Simple self-locking device for stair safety door

Abstract

The utility model relates to the technical field of safety door devices, in particular to a simple self-locking device for a stair safety door, which comprises a stair body, a first stair vertical rod is mounted on the stair body, two hinges are mounted on the first stair vertical rod, a safety door is fixedly connected onto the two hinges, and a second stair vertical rod is mounted on the first stair vertical rod. A reset mechanism used for driving the safety door to reset is arranged between the first stair vertical rod and the safety door, a second stair vertical rod is fixedly connected to the stair body, and a self-locking mechanism used for locking the safety door after the safety door is reset is arranged on the second stair vertical rod. The technical problem that an existing safety door is not convenient and fast to open and close is solved.

Description

Technical Field

[0001] This utility model relates to the field of safety door device technology, and specifically discloses a simple self-locking device for stair safety doors. Background Technology

[0002] In industrial and mining production environments, various types of staircases are widely distributed, especially in areas such as inclined material conveying corridors. To ensure the safety of workers and prevent them from accidentally falling while going up and down stairs, installing safety doors at stairwell entrances and in the middle of long staircases has become an important measure to meet inherent safety requirements. The purpose of setting up safety doors is to build a protective barrier, effectively reduce the risk of personnel falling, and ensure the safety of personnel during production operations.

[0003] For example, utility model patent CN208441702U discloses a safety door for construction projects, including a door frame. A door leaf is rotatably connected to one side of the door frame via a hinge. A door lock mechanism is fixedly connected to the middle of the side of the door leaf away from the hinge. A steel plate is fixedly connected between the bottom of the door leaf and the bottom of the door lock mechanism. A steel rod is fixedly connected between the top of the steel plate and the top of the door leaf. A crossbar is fixedly connected to the outside of the door frame. A pin is fixedly connected to the bottom of the crossbar, and a fixing plate is sleeved in the middle of the pin. This utility model relates to the technical field of safety protection equipment for construction projects. This safety door device for construction projects achieves the purpose of improving the safety of the door body, ensuring the safety of construction personnel. Furthermore, through a shock-absorbing device, it can reduce the impact between the door leaf and the door frame, reducing construction noise. Simultaneously, the fixing plate and bolts make the disassembly of the safety door more convenient.

[0004] Existing self-locking devices only solve the problem of easy disassembly of security doors. However, the mechanism of the self-locking device on the security door itself is relatively complex. Traditional security doors use bolts or locks to lock. When personnel need to pass through, they need to pull out the bolt or find the key to unlock it. Due to the inconvenience, they are often abandoned, resulting in the loss of their safety function. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a simple self-locking device for stair safety doors to solve the technical problem that existing safety doors are not convenient to open and close.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a staircase body, on which a first staircase upright is installed. Two hinges are installed on the first staircase upright, and a safety door is fixedly connected to each of the two hinges. A reset mechanism for resetting the safety door is provided between the first staircase upright and the safety door. A second staircase upright is fixedly connected to the staircase body, and a self-locking mechanism for locking the safety door after it has been reset is provided on the second staircase upright. After the safety door is opened, it is automatically reset by the reset mechanism, eliminating the need for manual reset. After resetting, the safety door is locked by the self-locking mechanism to prevent accidental opening when no one is operating it, thereby ensuring personnel safety and preventing pedestrians from falling due to accidental opening of the safety door.

[0007] Furthermore, the reset mechanism includes a tension spring, which is installed between the staircase body and the safety door. The use of a tension spring in the reset mechanism, installed between the staircase body and the safety door, ensures that the safety door can automatically close after use without manual intervention. The tension spring has a simple structure, is easy to install and maintain, reducing production costs and maintenance difficulty. In addition, the tension spring has high reliability, is not prone to failure, and can operate stably for a long time. In contrast, existing locking devices typically require multiple sets of linkage components, such as connecting rods and electromagnetic components, which not only increases the complexity of installation and debugging but also makes the overall reliability susceptible to wear or failure of components.

[0008] Furthermore, the self-locking mechanism includes a self-locking baffle, which is fixedly connected to the safety door. A base plate is installed on the second stair upright, and a first rotating shaft is installed on the base plate. A rotatable bushing is installed on the first rotating shaft, and a self-locking lever that can limit the self-locking baffle is fixedly connected to the bushing. A counterweight is installed at the end of the self-locking lever away from the self-locking baffle. A magnetic limiting device that can limit the self-locking lever is provided on the base plate. An inner door opening device for lifting the self-locking lever inside the stair body is provided on the second stair upright. The combination of the self-locking lever and the self-locking baffle enables the automatic locking and unlocking of the safety door. When the safety door is closed, the self-locking lever, under the action of the counterweight and the magnetic limit device, automatically limits the self-locking baffle to ensure that the safety door will not be opened accidentally. When it is necessary to open the safety door, the limit can be easily released by simply lifting the self-locking lever. This self-locking mechanism has a simple structure, is easy to operate, has low cost, and high reliability. Compared with the existing complex and faulty locking devices, it has obvious advantages.

[0009] Furthermore, the magnetic limiting device includes a fixed frame, within which a return spring is installed. A magnet, capable of magnetically attracting the self-locking lever, is mounted on the return spring. An arc-shaped plate, capable of contacting the self-locking baffle, is mounted on the magnet. The cooperation between the magnet and the self-locking lever enables automatic limiting and unlocking of the self-locking lever. When the safety door is closed, the self-locking baffle on the safety door pushes the arc-shaped plate to release the magnetic attraction of the magnet to the self-locking baffle, allowing the self-locking baffle to re-limit and fix itself. When the safety door needs to be opened, simply lift the self-locking lever, allowing it to attract to the magnet, easily releasing the limit. This magnetic limiting device is simple in design, easy to operate, and has stable and reliable performance. Compared to traditional limiting devices with complex structures and high failure rates, it has significant advantages. It cleverly utilizes the interaction between the magnet and the self-locking lever, simplifying the limiting and unlocking operation process and improving the stability and service life of the device.

[0010] Furthermore, the inner door opening device includes a second rotating shaft with a rotatable top rod mounted on it. The top rod can lift the self-locking lever from the inside of the staircase body, causing it to attract a magnet, thus enabling convenient opening of the safety door. This inner door opening device has a simple structure and is easy to operate; unlocking is achieved simply by pushing the top rod, without the need for complex procedures or additional tools. Compared to traditional door opening devices, this device reduces the number of parts and operating steps, providing a more efficient and safer solution for opening safety doors from the inside of the staircase body.

[0011] Furthermore, the inner door opening device also includes a handle, which is fixedly connected to the top rod. The handle allows for convenient application of force, increases the grip area, and improves operational comfort and convenience.

[0012] The working principle and beneficial effects of this solution are as follows:

[0013] When staff need to open the safety door to enter the staircase, they simply lift the end of the self-locking lever near the counterweight with one hand to release the self-locking baffle. Because the self-locking lever is made of ferromagnetic material, it is attracted to the magnet on the return spring, bringing the lever to a horizontal position. At this point, the self-locking baffle on the safety door slides into contact with the curved plate on the magnet, limiting its movement. As the safety door rotates, the limitation on the curved plate on the magnet is released, and the return spring releases its elastic potential energy, pushing the magnet upwards. The self-locking lever rises accordingly. Because the total height of the magnet and the curved plate is less than the lowest working height of the self-locking lever, it does not interfere with the rotation of the safety door, allowing staff to... Pull the safety door directly. After the safety door opens, the hinge flips and stretches the tension spring. When the opening angle is sufficient, the worker supports and fixes the safety door to enter the staircase. After entering, the safety door resets under the action of the tension spring. During the movement of the self-locking baffle, it misaligns with the self-locking lever. Its L-shaped fold pushes the arc plate down, and the magnet disengages from the magnetic attraction range of the self-locking lever. The counterweight makes the self-locking lever tighten against the self-locking baffle to complete the limit. When opening the door from the inside of the staircase, push the operating handle down, and the top rod rotates to abut against the self-locking lever, lifting it to the position where the magnet is attracted, releasing the limit, and then you can push the safety door open. This device effectively solves the technical problem of the safety door not being convenient to open and close.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0016] Figure 2 This is a schematic diagram of the reset mechanism structure in an embodiment;

[0017] Figure 3 This is a schematic diagram of the self-locking mechanism in an embodiment;

[0018] Figure 4 Example Figure 3 A magnified view of a section at point A in the middle;

[0019] Figure 5 This is an exploded view of the magnetic attraction limiting device in an embodiment.

[0020] The following are the markings in the attached diagram: 1. Staircase body; 2. First staircase upright; 3. Hinge; 4. Safety door; 5. Second staircase upright; 6. First fixed shaft; 7. Second fixed shaft; 8. Tension spring; 9. Self-locking baffle; 10. Base plate; 11. Two mounting plates; 12. First rotating shaft; 13. Bushing; 14. Self-locking lever; 15. Counterweight; 16. Fixing frame; 17. Return spring; 18. Magnet; 19. Curved plate; 20. Second rotating shaft; 21. Top rod; 22. Handle. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method:

[0022] Example 1

[0023] like Figures 1 to 4 As shown, a simple self-locking device for a staircase safety door is disclosed, including a staircase body 1, a first staircase upright 2, two hinges 3, a safety door 4, a reset mechanism, a second staircase upright 5, and a self-locking mechanism. The first staircase upright 2 is fixedly connected to the staircase body 1. Two hinges 3 are installed on the first staircase upright 2, and the safety door 4 is fixedly connected to the two hinges 3. A reset mechanism is provided between the first staircase upright 2 and the safety door 4, which is used to reset the safety door 4. The second staircase upright 5 is fixedly connected to the side of the staircase body 1 away from the first staircase upright 2. The second staircase upright 5 is provided with a self-locking mechanism. After the safety door 4 is reset by the reset mechanism, it is locked by the self-locking mechanism. Figure 1 As shown.

[0024] The reset mechanism includes a first fixed shaft 6, a second fixed shaft 7, and a tension spring 8. The first fixed shaft 6 is fixedly connected to the stair body 1, and the second fixed shaft 7 is fixedly connected to the safety door 4. A tension spring 8 is installed between the first fixed shaft 6 and the second fixed shaft 7. Figure 2 As shown.

[0025] The self-locking mechanism includes a self-locking baffle 9, a base plate 10, two mounting plates 11, a first rotating shaft 12, a bushing 13, and a self-locking lever 14. The self-locking baffle 9, which is L-shaped, is fixedly connected to the side of the safety door 4 closest to the second stair upright 5. The base plate 10 is fixedly connected to the side of the second stair upright 5 closest to the self-locking baffle 9. Two mounting plates 11 are mounted on the base plate 10, and a first rotating shaft 12 is installed between the two mounting plates 11. A bushing 13 is mounted on the first rotating shaft 12 and is rotatably connected to it. A self-locking lever 14 is fixedly connected to the bushing 13, and the self-locking lever 14 can limit the movement of the self-locking baffle 9. Figure 3 and Figure 4 As shown.

[0026] In practice

[0027] When staff need to open safety door 4 to enter the staircase body 1, there are two mounting plates 11 fixed on the base plate 10, a first rotating shaft 12 between the two mounting plates 11, a bushing 13 rotatably connected to the rotating shaft, and a self-locking lever 14 fixedly connected to the bushing 13. First, the staff only needs to lift the end of the self-locking lever 14 away from the second staircase upright 5 with one hand, so that the self-locking lever 14 stops limiting the self-locking baffle 9. Safety door 4 rotates through two hinges 3 on the first staircase upright 2. When safety door 4 is flipped, it will stretch the tension spring 8 between the first fixed shaft 6 and the second fixed shaft 7. After safety door 4 is opened, staff can directly enter the staircase body 1.

[0028] After the staff enters the staircase body 1, the safety door 4 is reset by the tension spring 8. At this time, the self-locking lever 14 re-locks the self-locking baffle 9 on the safety door 4. When it is opened again, the staff can directly lift the side of the self-locking lever 14 away from the second staircase upright 5. The side of the self-locking lever 14 close to the second staircase upright 5 tilts towards the side close to the bottom plate 10. When it is lower than the height of the self-locking baffle 9, the safety door 4 can be pushed open directly.

[0029] Example 2

[0030] like Figures 1 to 5 As shown, a simple self-locking device for a staircase safety door is disclosed, including a staircase body 1, a first staircase upright 2, two hinges 3, a safety door 4, a reset mechanism, a second staircase upright 5, and a self-locking mechanism. The first staircase upright 2 is fixedly connected to the staircase body 1. Two hinges 3 are installed on the first staircase upright 2, and the safety door 4 is fixedly connected to the two hinges 3. A reset mechanism is provided between the first staircase upright 2 and the safety door 4, which is used to reset the safety door 4. The second staircase upright 5 is fixedly connected to the side of the staircase body 1 away from the first staircase upright 2. The second staircase upright 5 is provided with a self-locking mechanism. After the safety door 4 is reset by the reset mechanism, it is locked by the self-locking mechanism. Figure 1 As shown.

[0031] The reset mechanism includes a first fixed shaft 6, a second fixed shaft 7, and a tension spring 8. The first fixed shaft 6 is fixedly connected to the stair body 1, and the second fixed shaft 7 is fixedly connected to the safety door 4. A tension spring 8 is installed between the first fixed shaft 6 and the second fixed shaft 7. Figure 2 As shown.

[0032] The self-locking mechanism includes a self-locking baffle 9, a base plate 10, two mounting plates 11, a first rotating shaft 12, a bushing 13, a self-locking lever 14, a counterweight 15, a magnetic limit device, and an inner door opening device. The safety door 4 is fixedly connected to the self-locking baffle 9 on the side near the second stair upright 5. The self-locking baffle 9 is L-shaped. The second stair upright 5 is fixedly connected to the base plate 10 on the side near the self-locking baffle 9. Two mounting plates 11 are installed on the base plate 10. A first rotating shaft 12 is installed between the two mounting plates 11. A bushing 13 is installed on the first rotating shaft 12. 13 is rotatably connected to the first rotating shaft 12. A self-locking lever 14 is fixedly connected to the bushing 13. The self-locking lever 14 can limit the self-locking baffle 9. The self-locking lever 14 is made of ferromagnetic material and can attract the magnetic limiting device. A counterweight 15 is fixedly connected to the end of the self-locking lever 14 away from the self-locking baffle 9. A magnetic limiting device is provided on the base plate 10. The magnetic limiting device can limit and fix the self-locking lever 14. An inner opening device is provided on the second stair upright 5. The inner opening device can lift the self-locking lever 14 from the inside. Figure 3 and Figure 4 As shown.

[0033] The magnetic attraction limiting device includes a fixed frame 16, a return spring 17, a magnet 18, and an arc-shaped plate 19. The fixed frame 16 is fixedly connected to the base plate 10. The return spring 17 is installed inside the fixed frame 16. A magnet 18 is fixedly connected to one end of the return spring 17 away from the bottom surface of the fixed frame 16. The magnet 18 slides axially along the fixed frame 16 under the action of the return spring 17, and can magnetically attract the self-locking lever 14. The total height of the magnet 18 and the arc-shaped plate 19 is less than the lowest working height of the self-locking lever 14. The arc-shaped plate 19 is fixedly connected to the magnet 18 by bolts, and the arc-shaped plate 19 slides in contact with the bottom of the self-locking baffle 9. Figure 4 and Figure 5 As shown.

[0034] The inner door opening device includes a second pivot 20, a top rod 21, and a handle 22. The second pivot 20 is fixedly connected to the second stair upright 5, and the top rod 21 is rotatably connected to the second pivot 20. The end of the top rod 21 near the self-locking lever 14 is heavier than the end near the second stair upright 5. The handle 22 is fixedly connected to the end of the top rod 21 near the second stair upright 5. Figure 4 As shown.

[0035] In practice

[0036] When staff need to open safety door 4 to enter the staircase body 1, two mounting plates 11 are fixed on the base plate 10, and a first rotating shaft 12 is set between the two mounting plates 11. A bushing 13 is rotatably connected to the rotating shaft, and a self-locking lever 14 is fixedly connected to the bushing 13. First, the staff only needs to lift the end of the self-locking lever 14 near the counterweight 15 with one hand to end the self-locking lever 14's limitation on the self-locking baffle 9. When the self-locking lever 14 is lifted, since the self-locking lever 14 is made of ferromagnetic material, it is attracted by the magnet 18 on the return spring 17. After the self-locking lever 14 is attracted by the magnet 18, it is in a horizontal position. In the current state, when the safety door 4 is limited by the self-locking lever 14, the self-locking baffle 9 on the safety door 4 slides into contact with the arc plate 19 on the magnet 18, limiting the arc plate 19. During the flipping process, the safety door 4 will stop limiting the arc plate 19 on the magnet 18. At this time, the compressed return spring 17 will release its elastic potential energy, pushing the magnet 18 to move upward. At this time, the self-locking lever 14, which is attracted and fixed, will also rise to a certain height. Since the total height of the magnet 18 and the arc plate 19 is less than the lowest working position height of the self-locking lever 14, the self-locking lever 14 will not interfere with the normal flipping of the safety door 4. At this time, the staff can directly pull the safety door 4.

[0037] After the self-locking lever 14 is attracted by the magnet 18, the safety door 4 is flipped by the two hinges 3 on the first stair upright 2. During the flipping process, the safety door 4 will stretch the tension spring 8 between the first fixed shaft 6 and the second fixed shaft 7. When the opening angle of the safety door 4 is sufficient to allow the staff to enter the stair body 1, the staff will support and fix the safety door 4 by hand and then enter the stair body 1. After the staff enters the stair body 1, the support and fixation of the safety door 4 will be stopped. At this time, the safety door 4 will be reset by the tension spring 8 that was previously stretched.

[0038] When the safety door 4 is reset, its self-locking baffle 9 moves along a closed trajectory. First, it passes through the self-locking lever 14, which is in a horizontal adsorption state. Then, the L-shaped fold of the self-locking baffle 9 pushes the arc plate 19 down, triggering the magnet 18 to disengage from the self-locking lever 14. At this time, the arc plate 19 will push the magnet 18 to move, and the magnet 18 will slide within the fixed frame 16. At the same time, it will also compress the reset spring 17. The magnet 18 slides along the fixed frame 16 until it is out of the magnetic attraction range of the self-locking lever 14. At this time, the gravity of the counterweight 15 causes the self-locking lever 14 to quickly disengage from the magnet 18 and re-tighten the self-locking baffle 9. At this time, the self-locking baffle 9 on the safety door 4 will be limited and fixed by the self-locking lever 14.

[0039] When it is necessary to open the safety door 4 from the inside of the staircase body 1, when the operating handle 22 is pushed down, the top rod 21 rotates around the second pivot 20, and its far end abuts against the end of the self-locking lever 14 near the counterweight 15, raising the self-locking lever 14 to the position where the magnet 18 is attracted, releasing the restriction on the self-locking baffle 9, and the staff can push the safety door 4 open from the inside of the staircase body 1.

[0040] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A simple self-locking device for a stairwell safety door, characterized in that: The staircase includes a staircase body, on which a first staircase upright is installed. Two hinges are installed on the first staircase upright, and safety doors are fixedly connected to the two hinges. A reset mechanism for driving the safety doors to reset is provided between the first staircase upright and the safety doors. A second staircase upright is fixedly connected to the staircase body, and a self-locking mechanism for locking the safety doors after they have been reset is provided on the second staircase upright.

2. The simple self-locking device for a stairwell safety door according to claim 1, characterized in that: The reset mechanism includes a tension spring, which is installed between the staircase body and the safety door.

3. The simple self-locking device for a stairwell safety door according to claim 1, characterized in that: The self-locking mechanism includes a self-locking baffle, which is fixedly connected to the safety door. A base plate is installed on the second stair upright, and a first rotating shaft is installed on the base plate. A rotatable bushing is installed on the first rotating shaft, and a self-locking lever that can limit the self-locking baffle is fixedly connected to the bushing. A counterweight is installed at the end of the self-locking lever away from the self-locking baffle. A magnetic limiting device that can limit the self-locking lever is provided on the base plate. An inner door opening device is provided on the second stair upright for lifting the self-locking lever inside the stair body.

4. A simple self-locking device for a stairwell safety door according to claim 3, characterized in that: The magnetic attraction limiting device includes a fixed frame, a return spring is installed inside the fixed frame, a magnet is installed on the return spring that can magnetically attract the self-locking lever, and an arc-shaped plate is installed on the magnet that can contact the self-locking baffle.

5. A simple self-locking device for a stairwell safety door according to claim 3, characterized in that: The inner door opening device includes a second rotating shaft, on which a rotatable top rod is provided.

6. A simple self-locking device for a stairwell safety door according to claim 5, characterized in that: The inner door opening device also includes a handle, which is fixedly connected to the top rod.

Images