the existing door system; 4. It is easy to install and debug. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front structural schematic diagram of the emergency evacuation door locking device of the present invention in a locked state;

[0018] Figure 2 It is a front structural schematic diagram of the emergency evacuation door locking device of the present invention in the unlocked state;

[0019] Figure 3 It is a schematic diagram of the back structure of the emergency evacuation door locking device of the present invention in a locked state;

[0020] Figure 4 It is a schematic diagram of the back structure of the emergency evacuation door locking device of the present invention in the unlocked state. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 4 The locking device is connected to the rail transit vehicle body or door frame. The head end of the lock hook 3 of the locking device has an open groove, which is used to form a locking area. When locked, it hooks the lock stopper / locking rod installed on the door leaf to lock the door leaf. The middle part of the lock hook 3 has a mounting shaft 2, which is connected to the vehicle body through a mounting seat. The lock hook 3 rotates around the mounting shaft 2. The tail end of the lock hook 3 (the other end opposite to the open groove) is hinged to the pull rod 5 through the pin shaft 4. The pull rod 5 drives the lock hook 3 to rotate. The outer contour of the bottom of the head end of the lock hook 3 has double notches. For the convenience of description, the double notches are named the first locking notch and the second locking notch respectively.

[0023] There is a shift block 17 below the lock hook 3. The shift block 17 is a safety mechanism of the lock hook 3. The shift block 17 can be inserted into the first locking notch or the second locking notch. Specifically, the shift block 17 has a rotating shaft 18 that supports its rotation. Similarly, the rotating shaft 18 is connected to the vehicle body through a mounting seat. The shift block 17 is a three-branch structure. The first branch is close to the lock hook 3 and is used to extend into the first locking notch or the second locking notch; the second branch is used to connect the spring 16, and the spring 16 drives the shift block 17 to rotate so that the first branch can enter the double notch. The third branch is used to connect the connecting member 12, and the connecting member 12 is used to drive the shift block 17 to rotate around the rotating shaft 18 so that the first branch leaves the notch. The connecting member 12 can be a steel rope to reduce impact vibration and noise. The end of the spring 16 away from the shift block 17 has a support 15, and the support 15 is used to fix the position of the spring 16. The spring 16 can also be replaced with a torsion spring, preferably a spring.

[0024] The pull rod 5 is driven by the handle 6, and the handle has a rotating shaft 13 that supports its own rotation. The rotating shaft 13 is connected to the vehicle body through a mounting seat, and the handles on both sides of the rotating shaft 13 are respectively connected to the pull rod 5 and the shift block 17. When unlocking, the handle 6 is lifted, and the handle 6 drives the lock hook 3 and the shift block 17 to rotate. The shift block 17 rotates in the same direction as the lock hook 3, and the shift block 17 leaves the locking notch, the safety is released, the lock hook 3 rotates, and the lock block / lock rod can leave the locking area. Specifically, an arc groove is provided in the middle of one end where the handle 6 and the pull rod 5 are connected, and the pull rod 5 is connected to the arc groove of the handle 6 through a pin shaft. When the handle 6 is lifted, the pin shaft slides along the arc groove, which can drive the shift block 117 to rotate but cannot drive the lock hook. After the lock hook safety is released, the lock hook 3 can rotate to release the lock block / lock rod restriction. The center of the installation axis 2 of the lock hook 3 and the center of the pin between the pull rod 5 and the handle 6 are connected as the reference line A. When unlocking and locking, the pin 4 is located on the same side of the reference line A to avoid dead points during the locking process. The handles 6 on both sides of the arc groove are bent, and the ends of the handles are provided with anti-slip rubber sleeves and gripping patterns to facilitate the application of force when locking and unlocking.

[0025] When the handle 6 is lifted to unlock, the handle 6 will fall due to its own weight, causing the open groove of the lock hook 3 connected to the handle 6 to deviate from the preset position, and the lock block / lock rod cannot enter accurately. In order to solve this problem, a handle safety mechanism is provided on the handle 6. The handle safety mechanism can be a structure such as a latch, or it can be other structures. In order to facilitate operation, the handle safety mechanism includes a shaft 8 and a rotating seat 9. The rotating seat 9 is located on the lower side of the handle 6 away from the lock hook 3. The rotating seat 9 is connected to the vehicle body and can rotate around its rotating axis. The shaft 8 is sleeved in the rotating seat 9. The handle 6 is hinged to the shaft 8 through a pin 11. The shaft 8 between the pin 11 and the rotating seat 9 is sleeved with a spring 10. When the handle 6 is rotated, the shaft 8 is driven to swing around the rotating seat 9 while the shaft 8 slides in the rotating seat 9. The connecting line between the center of the rotating shaft 13 and the center of the rotating seat 9 is used as the reference line B. When unlocking and locking, the second pin 11 is located on both sides of the reference line B respectively.

[0026] The connecting line between the center of the rotating shaft 13 and the center of the rotating seat 9 is the dead point reference line. When locking and unlocking, the pin shaft 11 is located on both sides of the reference line B, with different torque directions, effectively preventing the handle from rotating.

[0027] In order to unlock the handle 6 by applying the spring 10 upward ( Figure 2 The spring 10 is in an unstressed state when the handle 6 is locked and has a bending direction opposite to that of the fourth branch to prevent the connector from being released from the rotating shaft 13 and affecting the shift block 17 when the handle 6 is rotated.

[0028] A stopper assembly is connected to one side of the handle 6, and the stopper assembly includes a stopper block and a stopper bracket 7. The stopper block is connected to the handle 6, and the stopper bracket 7 is connected to the vehicle body or the door frame. When the handle 6 drives the lock hook 3 to hook the lock stopper, the stopper block and the stopper bracket 7 are at the same height, and a safety pin (not shown) is used to connect the stopper block and the stopper bracket 7, so that the handle 6 is locked and the door leaf is retracted and locked.

[0029] When closing the door, Figure 2 , the lock block on the door leaf collides with the lock hook 3, pushing the lock hook 3 to rotate clockwise, and then pushing the handle 6 to rotate, the handle 6 releases part of the restriction on the shift block 17, and the shift block 17 is pulled by the spring 16 to rotate clockwise into the first locking notch of the lock hook 3 to achieve primary locking; then the handle of the handle 6 is pressed down to drive the lock hook 3 to continue to rotate clockwise, so that the groove opening of the lock hook 3 turns from one side of the lock block to the other side of the lock block to limit the lock block. At the same time, the spring 16 recovers, and the shift block 17 slides out of the first locking notch of the lock hook 3 and enters the second locking notch to achieve secondary locking. The fourth branch of the handle 6 drives the shaft 8 to rotate around the rotating seat 9, and the shaft 8 slides upward along the rotating seat 9. The pin shaft 11 turns to the side of the reference line B away from the pull rod 5, and the spring 10 is not under pressure; finally, the stop block and the stop bracket 7 are connected with a safety pin (not shown) to complete the locking operation. The spring 10 and the reference line B provide pre-tightening pressure for the lock hook 3 through the handle 6, and the pull rod 5 amplifies the pre-tightening pressure, and cooperates with the two-stage locking position to prevent locking failure and improve reliability.

[0030] When unlocking, remove the safety pin, lift the handle 6, the handle 6 rotates counterclockwise around the rotating shaft 13, the pull rod 5 slides along the arc groove, and cannot drive the lock hook 3 to rotate. The fifth branch pulls down the shift block 17 through the connecting piece 12, so that the first branch of the shift block 17 leaves the bottom notch of the lock hook 3, and the restriction of the lock hook 3 is released. After the restriction is released, the pull rod 5 is located at the bottom end of the arc groove and can move upward with the handle 6, thereby pushing the lock hook 3 to rotate counterclockwise and releasing the lock block from the groove opening. When fully unlocked, the fourth branch drives the shaft 8 to rotate around the rotating seat 9 and slides downward along the rotating seat 9, compressing the spring 10, so that the pin shaft 11 turns to the side of the reference line B close to the pull rod 5, and applies a counterclockwise torque to the handle 6, the handle 6 remains in the lifted state, and the locking area of ​​the lock hook 3 is fixed and does not rotate.

Claims

1. An emergency evacuation door locking device, comprising a rotatably connected lock hook (3) and a shift block (17), wherein the side wall of the lock hook (3) is provided with a locking area, a first locking notch, and a second locking notch, characterized in that: The lock hook (3) is connected to a pull rod (5), and the shift block (17) is connected to a first spring (16). When locking, the pull rod (5) drives the lock hook (3) to rotate, and the shift block (17) is driven by the first spring (16) to snap into the second locking notch.

2. The emergency door locking device according to claim 1, characterized in that: The invention also comprises a handle (6), wherein the handle (6) has a rotating shaft (13) for supporting the handle to rotate, and the handles on both sides of the rotating shaft (13) are respectively connected to the pull rod (5) and the shift block (17). When unlocking, the handle (6) drives the lock hook (3) and the shift block (17) to rotate, and the shift block rotates in the same direction as the lock hook.

3. The emergency door locking device according to claim 2, characterized in that: The handle (6) is provided with an arc groove, and the pull rod (5) is connected to the arc groove of the handle (6) via a first pin shaft.

4. The emergency door locking device according to claim 2, characterized in that: The handle (6) is connected to a first safety mechanism, and after unlocking, the first safety structure prevents the handle (6) from rotating.

5. The emergency door locking device according to claim 4, characterized in that: The first safety mechanism comprises a shaft (8) and a rotating seat (9), wherein the rotating seat (9) is located on a side of the handle (6) away from the lock hook (3), the shaft (8) is sleeved in the rotating seat (9), the handle (6) is hinged to the shaft (8) through a second pin shaft (11), a second spring (10) is provided on the shaft (8) between the second pin shaft (11) and the rotating seat (9), and a connecting line between the center of the rotating shaft (13) and the center of rotation of the rotating seat (9) is taken as a first reference line. When unlocking and locking, the second pin shaft (11) is respectively located on both sides of the first reference line.

6. The emergency door locking device according to claim 5, characterized in that: The second pin shaft (11) and the shift block (17) are simultaneously connected to the handle on the same side of the rotating shaft (13), and the handles (6) on both sides of the rotating shaft (13) are bent toward the rotating seat (9). When unlocking, the second pin shaft (11) is located on the side of the first reference line close to the pull rod (5), and the second spring (10) is compressed.

7. The emergency door locking device according to claim 6, characterized in that: A branch for connecting a shifting block (17) extends from the handle between the second pin shaft (11) and the rotating shaft (13).

8. The emergency door locking device according to claim 3, characterized in that: The locking hook (3) and the pull rod (5) are connected via a third pin shaft (4), with the center of the mounting shaft (2) supporting the rotation of the locking hook (3) and the connecting line of the center of the first pin shaft being the second reference line. When unlocking and locking, the third pin shaft (4) is located on the same side of the second reference line.

9. The emergency door locking device according to claim 2, characterized in that: A second safety mechanism is provided on the side of the handle, and the second safety mechanism comprises a stop block connected to the handle and a stop bracket (7) used to be connected to the vehicle body. When locked, the stop block and the stop bracket (7) are at the same height, and the stop block and the stop bracket (7) are connected via a latch.

10. The emergency door locking device according to claim 2, characterized in that: The handles (6) on both sides of the arc-shaped groove are bent.

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