An automatic lifting threshold guard door

Abstract

The utility model relates to an automatic lifting door sill protection door, the automatic lifting door sill protection door, including door frame and door leaf, the ground recess under door frame is equipped with door sill and lifting device, lifting device includes the fixed beam in the ground recess, the fixed beam top is connected lifting beam through connecting rod, and lifting beam is connected with trigger device through pull rod, trigger device includes the torsional spring pivot in the door frame, and the torsional spring pivot is fixedly connected with trigger plate along its radial direction, and the door frame between trigger plate and door leaf side end is equipped with trigger column and slides, to can realize torsional spring pivot rotation through the door leaf opening and closing, and the torsional spring pivot is fixedly connected with the swing bar in the corresponding door sill position, and the swing bar end is connected with pull rod through connecting rod, and the both rings are connected with both ends of connecting rod, to when the swing bar swings back and forth with torsional spring pivot rotation, can pull rod lifting beam and release lifting beam drop. The automatic lifting door sill protection door, not only setting cost is lower, and avoided the situation of power failure failure.

Description

Technical Field

[0001] This utility model relates to the field of protective doors, and in particular to an automatic lifting threshold protective door. Background Technology

[0002] Radiation protection doors are widely used in modern medical equipment rooms and other important entrances. They provide radiation protection, shield against radiation rays, and protect high-radiation facilities from radiation damage to the surrounding population.

[0003] Side-opening radiation shielding doors mainly consist of a door leaf and a door frame. Due to the risk of radiation leakage from the gaps at the bottom of the door leaf and the ground, a protective threshold is also installed. To avoid obstructing passage, the threshold is designed to be adjustable. Patent 201821090964X discloses a protective airtight door with a movable threshold. Although it achieves threshold adjustment, it requires manual control each time. Manual control is not only cumbersome but also prone to forgetting to operate, leading to radiation leakage or obstruction of passage, making it unsafe. Patent 2025105901360 discloses a shielding door with an automatically adjusting threshold, effectively solving the problems of the aforementioned patents by achieving automatic threshold adjustment with door opening and closing. However, this automatic adjustment relies on a motor and other structures. In practical applications, it requires wiring and is susceptible to structural failure due to power outages. More importantly, the installation cost is high, hindering widespread adoption. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an automatic lifting threshold protection door, which can raise and lower the threshold by opening and closing the door using only a mechanical structure. This not only has a low installation cost, but also avoids failure in the event of a power outage.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: An automatic lifting threshold protection door includes a door frame and a door leaf. A threshold is provided in a ground groove under the door frame. A lead plate is provided in the threshold. A lifting device is provided under the threshold to lift the threshold and protect the gap between the door leaf and the ground. The lifting device includes a fixed beam positioned in a groove in the ground. A lifting beam is connected above the fixed beam by a connecting rod, and the upper end of the connecting rod is inclined upward toward the opening and closing end of the door. Multiple rollers are provided on the top of the lifting beam along its length. Each roller makes rolling contact with the threshold along the length of the threshold. The lifting beam is connected to a triggering device by a pull rod. The triggering device includes a torsion spring shaft mounted on the door frame. A trigger plate is fixedly connected to the torsion spring shaft along its radial direction. A trigger post is slidably mounted on the door frame between the trigger plate and the side end of the door leaf, so that the torsion spring shaft can be rotated sequentially by the opening and closing of the door leaf through the trigger post and the trigger plate. A swing rod is also fixedly connected to the torsion spring shaft at the position corresponding to the threshold. The end of the swing rod is connected to the pull rod through a connecting rod, and the two ends of the connecting rod are respectively connected to the two rings or hinges, so that when the swing rod swings back and forth with the rotation of the torsion spring shaft, the pull rod can be used to pull the lifting beam up and release the lifting beam down.

[0006] Preferably, the tie rod is an L-shaped rod, the horizontal section of the L-shaped rod is connected to the lifting beam, the vertical section of the L-shaped rod extends from the bottom of the door frame and is connected to the connecting rod, and the bottom of the door frame has an movable hole for the vertical section to move.

[0007] Preferably, the threshold is an n-shaped piece fastened to the lifting beam, the lead plate is located inside the threshold on the side near the door leaf, and the height of the threshold is not higher than the depth of the ground groove.

[0008] Preferably, the top of the lifting beam is also fixedly connected to a limiting member whose top is lower than the top of the roller, and the two sides of the limiting member extend outward to a section outside the connecting rod.

[0009] Preferably, a support sleeve for the reciprocating sliding of the trigger post is fixed inside the door frame.

[0010] Preferably, a U-shaped steel component is embedded in the ground to form the ground groove, and the two ends of the U-shaped steel component are sealed.

[0011] Preferably, at least two sets of connecting rods are provided between the fixed beam and the lifting beam along their length.

[0012] Preferably, the roller is fixed to the lifting beam via a mounting base.

[0013] Preferably, the lower end of the door frame extends into the ground; or a limiting plate extending downward into the groove in the ground is provided at the bottom of the door frame corresponding to the threshold.

[0014] The advantages of this utility model using the above-mentioned technical solution are: the automatic lifting threshold safety door, through the cooperation of the threshold, lifting device and triggering device, can achieve threshold lifting by opening and closing the door solely by relying on the mechanical structure, which not only has a low installation cost, but also avoids failure due to power outages, thus improving safety in use. Attached Figure Description

[0015] Figure 1 This is a front view of the present invention in the closed state; Figure 2 for Figure 1A schematic diagram of the partial structure shown in the recessed area of ​​the ground and inside the door frame; Figure 3 for Figure 2 Top view after removing the threshold; Figure 4 for Figure 2 Schematic diagram of the coordinated structure of the lifting device and some triggering devices; Figure 5 for Figure 2 A schematic diagram of the structure adjusted to the open position.

[0016] In the diagram, 1. Door frame, 2. Door leaf, 3. Ground groove, 4. Threshold, 5. Fixed beam, 6. Connecting rod, 7. Lifting beam, 8. Roller, 9. Pull rod, 10. Torsion spring shaft, 11. Trigger plate, 12. Trigger column, 13. Swing rod, 14. Connecting rod, 15. Movable hole, 16. Limiting component, 17. Support sleeve, 18. U-shaped steel component, 19. Mounting base, 20. Limiting plate. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0018] like Figure 1-5 As shown, in this embodiment, the automatic lifting threshold protection door includes a door frame 1 and a door leaf 2. A threshold 4 is provided in the ground groove 3 under the door frame 1. A lead plate is provided in the threshold 4. A lifting device is provided under the threshold 4 to drive the threshold 4 to rise and protect the gap between the door leaf 2 and the ground. The lifting device includes a fixed beam 5 positioned in a ground groove 3. A lifting beam 7 is connected above the fixed beam 5 by a connecting rod 6. The upper end of the connecting rod 6 is inclined upward towards the door opening end so that after the lifting beam 7 is pulled up, it can not only fall onto the fixed beam 5 based on its own weight, but also be easily pulled up again. Since the lifting beam 7 has a displacement along its length in addition to the vertical displacement during the lifting process, and since the threshold only has a vertical displacement, in order to reduce the friction between the two, multiple rollers 8 are set on the top of the lifting beam 7 along its length so that each roller 8 rolls in contact with the threshold 4 along the length of the threshold. The lifting beam 7 is connected to a triggering device through a pull rod 9. The triggering device includes a torsion spring shaft 10 disposed in the door frame 1. The working principle of the torsion spring shaft 10 is that it can be reset after rotating a certain angle under external force. Based on this, a trigger plate 11 is fixedly attached to the torsion spring shaft 10 in its radial direction. A trigger post 12 is slidably disposed on the door frame 1 between the trigger plate 11 and the side end of the door leaf 2. Specifically, the trigger post can be reciprocated stably by being fixedly connected to the inner support sleeve 17 of the door frame, so that the torsion spring shaft 10 can be rotated by the opening and closing of the door leaf 2 in sequence through the trigger post 12 and the trigger plate 11. Specifically, when the door is closed, the side end of the door will squeeze the trigger post 12, which in turn squeezes the trigger plate and drives the torsion spring shaft 10 to rotate a certain angle. When the door is opened, the door leaf releases the control of the trigger post. Under the reset action of the torsion spring shaft, the trigger post will slide a section towards the door leaf to facilitate the next closing control.

[0019] A swing arm 13 is fixedly connected to the torsion spring shaft 10 at the position corresponding to the threshold. The end of the swing arm 13 is connected to the pull rod 9 via a connecting rod 14, and both ends of the connecting rod 14 are connected to the two rings or hinges respectively, so that when the swing arm 13 swings back and forth with the rotation of the torsion spring shaft 10, the pull rod 9 can pull the lifting beam 7 up and release the lifting beam 7 down. Specifically, when closing the door, the rotation of the torsion spring shaft will cause the swing arm to swing away from the threshold, and then pull the lifting beam through the pull rod. Under the action of the connecting rod, the lifting beam rises and lifts the threshold. The lead plate set inside the threshold can block and protect the gap between the door leaf and the ground. When opening the door, the torsion spring shaft returns to its original position and causes the swing arm to swing closer to the threshold, which will release the tension of the connecting rod and the lifting beam. After the tension is released, the lifting beam will fall onto the fixed beam under the action of gravity, and the threshold will fall into the groove in the ground under the action of gravity. Since the lifting beam and the threshold with the lead plate are both heavy, there is no problem with them falling under their own weight.

[0020] In one specific embodiment, the pull rod 9 can be an L-shaped rod. The horizontal section of the L-shaped rod is connected to the lifting beam 7, specifically connected to the hinge shaft connecting the connecting rod and the lifting beam. The vertical section of the L-shaped rod extends from the bottom of the door frame 1 and is connected to the connecting rod 14. The bottom of the door frame 1 has an movable hole 15 for the vertical section to move, so that the pull rod can move left and right with the lifting beam.

[0021] In one specific embodiment, the threshold 4 can be an n-shaped piece fastened to the lifting beam 7. The lead plate is located inside the threshold 4 near the door leaf 2 to achieve better protection. The height of the threshold 4 is not higher than the depth of the ground groove 3 to facilitate the threshold falling completely into the ground groove. To effectively limit the two ends of the threshold, the lower end of the door frame 1 can be extended into the ground so that when the threshold falls to the ground level, the two ends are still between the door frame, thus ensuring that the threshold can be smoothly raised again. Alternatively, a limiting plate 20 extending downward into the ground groove can be provided at the bottom of the door frame 1 corresponding to the threshold 4.

[0022] In one specific embodiment, the top of the lifting beam 7 is also fixedly connected to a limiting member 16 whose top is lower than the top of the roller. The two sides of the limiting member 16 extend outward to a section outside the connecting rod 6. This arrangement can prevent the threshold from being interfered with by the connecting rods on both sides of the lifting beam when it falls, so as to prevent the threshold from getting stuck when the two fall out of sync.

[0023] In one specific embodiment, in order to better protect the lifting structure and reduce the impact of water vapor in the ground, a U-shaped steel part 18 is embedded in the ground to form the ground groove 3, and the two ends of the U-shaped steel part 18 are sealed.

[0024] In one specific embodiment, at least two sets of connecting rods 6 are provided between the fixed beam 5 and the lifting beam 7 along their length direction to achieve more stable lifting of the lifting beam.

[0025] In one specific embodiment, the roller 8 is fixed to the lifting beam 7 via a mounting base 19.

[0026] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0027] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. An automatic lifting threshold safety door, characterized in that, The device includes a door frame and a door leaf. A threshold is provided in a recessed area in the ground under the door frame. A lead plate is provided in the threshold. A lifting device is provided under the threshold to raise the threshold and protect the gap between the door leaf and the ground. The lifting device includes a fixed beam positioned in a groove in the ground. A lifting beam is connected above the fixed beam by a connecting rod, and the upper end of the connecting rod is inclined upward toward the opening and closing end of the door. Multiple rollers are provided on the top of the lifting beam along its length. Each roller makes rolling contact with the threshold along the length of the threshold. The lifting beam is connected to a triggering device by a pull rod. The triggering device includes a torsion spring shaft mounted on the door frame. A trigger plate is fixedly connected to the torsion spring shaft along its radial direction. A trigger post is slidably mounted on the door frame between the trigger plate and the side end of the door leaf, so that the torsion spring shaft can be rotated sequentially by the opening and closing of the door leaf through the trigger post and the trigger plate. A swing rod is also fixedly connected to the torsion spring shaft at the position corresponding to the threshold. The end of the swing rod is connected to the pull rod through a connecting rod, and the two ends of the connecting rod are respectively connected to the two rings or hinges, so that when the swing rod swings back and forth with the rotation of the torsion spring shaft, the pull rod can be used to pull the lifting beam up and release the lifting beam down.

2. The automatic lifting threshold safety door according to claim 1, characterized in that, The tie rod is an L-shaped rod. The horizontal section of the L-shaped rod is connected to the lifting beam, and the vertical section of the L-shaped rod extends from the bottom of the door frame and is connected to the connecting rod. The bottom of the door frame has an movable hole for the vertical section to move.

3. The automatic lifting threshold safety door according to claim 1, characterized in that, The threshold is an n-shaped piece fastened to the lifting beam, and the lead plate is located inside the threshold on the side near the door leaf. The height of the threshold is not higher than the depth of the groove in the ground.

4. The automatic lifting threshold safety door according to claim 3, characterized in that, The top of the lifting beam is also fixed with a limiting member whose top is lower than the top of the roller, and the two sides of the limiting member extend outward to a section outside the connecting rod.

5. The automatic lifting threshold safety door according to claim 3, characterized in that, A support sleeve is fixed inside the door frame to allow the trigger post to slide back and forth.

6. The automatic lifting threshold safety door according to claim 1, characterized in that, A U-shaped steel component is embedded in the ground to form the ground groove, and both ends of the U-shaped steel component are sealed.

7. The automatic lifting threshold safety door according to claim 1, characterized in that, At least two sets of connecting rods are provided between the fixed beam and the lifting beam along their length.

8. The automatic lifting threshold safety door according to claim 1, characterized in that, The roller is fixed to the lifting beam via a mounting base.

9. The automatic lifting threshold safety door according to claim 1, characterized in that, The lower end of the door frame extends into the ground; Alternatively, a limiting plate extending downwards into the groove in the ground can be installed at the bottom of the door frame corresponding to the threshold.

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