Large-span bidirectional sliding industrial door

Abstract

This invention relates to the field of industrial door technology, specifically disclosing a large-span bidirectional sliding industrial door, including a door frame, an upper guide rail, a first door body, a second door body, a drive unit, and a lifting and sealing mechanism. The first and second door bodies can move towards or away from each other along the upper guide rail. The lifting and sealing mechanism is located at the bottom of the door body and includes multiple sealing units arranged along the width of the door body and a lifting control component. After receiving an opening and closing command, the drive unit drives the sealing units to rise before the door body slides, causing the sealing units to detach from the ground or reduce the pressure on the ground; after the door body stops, the lifting control component drives the sealing units to descend, causing the sealing units to press against the ground and seal the bottom gap. The multiple sealing units have independent vertical travel strokes, enabling them to adapt to changes in ground elevation with different descent heights. This invention can reduce the opening and closing resistance of the door body and the wear of the sealing edge, and improve the dustproof, insectproof, and sealing reliability of the bottom of the large-span industrial door.

Description

Technical Field

[0001] This invention relates to the field of industrial door technology, and specifically to a large-span bidirectional sliding industrial door. Background Technology

[0002] Large-span, two-way sliding industrial doors have a wide door body and a long bottom edge. When the door moves along the guide rails, a gap is usually left between the bottom of the door and the ground to prevent the bottom of the door from directly scraping the ground due to localized ground protrusions, uneven settlement, or guide rail installation errors. While this gap reduces the risk of interference during door movement, it also creates a bottom passage connecting the interior and exterior when the door is closed. Dust, sand, insects, cold air, rainwater, or lightweight debris can easily enter the factory through this gap, affecting workshop cleanliness, insulation, and storage safety. For industries with high environmental requirements, such as food, pharmaceuticals, precision machining, and electronic assembly, the pollution and pest problems caused by this bottom gap are particularly pronounced.

[0003] To reduce the impact of bottom gaps on sealing performance, existing industrial doors typically have fixed rubber sealing strips or brush strips installed at the bottom of the door. These strips cover the gaps at the bottom of the door when closed. While fixed sealing strips have a simple structure, they are in continuous contact with the ground during door opening, closing, and movement. This is especially true in large-span industrial doors, where the strips are long and have a large contact area, resulting in significant frictional resistance during door movement. This not only increases the drive load but also makes the sealing strip prone to curling, tearing, wear, and partial detachment. Furthermore, when sand or metal shavings are present on the ground, the fixed sealing strip may drag debris onto the door's path, further increasing the risk of door jamming and sealing strip damage.

[0004] Chinese patent document CN110145220B discloses a structure for a sliding security door. This structure includes a door body, a left door frame, a right door frame, and a ground track. A bottom sealing strip is provided on the bottom side of the door body and moves left and right along the ground track via guide wheels. This type of solution can improve the sealing effect after the door is closed to some extent, but the sealing strip may still experience continuous friction with the ground or nearby structures as the door moves, making it difficult to simultaneously achieve low-resistance opening and closing and a bottom seal after stopping.

[0005] In the aforementioned technical solutions, the bottom seals of the door are mostly arranged continuously as a whole or fixedly installed. When there are local height differences in the ground corresponding to the door, the integral seal is prone to local over-tightening and local unsupported areas; over-tightening areas lead to increased starting resistance and rapid wear of the seal, while unsupported areas cannot effectively prevent dust and insects from entering. For large-span bidirectional sliding industrial doors, the bottom sealing length increases significantly with the increase of the door span, and ground flatness errors are more likely to accumulate over long distances. A single integral sealing strip or a simple fixed sealing structure is difficult to form a stable and continuous sealing contact along the entire bottom of the door. Summary of the Invention

[0006] This invention provides a large-span bidirectional sliding industrial door, aiming to solve the problems in related technologies where dust and insects easily enter through the bottom gaps of large-span bidirectional sliding industrial doors, while fixed sealing strips increase the door's opening and closing resistance and accelerate wear.

[0007] A large-span, bidirectional sliding industrial door includes a door frame, an upper guide rail, a first door body, a second door body, and a driving component. The first and second door bodies are slidably mounted within the door frame along the upper guide rail and can move towards or away from each other under the drive of the driving component. A gap exists between the bottom of the first and second door bodies and the ground. Both the first and second door bodies are equipped with lifting sealing mechanisms at their bottoms for sealing the gaps. Each lifting sealing mechanism includes multiple sealing units and a lifting control component. The sealing units are arranged sequentially along the width direction of their respective door bodies, and each sealing unit has a corresponding sealing function. The vertical movement of the door body; the lifting control component is connected to multiple sealing units and can drive the multiple sealing units to rise or fall synchronously or separately; after the drive component receives the opening and closing command and before it drives the corresponding door body to slide, the lifting control component first drives the multiple sealing units to rise, so that the multiple sealing units are off the ground or reduce the amount of pressure on the ground, and then the drive component drives the corresponding door body to slide along the upper guide rail; after the drive component stops, the lifting control component drives the multiple sealing units to fall, so that the multiple sealing units press against the ground and seal the gap between the bottom of the corresponding door body and the ground.

[0008] Its effect is as follows: Before the first and second doors move, the sealing unit is raised by the lifting control component, and then the drive component drives the first and second doors to move. This avoids the sealing unit still pressing on the ground and generating drag resistance when the first and second doors start. After the first and second doors stop, the sealing unit is lowered by the lifting control component, allowing the sealing unit to descend to different heights, thereby sealing the gap between the first and second doors and the ground, reducing the entry of dust, insects, cold air, and debris. Multiple sealing units have their own vertical travel stroke, which can press against the ground at different heights when the ground level is uneven, creating a more continuous sealing contact at the bottom of large-span doors.

[0009] Preferably, the lifting control assembly includes a lifting beam and a lifting drive component. Each sealing unit is provided with a vertical slide rail. The lifting beam passes through the vertical slide rails of multiple sealing units. The lifting beam can move up and down within the vertical slide rails and can drive the corresponding sealing unit to rise when it rises to abut against the top of the vertical slide rail. The lifting drive component is installed inside the corresponding door body and is used to drive the lifting beam to rise or fall, so that the lifting beam changes the position of multiple sealing units relative to the corresponding door body.

[0010] Its effects are as follows: the lifting beam can serve as a unified lifting component for multiple sealing units, allowing multiple sealing units to be lifted as a whole before the door moves; the vertical slide creates a vertical free travel between the lifting beam and the sealing units, so that when the sealing units descend to the ground, different sealing units can stay at different heights according to the height difference of the ground, avoiding the problem that a single integral sealing edge cannot adapt to local unevenness.

[0011] Preferably, each sealing unit includes a sealing seat, a flexible sealing edge, and a guide portion. The guide portion is disposed between the sealing seat and the corresponding door body, and the flexible sealing edge is disposed at the lower end of the sealing seat and is used to press against the ground.

[0012] Its effects are as follows: the sealing seat provides support for the flexible edge sealing, making it less likely to twist or curl when the flexible edge sealing is arranged over a long distance; the guide part limits the lifting direction of the sealing seat, so that each sealing unit can be lifted and lowered stably in the vertical direction; after the flexible edge sealing is pressed against the ground, it can fill the small unevenness of the ground through its own deformation, thereby improving the bottom sealing effect.

[0013] Preferably, each sealing unit is equipped with a one-way locking component between itself and the corresponding door. When the lifting beam is at the bottom of its stroke, the one-way locking component restricts the sealing unit from moving upward relative to the corresponding door. When the lifting beam rises and abuts against the top of the vertical slide, the one-way locking component unlocks, allowing the sealing unit to rise relative to the corresponding door.

[0014] Its effects are as follows: after the door stops, the sealing unit can move downwards to find the ground and remain in contact with the ground under its own weight or reset action; the one-way locking component can prevent the sealing unit from being lifted in the opposite direction when subjected to wind pressure, negative pressure or external disturbances, thereby maintaining the stability of the bottom seal. Before the door restarts, the lifting beam first unlocks the one-way locking component, and then drives the sealing unit to rise, avoiding the locked state from hindering the lifting of the sealing edge.

[0015] Preferably, the one-way locking assembly includes an inclined slide groove, a limiting ball, an elastic element, and a traction unlocking element installed on one side of the guide portion. The inclined slide groove gradually approaches the guide portion from bottom to top. The limiting ball rests between the guide portion and the inclined slide groove. The elastic element applies an upward elastic force to the limiting ball so that the limiting ball enters the locking position that wedges the guide portion. Before the lifting beam rises and abuts against the top of the vertical slide, the traction unlocking element drives the limiting ball to descend and disengage from the locking position.

[0016] Its effect is that the inclined slide and the limiting ball can form a wedge-tight one-way locking structure. When the sealing unit moves upward, the limiting ball is more easily squeezed into the wedge-tight area. When the sealing unit moves downward, the limiting ball can exit the wedge-tight trend, thus meeting the usage requirements of "being able to fall to the ground and not easily moving upward when disturbed". The traction unlocking component cooperates with the lifting beam to make the unlocking action earlier than the sealing unit's upward action, and the action sequence is clear.

[0017] Preferably, the traction unlocking component includes a traction rope, one end of which is connected to a limiting ball, and the other end of which is connected to a lifting beam after passing through a reversing part located at the bottom of the inclined chute.

[0018] Its advantages are: the traction rope can use the upward stroke of the lifting beam to achieve the pre-pulling down unlocking of the limit ball, without the need to set up an electronic unlocking component for each sealing unit. The structure is simple, easy to hide in the door body interlayer, and can reduce the impact of dust and impact on exposed parts.

[0019] Preferably, the lifting drive includes a lifting part and two pull ropes respectively connected to the lifting beam. The pull ropes pass through the corresponding door body and are connected to the lifting part. A delayed motion mechanism is provided between the lifting part and the drive, which is used to make the lifting part rise before the corresponding door body slides.

[0020] Its effects are as follows: the lifting unit drives the lifting beam to rise through two pull ropes, which can make the force on both ends of the lifting beam relatively balanced and reduce the tilt of the lifting beam; the delayed motion mechanism prioritizes the conversion of the initial motion of the drive component into the upward motion of the lifting unit, ensuring that the sealing edge has been lifted before the door body actually slides, thereby reducing the starting friction and sealing edge damage from the action sequence.

[0021] Preferably, the delayed motion mechanism includes a lateral sliding part, and a horizontal slide groove is provided in the corresponding door body along the width of the corresponding door body. The lateral sliding part is slidably installed in the horizontal slide groove. A connecting rod is hinged between the lateral sliding part and the lifting part. The lateral sliding part is connected to the driving member. The driving member can actively slide along the upper guide rail. When the lateral sliding part slides to one end of the horizontal slide groove, the lateral sliding part drives the door body to start sliding.

[0022] Its effect is that the horizontal slide provides a predetermined empty stroke for the lateral movement part. The front displacement after the drive unit is started is used to push the lateral movement part to move in the horizontal slide. The lateral movement part lifts the lifting part through the connecting rod. After the lateral movement part reaches the end of the horizontal slide, it transmits the pushing and pulling force to the door body, so that the action of "lifting the edge first and then pushing the door body" is automatically completed by the mechanical stroke, reducing the complexity of the control system.

[0023] Preferably, the door body is equipped with a locking assembly for locking the door body together with the upper guide rail. The locking assembly has two unlocking parts respectively located at both ends of the horizontal slide rail. When the lateral movement part moves to the position of one of the unlocking parts, the locking assembly unlocks.

[0024] Its effect is as follows: before the edge sealing rises, the locking assembly can prevent the door from sliding prematurely, so that the initial displacement of the drive component acts first on the lifting edge sealing mechanism; when the lateral movement part moves to the end of the horizontal slide, the locking assembly unlocks, and the door begins to slide, thus ensuring the stability of the sequence between the pre-lifting action and the door's translational action. The two unlocking parts adapt to the door's opening and closing movement requirements in both directions.

[0025] Preferably, the locking assembly includes a lifting rod that slides up and down inside the door body. The top of the lifting rod is provided with an elastic pin. Two unlocking parts are located at the bottom ends of the lifting rod, respectively. The unlocking parts are upwardly inclined slopes. A row of locking grooves is provided on the upper guide rail along its length direction. When the lateral moving part moves to the unlocking part, the lifting rod descends and causes the elastic pin to disengage from the locking groove.

[0026] Its effects are as follows: the elastic pin and locking groove can provide reliable limit when the door is stationary, avoiding unexpected displacement of the door due to wind pressure, slope or accidental contact; the lateral movement can push the inclined plane to lower the lifting rod, and the unlocking action is linked with the pre-lifting stroke of the lateral movement. The structure is compact and easy to install inside the door.

[0027] The beneficial effects of the present invention using the above technical solution are as follows: By setting a lifting sealing mechanism at the bottom of the door, the industrial door can lift the sealing edge before sliding and lower it after stopping, thus achieving both low-resistance opening and closing and bottom sealing; by arranging multiple sealing units in segments with independent vertical travel, the sealing edge can adapt to changes in the ground height below the large-span door, reducing local suspension and local overpressure; through the cooperation of the lifting beam, vertical slide, and one-way locking assembly, while achieving synchronous lifting, each sealing unit is allowed to fall to the ground separately and remain stable on the ground when the sealing is stopped; through the cooperation of the delayed motion mechanism and locking assembly, the initial action of the drive component is used to lift the sealing edge and unlock the door before driving the door to slide, improving the reliability of the action sequence and reducing wear on the sealing components and load on the drive component. Attached Figure Description

[0028] Figure 1This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 This is a cross-sectional view of the first gate in this invention.

[0030] Figure 3 This is a schematic diagram of the sealing unit in this invention.

[0031] Figure 4 for Figure 2 A magnified structural diagram at point A.

[0032] Figure 5 for Figure 4 A magnified structural diagram at point B in the middle.

[0033] Figure 6 for Figure 2 A magnified structural diagram at point C.

[0034] Figure 7 for Figure 6 A magnified structural diagram at point D.

[0035] Figure label:

[0036] 1. Door frame; 11. Upper guide rail; 111. Locking groove; 2. First door body; 3. Second door body; 4. Drive component; 5. Lifting and sealing mechanism; 51. Sealing unit; 511. Sealing seat; 512. Flexible sealing; 513. Guide part; 514. Vertical slide rail; 52. Lifting control assembly; 521. Lifting beam; 522. Lifting drive component; 5221. Lifting part; 5222. Pull rope; 53. One-way locking assembly; 531. Inclined slide rail; 532. Limit ball; 533. Elastic component; 534. Traction rope; 535. Reversing part; 54. Delayed motion mechanism; 541. Lateral movement part; 542. Horizontal slide rail; 543. Connecting rod; 55. Locking assembly; 551. Lifting rod; 552. Elastic pin; 553. Unlocking part; 6. Ground. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, with examples of the embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] like Figures 1 to 7As shown, a large-span bidirectional sliding industrial door includes a door frame 1, an upper guide rail 11, a first door body 2, a second door body 3, a drive unit 4, and a lifting and sealing mechanism 5 disposed at the bottom of the first door body 2 and the second door body 3. The door frame 1 is used to fix the door at the building opening of a factory, warehouse, or workshop. The upper guide rail 11 is disposed on the upper part of the door frame 1 and extends along the width direction of the building opening. The first door body 2 and the second door body 3 are respectively connected to the upper guide rail 11 through sliding blocks, so that the first door body 2 and the second door body 3 can move towards each other along the upper guide rail 11 to close the door opening, or can move away from each other along the upper guide rail 11 to open the door opening.

[0039] Both the first door body 2 and the second door body 3 are large-span doors. Due to their large width, the bottom of the doors cannot usually move completely flush with the ground 6. Otherwise, scratches and jamming could easily occur if there are local protrusions, construction errors, settlement deformation, or debris accumulation on the ground 6. Therefore, gaps are provided between the bottom of the first door body 2 and the ground 6 and the ground 6. These gaps provide clearance for the bottom of the doors when they move, but if they are not sealed after the doors stop or close, external dust, insects, cold air, rainwater, or lightweight debris can easily enter the interior area through these gaps. The lifting and sealing mechanism 5 is used to avoid the ground 6 when the doors need to move and to seal the gap after the doors stop.

[0040] The lifting edge sealing mechanism 5 is located within the bottom interlayer of the first door body 2 and the second door body 3. A hollow mounting cavity can be formed at the bottom of the door body, and most of the transmission structure of the lifting edge sealing mechanism 5 is hidden within this cavity. The lifting edge sealing mechanism 5 includes multiple sealing units 51 and a lifting control assembly 52. ​​The multiple sealing units 51 are arranged sequentially along the width direction of the corresponding door body, and together they form a segmented edge sealing extending along the bottom edge of the door body. Each sealing unit 51 can move up and down relative to the corresponding door body, so different sealing units 51 can determine their final descent position according to the different heights of the ground 6.

[0041] Compared to a single, continuous, fixed sealing strip, the segmented sealing unit 51 is more suitable for large-span doors. Large-span doors have long bottom edges, and localized unevenness differences in the ground 6 accumulate over a long distance. If a single sealing strip is used, if one section is raised by a protrusion in the ground 6, adjacent areas may also be raised, creating gaps in low-lying areas. Increasing the overall compression to seal low-lying areas would over-tighten the raised areas, increasing opening and closing resistance and accelerating wear. This embodiment uses multiple sealing units 51 that move up and down independently, so that each sealing unit 51 corresponds only to a shorter bottom area, allowing for more flexible adaptation to changes in ground 6 height.

[0042] Each sealing unit 51 includes a sealing seat 511, a flexible edge seal 512, and a guide portion 513. The sealing seat 511 is a rigid or semi-rigid support component, made of metal profiles, engineering plastics, or composite materials. The sealing seat 511 is used to maintain the installation shape of the flexible edge seal 512 and prevent the flexible edge seal 512 from excessively curling after prolonged contact with the ground surface 6. The flexible edge seal 512 is located at the lower end of the sealing seat 511 and is made of rubber strips, elastic plastic strips, flexible strips with bristles, or composite sealing strips. After contacting the ground surface 6, the flexible edge seal 512 can undergo local elastic deformation to fill the small unevenness of the ground surface 6, thereby improving the dustproof, insectproof, and windproof effects.

[0043] A guide portion 513 is disposed between the sealing seat 511 and the corresponding door body. Preferably, the guide portion 513 is disposed on the upper part of the sealing seat 511 and slides in cooperation with the vertical guide structure within the bottom interlayer of the door body. The function of the guide portion 513 is to restrict the movement direction of the sealing seat 511, ensuring that the sealing seat 511 moves primarily vertically up and down, preventing the sealing unit 51 from swinging back and forth or tilting laterally when the door body moves or is subjected to external wind pressure.

[0044] The lifting control assembly 52 includes a lifting beam 521 and a lifting drive 522. The lifting beam 521 extends along the width direction of the corresponding door body and is located in the upper or middle region of the plurality of sealing units 51. The lifting drive 522 is disposed inside the corresponding door body and is used to drive the lifting beam 521 to rise or fall.

[0045] Each sealing unit 51 is provided with a vertical slide 514, and a lifting beam 521 passes through the vertical slides 514 of multiple sealing units 51. The vertical slide 514 is a sliding space formed by limiting the movement on both sides. After passing through the vertical slide 514, the lifting beam 521 can move up and down within the vertical slide 514. When the lifting beam 521 moves upward relative to the sealing unit 51 but has not yet reached the top of the vertical slide 514, the lifting beam 521 only has a free stroke within the vertical slide 514. At this time, the lifting beam 521 can first complete actions such as unlocking or pre-tightening. When the lifting beam 521 continues to rise and abuts the top of the vertical slide 514, the lifting beam 521 applies an upward pushing or pulling force to the sealing unit 51, thereby driving the corresponding sealing unit 51 to rise as a whole.

[0046] The vertical slide rail 514 ensures that the lifting beam 521 and each sealing unit 51 are not rigidly fixed. After the door stops, the lifting beam 521 descends to the bottom of its travel, and the different sealing units 51 can move downwards under their own weight until their respective flexible sealing edges 512 are pressed against the corresponding ground 6. When one position of the ground 6 is higher, the corresponding sealing unit 51 will contact the ground 6 earlier and stop descending; when another position of the ground 6 is lower, the corresponding sealing unit 51 can continue to descend a greater distance, thus maintaining contact between the flexible sealing edges 512 and the ground 6. The lifting beam 521 can be located at different heights within the vertical slide rail 514 of different sealing units 51, thereby allowing multiple sealing units 51 to form different descent heights.

[0047] The lifting drive component 522 includes a lifting part 5221 and two pull ropes 5222 respectively connected to the lifting beam 521. The lifting part 5221 is vertically movably installed inside the door body. The two pull ropes 5222 are respectively connected to the two ends or near the ends of the lifting beam 521. The pull ropes 5222 pass through guide wheels and a cable channel inside the door body before connecting to the lifting part 5221. When the lifting part 5221 rises, the two pull ropes 5222 simultaneously pull the lifting beam 521 upward, so that the two ends of the lifting beam 521 are subjected to force synchronously, reducing the possibility of the lifting beam 521 tilting due to unilateral force. When the lifting part 5221 descends or is released, the lifting beam 521 descends under its own weight.

[0048] To ensure the bottom edge of the door is raised before sliding, a delayed motion mechanism 54 is provided between the lifting unit 5221 and the driving component 4. After the lifting unit 5221 completes the pre-lifting, the driving component 4 then transmits the pushing and pulling force to the door. This structure avoids the flexible edge 512 remaining pressed against the ground 6 when the door is first started, reducing starting resistance and lowering the risk of the flexible edge 512 being dragged, curled, or torn.

[0049] The delayed motion mechanism 54 includes a lateral movement part 541. A horizontal slide groove 542, extending along the width of the door body, is provided inside the door body. The lateral movement part 541 is slidably installed within the horizontal slide groove 542. A connecting rod 543 is hinged between the lateral movement part 541 and the lifting part 5221. The lateral movement part 541 is connected to the drive member 4. The drive member 4 can actively slide along the upper guide rail 11. After the drive member 4 is activated, it first drives the lateral movement part 541 to move within the horizontal slide groove 542. Since the door body is restricted from moving immediately by the locking component 55, the lateral displacement of the lateral movement part 541 is converted into the vertical upward movement of the lifting part 5221 through the connecting rod 543. After the lifting part 5221 rises, it drives the lifting beam 521 to rise via the pull rope 5222. The lifting beam 521 then drives the sealing unit 51 to move upward.

[0050] The length of the horizontal slide 542 corresponds to the pre-lift stroke. During the process of the lateral moving part 541 moving from one end of the horizontal slide 542 to the other end, the door body remains basically stationary, the lifting part 5221 completes the rise, and the lifting beam 521 completes the lifting of multiple sealing units 51. When the lateral moving part 541 moves to the end of the horizontal slide 542, the lateral moving part 541 abuts against the end of the horizontal slide 542 or the force-bearing structure inside the door body. When the driving member 4 continues to move, the lateral moving part 541 no longer slides relative to the door body, but transmits the driving force to the door body, and the door body begins to slide along the upper guide rail 11.

[0051] Since the first door 2 and the second door 3 need to move towards each other and away from each other, the lateral moving part 541 can move in two directions within the horizontal slide 542. Both ends of the horizontal slide 542 can serve as push-pull force-bearing ends. When the door needs to move in one direction, the lateral moving part 541 moves towards the end corresponding to that direction and completes the pre-lifting; when the door needs to move in the opposite direction, the lateral moving part 541 moves towards the other end, and similarly drives the lifting part 5221 to rise through the connecting rod 543.

[0052] A locking assembly 55 is installed on the door body to lock the door body to the upper guide rail 11. The locking assembly 55 does not replace the door lock permanently, but rather restricts the immediate sliding of the door body during the initial activation of the drive unit 4, ensuring that the initial movement of the drive unit 4 prioritizes driving the lateral sliding part 541 to complete the pre-lift. Without the locking assembly 55, the drive unit 4 might directly move the door body upon activation, resulting in insufficient relative displacement of the lateral sliding part 541 within the horizontal slide groove 542, preventing the lifting part 5221 from rising in time, and potentially causing the bottom sealing edge to rub against the ground 6. The locking assembly 55 ensures the reliable occurrence of the pre-lift stroke.

[0053] The locking assembly 55 includes a lifting rod 551 that slides vertically within the door body. A resilient pin 552 is located at the top of the lifting rod 551, and a row of locking grooves 111 is provided along the length of the upper guide rail 11. Under elastic action, the resilient pin 552 can extend into the corresponding locking groove 111, thereby restricting the movement of the door relative to the upper guide rail 11. Because the upper guide rail 11 has a row of locking grooves 111, even if the door is stopped in different open positions, the resilient pin 552 can still enter adjacent locking grooves 111, giving the door a certain positioning capability when stopped and preventing unexpected sliding of the door due to wind pressure, slope, or accidental contact.

[0054] The locking assembly 55 has two unlocking parts 553 respectively located at both ends of the horizontal slide rail 542. The two unlocking parts 553 are located at the bottom ends of the lifting rod 551, and the unlocking parts 553 are upwardly inclined slopes. When the lateral moving part 541 moves within the horizontal slide rail 542 to the position of one of the unlocking parts 553, the lateral moving part 541 abuts against the slope and pushes the lifting rod 551 down. When the lifting rod 551 descends, it causes the elastic pin 552 to disengage from the locking groove 111, and the door is released from locking with the upper guide rail 11. Since the unlocking parts 553 are located at both ends of the horizontal slide rail 542, the lateral moving part 541 can trigger unlocking when it reaches the corresponding end, regardless of whether it moves to the left or the right, so that the door can be opened in both directions.

[0055] After receiving the opening and closing command, the drive unit 4 actively slides along the upper guide rail 11. The lateral movement part 541 first moves within the horizontal slide groove 542, and the connecting rod 543 pushes the lifting part 5221 to rise. The lifting part 5221 raises the lifting beam 521 via the pull rope 5222. The lifting beam 521 first unlocks the sealing unit 51 and then drives the sealing unit 51 to rise. When the lateral movement part 541 moves to the end of the horizontal slide groove 542, it pushes the unlocking part 553, causing the elastic pin 552 to disengage from the locking groove 111. Then, the lateral movement part 541 abuts against the end of the horizontal slide groove 542 or the door body's force-bearing part, and the drive unit 4 continues to move, thus driving the door body to begin sliding. At this time, multiple sealing units 51 have already detached from the ground 6 or significantly reduced their pressure on the ground 6.

[0056] Each sealing unit 51 is also equipped with a one-way locking component 53 between itself and the corresponding door body. The one-way locking component 53 is used to prevent the sealing unit 51 from moving upwards in the opposite direction after the door body stops and the sealing unit 51 descends to the ground. Since large-span industrial doors are usually installed on the exterior walls of factory buildings or at passageway openings, the door body may be subject to wind pressure, indoor and outdoor pressure differences, ground vibration 6, and disturbances caused by the passage of personnel and vehicles. If the sealing unit 51 relies solely on its own weight to press against the ground 6, it may briefly bounce upwards when disturbed, forming a momentary leak. The one-way locking component 53 can maintain the height of the sealing unit 51 after it descends to the ground position, so that the flexible sealing edge 512 is stably pressed against the ground 6.

[0057] The one-way locking assembly 53 includes an inclined slide 531, a limiting ball 532, an elastic element 533, and a traction unlocking element. The inclined slide 531 is installed on one side of the guide portion 513, and the inclined slide 531 gradually approaches the guide portion 513 from bottom to top. The limiting ball 532 is disposed between the inclined slide 531 and the guide portion 513. The elastic element 533 applies an upward elastic force to the limiting ball 532, causing the limiting ball 532 to tend to enter the upper wedging area of ​​the inclined slide 531. When the sealing unit 51 attempts to rise relative to the door body, the guide portion 513 drives or squeezes the limiting ball 532 to move towards the upper part of the inclined slide 531. As the upper part of the inclined slide 531 gradually approaches the guide portion 513, the limiting ball 532 is clamped between the guide portion 513 and the inclined slide 531, thereby preventing the sealing unit 51 from continuing to rise.

[0058] When the sealing unit 51 needs to descend and touch the ground, the guide portion 513 moves downward relative to the inclined slide 531, and the limiting ball 532 is less likely to be squeezed into a tighter wedging area, allowing the sealing unit 51 to descend smoothly. Thus, the one-way locking assembly 53 creates a one-way locking effect that allows the sealing unit 51 to fall while restricting its upward movement. This effect allows multiple sealing units 51 to find the ground 6 and remain in contact with the ground after the door stops, while preventing them from easily shifting upwards and causing gaps due to localized wind pressure or the pushing of insects or debris. It also provides support to the door, preventing deformation of the upper stress-bearing parts due to prolonged hanging of the door.

[0059] The traction unlocking mechanism is used to release the one-way locking assembly 53 before the door is started. The traction unlocking mechanism includes a traction rope 534, one end of which is connected to a limit ball 532, and the other end, after passing through a reversing part 535 located at the bottom of the inclined slide 531, is connected to a lifting beam 521. Because the traction rope 534 changes its force direction via the reversing part 535, the lifting beam 521 can pull the limit ball 532 downwards during the initial rising phase via the traction rope 534, causing the limit ball 532 to leave the wedging area.

[0060] The free travel between the lifting beam 521 and the vertical slide rail 514 provides unlocking time for the traction unlocking component. When the lifting beam 521 begins to rise, it has not yet reached the top of the vertical slide rail 514, so the sealing unit 51 itself has not yet been moved upward by the lifting beam 521. At this time, the upward displacement of the lifting beam 521 mainly acts on the limiting ball 532 through the traction rope 534, pulling the limiting ball 532 down to the unlocked position. When the lifting beam 521 continues to rise and reaches the top of the vertical slide rail 514, the one-way locking component 53 has been released, and the lifting beam 521 can smoothly drive the sealing unit 51 upward without the lifting beam 521 forcibly pulling the locked sealing unit 51, causing jamming or structural damage.

[0061] During the sliding of the door, the lifting unit 5221 remains in the raised state, and the pull rope 5222 maintains traction on the lifting beam 521. The lifting beam 521 abuts against the top of the vertical slide rail 514, keeping the multiple sealing units 51 in the raised position. The flexible edge sealing 512 can be completely detached from the ground 6, or only the amount of pressure on the ground 6 can be reduced. In actual use, if the ground 6 environment is clean and further reduction of wear is required, the flexible edge sealing 512 can be completely off the ground; if a slight dust-sweeping effect is required when the door moves, the flexible edge sealing 512 can be only lightly pressed against the ground 6 or maintain a small gap with the ground 6. The above adjustments can be set by the stroke of the lifting unit 5221, the length of the pull rope 5222, or the position of the lifting beam 521.

[0062] When the drive unit 4 stops, the lateral movement part 541 is no longer subjected to continuous pushing and pulling forces. The lifting part 5221 can descend under its own weight, spring, or reset mechanism, and the pull rope 5222 releases the lifting beam 521. After the lifting beam 521 descends, the multiple sealing units 51 are no longer lifted. Each sealing unit 51 moves downward under its own weight, the elastic restoring force of the flexible sealing edge 512, or the action of the additional reset spring, until the flexible sealing edge 512 presses against the ground 6. Since each sealing unit 51 corresponds to a different position on the ground 6, the distance the sealing unit 51 descends can be different, thus adapting to the height difference of the ground 6.

[0063] During the descent of the sealing unit 51, the one-way locking component 53 does not obstruct the downward movement of the sealing unit 51. After the sealing unit 51 descends to the ground 6, the flexible sealing edge 512 is compressed and deformed by the reaction force of the ground 6, the guide part 513 stops moving downward, and the limiting ball 532 enters the wedge-tight position under the action of the elastic element 533. When the sealing unit 51 tends to move upward due to external disturbances, the limiting ball 532 wedges the guide part 513, preventing the sealing unit 51 from jumping upward and keeping the flexible sealing edge 512 in a ground-hugging state. This makes the bottom seal more stable after the industrial door stops.

[0064] In this embodiment, an overlap is provided between two adjacent sealing units 51. The overlap covers the vertical gap between the two adjacent sealing units 51. When the two adjacent sealing units 51 are at different lowering heights due to the different heights of the ground 6, the flexible overlap can still cover the gap between them, preventing dust or insects from entering from the segment of the sealing unit 51.

[0065] The drive unit 4 is an electric trolley that moves along the upper guide rail 11. There are two drive units 4, which are respectively set on the first door body 2 and the second door body 3, so that the two close towards each other or open in opposite directions. When the door body is about to open from the closed state, the drive unit 4 receives the opening command and first actively slides along the upper guide rail 11. Since the locking component 55 still locks the door body to the upper guide rail 11, the door body does not move immediately, and the lateral movement part 541 generates relative displacement in the horizontal slide groove 542. The lateral movement part 541 pushes the lifting part 5221 to rise through the connecting rod 543, and the lifting part 5221 pulls the lifting beam 521 to rise through the pull rope 5222. In the initial stage of the rise of the lifting beam 521, the traction rope 534 pulls down the limit ball 532, so that each one-way locking component 53 is unlocked; then the lifting beam 521 abuts against the top of the vertical slide 514 and drives multiple sealing units 51 to move upward. When the horizontal sliding part 541 reaches the end of the horizontal slide groove 542, it simultaneously pushes the unlocking part 553, causing the elastic pin 552 to disengage from the locking groove 111, and the driving member 4 can continue to slide to drive the door to move.

[0066] When the door moves to the desired stopping position, the drive unit 4 stops. The lateral movement part 541 no longer maintains the pre-lifting end pressure relative to the horizontal slide rail 542, and the lifting part 5221 descends under the reset action, with the lifting beam 521 descending accordingly. Multiple sealing units 51 fall to the ground 6, and the flexible sealing edge 512 presses against the ground 6 and seals the bottom gap. The elastic pin 552 re-enters the locking groove 111 on the upper guide rail 11 under the elastic action, positioning the door with the upper guide rail 11. Since the sealing units 51 automatically descend after the door stops, the user does not need to perform a manual sealing operation, which can prevent dust and insects from entering due to forgetting to close the bottom seal.

[0067] This embodiment also functions when the door stops in a partially open or partially closed position. A row of locking grooves 111 is provided along the length of the upper guide rail 11, and the elastic pin 552 can enter the corresponding locking groove 111 near the door's stopping position. After the drive unit 4 stops, the lifting sealing mechanism 5 releases the sealing unit 51, causing it to descend and seal the bottom gap. Therefore, the industrial door not only has bottom sealing capability when fully closed, but also reduces the entry of external dust, insects, and wind from the bottom during partial opening stops, temporary passage, and vehicle waiting conditions.

[0068] In other embodiments, the lifting control assembly 52 may not use a single lifting beam 521 to control multiple sealing units 51 uniformly, but instead has an independent lifting component for each sealing unit 51. The independent lifting component can be a small electric telescopic rod, a cylinder, a spring-return cam mechanism, or an electromagnetic lifting component. Each independent lifting component can be controlled uniformly by the same controller, or the descent height of different sealing units 51 can be controlled separately based on the ground height detection results. This method can further improve the adaptability of the ground 6, but the structure and control complexity are higher. In contrast, the combination of the lifting beam 521 and the vertical slide rail 514 has a simpler mechanical structure and is more suitable for dusty, humid, or frequently used industrial scenarios.

[0069] In other embodiments, the one-way locking component 53 may also employ a ratchet and pawl structure, a wedge structure, a friction clamping structure, or an elastic snap-fit ​​structure, as long as it allows the sealing unit 51 to move downward when it descends and restricts its upward movement when it is subjected to an upward disturbance. The traction unlocking component is not limited to the traction rope 534; it may also employ a push rod, a paddle, a pull rod, or other structures, as long as it can release the one-way locking before the lifting beam 521 actually drives the sealing unit 51 upward.

[0070] In other embodiments, the delayed motion mechanism 54 can also be a cam idle stroke mechanism, a gear and rack idle stroke mechanism, a rocker arm and fork mechanism, or a linkage 543 mechanism with an elongated hole. The core principle is that the initial stroke of the drive component 4 acts on the lifting and sealing mechanism 5 first, and only after the sealing unit 51 has completed its pre-lifting is the translational driving force transmitted to the door body. Because this action is achieved through mechanical stroke, even if the control system only issues ordinary opening and closing commands, the mechanical structure can automatically complete the action sequence, reducing malfunctions caused by sensor failure or program delays.

[0071] The working principle of this invention is as follows: After receiving the opening and closing command, the driving component 4 first slides actively along the upper guide rail 11. At this time, the locking component 55 restricts the door from moving immediately. The initial displacement of the driving component 4 drives the lateral moving part 541 to move within the horizontal slide groove 542. The lateral moving part 541 pushes the lifting part 5221 upward through the connecting rod 543. The lifting part 5221 drives the lifting beam 521 upward through the pull rope 5222. In the initial stage of the lifting beam 521's rise, the one-way locking component 53 is released by the traction unlocking component. Subsequently, the lifting beam 521 abuts against the top of the vertical slide rail 514 and drives multiple sealing units 51 upward, causing the flexible sealing edge 512 to detach from the ground 6 or reduce the amount of pressure on the ground 6. After the lateral moving part 541 moves to the end of the horizontal slide groove 542, it triggers the locking component 55 to unlock. When the driving component 4 continues to move, it drives the door to slide along the upper guide rail 11. After the door stops, the lifting control component 52 releases the lifting beam 521 to descend, and multiple sealing units 51 fall and press against the ground 6 respectively. The one-way locking component 53 restricts the sealing units 51 from moving upward in the opposite direction, and the bottom gap is sealed.

[0072] This invention, through the aforementioned structure, eliminates the need for the bottom sealing edge to be fixedly pressed and dragged along the door over long distances. Instead, it automatically lifts before the door moves and automatically lowers after the door stops. For large-span industrial doors, this structure significantly reduces door starting resistance and operational wear. Furthermore, by using multiple sealing units 51 to adapt to different ground heights 6, it ensures continuous sealing of the bottom of the door over a long span. Since the lifting transmission and locking structures can be concealed within the door's internal structure, the external structure is simple and less susceptible to external impacts and dust accumulation, making it suitable for use in factories, warehouses, cleanrooms, and logistics channels.

[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A large-span, bidirectional sliding industrial door, comprising a door frame, an upper guide rail, a first door body, a second door body, and a driving component, characterized in that: The first and second doors are slidably installed in the door frame along the upper guide rail and can move towards each other or away from each other under the drive of the drive unit. There is a gap between the bottom of the first and second doors and the ground. The bottom of both the first and second doors is equipped with a lifting sealing mechanism for sealing gaps. The lifting sealing mechanism includes multiple sealing units and a lifting control component. The multiple sealing units are arranged sequentially along the width direction of the corresponding door, and each sealing unit has a vertical movement stroke relative to the corresponding door. The lifting control assembly is connected to multiple sealing units and can drive the multiple sealing units to rise or fall synchronously or separately; After receiving the opening and closing command, and before the corresponding door body slides, the lifting control component first drives multiple sealing units to rise, so that multiple sealing units are lifted off the ground or the amount of pressure on the ground is reduced. Then the driving component drives the corresponding door body to slide along the upper guide rail. After the drive unit stops, the lifting control component drives multiple sealing units to descend, causing the multiple sealing units to press against the ground and seal the gap between the bottom of the corresponding door and the ground.

2. The large-span bidirectional sliding industrial door according to claim 1, characterized in that, The lifting control assembly includes a lifting beam and a lifting drive. Each sealing unit is provided with a vertical slide. The lifting beam passes through the vertical slide of multiple sealing units. The lifting beam can move up and down within the vertical slide and can drive the corresponding sealing unit to rise when it rises to abut against the top of the vertical slide. The lifting drive is installed in the corresponding door body and is used to drive the lifting beam to rise or fall, so that the lifting beam changes the position of multiple sealing units relative to the corresponding door body.

3. The large-span bidirectional sliding industrial door according to claim 2, characterized in that, Each sealing unit includes a sealing seat, a flexible sealing edge, and a guide. The guide is located between the sealing seat and the corresponding door body, and the flexible sealing edge is located at the lower end of the sealing seat and is used to press against the ground.

4. The large-span bidirectional sliding industrial door according to claim 3, characterized in that, Each sealing unit is equipped with a one-way locking component between itself and the corresponding door. When the lifting beam is at the bottom of its stroke, the one-way locking component restricts the sealing unit from moving upward relative to the corresponding door. When the lifting beam rises and abuts against the top of the vertical slide, the one-way locking component unlocks, allowing the sealing unit to rise relative to the corresponding door.

5. The large-span bidirectional sliding industrial door according to claim 4, characterized in that, The one-way locking assembly includes an inclined slide, a limiting ball, an elastic element, and a traction unlocking element installed on one side of the guide section. The inclined slide gradually approaches the guide section from bottom to top. The limiting ball rests between the guide section and the inclined slide. The elastic element applies an upward elastic force to the limiting ball so that the limiting ball enters the locking position that wedges the guide section. Before the lifting beam rises and abuts against the top of the vertical slide, the traction unlocking element drives the limiting ball to descend and disengage from the locking position.

6. The large-span bidirectional sliding industrial door according to claim 5, characterized in that, The traction unlocking component includes a traction rope, one end of which is connected to a limit ball, and the other end is connected to a lifting beam after passing through a reversing part located at the bottom of the inclined chute.

7. The large-span bidirectional sliding industrial door according to any one of claims 2-6, characterized in that, The lifting drive unit includes a lifting part and two pull ropes that are respectively connected to the lifting beam. The pull ropes pass through the corresponding door body and are connected to the lifting part. A time-delay motion mechanism is provided between the lifting part and the drive unit. The time-delay motion mechanism is used to make the lifting part rise before the corresponding door body slides.

8. The large-span bidirectional sliding industrial door according to claim 7, characterized in that, The delayed motion mechanism includes a lateral sliding part, and a horizontal slide groove is provided in the corresponding door body along the width of the corresponding door body. The lateral sliding part is slidably installed in the horizontal slide groove. A connecting rod is hinged between the lateral sliding part and the lifting part. The lateral sliding part is connected to the driving component. The driving component can actively slide along the upper guide rail. When the lateral sliding part slides to one end of the horizontal slide groove, the lateral sliding part drives the door body to start sliding.

9. The large-span bidirectional sliding industrial door according to claim 8, characterized in that, The door is equipped with a locking assembly for locking the door to the upper guide rail. The locking assembly has two unlocking parts respectively located at both ends of the horizontal slide. When the lateral movement part moves to the position of one of the unlocking parts, the locking assembly unlocks.

10. The large-span bidirectional sliding industrial door according to claim 9, characterized in that, The locking assembly includes a lifting rod that slides up and down inside the door body. The top of the lifting rod is provided with a flexible pin. Two unlocking parts are located at the bottom ends of the lifting rod. The unlocking parts are upward-sloping surfaces. A row of locking grooves is provided on the upper guide rail along its length. When the lateral part moves to the unlocking part, the lifting rod descends, causing the flexible pin to disengage from the locking groove.

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