A kind of anti-moving and anti-falling locking device for door leaf of civil air defense door

Abstract

The utility model relates to the technical field of civil air defence door locking, and disclose a civil air defence door door leaf anti -moving anti -falling locking device to solve the shortcoming that the prior art is not easy to automatically lock the civil air defence door after opening, the utility model discloses through gravity sliding member and the automatic cooperation of positioning piece, and the door leaf opens to the locking position, and the lock head can automatically fall into the locking ring, effectively blocks the left and right movement of door leaf, plays safe positioning effect, the support piece is extruded butt joint groove through the screw rod screwing of support rod, and the position of lock head is reinforced, provides additional support for the outer end of door leaf simultaneously with the cooperation of positioning piece, avoids the deviation of door leaf because of gravity falling for long -term opening, and guarantees the smooth opening and closing, the articulated seat uses steel ball and cage to reduce the rotating friction, improves the opening and closing flexibility, and the door frame is stably connected with the wall through the opposite pull bolt. The overall scheme gives consideration to locking reliability, support stability and operation convenience, satisfies the anti -moving anti -falling of civil air defence door, air tightness and long -term use stability demand.

Description

Technical Field

[0001] This utility model relates to the field of air defense door locking technology, and in particular to an anti-slip and anti-fall locking device for air defense door panels. Background Technology

[0002] As a key protective component in protective engineering, air-raid shelter doors are widely used in underground garages, subway stations, air-raid shelters, and other places. When open, they need to maintain a stable position for a long time to ensure unobstructed passage and safe passage for personnel.

[0003] Existing technologies mostly employ simple pin-type locking or ordinary bolt fixing structures to lock the air-raid shelter door after it is opened: Pin-type locking requires manual insertion and removal, which is not only inconvenient, but also has a large gap between the pin and the lock hole, making it unable to effectively resist the door leaf movement caused by piston wind; Although ordinary bolt fixing can enhance the locking stability, it requires repeated turning with tools, which is cumbersome, and it can only achieve the locking function, without providing additional support for the outer end of the door leaf, and it is still difficult to avoid the problem of the door leaf sagging after being opened for a long time. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of not being able to automatically lock the air defense door after it is opened. To this end, we propose an anti-slip and anti-fall locking device for air defense door panels.

[0005] To achieve the above objectives, this application adopts the following technical solution: a locking device for preventing the movement and falling of a civil defense door leaf, comprising a locking assembly fixed to the bottom inner side of the door leaf body. The locking assembly consists of a support member, a gravity sliding member, and a positioning member. The support member and the gravity sliding member are coaxially and collinearly distributed on the door leaf body. The positioning member is fixed to the ground. After the door leaf body is opened to the locked position, the gravity sliding member is located directly above the positioning member. The gravity sliding member includes a lower support fixed to the inner side of the door leaf body. A lock head slides longitudinally inside the lower support. A guide hole is provided on the side of the lower support away from the door leaf body. A guide handle is slidably installed inside the guide hole. The inner end of the guide handle is fixedly connected to the middle of the lower support. A chamfered surface is provided on the bottom side of the lock head away from the door leaf body. The positioning member includes a positioning seat fixed to the bottom. An inclined guide block is fixed to the top of the positioning seat near the opening side of the door leaf body. A locking ring is connected to the side of the inclined guide block away from the inclined surface. The bottom end of the locking ring is fixedly connected to the top end of the positioning seat.

[0006] Preferably, the support includes an upper support fixed to the inside of the door body, a screw rod passing through the internal thread of the upper support, a support rod fixed to the bottom end of the screw rod, a handwheel fixed to the top end of the screw rod, and a mating groove opened at the top end of the lock head directly below the support rod.

[0007] Preferably, the outer diameter of the support rod is matched with the inner diameter of the mating groove, and a buffer pad is provided at the bottom end of the support rod.

[0008] Preferably, a handle is installed on the door leaf body, and two vertically distributed hinge seats are installed on the side of the door leaf body away from the locking component. The hinge seats are fixed to the wall, and the door leaf body is rotated to open along the axial direction of the hinge seats. The hinge seats include hinge plate seats installed on the wall surface, and two vertically distributed hinge plates are fixed on the hinge plate seats. A connecting shaft passes through between the upper and lower hinge plates, and a hinge lug is sleeved on the outside of the connecting shaft. One side of the hinge lug is fixedly connected to the side wall of the door leaf body.

[0009] Preferably, a pin is inserted laterally at the bottom end of the upper connecting shaft, a locking nut is fitted at the bottom end of the lower pin, and a retainer is fixed to the top surface of the hinge plate at the bottom of the lower hinge seat. The retainer surrounds the outside of the connecting shaft, and steel balls are evenly embedded inside the retainer. The top of the steel balls abuts against the bottom end of the hinge lug.

[0010] Preferably, a door frame is provided on the outer side of the door leaf body. The door frame is fixedly connected to the wall by tie bolts. The tie bolts pass through the side edge of the door frame and the inner end of the tie bolts passes through the pre-embedded sleeve located in the wall. A rubber pad and a T-nut are sequentially fitted on the end of the tie bolt away from the door frame. The end face of the T-nut is flush with the wall.

[0011] The technical effects and advantages of this utility model are as follows: In this utility model, through the automatic cooperation of the gravity sliding component and the positioning component, the lock head can automatically fall into the locking ring after the door leaf is opened to the locking position, effectively preventing the door leaf from moving forward and backward; the support component, through the screw screwing, causes the support rod to press against the docking groove, further reinforcing the position of the lock head, and at the same time, cooperates with the positioning component to provide additional support for the outer end of the door leaf, preventing the door leaf from shifting due to gravity after long-term opening, and ensuring smooth opening and closing in the future; the hinge seat reduces the door leaf rotation friction through steel balls and retainers, improving the flexibility of opening and closing, and the tie bolt connection between the door frame and the wall ensures stable installation. The overall solution takes into account the reliability of locking, the stability of support and the convenience of operation, meeting the requirements of air-raid shelter doors for anti-slip and anti-fall, airtightness and long-term stability. Attached Figure Description

[0012] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the front view of the present invention. Figure 2 This is a side sectional view of the locking component of this utility model in the activated state. Figure 3 This is a side sectional view of the locking component of this utility model in the locked state. Figure 4 This is a schematic diagram of the main plan view of the upper hinge seat of this utility model; Figure 5 This is a schematic diagram of the main plan view of the lower hinge seat of this utility model; Figure 6 This is a top view schematic diagram of the hinge seat structure of this utility model; Figure 7 This is a top-section plan view of the pre-embedded sleeve of this utility model.

[0013] Legend: 1. Door leaf body; 2. Hinge seat; 21. Hinge plate; 22. Hinge plate; 23. Hinge lug; 24. Connecting shaft; 241. Pin; 242. Locking nut; 243. Cage; 244. Steel ball; 3. Handle; 4. Door frame; 5. Locking assembly; 51. Support; 511. Upper support; 512. Screw; 513. Handwheel; 514. Support rod; 515. Connecting groove; 52. Gravity sliding component; 521. Lower support; 522. Lock head; 523. Guide handle; 524. Guide hole; 525. Chamfered surface; 53. Positioning component; 531. Positioning seat; 532. Locking ring; 533. Angled guide block; 6. Embedded sleeve; 61. Tie bolt; 62. Rubber pad; 63. T-nut. Detailed Implementation

[0014] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0015] Reference Figures 1-3As shown, this utility model provides a technical solution: a locking device for preventing displacement and falling of a civil defense door leaf, including a locking component 5 fixed to the bottom inner side of the door leaf body 1. The locking component 5 is fixed to the inner wall of the door leaf body 1 by bolt connection to ensure no relative displacement during the opening and closing of the door leaf. Its overall installation position corresponds to the locking position after the door leaf is opened, so that the gravity sliding component 52 can accurately align with the positioning component 53. The locking component 5 consists of a support component 51, a gravity sliding component 52, and a positioning component 53. The support component 51 is tightly fitted and fixed to the inner wall of the door leaf body 1. The installation height is higher than that of the gravity sliding member 52, and the two are coaxially and collinearly distributed to ensure that the support rod 514 can be accurately aligned with the docking groove 515. The gravity sliding member 52 is fixed to the inner wall of the door body 1 through the lower support 521. The contact surface between the lower support 521 and the door body 1 is polished to ensure a tight connection without gaps. The positioning member 53 is fixed to the ground by expansion bolts or pre-embedded method. Its installation position corresponds to the locking position after the door body 1 is opened, so that when the door body 1 is opened to this position, the gravity sliding member 52 is exactly above the positioning member 53. The gravity sliding component 52 includes a lower support 521 fixed to the inner side of the door body 1. The lower support 521 is detachably connected to the door body 1 by bolts for easy maintenance and replacement. A sliding cavity is longitudinally formed inside the lower support 521, and the lock head 522 can slide up and down along the sliding cavity. The inner wall of the sliding cavity is smoothed to reduce the frictional resistance when the lock head 522 slides. A guide hole 524 is formed on the side of the lower support 521 away from the door body 1. The guide hole 524 communicates with the sliding cavity. A guide handle 523 is slidably installed inside the guide hole 524. Its outer end extends to the outside of the lower support 521 for easy operation, and its inner end is fixed to the middle of the lower support 521 by welding or threaded connection to ensure that pulling the guide handle 523 can simultaneously move the lock head 522 inside the lower support 521. The bottom of the lock head 522 has a chamfered surface 525 on the side away from the door body 1. The chamfered surface 525 is polished to facilitate its contact and guidance with the inclined surface of the inclined guide block 533. The positioning component 53 includes a positioning seat 531 fixed at the bottom. The contact surface of the positioning seat 531 with the ground is coated with sealant to enhance airtightness and connection stability. The inclined guide block 533 is welded to the top of the positioning seat 531 near the opening side of the door body 1. The inclined surface of the inclined guide block 533 faces the opening direction of the door to ensure that the lock head 522 can smoothly contact and rise along the inclined surface. A locking ring 532 is connected to the side of the inclined guide block 533 away from the inclined surface. The locking ring 532 has a ring structure. Its bottom end is fixedly connected to the top end of the positioning seat 531 by welding. The connection is reinforced to prevent breakage due to long-term stress.

[0016] The inclined surface of the guide block 533 guides the bottom end of the lock head 522. When the door body 1 is opened to the locked position, the lock head 522 can automatically rise and fall into the locking ring 532 due to gravity after disengaging from the guide block 533, thus effectively preventing the door body 1 from shifting back and forth. At the same time, the downward screw thread of the screw 512 causes the support rod 514 to exert a downward squeezing force on the mating groove 515, further promoting the stability of the lock head 522 and ensuring the reliability of the lock. Meanwhile, the close connection between the positioning seat 531, the lock head 522, the screw 512 and the door body 1 effectively provides additional support to the outer end of the door body 1, reducing the downward fall of the outer end of the door body 1 due to gravity when it is open for a long time, further improving the smoothness of subsequent opening and closing of the door body 1, and preventing the position of the gravity sliding member 52 and the support member 51 from shifting.

[0017] Reference Figure 3 As shown in this embodiment: the support member 51 includes an upper support 511 fixed inside the door body 1, a screw 512 is threaded through the inner thread of the upper support 511, a support rod 514 is fixed at the bottom end of the screw 512, a handwheel 513 is fixed at the top end of the screw 512, and a mating groove 515 is provided at the top end of the lock head 522 directly below the support rod 514.

[0018] The threaded connection between the upper support 511 and the screw 512 facilitates the adjustment of the position of the screw 512 and improves the connection strength between the screw 512 and the door body 1. This, along with the screw 512, the positioning element 53, and other components, provides better support for the door body 1.

[0019] Reference Figure 3 As shown, the outer diameter of the support rod 514 is matched with the inner diameter of the mating groove 515, and a buffer pad is provided at the bottom end of the support rod 514.

[0020] The deformation properties of the buffer pad are utilized to reduce compression damage at the bottom of the support rod 514 and improve its service life.

[0021] Reference Figure 4 , Figure 5 , Figure 6 As shown, a handle 3 is installed on the door body 1. Two vertically distributed hinge seats 2 are installed on the side of the door body 1 away from the locking component 5. The hinge seats 2 are fixed to the wall. The door body 1 can be rotated to open along the axial direction of the hinge seats 2. The hinge seat 2 includes a hinge plate 21 installed on the wall surface. Two vertically distributed hinge plates 22 are fixed on the hinge plate 21. A connecting shaft 24 passes through between the upper and lower hinge plates 22. A hinge ear 23 is sleeved on the outside of the connecting shaft 24. One side of the hinge ear 23 is fixedly connected to the side wall of the door body 1.

[0022] The hinge seat 2 provides stable support and steering restriction for the door body 1.

[0023] Reference Figure 4 , Figure 5 As shown, a pin 241 is horizontally inserted at the bottom end of the upper connecting shaft 24, and a locking nut 242 is fitted at the bottom end of the lower pin 241. A retainer 243 is fixed on the top surface of the hinge plate 22 at the bottom of the lower hinge seat 2. The retainer 243 surrounds the outside of the connecting shaft 24, and steel balls 244 are evenly embedded inside the retainer 243. The top of the steel balls 244 abuts against the bottom end of the hinge lug 23.

[0024] The pin 241 and the locking nut 242 are used to limit the connection shaft 24. The limiting method and disassembly operation of these two are simple and easy. At the same time, the retainer 243 and the steel ball 244 are used to further reduce the friction when the door body 1 is opened and closed, and improve the smoothness of opening and closing.

[0025] Reference Figure 7 As shown, a door frame 4 is provided on the outer side of the door body 1. The door frame 4 is fixedly connected to the wall by tie bolts 61. The tie bolts 61 pass through the side edge of the door frame 4, and the inner end of the tie bolts 61 passes through the pre-embedded sleeve 6 located in the wall. A rubber pad 62 and a T-nut 63 are sequentially fitted on the end of the tie bolt 61 away from the door frame 4. The end face of the T-nut 63 is flush with the wall.

[0026] By using locking components 5 and support components 51, the difficulty of positioning the formwork during construction is effectively reduced, and the use of positioning components 53 ensures the airtightness requirements of the door body 1 during use.

[0027] Working principle: By pulling the door body 1 open using the handle 3, the door body 1 causes the hinge 23 to rotate around the connecting shaft 24, thus causing the support 51 and the gravity sliding member 52 to move synchronously. At this time, under the action of gravity, the lock head 522 naturally hangs down from the bottom end of the lower support 521. When the door body 1 approaches the locked position, the chamfered surface 525 at the bottom of the lock head 522 contacts the inclined surface of the inclined guide block 533, and under the guidance of the inclined surface, the lock head 522 automatically rises until the door body 1 continues to move to the locked position. At this point, the lock head 522 and the inclined guide block 533 are distributed, causing the lock head 522 to automatically fall under the action of gravity. The door body 1 is locked by rotating the handwheel 513, which causes the screw 512 to move the support rod 514 downward into the mating groove 515. This allows the positioning seat 531 to support the support member 51 via the gravity sliding member 52, thus providing additional support for the door body 1. When it is necessary to close the door body 1, the handwheel 513 is rotated in the opposite direction, and the support rod 514 is moved into the mating groove 515. Then, the guide handle 523 is manually lifted upward along the guide hole 524, causing the chamfered surface 525 to move out of the locking ring 532, thereby closing the door body 1.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A locking device for preventing the movement and falling of a civil defense door leaf, characterized in that, The device includes a locking assembly fixed to the bottom inner side of the door body. The locking assembly consists of a support member, a gravity sliding member, and a positioning member. The support member and the gravity sliding member are coaxially and collinearly distributed on the door body. The positioning member is fixed to the ground. When the door body is opened to the locked position, the gravity sliding member is located directly above the positioning member. The gravity sliding member includes a lower support fixed to the inner side of the door body. A lock head slides longitudinally inside the lower support. A guide hole is provided on the side of the lower support away from the door body. A guide handle is slidably installed inside the guide hole. The inner end of the guide handle is fixedly connected to the middle of the lower support. A chamfered surface is provided on the bottom side of the lock head away from the door body. The positioning member includes a positioning seat fixed to the bottom. An inclined guide block is fixed to the top of the positioning seat near the opening side of the door body. A locking ring is connected to the side of the inclined guide block away from the inclined surface. The bottom end of the locking ring is fixedly connected to the top end of the positioning seat.

2. The anti-slip and anti-fall locking device for the door leaf of a civil defense door according to claim 1, characterized in that: The support includes an upper support fixed to the inside of the door body, with a screw thread running through the internal thread of the upper support. A support rod is fixed to the bottom end of the screw, and a handwheel is fixed to the top end of the screw. A mating groove is provided at the top end of the lock head directly below the support rod.

3. The anti-slip and anti-fall locking device for the air-raid shelter door leaf according to claim 2, characterized in that: The outer diameter of the support rod is adapted to the inner diameter of the mating groove, and a buffer pad is provided at the bottom end of the support rod.

4. The anti-slip and anti-fall locking device for the door leaf of a civil defense door according to claim 1, characterized in that: A handle is installed on the main body of the door leaf. Two vertically distributed hinge seats are installed on the side of the main body of the door leaf away from the locking component. The hinge seats are fixed to the wall. The main body of the door leaf can be rotated to open along the axial direction of the hinge seats. The hinge seat includes a hinge plate mounted on the surface of the wall. Two vertically distributed hinge plates are fixed on the hinge plate. A connecting shaft passes through between the upper and lower hinge plates. A hinge lug is sleeved on the outside of the connecting shaft. One side of the hinge lug is fixedly connected to the side wall of the main body of the door leaf.

5. The anti-slip and anti-fall locking device for the door leaf of a civil defense door according to claim 4, characterized in that: A pin is horizontally inserted at the bottom end of the upper connecting shaft, and a locking nut is fitted at the bottom end of the lower pin. A retainer is fixed to the top surface of the hinge plate at the bottom of the lower hinge seat. The retainer surrounds the outside of the connecting shaft, and steel balls are evenly embedded inside the retainer. The top of the steel balls abuts against the bottom end of the hinge lug.

6. The anti-slip and anti-fall locking device for the door leaf of a civil defense door according to claim 1, characterized in that: A door frame is provided on the outer side of the main body of the door leaf. The door frame is fixedly connected to the wall by tie bolts. The tie bolts pass through the side edge of the door frame and the inner end of the tie bolts passes through the pre-embedded sleeve located in the wall. A rubber pad and a T-shaped nut are sequentially fitted on the end of the tie bolt away from the door frame. The end face of the T-shaped nut is flush with the wall.

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