JP7396584B2 - fire door structure - Google Patents

Description

The present invention relates to a fire door structure, and particularly to a fire door structure for a parking lot.

Conventionally, lift-type mechanical parking lots have been known. For example, when a mechanical parking lot is provided in a building designated as a quasi-fireproof building or a fireproof building, the walls around the mechanical parking lot fall under the fire prevention zone. Therefore, when a fire occurs inside the mechanical parking lot, it is necessary to keep the fire inside the mechanical parking lot for a certain period of time. As such a technique, for example, the technique described in Patent Document 1 is known.

Japanese Patent Application Publication No. 11-210256

The technique described in Patent Document 1 improves the shielding performance of the lower end of a lifting fire door that partitions a lift room and a boarding room.

The technology described in Patent Document 1 focuses only on the shielding performance of the lower end of a hanging fire door, but it prevents fire from leaking from gaps between other movable parts, such as gaps between fire doors. This is not something that can be prevented, and issues remain in terms of fire resistance. Therefore, there is a possibility that the technology described in Patent Document 1 alone may not be able to sufficiently perform the function of, for example, specified fire prevention equipment.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fire door structure that can further improve flame resistance.

In order to solve the above problems, the present invention provides a fire door structure for a parking lot, which includes at least two doors that move in the same direction at different speeds, and that extends along the moving direction of the at least two doors. When the at least two doors are closed, the ends of the at least two doors are in contact with each other in a first phase jack structure extending along the width direction of the door, and the at least two doors are When the two doors are closed, the widthwise ends of at least two doors and the two vertical frames are in contact with each other through a second phase jack structure extending along the moving direction of the doors, and when the at least two doors are closed, When closed, the first phase jack structure and the second phase jack structure are continuous.

According to such a configuration, flame retardance can be ensured by the continuous first phase hollow structure and second phase hollow structure.

As described above, according to the present invention, flame retardancy is further improved.

1 is a schematic diagram of a mechanical parking lot to which a fire door structure according to an embodiment can be applied. It is a schematic diagram of a mechanical parking lot to which the same fire door structure can be applied. It is a perspective view of the same fire door structure. It is a perspective view of the same fire door structure. It is a perspective view of the door of the same fireproof structure. It is a perspective view of the door of the same fireproof structure. It is a sectional view of the door of the same fireproof structure. It is a side view of the same fire door structure. It is a partial perspective view of the three-sided frame of the fire door structure. It is an enlarged perspective view of the three-sided frame of the same fire door structure. 11 is a sectional view taken along the line 11-11 in FIG. 10. FIG. It is a front view of the fire door structure by a modification.

The fire door structure according to the embodiment relates to a fire door structure for a mechanical parking lot such as a building designated as a semi-fireproof building or a fireproof building. 1 and 2 are schematic diagrams of a mechanical parking lot to which a fire door structure according to an embodiment can be applied. In the example shown in FIG. 1, the mechanical parking lot has a first section R1 that serves as both a lift room and a boarding room, and a second section R2 where drivers and vehicles wait until the lift etc. are ready in the first section R1. have. In this example, the first section R1 is designated as a fire prevention section, the fire door structure 1 is provided between the first section R1 and the second section R2, and when a fire occurs in the first section R1, flames and Smoke is kept within the first section R1 for a certain period of time.

In the example shown in FIG. 2, the mechanical parking lot includes a first section R1 consisting of a lift room and a second section R2 consisting of a boarding room where a driver gets on and off the vehicle. A vehicle transport mechanism M is provided between the first section R1 and the second section R2. When the driver gets off the vehicle at the second section R2, the transport mechanism M transports the vehicle to the first section R1. In this example, the first section R1 is designated as a fire prevention section, the fire door structure 1 is provided between the first section R1 and the second section R2, and when a fire occurs in the first section R1, flames and Smoke is kept within the first section R1 for a certain period of time.

The fire door structure 1 according to this embodiment is applicable to any of the above examples.

The specific structure of the fireproof structure will be explained below. For convenience of explanation, a three-dimensional orthogonal coordinate system shown in each figure may be used for the configuration of each part. The X direction indicates the direction in which the vehicle moves from the second section R2 to the first section R1 when the fire door structure 1 is opened. The Y direction is a direction perpendicular to the X direction within the same horizontal plane as the X direction, and corresponds to the width direction of the opening when the fire door structure 1 is opened. The Z direction indicates upward in the vertical direction, and is also the direction in which the fire door structure 1 moves when the fire door structure 1 opens. In the example of FIG. 1, the vehicle waits in the second compartment R2 until the lift reaches the first compartment R1. When the lift arrives, the fire door structure 1 opens in the Z direction. Thereafter, the driver drives the vehicle to enter the first section R1 from the second section R2 in the X direction. Thereafter, the driver exits the vehicle, exits from the first section R1, and closes the fire door structure 1 in the -Z direction. Further, in the example shown in FIG. 2, the driver stops the vehicle at a predetermined position in the second section R2. The driver then exits the vehicle. In the mechanical parking lot, the fire door structure 1 is opened in the +Z direction, and the transport mechanism M is used to transport the vehicle from the second section R2 to the first section R1. After that, the mechanical parking lot closes the fire door structure 1 in the -Z direction.

In the above example, the fire door structure 1 is opened and closed in the vertical direction (±Z direction), but the fire door structure 1 may be opened and closed in the horizontal direction (±Y direction).

3 and 4 are perspective views of the fire door structure. More specifically, FIG. 3 shows the fire door structure 1 in a closed state, and FIG. 4 shows the fire door structure 1 in an open state. Note that this is a diagram for explaining the basic configuration of the fire door structure 1, and the interlocking structure for flame protection, which will be described later, as well as the door drive mechanism and the guide that regulates the door movement direction are omitted. .

As shown in FIGS. 3 and 4, the fire door structure 1 includes three doors 2A to 2C and a three-sided frame 4 that defines an opening for vehicle entry. In the following description, the three doors 2A to 2C may be collectively referred to as a door 2. The three doors 2A to 2C are so-called lifting type doors, and are moved in the ±Z direction by a lifting structure such as a wire connected to a drive source (not shown). Each of the doors 2A to 2C is a rectangular iron panel having its longitudinal direction in the Y direction. The doors 2A to 2C are arranged offset along the X axis, and arranged so as not to interfere with each other when the doors are moved in the Z direction. Also, when looking from the +X direction to the -X direction with each door 2A to 2C closed, the -Z direction end of the first door 2A at the top (the door closest to the +Z direction) and the middle door The ends of the second door 2B in the +Z direction partially overlap. Similarly, the -Z-direction end of the second door 2B and the +Z-direction end of the third door 2C at the bottom (the door furthest in the -Z direction) partially overlap.

Fireproofing is ensured by the first phase jack structure 6A between the three doors 2A to 2C, and the second phase jack structure is provided between the ends of the three doors 2A to 2C in the ±Y axis direction and the three-sided frame 4. Flame retardancy is ensured by the interlock structure 6B, and flame retardance is ensured by the third phase interlock structure 6C between the +Z direction end of the first door 2A and the three-sided frame 4.

The moving speeds of the three doors 2A to 2C are different, and if the moving speed of the first door 2A along the Z-axis is 1, the moving speed of the second door 2B along the Z-axis is 2. Yes, and the moving speed of the third door 2C along the Z axis is 3. By providing such a speed difference, all the doors 2A to 2C can be accommodated and deployed at substantially the same time, and the doors 2A to 2C can be smoothly opened and closed.

5 and 6 are perspective views of the door, and FIG. 7 is a sectional view of the door. Note that FIG. 7 is a sectional view taken along the line 7-7 in FIGS. 5 and 6. As shown in FIGS. 5 to 7, a male member 8 is provided on one main surface (the main surface facing the -X direction) of the door 2 (see FIG. 5). The male member 8 of the first door 2A located at the top serves as the male member 8 of the second phase jack structure 6B and the third phase jack structure 6C. The remaining male members 8 of the second door 2B and the third door 2C function as the male members 8 of the first phase jack structure 6A and the second phase jack structure 6B. The male member 8 extends near the long side of the door 2 in the +Z direction and near the two short sides, and has a substantially L-shaped cross section (see FIG. 7) over its entire length. More specifically, the male member 8 extends in the +X direction from the main surface of the door, bends at a right angle at the end in the +X direction, and extends toward the center of the door 2. Therefore, the male member 8 has a substantially L-shaped portion in both the XZ cross section and the XY cross section.

Of the male member 8, a portion 8A having a substantially L-shape in the XZ cross section functions as a male member of the first phase jack structure 6A or the third phase jack structure 6C extending along the Y axis. More specifically, a portion 8A of the male member 8 of the first door 2A having a substantially L-shape in the XZ cross section functions as a male member of the third phase jack structure 6C. Furthermore, a portion 8A of the male member 8 of the second door 2B and the third door 2C, which has a substantially L-shape in the XZ cross section, functions as a male member of the first phase jack structure 6A. The male member of the first phase jack structure 6A or the third phase jack structure 6C is arranged near the long side of the main surface of the door in the +Z direction, that is, near the end of the door 2 in the +Z direction.

Further, a portion 8B of the male member 8 having a substantially L-shape in the XY cross section functions as a male member of the second phase jack structure 6B. The male member 8 of the second phase jack structure 6B is connected to the portion 8A of the male member 8 of the first phase jack structure 6A or the third phase jack structure 6C near the ends of the main surface of the door 2 in the ±Y direction. , extends to the -Z direction end of the main surface. The male member 8 (8A) of the first phase jack structure 6A or the third phase jack structure 6C and the male member 8 (8B) of the second phase jack structure 6B are continuous and do not discontinue at the intersection. . It is preferable that a flange portion 10 extending in the -X direction is formed at the tip of the male member 8.

The female member 12 of the first phase jack structure 6A is provided on the other main surface of the door 2 (the main surface facing the +X direction) (see FIG. 6). The female member 12 of the first phase jack structure 6A is provided in the first door 2A and the second door 2B other than the third door 2C at the lowest stage. The female member 12 of the first phase jack structure 6A has a floor portion 12A extending in the +X direction from the other main surface of the door 2 when viewed from the Y direction, and a floor portion 12A extending in the +Z direction from the +X direction end of the floor portion 12A. It has a substantially L-shape with a wall portion 12B. The female member 12 receives the male member 8 from the +Z direction together with the other main surface. The length of the floor portion 12A along the Y-axis is shorter than the length of the wall portion 12B along the Y-axis and the length of the male member 8 along the Y-axis. Further, at both ends of the female member 12 in the ±Y direction, only the wall portion 12B is formed, and the floor portion 12A is not formed. A female member of a second phase jack structure 6B, which will be described later, is connected to the notch in which the floor portion 12A is not formed, and a female member 12 of the first phase jack structure 6A and a second phase jack structure 6B are connected to each other. The female member is continuous.

The third door 2C is not provided with a female member. It is preferable that a packing 14 that contacts the ground G is provided on the -Z direction end surface of the third door 2C. In order to suppress the airtightness from decreasing due to unevenness of the ground G, a receiving member such as a lintel plate is embedded, and the packing 14 and the lintel plate are brought into contact when the door is closed. This further improves the airtightness of the bottom.

Further, it is preferable that a packing 16 is formed on the floor portion 12A. The packing 16 has, for example, a rounded end in the +Z direction, and extends along the Y axis over the entire length of the floor portion 12A. The flange portion 10 of the male member 8 of the first phase jack structure 6A contacts the rounded portion of the packing 16. By bringing the flange portion 10, which has a length along the X-axis, into contact with the packing 16, the two can be brought into contact reliably even if the two are not precisely positioned.

In an embodiment in which the packing 16 is not provided on the floor portion 12A, a collapsible structure in which the tip of the male member 8 is brought into contact with the floor portion 12A of the female member 12 is used to connect the doors 2A to 2C or to the doors 2A to 2C from three sides. All you have to do is connect the frames 4. In either case, the doors 2A to 2C or the doors 2A to 2C and the three-sided frame 4 should be connected to each other without any gaps and in contact with each other to the extent that the flame resistance required for specified fire prevention equipment is satisfied. It is enough.

FIG. 8 is a side view of the fire door structure, and is a diagram for explaining the first phase jack structure and the third phase jack structure. As shown in FIG. 8, the three-sided frame 4 is provided with a female member 18 of the third phase jack structure 6C having the same shape as the female member 12 of the first phase jack structure 6A. When the door 2 is closed, the male member 8 of the first door 2A and the female member 18 of the third phase jack structure 6C are connected. Further, the male member 8 of the second door 2B is connected to the female member 12 of the first phase jack structure 6A of the first door 2A. Further, the male member 8 of the third door 2C is connected to the female member 12 of the first phase jack structure 6A of the second door 2B. In this way, by providing the male member 8 and female members 12 and 18 corresponding to adjacent members, and connecting the two, the structure extends along the Y axis between the doors 2 and between the door 2 and the three-sided frame 4. You can fill in the gaps.

FIG. 9 is a partial perspective view of the three-sided frame, partially exploded. FIG. 10 is an enlarged perspective view of the three-sided frame, and is a diagram for explaining the connection structure between the vertical frame and the upper frame. In addition, in FIG. 10, the wall portion of the third phase jack structure is shown by a broken line. Further, FIG. 11 is a cross-sectional view taken along the line 11-11 in FIG.

The three-sided frame 4 includes two vertical frames 20 extending in the +Z direction from the ground, and an upper frame 22 that connects the ends of the vertical frames 20 in the +Z direction. In FIG. 9, the upper frame is shown moved in the +Z direction.

As shown in FIGS. 9 and 10, the two vertical frames 20 have a plane symmetrical shape with respect to the XZ plane taken between them, and are arranged at a predetermined interval along the Y axis. . The vertical frame 20 arranged on the −Y side shown in the figure has a stepped side surface on the +X side when viewed along the Y axis, and has three step surfaces 24A to 24C facing the +Z direction. have. The step surface 24A is connected to the -Z direction surface of the upper frame 22 of the three-sided frame 4. Each of the step surfaces 24B to 24C receives the first to second doors 2A to 2B, respectively, when the door 2 is closed. On the −Y side end face of the vertical frame 20, female members 26 of the second phase jack structure 6B are formed as many as the number of doors. The female member 26 of the second phase jack structure 6B is a groove that starts from the step surface 24 and extends in the -Z direction to the height of the adjacent step surface 24. Female member 26 has dimensions that can receive male member 8B. The length of the female member 26 is approximately the same as the length of the male member 8B along the Z axis. Further, the packing 28 may be arranged within the female member 26. The packing 28 has, for example, a rounded portion facing outward of the female member 26, and extends along the Z-axis over the entire length of the female member 26. The flange portion 10 of the male member 8 of the second phase jack structure 6A contacts the rounded portion of the packing 28. By bringing the flange portion 10, which has a length along the Z-axis, into contact with the packing 28, the two can be brought into contact reliably even if the two are not precisely positioned.

The upper frame 22 includes the female member 18 of the third phase jack structure 6C described above. The female member 18 of the third phase jack structure 6C has a floor portion 18A extending in the +X direction from the other main surface of the door 2 when viewed from the Y direction, and a floor portion 18A extending in the +Z direction from the +X direction end of the floor portion 18A. It has a substantially L-shape with a wall portion 18B. The female member 18 receives the male member 8 of the first door 2A from the +Z direction together with the other main surface. The length of the floor portion 18A along the Y-axis is shorter than the length of the wall portion 18B along the Y-axis and the length of the male member 8 along the Y-axis. Further, at both ends of the female member 18 in the ±Y direction, only the wall portion 18B is formed, and the floor portion 18A is not formed. The female member 26 of the second phase jack structure 6B is connected to the part where the floor portion 18A is not formed, and the female member 18 of the third phase jack structure 6C and the female member of the second phase jack structure 6B are connected. 26 are consecutive.

Moreover, it is preferable that a packing 30 is formed on the floor portion 18A of the female member 18 of the third phase jack structure 6C. The packing 30 has, for example, a rounded end in the +Z direction, and extends along the Y-axis over the entire length of the floor portion 18A. The flange portion 10 of the male member 8 of the third phase jack structure 6C is pressed against the rounded portion of the packing 30.

As shown in FIGS. 10 and 11, when the vertical frame 20 and the upper frame 22 are connected, the opening on the +Z direction side of the female member 26 of the vertical frame 20 and the floor on the −Y direction side of the female member 18 of the upper frame The notch in which the portion 18A is not provided coincides with the notch. Thereby, the female members 18 and 26 are continuous with each other. Further, the male member 8, which is a continuous member, extends without interruption from the female member 18 of the third phase jack structure 6C to the female member 26 of the second phase jack structure. In this way, by connecting the female members 18, 26 and the male member 8 at the intersection of the second phase jack structure 6B and the third phase jack structure 6C, it is possible to appropriately The interlocking structure can be maintained.

The female member 12 of the first phase jack structure 6A also has the same shape as the female member 18 of the third phase jack structure. Therefore, the first phase gap structure 6A is also continuous with the second phase gap structure 6B by the same method. This allows the female members 12, 26 and the male member 8 to be continuous at the intersection of the first phase jack structure 6A and the second phase jack structure 6B, allowing for appropriate interlocking in a lifting type fire door structure with many movable parts. Can maintain structure.

As described above, according to the fire door structure 1 according to the present embodiment, the first phase jack structure 6A and the second phase jack structure 6B are continuous, and the second phase jack structure 6B and the third phase jack structure 6B are connected to each other. The jack structure 6C can be made continuous. As a result, in the lifting type fire door structure 1 with many moving parts, the gap between the door 2 and the three-sided frame 4 along the Z-axis, the gap between the doors 2 along the Y-axis, and the gap between the door 2 and the three-sided frame 4 can be appropriately reduced. Close properly.

This is particularly useful in the lifting type fire door structure 1 where smooth opening and closing of the door 2 is desired. In other words, in the lifting type fire door structure 1, there are many gaps between the plurality of lifting doors 2 and gaps between the three-sided frame 4 that defines the opening to the passenger compartment. Since the gaps extend in the Y-axis direction and the Z-axis direction, and are also shifted in the X-axis direction, it is necessary to close all these gaps while maintaining the smooth opening and closing of the door 2 by the lifting fire door structure 1. was difficult. In particular, mechanical parking lot doors may be opened and closed many times, so improving fire resistance while maintaining smoothness is a very important issue. According to this embodiment, without providing a fireproof shutter or the like separately from the door 2, the flame resistance can be improved while maintaining the smooth opening and closing of the door 2, and the requirements for specific fire prevention equipment can be met. Moreover, when the packings 16, 28, and 30 are used, the airtightness between them can be further improved by bringing the male member into contact with the packings.

FIG. 12 is a front view of a fire door structure according to a modified example. FIG. 12 is a view of the fire door structure 1 viewed from the +X direction to the -X direction, and only one door 2 and a part of the vertical frame 20 are shown for clarity. Further, in the figure, the tip of the male member provided on the door 2 side and the tip of the female member packing 28 provided on the vertical frame are indicated by broken lines L1 and L2, respectively. As shown in the figure, the tip of the male member 8 forming the second phase jack structure 6B and the tip of the packing provided on the female member 26 are inclined at the same angle with respect to the Z-axis. In the illustrated example, the male members 8 of the second phase pop-up structure 6B and the female members 26 of the second-phase pop-up structure 6B are inclined so as to be separated from each other in the −Z direction. By providing such an inclination, when the door 2 is moved in the -Z direction, the force applied to the packing 28 when the male member 8 comes into contact with the packing 28 is deflected. That is, when the male member 8 and the packing are brought into contact in parallel with the Z-axis, the male member 8 first contacts the +Z direction end of the packing 28 and a force acts in the direction of peeling the packing 28 from the bottom surface of the female member 26. . On the other hand, by inclining both, the flange surface 10 of the male member 8 and the tip of the packing 28 come into contact with each other substantially simultaneously over the entire length. This makes it possible to reduce the resistance caused by the packing 28 when the door 2 is opened and closed, prevent wear of the packing 28, and prevent the packing 28 from peeling off from the bottom surface of the female member 26.

As a method of inclining the tip of the packing 28 with respect to the Z-axis as shown by the broken line L2, the female member 26 may be inclined with respect to the Z-axis, or the thickness of the packing 28 (dimension along the Y-axis) may be gradually increased in the -Z direction.

In the embodiment described above, the packings 16, 28, 30 of the first to third phase jack structures 6A to 6C are provided on the bottom surface of the female member 26, but the packings 16, 28, 30 are provided at the tip of the male member 8. In particular, the packings 16, 28, 30 may be provided on the flange surface 10 so that the tips of the packings 16, 28, 30 come into contact with the bottom surfaces of the female members 12, 18, 26 when the door 2 is closed. However, if the gaskets 16, 28, 30 are provided on the female members 12, 18, 26 side, the gaskets 16, 28, 30 can be replaced more easily. When the packings 16, 28, 30 are provided on the female member side 12, 18, 26, the packings 16, 28, 30 of the second phase jack structure 6B are provided on the vertical frame 20 side. As described above, the packing 28 of the second phase jack structure 6B is more easily loaded than the packings 16 and 30 of the other phase jack structures 6A and 6C. Therefore, if the packing 28 is provided in the vertical frame, the packing 28 in the vertical frame can be easily accessed by simply opening the door 2, and replacement work can be performed more easily.

Note that the configurations of the above-described embodiments and modifications thereof can be modified as appropriate without departing from the spirit of the present invention.

Generalizing the above-described embodiments and modifications leads to the following aspects.

[Aspect 1]
A fire door structure for a parking lot,
at least two doors moving in the same direction at different speeds;
and two vertical frames extending along the moving direction of the at least two doors,
When the at least two doors are closed, the ends of the at least two doors are in contact with each other in a first phase jack structure extending along the width direction of the door,
When the at least two doors are closed, the widthwise ends of the at least two doors and the two vertical frames are in contact with each other in a second phase jack structure extending along the moving direction of the doors,
A fire door structure in which the first phase jack structure and the second phase jack structure are continuous when the at least two doors are closed.

According to such a configuration, the flame resistance of the fire door can be improved.

[Aspect 2]
The two vertical frames are connected by an upper frame, and the upper end of the door on the upper frame side of the at least two doors is in contact with the upper frame in a third phase jack structure, and the upper frame is in contact with the upper end of the door on the upper frame side, and The fire door structure according to aspect 1, wherein the three-phase jack structure and the second phase jack structure are continuous.

According to such a configuration, the flame resistance of the door and the upper frame can be improved.

[Aspect 3]
The second phase jack structure is formed of a male member formed on the door side and extending in the moving direction of the door, and a female member formed on the vertical frame side and extending in the moving direction of the door to receive the male member. The fire door structure according to aspect 1 or 2, further comprising a packing in which the female member and the male member are in contact with each other.

According to such a configuration, the gas-tightness between the male member and the female member can be improved by the packing. Further, by providing the packing on the female member, the packing can be easily replaced.

[Aspect 4]
The fire door structure according to aspect 3, wherein the male member includes a flange that contacts the packing.

With this configuration, the male member can be reliably brought into contact with the packing.

[Aspect 5]
The fire door structure according to aspect 3 or 4, wherein the packing and the male member extend obliquely at the same angle with respect to the moving direction of the door.

According to this configuration, it is possible to reduce the resistance caused by the packing when closing the door, prevent wear of the packing, and suppress peeling of the packing.

1 Fire door structure, 2 Door, 6A 1st phase jack structure, 6B 2nd phase jack structure, 6C 3rd phase jack structure, 8 Male member, 12 Female member, 14, 16 Packing, 18 Female member, 20 Vertical frame , 22 Upper frame, 26 Female member, 28, 30 Packing.

Claims (5)

A fire door structure for a parking lot,
at least two doors moving in the same direction at different speeds;
and two vertical frames extending along the moving direction of the at least two doors,
When the at least two doors are closed, the ends of the at least two doors are in contact with each other in a first phase jack structure extending along the width direction of the door,
When the at least two doors are closed, the widthwise ends of the at least two doors and the two vertical frames are in contact with each other in a second phase jack structure extending along the moving direction of the doors,
A fire door structure in which the first phase jack structure and the second phase jack structure are continuous when the at least two doors are closed. The two vertical frames are connected by an upper frame, and the upper end of the door on the upper frame side of the at least two doors is in contact with the upper frame in a third phase jack structure, and the upper frame is in contact with the upper end of the door on the upper frame side, and The fire door structure according to claim 1, wherein the three-phase jack structure and the second phase jack structure are continuous. The second phase jack structure is formed of a male member formed on the door side and extending in the moving direction of the door, and a female member formed on the vertical frame side and extending in the moving direction of the door to receive the male member. is,
The fire door structure according to claim 1 or 2, further comprising a packing that contacts the female member and the male member. The fire door structure according to claim 3, wherein the male member includes a flange that contacts the packing. The fire door structure according to claim 3 or 4, wherein the packing and the male member extend obliquely at the same angle with respect to the moving direction of the door.

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