A heavy sliding door

Abstract

The present application relates to a heavy-duty sliding door, and to the technical field of doors and windows. The sliding door includes a door frame, a plurality of sets of tracks arranged at intervals on the door frame, a plurality of sets of door leaves arranged to slide along different tracks, adjacent door leaves slidingly connected by a sealing assembly, the door leaves locked to the door frame by a locking assembly, and a buffer assembly arranged on one end of the door leaf close to the door frame. When the door leaf slides toward the door frame, the buffer assembly presses against the door frame and slowly reduces the moving speed of the door leaf before pressing against the door frame. The present application slides on different tracks by multiple sets of door leaves, the door leaves are locked to the door frame by a locking assembly, and adjacent door leaves are sealed and connected by a sealing assembly. When the door leaf slides toward one side of the door frame and approaches the door frame, the sliding speed of the door leaf is slowly reduced by the buffer assembly, and then pressed against the door frame at a lower speed, thereby reducing the probability of the door leaf damaging the door frame when the sliding door is closed.

Description

Technical Field

[0001] The present application relates to the technical field of doors and windows, and in particular to a heavy sliding door. Background Art

[0002] Sliding doors are a common type of door used in homes, which refers to doors that can be pushed or pulled. With the development of technology and the diversification of decoration methods, the functions and scope of use of sliding doors are constantly expanding, from traditional board surfaces to glass, fabric, rattan, and aluminum alloy profiles, from sliding doors, folding doors to partition doors.

[0003] As people's demands for sliding doors continue to increase, sliding doors continue to meet the requirements of stable strength, good sealing and heat insulation effects, etc. At the same time, due to the large size of sliding doors, the weight of sliding doors is also large; however, during use, existing sliding doors will produce a large impact sound due to inertia and their own metal properties, and will also cause certain damage to the door frame itself, thereby reducing the sealing and service life of the sliding doors. Utility Model Content

[0004] In order to reduce the probability of the door leaf damaging the door frame when the sliding door is closed, the present application provides a heavy-duty sliding door.

[0005] The heavy sliding door provided in this application adopts the following technical solution:

[0006] A heavy-duty sliding door comprises a door frame, a plurality of sets of tracks arranged at intervals on the door frame, a plurality of sets of door leaves slidably arranged along different tracks, adjacent door leaves slidably connected by a sealing assembly, the door leaves are locked to the door frame by a locking assembly, a buffer assembly is arranged on one end of the door leaf close to the door frame, when the door leaf slides toward the door frame, it is pressed against the door frame by the buffer assembly and the moving speed of the door leaf is slowly reduced before being pressed against the door frame.

[0007] By adopting the above technical solution, multiple groups of door leaves slide on different tracks, the door leaves are locked on the door frame through locking components, and adjacent door leaves are sealed and connected by sealing components. When the door leaves slide to one side of the door frame and approach the door frame, the sliding speed of the door leaves is slowly reduced by the buffer component, and then they are pressed against the door frame at a lower speed, thereby reducing the probability of damage to the door frame by the door leaves when the sliding door is closed.

[0008] Furthermore, the buffer assembly comprises:

[0009] A buffer rubber strip, which is arranged on a side of the door leaf close to the door frame, and a buffer cavity is arranged inside the buffer rubber strip. The buffer rubber strip has a certain elasticity and can automatically recover after deformation without external force;

[0010] An exhaust pipe is arranged on the buffer rubber strip and communicated with the inside of the buffer cavity. The exhaust pipe is used to discharge the gas in the buffer cavity or to suck the external gas into the buffer cavity.

[0011] By adopting the above technical solution, when the door leaf slides toward one side of the door frame and approaches the door frame, the buffer rubber strip is preferentially pressed against the side wall of the door frame. Under the pressure of the door frame on the buffer rubber strip, the buffer cavity is squeezed, so that the gas in the buffer cavity is slowly discharged through the exhaust pipe, thereby slowly reducing the sliding speed of the door leaf.

[0012] Furthermore, the exhaust pipe is provided with a control valve for adjusting the exhaust speed of the exhaust pipe, and the buffering effect of the buffer assembly is adjusted by the control valve.

[0013] By adopting the above technical solution, the control valve is used to control the exhaust speed of the exhaust pipe, and then control the exhaust speed of the buffer chamber.

[0014] Furthermore, the buffer assembly comprises:

[0015] A shell, the shell is arranged on the side wall of the door leaf close to the door frame, and a sliding groove is opened in the shell;

[0016] A buffer rod, the buffer rod is sealingly slidably disposed in the sliding groove and is used to press against the side wall of the door frame, and an air cavity is formed between the bottom of the buffer rod and the sliding groove;

[0017] A buffer tube, which is arranged on the shell and communicated with the inside of the air cavity, and is used to discharge the gas in the air cavity or to suck the external gas into the air cavity;

[0018] An air regulating valve, which is arranged on the buffer pipe and is used to adjust the exhaust speed of the buffer pipe;

[0019] A return spring is arranged on the buffer rod and pressed against the bottom of the sliding groove. The return spring is used to push the buffer rod to return to its original position without external force.

[0020] By adopting the above technical solution, the exhaust speed of the buffer tube is adjusted by the air regulating valve. When the door leaf slides toward the door frame and approaches the door frame, one end of the buffer rod is preferentially pressed against the side wall of the door frame, and slides to the bottom of the sliding groove under the pressure of the door frame on the buffer rod, so that the gas in the air cavity is slowly discharged through the buffer tube, thereby slowly reducing the sliding speed of the door leaf. At the same time, when the door leaf is away from the door frame, the reset spring resets the buffer rod, so as to facilitate the reuse of the buffer rod.

[0021] Furthermore, the buffer tube is arranged on the side wall of the sliding groove and has a certain distance from the bottom of the sliding groove.

[0022] By adopting the above technical solution, when the buffer rod slides to the bottom of the sliding groove, when the bottom of the buffer rod exceeds the contact point between the buffer tube and the sliding groove, the gas inside the air cavity cannot be discharged, so that the buffer rod stops and does not hit the bottom of the sliding groove, thereby reducing the impact force of the buffer rod on the shell.

[0023] Furthermore, a support plate for increasing the contact area is arranged on one side of the sliding rod close to the door frame, and a buffer pad is arranged on one side of the support plate close to the door frame.

[0024] By adopting the above technical solution, the buffer pad is fixedly installed on the support plate, and the support plate is directly pressed against the side wall of the door frame through the buffer pad, thereby reducing the probability of the buffer rod damaging the door frame.

[0025] Further, the sealing assembly comprises:

[0026] Hook plates, two groups of the hook plates are respectively arranged on the sides of the two groups of door leaves that are close to each other, and the two groups of the hook plates are pressed against each other and seal the two groups of door leaves;

[0027] The wool strip is arranged on the side of the hook plate away from the door leaf. When the two groups of hook plates are pressed against each other, the wool strip is pressed against the adjacent hook plates to perform a tight seal.

[0028] By adopting the above technical solution, when the two groups of door leaves move away from each other, the two groups of hook plates approach each other and finally press against each other, so as to perform a sealing connection between the two groups of door leaves. At the same time, the wool strips press against the hook plates, which further improves the sealing and heat preservation effect between the door leaves.

[0029] Furthermore, a screen window is slidably provided on the side of the door frame facing outdoors, and the screen window is also connected to the adjacent door leaf via a sealing assembly.

[0030] By adopting the above technical solution, the screen window is slidably installed on the door frame and connected to the door leaf through a sealing component, so as to block the opening of the door leaf.

[0031] Further, the locking assembly comprises:

[0032] A base, wherein the base is arranged on the door frame;

[0033] A straight lock is arranged on the door leaf, and the straight lock cooperates with a base to lock the door leaf on the door frame.

[0034] By adopting the above technical solution, when the door leaf needs to be locked, the flat lock is moved and the locking rod is driven to slide into the locking area of ​​the base to lock the door leaf on the door frame; at the same time, the flat lock is moved in the opposite direction and the locking rod is driven to slide out of the locking area of ​​the base to unlock the movement of the door leaf.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. Through multiple groups of door leaves sliding on different tracks, the door leaves cooperate with each other and are locked on the door frame through the base and the straight lock, the hook plates on the two adjacent door leaves are pressed against each other, and the wool strips are pressed against the adjacent hook plates, so that the two adjacent door leaves are heat-insulated and sealed. When the door leaf slides to one side of the door frame and approaches the door frame, the buffer rubber strip is pressed against the door frame first and the gas in the buffer cavity is discharged through the exhaust pipe, thereby slowly reducing the sliding speed of the door leaf, and then pressing against the door frame at a lower speed, thereby reducing the probability of the door leaf damaging the door frame when the sliding door is closed.

[0037] 2. During installation, the exhaust speed of the buffer tube is adjusted by the air regulating valve. When the door leaf moves toward the door frame, the buffer pad is pressed against the side wall of the door frame first. Under the pressure of the side wall of the door frame, the buffer rod slides toward the bottom of the sliding groove, so that the gas in the air cavity is slowly discharged through the buffer tube. After the gas in the air cavity is discharged, the support plate and the buffer pad are completely retracted into the groove, so that the speed of the door leaf is slowly reduced and finally pressed against the side wall of the door frame, reducing the probability of damage to the door frame by the door leaf when the sliding door is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the sliding window structure of Example 1 of the present application;

[0039] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0040] Figure 3 is a schematic diagram of a buffer assembly of Example 1 of the present application;

[0041] Figure 4 is a schematic diagram of a buffer assembly of Example 2 of the present application;

[0042] Figure 5 yes Figure 4 Schematic diagram of the cross section of BB.

[0043] Figure numerals: 1. door frame; 11. screen window; 2. door leaf; 21. mounting groove; 22. groove; 3. sealing assembly; 31. hook plate; 32. wool strip; 4. locking assembly; 41. base; 42. straight lock; 5. buffer assembly; 51. buffer rubber strip; 511. buffer cavity; 52. exhaust pipe; 53. control valve; 61. shell; 611. sliding groove; 612. air cavity; 62. buffer rod; 621. sealing ring; 622. support plate; 623. buffer pad; 63. buffer tube; 64. air regulating valve; 65. reset spring. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-5 This application is described in further detail.

[0045] The embodiment of the present application discloses a heavy-duty sliding door.

[0046] Example 1

[0047] Reference Figure 1 and Figure 2 A heavy sliding door comprises a door frame 1, a plurality of tracks are arranged at intervals on the door frame 1, a plurality of door leaves 2 are arranged to slide along different tracks, adjacent door leaves 2 are slidably connected by sealing components 3, the door leaves 2 are locked on the door frame 1 by locking components 4, a buffer component 5 is arranged on one end of the door leaf 2 close to the door frame 1, when the door leaf 2 slides toward the door frame 1, it is pressed against the door frame 1 by the buffer component 5 and the moving speed of the door leaf 2 is slowly reduced before being pressed against the door frame 1.

[0048] Reference Figure 2 The door frame 1 is fixedly installed on the wall, and multiple groups of tracks are fixedly installed at intervals on the bottom of the door frame 1. The door leaves 2 are slidably installed on the tracks. The structures of the multiple groups of door leaves 2 are the same but the installation positions are different. Adjacent door leaves 2 are slidably connected by a sealing assembly 3. The sealing assembly 3 includes a hook plate 31 and a wool strip 32. The two groups of hook plates 31 are respectively installed on the side where the two groups of door leaves 2 are close to each other. When the two groups of door leaves 2 are away from each other, the two groups of hook plates 31 are close to each other and pressed against each other, so as to seal the two groups of door leaves 2. In order to further improve the sealing and heat insulation between the two adjacent groups of door leaves 2, the wool strip 32 is fixedly installed on the side of the hook plate 31 away from the door leaf 2. When the two groups of hook plates 31 are close to each other, the wool strip 32 slides and presses against the hook plate 31 of the adjacent door leaf 2 to seal, so as to prevent gas from entering the contact area of ​​the two groups of hook plates 31, thereby improving the heat insulation and sealing between the two groups of door leaves 2.

[0049] Reference Figure 2 A screen window 11 is fixedly installed on the side of the door frame 1 close to the outdoors, and the screen window 11 slides on the track. The screen window 11 is also connected to the adjacent door leaf 2 through a sealing assembly 3, thereby improving the practicality of the sliding door; three sets of tracks are arranged on the bottom of the door frame 1 of this embodiment, and the three sets of tracks are respectively used to slide and guide two sets of door leaves 2 and one set of screen window 11.

[0050] Reference Figure 2The door leaf 2 is locked on the door frame 1 through a locking assembly 4. The locking assembly 4 includes a base 41 and a straight lock 42. The base 41 is fixedly mounted on the side wall of the door frame 1, and the straight lock 42 is fixedly mounted on the door leaf 2. The base 41 corresponds to the straight lock 42 one by one. When the door leaf 2 is pressed against the side wall of the door frame 1, the locking rod of the straight lock 42 extends into the base 41. When the door leaf 2 needs to be locked, the straight lock 42 is moved and the locking rod is driven to slide into the locking area of ​​the base 41 to lock the door leaf 2 on the door frame 1; at the same time, the straight lock 42 is moved in the opposite direction, and the locking rod is driven to slide out of the locking area of ​​the base 41 to unlock the movement of the door leaf 2.

[0051] Reference Figure 2 and Figure 3 The buffer assembly 5 includes a buffer rubber strip 51 and an exhaust pipe 52. A mounting groove 21 is provided on the side wall of the door leaf 2 close to the door frame 1. The buffer rubber strip 51 is fixedly installed on the mounting groove 21. A buffer cavity 511 is provided inside the buffer rubber strip 51. The buffer rubber strip 51 has a certain elasticity, so that the buffer rubber strip 51 can automatically recover without external force after deformation; the exhaust pipe 52 is fixedly installed on the buffer rubber strip 51, and one end of the exhaust pipe 52 away from the buffer rubber strip 51 is fixedly installed on the door leaf 2 and communicated with the outside world. The exhaust pipe 52 is communicated with the inside of the buffer cavity 511, and the exhaust pipe 52 is used to discharge the gas in the buffer cavity 511 or to suck the external gas into the buffer cavity 511; when the door leaf 2 is closed, the exhaust pipe 52 is in a closed state. 2 moves toward the door frame 1, so that the buffer rubber strip 51 is pressed against the side wall of the door frame 1 first, and the buffer rubber strip 51 is deformed under the pressure of the side wall of the door frame 1, so that the gas in the buffer cavity 511 is slowly discharged through the exhaust pipe 52. After the gas in the buffer cavity 511 is discharged, the buffer rubber strip 51 is completely retracted into the installation groove 21, so that the speed of the door leaf 2 is slowly reduced, and finally pressed against the side wall of the door frame 1, thereby reducing the probability of the door leaf 2 damaging the door frame 1 when the sliding door is closed; when the door leaf 2 is away from the door frame 1, the buffer rubber strip 51 automatically recovers and sucks the outside air into the buffer cavity 511 through the exhaust pipe 52, so as to facilitate the next buffering of the door leaf 2.

[0052] Reference Figure 2 and Figure 3 In order to facilitate the adjustment of the buffering effect of the buffer rubber strip 51, a control valve 53 is fixedly installed on the exhaust pipe 52, and the control valve 53 is used to adjust the exhaust speed of the exhaust pipe 52; when the exhaust speed of the exhaust pipe 52 is faster, the gas in the buffer cavity 511 is quickly discharged, so that the buffering effect of the buffer rubber strip 51 is poor, but the buffering time is short; when the exhaust speed of the exhaust pipe 52 is slow, the gas in the buffer cavity 511 is slowly discharged, so that the buffering effect of the buffer rubber strip 51 is better, but the buffering time is longer, so it is necessary to adjust the exhaust speed of the exhaust pipe 52 according to actual usage.

[0053] The working principle of Example 1 of the present application is:

[0054] Multiple groups of door leaves 2 slide on different tracks, and the door leaves 2 cooperate with each other and are locked on the door frame 1 through the base 41 and the straight lock 42. The hook plates 31 on the two adjacent door leaves 2 are pressed against each other, and the wool strips 32 are pressed against the adjacent hook plates 31, so that the two adjacent door leaves 2 are heat-insulated and sealed. When the door leaves 2 slide toward the side of the door frame 1 and approach the door frame 1, the buffer rubber strip 51 is preferentially pressed against the door frame 1 and the gas in the buffer cavity 511 is discharged through the exhaust pipe 52, thereby slowly reducing the sliding speed of the door leaves 2, and then pressing against the door frame 1 at a lower speed, thereby reducing the probability of damage to the door frame 1 by the door leaves 2 when the sliding door is closed.

[0055] Example 2

[0056] Reference Figure 4 and Figure 5 , the difference between this embodiment and embodiment 1 is that the buffer assembly 5 includes a shell 61, a buffer rod 62, a buffer tube 63 and a reset spring 65, a groove 22 is provided on one end of the door leaf 2 close to the side wall of the door frame 1, the shell 61 is snap-fitted and installed in the groove 22 and locked by bolts, and a sliding groove 611 is provided in the shell 61; the buffer rod 62 is sealingly slidably installed in the sliding groove 611, the buffer rod 62 is used to press against the side wall of the door frame 1, and an air cavity 612 is formed between the bottom of the buffer rod 62 and the bottom of the sliding groove 611. In order to improve the sealing between the sliding rod and the sliding groove 611, a sealing ring 621 is fixedly installed on the side wall of the sliding rod, and the sealing ring 621 is pressed against the side wall of the early sliding groove 611; at the same time, in order to reduce the probability of damage to the door frame 1 by the buffer rod 62, on the side of the buffer rod 62 close to the door frame 1 A support plate 622 for increasing the contact area is fixedly installed, and a buffer pad 623 is also fixedly installed on the side of the support plate 622 close to the door frame 1, so as to reduce the probability of damage to the door frame 1. When the buffer rod 62 is pressed against the bottom of the sliding groove 611, the support plate 622 and the buffer pad 623 are completely received in the groove 22; the buffer tube 63 is fixedly installed on the shell 61, and the buffer tube 63 is connected to the inside of the cavity. The buffer tube 63 is used to discharge the gas in the air cavity 612 or to suck the external gas into the air cavity 612; the return spring 65 is fixedly installed on the buffer rod 62, and the end of the return spring 65 away from the buffer rod 62 is pressed against the bottom of the sliding groove 611, and the return spring 65 is used to push the buffer rod 62 to reset in the absence of external force; the return spring 65 of this embodiment has a relatively small elastic force and can only push the buffer rod 62 to reset when there is no external force.

[0057] Reference Figure 4 and Figure 5When the door leaf 2 moves toward the door frame 1, the buffer pad 623 is pressed against the side wall of the door frame 1 first, and the buffer rod 62 slides toward the bottom of the sliding groove 611 under the pressure of the side wall of the door frame 1, so that the gas in the air cavity 612 is slowly discharged through the buffer tube 63. After the gas in the air cavity 612 is discharged, the support plate 622 and the buffer pad 623 are completely retracted into the groove 22, so that the speed of the door leaf 2 is slowly reduced, and finally pressed against the side wall of the door frame 1, reducing the probability of damage to the door frame 1 by the door leaf 2 when the sliding door is closed; when the door leaf 2 is away from the door frame 1, the return spring 65 pushes the buffer rod 62 to automatically recover, and sucks the outside air into the air cavity 612 through the buffer tube 63, so as to facilitate the next buffering of the door leaf 2.

[0058] Reference Figure 4 and Figure 5 The buffer assembly 5 also includes an air regulating valve 64, which is fixedly mounted on the buffer tube 63 and is used to adjust the exhaust speed of the buffer tube 63; when the exhaust speed of the buffer tube 63 is faster, the gas in the air cavity 612 is quickly discharged, so that the buffer effect of the buffer rod 62 is poor, but the buffering time is short; when the exhaust speed of the buffer tube 63 is slower, the gas in the air cavity 612 is slowly discharged, so that the buffer effect of the buffer rod 62 is better, but the buffering time is longer, so it is necessary to adjust the exhaust speed of the buffer tube 63 according to actual usage.

[0059] Reference Figure 4 and Figure 5 In order to reduce the impact of the buffer rod 62 on the shell 61, the buffer tube 63 is fixedly installed on the side wall of the sliding groove 611 and has a certain distance from the bottom of the sliding groove 611; when the buffer rod 62 slides toward the bottom of the sliding groove 611, when the bottom of the buffer rod 62 exceeds the contact point between the buffer tube 63 and the sliding groove 611, the gas inside the air cavity 612 cannot be discharged, so that the buffer rod 62 stops and does not hit the bottom of the sliding groove 611.

[0060] The working principle of Example 2 of the present application is:

[0061] During installation, the exhaust speed of the buffer tube 63 is adjusted by the air regulating valve 64. When the door leaf 2 moves toward the door frame 1, the buffer pad 623 is pressed against the side wall of the door frame 1 first. Under the pressure of the side wall of the door frame 1, the buffer rod 62 slides toward the bottom of the sliding groove 611, so that the gas in the air cavity 612 is slowly discharged through the buffer tube 63. After the gas in the air cavity 612 is discharged, the support plate 622 and the buffer pad 623 are completely retracted into the groove 22, so that the speed of the door leaf 2 is slowly reduced and finally pressed against the side wall of the door frame 1, thereby reducing the probability of damage to the door frame 1 by the door leaf 2 when the sliding door is closed.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heavy sliding door, characterized in that: The invention comprises a door frame (1), a plurality of groups of tracks arranged at intervals on the door frame (1), a plurality of groups of door leaves (2) arranged slidably along different tracks, adjacent door leaves (2) being slidably connected via a sealing assembly (3), the door leaves (2) being locked on the door frame (1) via a locking assembly (4), a buffer assembly (5) being arranged on one end of the door leaf (2) close to the door frame (1), and when the door leaf (2) slides towards the door frame (1), it is pressed against the door frame (1) via the buffer assembly (5) and the moving speed of the door leaf (2) is slowly reduced before it is pressed against the door frame (1); The buffer component (5) comprises: a buffer rubber strip (51), the buffer rubber strip (51) being arranged on a side of the door leaf (2) close to the door frame (1), a buffer cavity (511) being arranged inside the buffer rubber strip (51), the buffer rubber strip (51) having a certain elasticity so that the buffer rubber strip (51) automatically recovers after being deformed without the action of external force; an exhaust pipe (52), the exhaust pipe (52) being arranged on the buffer rubber strip (51) and communicating with the interior of the buffer cavity (511), the exhaust pipe (52) being used to discharge gas in the buffer cavity (511) or to draw external gas into the buffer cavity (511); The locking assembly (4) comprises: A base (41), wherein the base (41) is arranged on the door frame (1); A straight lock (42), the straight lock (42) being arranged on the door leaf (2), the straight lock (42) cooperating with the base (41) to lock the door leaf (2) onto the door frame (1).

2. A heavy-duty sliding door according to claim 1, characterized in that: The exhaust pipe (52) is provided with a control valve (53) for adjusting the exhaust speed of the exhaust pipe (52), and the buffering effect of the buffer component (5) is adjusted through the control valve (53).

3. A heavy-duty sliding door according to claim 1, characterized in that: The buffer component (5) comprises: A shell (61), the shell (61) being arranged on a side wall of the door leaf (2) close to the door frame (1), and a sliding groove (611) being provided in the shell (61); A buffer rod (62), the buffer rod (62) being sealingly slidably disposed in the sliding groove (611) and used to press against the side wall of the door frame (1), an air cavity (612) being formed between the bottom of the buffer rod (62) and the sliding groove (611); a buffer tube (63), the buffer tube (63) being arranged on the housing (61) and communicating with the interior of the air cavity (612), the buffer tube (63) being used to discharge gas from the air cavity (612) or to draw external gas into the air cavity (612); An air regulating valve (64), the air regulating valve (64) being arranged on the buffer pipe (63) and used for regulating the exhaust speed of the buffer pipe (63); A return spring (65), the return spring (65) being arranged on the buffer rod (62) and pressed against the bottom of the sliding groove (611), the return spring (65) being used to push the buffer rod (62) to return to its original position in the absence of an external force.

4. A heavy-duty sliding door according to claim 3, characterized in that: The buffer tube (63) is arranged on the side wall of the sliding groove (611) and is at a certain distance from the bottom of the sliding groove (611).

5. The heavy-duty sliding door according to claim 3, characterized in that: A support plate (622) for increasing the contact area is provided on the side of the buffer rod (62) close to the door frame (1), and a buffer pad (623) is provided on the side of the support plate (622) close to the door frame (1).

6. The heavy-duty sliding door according to claim 1, characterized in that: The sealing assembly (3) comprises: Hook plates (31), two groups of the hook plates (31) are respectively arranged on the sides of the two groups of door leaves (2) that are close to each other, and the two groups of the hook plates (31) are pressed against each other and seal the two groups of door leaves (2); The wool strip (32) is arranged on a side of the hook plate (31) away from the door leaf (2), and when two groups of the hook plates (31) are pressed against each other, the wool strip (32) presses against adjacent hook plates (31) to perform a pressing and sealing operation.

7. The heavy-duty sliding door according to claim 1, characterized in that: A screen window (11) is slidably provided on the side of the door frame (1) facing outdoors, and the screen window (11) is also connected to an adjacent door leaf (2) via a sealing assembly (3).

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