A double-opening door with a smoke-blocking structure, and a mechanical parking system using the same.

Abstract

To provide a double-sided door having smoke-blocking structure that does not require a moving element for pressing a door against a jamb and exhibits smoke-blocking performance with a simple configuration.SOLUTION: A double-sided door 12 having smoke-blocking structure, i.e., the double-sided door 12 is provided with smoke-blocking structure on at least two doors 4 that can be opened / closed in both lateral directions relative to a jamb 2 and a threshold 3. The double-sided door includes: a first airtight section 6 that closes a gap between the top of the door 4 and an upper frame 21 of the jamb 2; a second airtight section 7 that closes a gap between the bottom of the door 4 and the threshold 3; a third airtight section 8 that closes a gap between the ends of an end side 45A of the door 4; a fourth airtight section 9 that closes a gap between the end of the end side 45A of the door 4 and a vertical frame 22 of the jamb 2; a fifth airtight section 10 that closes a gap between the end of the end side 45A of the door 4 and the upper frame 21 of the jamb 2; and a sixth airtight section 11 that closes a gap between the end sides 45A of the door 4 at the butt joints.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a double-swing door having a smoke-blocking structure and a mechanical parking device using the same.

Background Art

[0002] Patent Document 1 describes a fire door structure for a parking lot, which includes at least two doors that move in the same direction at different speeds, and two rigid 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 contact each other with a first overlapping structure extending along the width direction of the door. When the at least two doors are closed, the width-direction ends of the at least two doors and the two rigid frames contact each other with a second overlapping structure extending along the moving direction of the door. When the at least two doors are closed, the first overlapping structure and the second overlapping structure are continuous.

[0003] Patent Document 2 describes a smoke-blocking structure for an automatic door, which includes a sliding body fitted to a door rail for moving a door material of the automatic door in the vertical direction, a support member having one end connected to the sliding body movably in the front-rear direction and the other end fixed to the side surface of the door material and provided with a protruding portion on the rear surface, and a cam attached to the rear side of the door rail so as to push the protruding portion forward when the support member passes through a predetermined position. When the automatic door is closed, the protruding portion is pushed by the cam, and the door material is pressed so as to close a gap between the door material and a frame material of the automatic door. The support member has a front contact plate extending to the sliding body and suppressing movement behind the sliding body, and an elastic body for aligning the front-rear positions of the support member and the sliding body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] However, the fire door structure described in Patent Document 1 attempts to achieve fire protection by using a rabbet structure that extends along the width direction of the door at the edges of the door when the door is closed, and is not a structure intended to block smoke.

[0006] Furthermore, the smoke-blocking structure described in Patent Document 2 is of a type in which the door panel of an automatic door is opened and closed vertically. A support member having a movable protrusion is provided on the side of the door panel, and when the door panel is closed, the protrusion moves to press the door panel against the three-sided frame. The structure is such that the door panel moves and presses against the three-sided frame each time the door panel is closed, and the support member having the protrusion is an essential component as a moving element of the door panel.

[0007] The present invention aims to provide a double-opening door with a smoke-blocking structure that eliminates the need for a moving element to press the door against the three-sided frame and exhibits smoke-blocking performance with a simple structure. [Means for solving the problem]

[0008] The double-opening door with a smoke-blocking structure according to the first embodiment is a double-opening door having a smoke-blocking structure on at least two doors that can be opened and closed in both lateral directions relative to the three-sided frame and the sill, A first airtight seal that closes the gap between the top of the door and the top frame of the three-sided frame, A second airtight seal that closes the gap between the lower part of the door and the threshold, A third airtight seal that closes the gap between the end faces of the aforementioned door, A fourth airtight section that seals the gap between the end of the door on the gable side and the vertical frame of the three-sided frame, A fifth airtight section that seals the gap between the end of the door on the gable side and the upper frame of the three-sided frame, A sixth airtight section that seals the gap between the end faces of the abutting portions of the aforementioned doors,The sixth airtight part comprises a convex resin member formed by a first abutting plane provided on one end of the door where the two doors abut against each other, a recess formed in the longitudinal direction of the first abutting plane, a second abutting plane provided on the other end of the door and in contact with the first abutting plane, a convex portion that protrudes greater than the depth dimension of the recess and is convex opposite the recess, and grooves formed at the base portions on both sides along the longitudinal direction of the convex portion, and when the door is closed, the first abutting plane and the second abutting plane are in contact, and the convex portion acts to narrow the grooves in the recess, causing the tip of the convex portion to be crushed and to make a tight seal.

[0009] The double-opening door having a smoke-blocking structure according to the second embodiment is configured such that, in the double-opening door having a smoke-blocking structure according to the first embodiment, the first airtight portion includes a biasing member fixed to the upper frame facing the surface of the door and biasing toward the door, and a first airtight member fixed to the free end of the biasing member and in contact with the surface of the door.

[0010] A double-opening door having a smoke-blocking structure according to the third embodiment is configured such that, in a double-opening door having a smoke-blocking structure according to the first embodiment, the second airtight part includes an airtight rail fixed to the sill along the opening and closing direction of the door, a biasing member fixed to the lower part of the door and biasing toward the airtight rail, and a second airtight member fixed to the free end of the biasing member and in contact with the airtight rail.

[0011] The double-opening door having a smoke-blocking structure according to the fourth embodiment is configured such that, in the double-opening door having a smoke-blocking structure according to the first embodiment, the third airtight part includes a third airtight member located inside one of the doors and facing the opening direction of the other door, and an airtight plate fixed to the gable end of the other door and in contact with the third airtight member, and when the door is closed, the third airtight member and the airtight plate come into contact.

[0012] The double-opening door having a smoke-blocking structure according to the fifth embodiment is a double-opening door having a smoke-blocking structure according to the first embodiment, wherein the fourth airtight part comprises a fourth airtight member fixed to one of the vertical frames facing the closing direction of the door, and an airtight material fixed to the end of the door facing the opening direction and facing the closing direction of the door, and when the door is closed, the fourth airtight member and the airtight material come into contact.

[0013] The double-opening door having a smoke-blocking structure according to the sixth embodiment is configured such that, in the double-opening door having a smoke-blocking structure according to the first embodiment, the fourth airtight portion includes a fourth airtight member fixed to one of the vertical frames and the other vertical frame opposite to it, facing in the direction of opening the door, and a surface of the end on the gable side facing in the direction of closing the door, and when the door is closed, the fourth airtight member and the surface of the end on the gable side come into contact.

[0014] The double-opening door having a smoke-blocking structure according to the seventh embodiment is configured such that, in the double-opening door having a smoke-blocking structure according to the first embodiment, the fifth airtight part includes an opposing plate fixed to the upper frame of the three-sided frame at a position facing the end surface of one end of the door, and a fifth airtight member fixed to the opposing plate facing the end surface of the end, and when the door is closed, the fifth airtight member and the end surface of one end come into contact.

[0016] The 8 The mechanical parking system according to the embodiment comprises a passenger compartment through which a vehicle moves in and out, a storage compartment through which the vehicle moves between the passenger compartment and the storage compartment, and a first embodiment to the third embodiment installed at the entrance to the passenger compartment. 7 It comprises a double-opening door having a smoke-blocking structure according to any one of the embodiments. [Effects of the Invention]

[0017] According to the double-opening door with a smoke-blocking structure of the first embodiment, compared to a door that is moved and pressed against a three-sided frame, the airtightness of the double-opening door is ensured and the smoke-blocking effect is achieved by simply closing the door.

[0018] According to the second embodiment of the double-opening door with a smoke-blocking structure, compared to a door that is moved and pressed against a three-sided frame, the airtightness of the upper part of the double-opening door is ensured by the operation of closing the door alone, thereby providing a smoke-blocking effect.

[0019] In the case of a double-opening door with a smoke-blocking structure according to the third embodiment, compared to a door that is moved and pressed against a three-sided frame, the airtightness of the lower part of the double-opening door is ensured by the operation of closing the door alone, thereby providing a smoke-blocking effect.

[0020] According to the double side-opening door having a smoke-blocking structure according to the fourth aspect, compared with moving the door and pressing it against the triple frame, airtightness between the doors of the side-opening doors is ensured and a smoke-blocking effect is exhibited by only the operation of closing the door.

[0021] According to the double side-opening door having a smoke-blocking structure according to the fifth aspect, compared with moving the door and pressing it against the triple frame, airtightness between the vertical frames of the triple frame and the doors at both ends of the side-opening doors is ensured and a smoke-blocking effect is exhibited by only the operation of closing the door.

[0022] According to the double side-opening door having a smoke-blocking structure according to the sixth aspect, compared with moving the door and pressing it against the triple frame, airtightness between the vertical frames of the triple frame and the doors at both ends of the side-opening doors is ensured and a smoke-blocking effect is exhibited by only the operation of closing the door.

[0023] According to the double side-opening door having a smoke-blocking structure according to the seventh aspect, compared with moving the door and pressing it against the triple frame, airtightness of the side portion in the opening direction of the doors excluding the door on the closing end side of the side-opening doors is ensured and a smoke-blocking effect is exhibited by only the operation of closing the door.

[0025] The 8 According to the mechanical parking device according to the aspect, airtightness of the entrance / exit door of the passenger compartment where the vehicle moves forward and backward is ensured and a smoke-blocking effect is exhibited. Further, even if a fire extinguishing facility is activated in the garage where the mechanical parking device is installed and a halon agent or nitrogen or carbon dioxide is released, leakage of the halon agent or nitrogen or carbon dioxide from the double side-opening doors is suppressed.

Brief Description of Drawings

[0026] [Figure 1] It is a front view showing the double side-opening door according to the present embodiment. [Figure 2] It is a rear view showing the double side-opening door according to the present embodiment. [Figure 3] It is a plan view showing the double side-opening door according to the present embodiment. [Figure 4] It is a side cross-sectional view showing the double side-opening door according to the present embodiment. [Figure 5] It is an upper side cross-sectional view showing the double side-opening door according to the present embodiment. [Figure 6] This is a lower side cross-sectional view showing the double side-opening doors according to this embodiment. [Figure 7] This is an enlarged side cross-sectional view showing the first airtight section in Figure 5. [Figure 8] This is an enlarged perspective view showing the first airtight section in Figure 7. [Figure 9] This is an enlarged side cross-sectional view showing the second airtight section in Figure 6. [Figure 10] Figure 9 is an enlarged perspective view showing the second airtight section. [Figure 11] This is an enlarged plan view showing the third airtight section formed by the doors in this embodiment. [Figure 12] This is an enlarged plan view showing the fourth airtight section, which is composed of the first door and the vertical frame of the three-sided frame in this embodiment. [Figure 13] This is an enlarged plan view showing the fifth airtight section, which consists of the upper frame of the three-sided frame and each door, in this embodiment. [Figure 14] This is an enlarged cross-sectional view showing the silicone rubber packing in this embodiment. [Figure 15] This is a partially enlarged perspective view showing the upper side of the concave rubber side of the airtight butt joint in this embodiment. [Figure 16] This is a partially enlarged perspective view showing the lower side of the concave rubber side of the airtight butt joint in this embodiment. [Figure 17] This is a partially enlarged perspective view showing the upper side of the convex rubber side of the airtight butt joint in this embodiment. [Figure 18] This is a partially enlarged perspective view showing the lower side of the convex rubber side of the airtight butt joint in this embodiment. [Figure 19] This is a plan view showing the state in which the airtight seal of the butt joint in this embodiment is formed by the contact between the concave rubber and the convex rubber. [Figure 20] This is a plan view of the concave rubber and convex rubber in this embodiment, where (a) shows the butt joint state and (b) shows the open state. [Modes for carrying out the invention]

[0027] [Embodiment] An example of a double-opening door with a smoke-blocking structure according to this embodiment, and a mechanical parking system using the same, will be described with reference to the drawings. In the diagram, arrow W indicates the door width direction, arrow D indicates the door depth direction, and arrow H indicates the door height direction. The direction of the door width direction W may be referred to as the horizontal direction, right, right side, or right direction; the opposite direction of the door width direction W may be referred to as the horizontal direction, left, left side, or left direction; the part viewed from the side in the door depth direction W may be referred to as the front surface, or the part viewed from the opposite side may be referred to as the back surface or rear surface; the direction of the door height direction H may be referred to as the top, above, or upper side, or the view from above may be referred to as the plan view, or the opposite direction of the door height direction H may be referred to as the bottom, below, or lower side.

[0028] <Overall configuration of the side-opening door> As shown in Figures 1 to 3, the double-opening door 12 having a smoke-blocking structure according to this embodiment is configured as an automatic door, and the automatic door 12 is installed at the entrance 1. Specifically, a three-sided frame 2 and a sill 3 are fixed to the opening of the building structure 1A of the entrance 1, and multiple doors are installed on the three-sided frame 2 and the sill 3 so as to be able to open and close along the door width direction W, on the left and right sides respectively. In this embodiment, the multiple doors are described as a total of four doors that open and close two to the left and two to the right from the center, but the opening and closing position is not limited to the center, and there may also be double-opening doors with an irregular number of doors, such as two double-opening doors or one door on one side and two on the other. Furthermore, it may be a manual type without a drive unit. Here, the automatic door 12 is an example of a double-opening door.

[0029] The three-sided frame 2 includes an upper frame 21 extending along the door width direction W at the top of the door in the door height direction H, and a pair of vertical frames 22 connected to both ends of the upper frame 21 in the door width direction W and extending along the door height direction H. Below the door height direction H of the three-sided frame 2, a sill 3 is provided, connected to the pair of vertical frames 22 and extending along the door width direction W. As a result, the opening of the entrance 1 is closed by the three-sided frame 2, the sill 3, and the four doors. Here, the automatic door 12 is an example of a double-opening door.

[0030] The automatic door 12 is provided with a drive unit 50 that opens and closes the door along the door width direction W on the side of the three-sided frame 2 in the door depth direction D, which is on the back surface of the building structure 1A. As shown in Figure 2, the drive unit 50 is provided on the outer circumference of the three-sided frame 2, with structures 52 rising along the door height direction H on both sides in the door width direction W, and two rails 54 (see Figure 4) corresponding to the four doors are provided on the upper part of the structures 52 along the door width direction W, with each door suspended from the individual rails 54.

[0031] [door] As shown in Figure 1, the automatic door 12 in this embodiment is described as a double-opening door that opens and closes in pairs to the left and right, with the first door 40, second door 41, third door 42, and fourth door 43 provided in the door width direction W. In this embodiment, the central part of the automatic door 12 is in the closing direction in the door width direction W, and the direction opposite to this is the opening direction of the automatic door 12. When the door 4 opens, the four doors open and close horizontally so that they are hidden on the left and right sides of the vertical frames 22 on both sides in the door width direction W. The opening and closing speeds are slow for the first door 40 and fourth door 43, and faster for the second door 41 and third door 42, and they open and close synchronously. The safety edge 49 shown in Figure 3 has the function of stopping the door 4, reversing it and driving it in the opening direction if a person or luggage hits it during the closing operation of the door 4.

[0032] As shown in Figure 4, each of the first door 40, second door 41, third door 42, and fourth door 43 has a suspension member 47 fixed at the top in the door height direction H, and rollers 48 are provided on the upper and lower parts of the suspension member 47. The upper roller 48 is rotatably supported on the upper surface of the rail 54 and supports the door so that it can be opened and closed laterally. The lower roller 48 contacts the lower surface of the rail 54 and suppresses vertical movement in the door height direction H.

[0033] [Three-sided frame] The pair of vertical frames 22 of the three-sided frame 2 are symmetrical in the door depth direction D, with the same dimensions on the side of the first door 40 and the side of the fourth door 43 in the door width direction W, in accordance with the opening and closing positions of the four doors shown in Figure 3. Furthermore, although not shown, the upper frame 21 of the three-sided frame is formed in a stepped shape when viewed from the door height direction H, in accordance with the opening and closing positions of the four doors. In other words, it is formed in a stepped shape to match the step formed on the end of the first door 40 on the door width direction W side and on the end of the second door 41 on the door width direction W side. The same applies to the upper frame 21 of the three-sided frame 2 for the third door 42 and the fourth door 43.

[0034] Furthermore, as shown in Figure 5, the upper frame 21 of the three-sided frame 2 has a raised portion 211 that is bent in the door height direction H at the end in the door depth direction D. The side of the upper frame 21 facing the building structure 1A is closed by a finishing member 25 that fills the gap between the upper frame 21 and the building structure 1A, and this finishing member 25 also creates an airtight seal between the three-sided frame 2 and the building structure 1A. This finishing member 25 also closes the gap between the vertical frame 22 and the building structure 1A in a similar airtight manner.

[0035] [threshold] As shown in Figure 6, the threshold 3 is embedded so as to be flush with the floor surface L1 of the building structure 1A. On the surface of the threshold 3 in the door height direction H, rails 31 are fixed along the door width direction W, each having a cross-section corresponding to the door depth direction D and the door height direction H, corresponding to the first door 40 and the fourth door 43, and the second door 41 and the third door 42, respectively, and having a length corresponding to the opening and closing position of each door. Downward-facing recesses formed on guide shoes 46 provided at the lower part of the door height direction H of the first door 40, second door 41, third door 42, and fourth door 43 are slidably engaged with each rail 31.

[0036] Furthermore, on the surface of the threshold 3 in the door height direction H, two airtight rails 74, which are part of the second airtight section 7 described later, are fixed parallel to the rails 31 and along the door width direction W, with cross-sections having dimensions in the door depth direction D and the door height direction H, respectively, corresponding to the first door 41 and the fourth door 43, and the second door 41 and the third door 42.

[0037] <Structure of the main parts> Next, the smoke-blocking structure according to this embodiment will be described with reference to Figures 4 to 15.

[0038] [First airtight section] As shown in Figures 4, 5, 7, and 8, the first airtight section 6 is constructed by including a leaf spring 62 fixed to the upper frame 21, facing a smooth-surfaced airtight plate 61 fixed to the respective surfaces 45 of the first door 40, second door 41, third door 42, and fourth door 43, and biasing toward each airtight plate 61; and a synthetic resin plate 63 fixed to the free end of the leaf spring 62 and in contact with each airtight plate 61. Here, the leaf spring 62 is an example of a biasing member, and the synthetic resin plate 63 is an example of a first airtight member. Furthermore, the synthetic resin plate 63 is made of Teflon®.

[0039] In this embodiment, a double-opening door is constructed using four doors: the first door 40, the second door 41, the third door 42, and the fourth door 43. Each of the four doors 4 has a first airtight section 6, but since they all have the same structure, only the first door 40 will be described.

[0040] Specifically, as shown in Figures 7 and 8, the first airtight section 6 has a spacer 64 fixed along the door width direction W of the door, extending to the surface of the door in the door depth direction D of the rising section 211, which is bent from the end of the three-sided frame 2 in the door depth direction D toward the door height direction H. The upper part of a leaf spring 62, which has a predetermined dimension in the door height direction H and extends to a length corresponding to the entire width of the door in the door width direction W of the first door 40, is fixed along the door width direction W of the spacer 64. Furthermore, a synthetic resin plate 63 is fixed to the surface of the leaf spring 62 that is the free end and faces the door depth direction, and which contacts an airtight plate 61 fixed to the surface 45 of the first door 40. In this embodiment, an airtight plate 61 is provided over the entire width W of the first door 40 to improve the smoothness of the contact surface, and the synthetic resin plate 63 is pressed against the surface of the airtight plate 61 by the biasing force of the leaf spring 62 and comes into contact with it. However, the airtight plate 61 does not need to be provided if the surface 45 of the first door 40 is finished to a degree that allows it to exhibit airtightness.

[0041] [Second airtight section] As shown in Figures 4, 6, 9, and 10, the second airtight section 7 is composed of an airtight rail 74 fixed along the opening and closing direction of the first door 40, the fourth door 43, or the second door 41 and the third door 42 of the sill 3, a leaf spring 71 fixed to the lower part of each of the first door 40 to the fourth door 43 and biasing toward the airtight rail 74, and a synthetic resin plate 72 fixed to the free end of the leaf spring 71 and in contact with the airtight rail 74. Here, the leaf spring 71 is an example of a biasing member, and the synthetic resin plate 72 is an example of a second airtight member. Furthermore, the synthetic resin plate 72 is made of Teflon®.

[0042] In this embodiment, a double-opening door is constructed using four doors: the first door 40, the second door 41, the third door 42, and the fourth door 43. Each of the four doors 4 has a second airtight section 7, but since they all have the same structure, only the first door 40 will be described.

[0043] As shown in Figures 9 and 10, the second airtight section 7 seals the gap between the bottom of the first door 40 and the sill 3. Specifically, below the frame member 44 fixed to the inner surface 45B of the first door 40, the bottom of the first door 40 is open toward the sill 3, and a guide shoe 46 is positioned to be guided along the door width direction W on the rail 31 of the sill 3. The second airtight section 7 is located below the first door 40, sandwiched between the inner surface 45B and the guide shoe 46.

[0044] Specifically, the second airtight section 7 has a spacer 73 fixed to the inner surface 45B below the first door 40, and the upper side of a leaf spring 71 is attached to the side of the spacer 73 on the door depth direction D side. A synthetic resin plate 72 is fixed to the side of the free end of the lower side of the leaf spring 71 that is opposite to the door depth direction D, i.e., the side facing the inner surface 45B of the door 41. The leaf spring 71 and the synthetic resin plate 72 have a length that extends over the entire width direction W of the first door 40. On the other hand, an airtight rail 74 is fixed to the upper surface of the sill 3, with the side of the synthetic resin plate 72 opposite to the door depth direction D in contact with it. The airtight rail 74 is provided over the entire range of movement of the first door 40 in the direction in which the first door 40 opens and closes. The leaf spring 71 applies a biasing force in the direction opposite to the door depth direction D, and the synthetic resin plate 72 is pressed against and in contact with the surface of the airtight rail 74 by the biasing force of the leaf spring 71.

[0045] [Third airtight section] The third airtight section 8 is located inside the first door 40 or the fourth door 43 and includes a silicone rubber packing 82 facing the opening direction in the second door 41 corresponding to the first door 40 or the third door 42 corresponding to the fourth door 43, and a bracket 83 fixed to the end of the gable side 45A of the second door 41 or the third door 42 and in contact with the silicone rubber packing 82. When the door is closed, the silicone rubber packing 82 and the bracket 83 come into contact. Here, the silicone rubber packing 82 is an example of the third airtight member, and the bracket 83 is an example of an airtight plate.

[0046] In this embodiment, as shown in Figure 3, a double-opening door is constructed using four doors: a first door 40, a second door 41, a third door 42, and a fourth door 43. Each of the four doors has a third airtight section 8 between the first door 40 and the second door 41, and between the fourth door 43 and the third door 42. Although symmetrical, all sections have the same structure, so we will explain the structure between the first door 40 and the second door 41.

[0047] As shown in Figure 11, the third airtight section 8 is located between the first door 40 and the second door 41 and is provided along the door height direction H.

[0048] Specifically, on the inside of the end door 45A on the door width direction W of the first door 40, a bracket 81 facing the opposite side of the door width direction W, i.e., the opening direction of the first door 40, is fixed to the folded portion on the back side of the end door 45A in the door depth direction D. A flexible silicone rubber packing 82 is fixed to the surface of the bracket 81 facing the opposite side of the door width direction W, over the entire door height direction H. The silicone rubber packing 82 will be described later.

[0049] On the other hand, the second door 41 has a bracket 83 provided on the surface of the gable end 45A on the opposite side of the door width direction W, extending over the entire length of the door height direction H. The bracket 83 is fixed to the surface of the gable end 45A of the second door 42 and includes a base material 83A having a member bent to extend in a direction along the door width direction W, and an airtight material 83B attached to the bent portion of the base material 83A so as to be position-adjustable relative to the base material 83A in the door width direction W. In this embodiment, the bent portion of the base material 83A has an elongated hole (not shown) in a direction along the door width direction W, and the portion of the airtight material 83B that contacts the base material 83A is tapped, and the airtight material 83B is fixed to the base material 83A with bolts so as to be position-adjustable. On the opposite side of the side to which the airtight material 83B is fixed, there is an airtight surface 84 that is pressed against and contacts the silicone rubber packing 82 provided on the first door 40. This allows for adjustment of the degree of contact between the airtight surface 84 and the silicone rubber packing 82.

[0050] [Fourth airtight section] As shown in Figure 3, the fourth airtight section 9 is provided in two locations: between the first door 40 and the vertical frame 22 on the side of the three-sided frame 2 facing the first door 40, and between the fourth door 43 and the vertical frame 22 on the side of the three-sided frame 2 facing the fourth door 43. The two fourth airtight sections 9 are symmetrical but have the same structure, so the structure between the first door 40 and the vertical frame 22 on the side of the three-sided frame 2 facing the first door 40 will be described.

[0051] As shown in Figure 12, the fourth airtight section on the side of the first door 40 includes a silicone rubber packing 92 fixed to the vertical frame 22 on the side of the first door 40, which is one of the vertical frames, facing the opening direction of the first door 40 (opposite to the door width direction W). When the door is closed, the silicone rubber packing 92 comes into contact with a bracket 93 fixed to the end 45A of the first door 41 and facing the closing direction. Here, the silicone rubber packing 92 is an example of the fourth airtight member, and the bracket 93 is an example of an airtight material.

[0052] Specifically, as shown in Figure 12, on the vertical frame 22 on the side of the first door 40, a bracket 91 having a surface facing the opposite side of the door width direction W is fixed to the side of the vertical frame 22 in the door depth direction D, and a silicone rubber packing 92 facing the opposite side of the door width direction W is provided on the bracket 91. The bracket 91 and the silicone rubber packing 92 are provided over the entire door height direction H of the first door 40.

[0053] On the other hand, a bracket 93 is attached to the surface of the gable end 45A facing the opposite side of the door width direction W of the first door 40, extending over the entire door height direction H of the first door 40. In this embodiment, the bracket 93 is fixed to the surface of the gable end 45A facing the opposite side of the door width direction W of the first door 40 and includes a base material 93A having a member bent to extend in a direction along the door width direction W, and an airtight material 93B attached to the bent portion of the base material 93A so as to be position-adjustable relative to the base material 93A in the door width direction W. In this embodiment, an elongated hole (not shown) is provided in the bent portion of the base material 93A in a direction along the door width direction W, and a tap is cut into the portion of the airtight material 93B that contacts the base material 93A, and the airtight material 93B is fixed to the base material 93A with bolts so as to be position-adjustable. On the side opposite to the side where the airtight seal 93B is fixed, there is an airtight surface 94 that is pressed against and in contact with the silicone rubber packing 92 provided on the vertical frame 22. This allows the degree of airtightness between the airtight surface 94 and the silicone rubber packing 92 to be adjusted.

[0054] [Fifth airtight section] The fifth airtight section 10 includes an opposing plate 101 fixed to the upper frame 21 of the three-sided frame 2 at a position facing the end of one end gable 45A of the door, and a silicone plate 102 fixed facing the end of the end gable 45A of the opposing plate 101. When the door is closed, the silicone plate 102 and the end of one end gable 45A come into contact. Here, the silicone plate 102 is an example of the fifth airtight member.

[0055] Specifically, as shown in Figure 3, the fifth airtight section 10 is the portion where the first door 40 and the second door 41 overlap in the door depth direction D, and the portion where the fourth door 43 and the third door 42 overlap in the door depth direction D. In the portion where the raised portion 211 of the upper frame 21 of the three-sided frame 2 shown in Figures 5 and 7 is formed in a stepped shape in plan view along the respective surfaces 45 of the first door 40 and the fourth door 43, as shown in Figure 13, opposing plates 101 are provided in a direction along the door depth direction D so as to connect the respective raised portions 211. The two fifth airtight sections 10 described above are symmetrical but have the same structure, so the structure on the side of the first door 40 will be described.

[0056] The opposing plate 101 has the same length dimension as the rising portion 211 in the door height direction H and is airtightly fixed to each rising portion 211. In this embodiment, the opposing plate 101 is welded to each rising portion 211. As a result, when the first door 40 is closed along the door width direction W, the surface of the end 45A of the first door 40 is in close contact with the silicone plate 102. As a result, the entire upper end of the first door 40 becomes airtight.

[0057] Figure 14 shows the silicone rubber packings 82 or 92 used in the third to fifth airtight sections. Since the silicone rubber packings 82 and 92 have the same structure, only the silicone rubber packing 82 will be described here.

[0058] As shown in Figure 14, the silicone rubber packing 82 is composed of a base portion 82A on the bracket side, a straight portion 82C, and a contact portion 82B. The silicone rubber packing 82 as a whole is flexible and will bend along the door width direction W when pressure is applied in the door width direction W. The silicone rubber packing 82 has a number of holes (not shown) spaced apart along the door height direction H so that the base portion 82A can be fixed with bolts.

[0059] [Sixth airtight section] As shown in Figure 19, the sixth airtight section 11 is formed at the abutting joint between the doors when the second door 41 and the third door 42 are closed from both sides. The abutting joint is formed when a concave rubber 110 protruding in the door width direction W from the surface of the end side 45A of the second door 41 and a convex rubber 120 protruding opposite to the concave rubber 110 from the surface of the end side 45A of the third door 42 are in contact in a buttock state. At this time, both end sides 45A are not in contact. The concave rubber 110 and the convex rubber 120 have a length that is along the entire door height direction H of the second door 41 and the third door 42. Here, the concave rubber 110 is an example of a concave resin member, and the convex rubber 120 is an example of a convex resin member.

[0060] As shown in Figures 20 and 15, 16, the concave rubber 110 is a rubber-like material made of silicone synthetic resin, comprising a base portion 112, a first abutting surface 114, and a recess 116. The concave rubber 110 is positioned inside the end portion 45A of the second door 41 facing the third door 42, with the back surface of the base portion 112 being bonded and fixed to a reinforcing material 45C that reinforces the end portion 45A. In this state, the first abutting surface 114 and the recess 116 protrude from the surface of the end portion 45A. Also, as shown in Figure 16, synthetic resin plates 72 are provided on both sides of the lower part of the concave rubber 110 to seal the gap between the lower part of the second door 41 and the airtight rail 74.

[0061] As shown in Figures 20 and 17, 18, the convex rubber 120 is a rubber-like material made of silicone synthetic resin, comprising a base portion 122, a second abutting plane 124, a protrusion 126, and grooves 128 formed at the base portions on both sides of the longitudinal direction of the protrusion 126. The convex rubber 120 is positioned inside the end portion 45A of the third door 42, which faces the second door 41, with the back surface of the base portion 122 being bonded and fixed to a reinforcing material 45C that reinforces the end portion 45A. In this state, the second abutting plane 124 and the protrusion 126 protrude from the surface of the end portion 45A. Also, as shown in Figure 18, synthetic resin plates 72 are provided on both sides of the lower part of the convex rubber 120 to seal the gap between the lower part of the third door 42 and the airtight rail 74.

[0062] <Function of key parts> Next, we will explain the functions of the first to fifth airtight sections.

[0063] [Function of the first airtight section] As shown in Figures 7 and 8, the first airtight section 6 is biased to and in close contact with the surface 45 of the first door 40 or the airtight plate 61 by a synthetic resin plate 63 provided on the raised portion 211 of the three-sided frame 2 via a leaf spring 62. This state is the same for the second door 41, the third door 42, and the fourth door. As each door begins to close in the door width direction W, the synthetic resin plate 63 slides and comes into close contact with the surface of the airtight plate 61 of the first door 40, the second door 41, the third door 42, and the fourth door 43. When each door is closed, the surface of the synthetic resin plate 63 and the surface of the airtight plate 61 come into close contact over the entire door width direction W. As a result, the upper ends of the first door 40, the second door 41, the third door 42, and the fourth door 43 maintain an airtight state.

[0064] [Function of the second airtight seal] As shown in Figures 9 and 10, the second airtight section 7 is provided on the inner surface 45B of the first door 40, which is open downwards, via a leaf spring 71. The synthetic resin plate 72 is biased and in close contact with an airtight rail 74 fixed to the upward-facing surface of the sill 3. This state is the same for the second door 41, third door 42, and fourth door 43. As each door begins to close, facing each other from both the left and right sides in the door width direction W, the synthetic resin plate 72 slides and comes into close contact with the surface of the airtight rail 74 facing the door depth direction D. When each door is closed, the surfaces of the synthetic resin plates 72 provided on each door and the airtight rails 74 provided corresponding to each door come into close contact over the entire width direction W. As a result, the lower ends of the first door 40, second door 41, third door 42, and fourth door 43 are kept airtight.

[0065] [Function of the third airtight section] As shown in Figure 11, the third airtight section 8 consists of a silicone rubber packing 82 provided inside the gable end 45A on the door width direction W side of the first door 40, facing the opposite side of the door width direction W, and a bracket 83 fixed to the gable end 45A on the opposite side of the door width direction W of the second door 41, which has an airtight surface 84 that contacts the silicone rubber packing 82, and these two components are in close contact when the doors are closed. This state is symmetrical but the same structure is maintained in the relationship between the fourth door 43 and the third door 42. As each door begins to close so that they face each other from both the left and right sides in the door width direction W, the airtight surface 84 of the bracket 83 provided on the second door 41 approaches the silicone rubber packing 82 of the first door 40. When each door is closed, the silicone rubber packing 82 provided on the first door 40 and the airtight surface 84 provided on the second door 41 are in close contact. As a result, the end faces 45A of the first door 40 and the second door 41, and the fourth door 43 and the third door 42 are kept airtight.

[0066] [Function of the fourth airtight section] As shown in Figure 12, the fourth airtight section 9 is provided in two locations: between the first door 40 and the vertical frame 22 on the side of the first door 40 of the three-sided frame 2, and between the fourth door 43 and the vertical frame 22 on the side of the fourth door 43 of the three-sided frame 2.

[0067] As shown in Figure 12, between the first door 40 and the vertical frame 22 of the three-sided frame 2 on the side of the first door 40, the silicone rubber packing 92 fixed to the side of the bracket 91 fixed inside the vertical frame 22 facing the opposite side in the door width direction W, and the airtight surface 94 of the bracket 93 fixed to the end 45A on the opposite side in the door width direction W of the first door 40 are in airtight contact when the door is closed. As each door begins to close so that they face each other from both the left and right sides in the door width direction W, the airtight surface 94 of the bracket 93 provided on the first door 40 approaches the silicone rubber packing 92 provided on the vertical frame 22 on the side of the first door 40. When each door is closed, the silicone rubber packing 82 provided on the vertical frame 22 and the airtight surface 94 of the bracket 93 provided on the first door 40 are in airtight contact. As a result, the first door 40 and the vertical frame 22 on the side of the first door 40 are maintained in an airtight state. Similarly, the airtight seal is maintained between the fourth door 43 and the vertical frame 22 on the side of the fourth door 43.

[0068] [Function of the fifth airtight section] As shown in Figure 13, the fifth airtight section 10 is formed in a stepped shape in plan view along the respective surfaces 45 of the first door 40 and the second door 41. Opposing plates 101 are provided in a direction along the door depth direction D so as to connect the respective rising sections 211, and the airtight surface 103 of a silicone plate 102 fixed to the side of the opposing plate 101 facing the opposite side in the door width direction W is in airtight contact with the surface of the end side 45A of the first door 40 on the door width direction W side. As each door begins to close so that they face each other from both the left and right sides in the door width direction W, the surface of the end side 45A of the first door 40 approaches the airtight surface 103 of the silicone plate 102 on the first door 40 side. When each door is closed, the airtight surface 103 of the silicone plate 102 provided on the opposing plate 101 and the surface of the end side 45A of the first door 40 are in airtight contact. As a result, the first door 40 and the opposing plate 101 maintain an airtight seal. Similarly, on the end side 45A of the fourth door 43 opposite to the door width direction W, the airtight surface 103 of the silicone plate 102 provided on the opposing plate 101 and the surface of the end side 45A of the fourth door 43 are in airtight contact.

[0069] [Function of the sixth airtight section] As shown in Figure 19, in the sixth airtight section 11, the concave rubber 110 and the convex rubber 120 are in close contact with each other, with the first abutting surface 114 of the concave rubber 110 and the second abutting surface 124 of the convex rubber 120 being in pressure contact, and the convex portion 126 of the convex rubber 120 being in close contact with the concave portion 116 of the concave rubber 110, thus maintaining airtightness.

[0070] At the abutting portion of the concave rubber 110 and the convex rubber 120, as shown in Figure 20(a), the first abutting plane 114 of the concave rubber 110 and the second abutting plane 124 of the convex rubber are in close contact under pressure, and the convex portion 126 of the convex rubber 120 is in close contact with the recess 116 of the concave rubber 110 under pressure. As shown in Figure 20(b), the projection dimension of the convex portion 126 from the second abutting plane 124 is greater than the depth dimension of the recess 116, and in the abutting state shown in Figure 20(a), the convex portion 126 is pressed against the recess 116 in a direction that crushes it. The pressed convex portion 126 acts to narrow the grooves 128 formed on both sides in the longitudinal direction of the convex portion 126, so that the recess 116 and the convex portion 126 are in close contact with sufficient pressure. This shape ensures that the recess 116 and the protrusion 126 remain in close contact even if the closed state of the second door 41 and the third door 42 is slightly misaligned in the door depth direction D.

[0071] As detailed above, the double-opening doors with a smoke-blocking structure according to this embodiment, through the structure and operation of the first to sixth airtight sections, create an airtight seal between the three-sided frame 2 and the door, between the sill 3 and the door, and between the doors themselves, thereby preventing smoke from leaking out of the entrance 1 due to fire. Furthermore, even in the event of a fire, the release of halon agents, nitrogen, or carbon dioxide is prevented from leaking out of the entrance 1.

[0072] As described above, the double-opening automatic door 12 having a smoke-blocking structure according to this embodiment is a double-opening door having a smoke-blocking structure on at least two doors 4 that can be opened and closed in both horizontal directions relative to the three-sided frame 2 and the sill 3, and comprises a first airtight part 6 that seals the gap between the upper part of the door 4 and the upper frame of the three-sided frame 2, a second airtight part 7 that seals the gap between the lower part of the door 4 and the sill 3, a third airtight part 8 that seals the gap between the end ends of the door 4, a fourth airtight part 9 that seals the gap between the end end of the door and the vertical frame 22 of the three-sided frame 2, a fifth airtight part 10 that seals the gap between the end of the door 45A and the upper frame 21 of the three-sided frame 2, and a sixth airtight part 11 that seals the gap between the end ends 45A of the door 4 at the abutting portions. The sixth airtight section 11 is provided on the end faces 45A where the two doors 4 meet, facing each other, and includes a first abutting plane 114 on one end face 45A, a concave resin member 110 with a recess 116 formed in the longitudinal direction which is more concave than the first abutting plane 114, a second abutting plane 124 provided on the other end face 45A which contacts the first abutting plane 114, and a protrusion facing the recess 116 which is more convex than the second abutting plane 124. The door 4 comprises a convex resin member 120 formed by a protrusion 126 that extends larger than the depth dimension of the recess 116, and grooves 128 formed at the base portions on both sides along the longitudinal direction of the protrusion 126. When the door 4 is closed, the first abutting plane 114 and the second abutting plane 124 come into contact, and the protrusion 126 acts to narrow the grooves 128, causing the tip of the protrusion 126 to be crushed and tightly fitted into the recess 116.

[0073] As a result, compared to a system that moves the door and presses it against the three-sided frame, the airtightness of the double-opening automatic door 12 is ensured and a smoke-blocking effect is achieved by simply closing the first door 40 to the fourth door 43.

[0074] Furthermore, the first airtight section 6 is composed of a leaf spring 62 fixed to the upper frame 21 facing the surface 45 of the door 4 and biasing toward the door 4, and a synthetic resin plate 63 fixed to the free end of the leaf spring 62 and in contact with the surface 45 of the door 4.

[0075] As a result, compared to a system that moves the door and presses it against the three-sided frame, the airtight seal at the top of the double-opening automatic door 12 is ensured by the closing action of door 4 alone, thereby providing a smoke-blocking effect.

[0076] Furthermore, the second airtight section 7 includes an airtight rail 74 fixed along the opening and closing direction of the door 4 of the sill 3, a leaf spring 71 fixed to the lower part of the door 4 and biasing toward the airtight rail 74, and a synthetic resin plate 72 fixed to the free end of the leaf spring 71 and in contact with the airtight rail 74.

[0077] As a result, compared to a system that moves the door and presses it against the three-sided frame, the airtight seal at the bottom of the double-opening automatic door 12 is ensured by the closing action of door 4 alone, thereby providing a smoke-blocking effect.

[0078] Furthermore, the third airtight section 8 is located inside one door 4 and includes a silicone rubber packing 82 facing the opening direction of the other door 4, and an airtight plate 83B fixed to the end of the gable side 45A of the other door 4 and in contact with the silicone rubber packing 82. When the door 4 is closed, the silicone rubber packing 82 and the airtight plate 83B come into contact.

[0079] As a result, compared to a system where the door is moved and pressed against the three-sided frame, the airtight seal between each door of the double-opening automatic door 12 is ensured by the closing operation of door 4 alone, thereby providing a smoke-blocking effect.

[0080] Furthermore, the fourth airtight section 9 is composed of a silicone rubber packing 92 fixed to one of the vertical frames 22 facing the closing direction of the door 4, and an airtight material 93B fixed to the end 45A facing the opening direction of the door 4 and facing the closing direction of the door 4, so that when the door 4 is closed, the silicone rubber packing 92 and the airtight material 93B come into contact.

[0081] As a result, compared to a system where the door is moved and pressed against the three-sided frame, the airtight seal between the doors 4 at both ends of the double-opening automatic door 12 and the vertical frames 22 of the three-sided frame 2 is ensured by the closing action of the door 4 alone, thereby providing a smoke-blocking effect.

[0082] Furthermore, the door 43 is constructed to include a silicone rubber packing 92 fixed to one vertical frame 22 and the other vertical frame 22 on the opposite side, facing the opening direction of the door 43, and a surface 93 at the end of the end side 45A facing the closing direction of the door 43. When the door 43 is closed, the silicone rubber packing 92 and the surface 93 at the end of the end side 45A come into contact.

[0083] As a result, compared to a system where the door is moved and pressed against the three-sided frame, the airtight seal between the doors 4 at both ends of the double-opening automatic door 12 and the vertical frames 22 of the three-sided frame 2 is ensured by the closing action of the door 4 alone, thereby providing a smoke-blocking effect.

[0084] Furthermore, the fifth airtight section 10 includes an opposing plate 101 fixed to the upper frame 21 of the three-sided frame 2 in a position facing the end of one gable side 45A of the door 4, and a silicone plate 102 fixed to the opposing plate 101 facing the surface of the end of the gable side 45A of the door 4. When the door 4 is closed, the silicone plate 102 and the surface of the end of one gable side 45A of the door 4 come into contact.

[0085] As a result, compared to a system that moves the door and presses it against the three-sided frame, the closing action of door 4 alone ensures airtightness at the closing end of door 4 in the double-opening automatic door 12, thereby providing a smoke-blocking effect.

[0088] The mechanical parking system also includes a passenger compartment through which vehicles move in and out, a storage compartment through which vehicles move between the passenger compartment and the storage compartment, and a double-opening automatic door 12 having a smoke-blocking structure as described in any one of the first to eighth embodiments, which is installed at the entrance to the passenger compartment.

[0089] This ensures airtightness at the entrance doors of the passenger compartment where vehicles move in and out, thus providing a smoke-blocking effect. Furthermore, even if the fire extinguishing system is activated and halon agents, nitrogen, or carbon dioxide are released inside the garage where the mechanical parking system is installed, leakage of halon agents, nitrogen, or carbon dioxide from the entrance doors is suppressed.

[0090] Although an embodiment of the present invention has been described above with reference to one embodiment, this embodiment is merely an example, and various modifications can be made without departing from the spirit of the present invention. It goes without saying that the scope of the rights of the present invention is not limited to these embodiments.

[0091] For example, although the automatic door 12 of the double-opening type was described as having a drive unit 50, the double-opening door is not limited to this, and may be of a type that is opened and closed manually without a drive unit 50.

[0092] Furthermore, although the explanation described the doors as having four panels, they are not limited to this; they may also be double-opening doors with two, four or more panels, or an irregular number of panels on the left and right sides.

[0093] Furthermore, although it was explained that synthetic resin plates are used as the first and second airtight members, and that the material is Teflon (registered trademark), the invention is not limited to this, and silicone or other synthetic resin materials may be used, and the material does not have to be in the form of a plate, but may be a material that has heat resistance, abrasion resistance, etc., and is also flexible.

[0094] Furthermore, although it was explained that silicone rubber gaskets are used as the third and fourth airtight members, the material is not limited to this; any resin material that has heat resistance, abrasion resistance, etc., and is flexible may be used.

[0095] Furthermore, although it was explained that a silicone plate is used as the fifth airtight component, it is not limited to this, and Teflon® or other synthetic resin materials may be used, and it does not have to be in the form of a plate, but may be made of a material that has heat resistance, abrasion resistance, etc., and is also flexible.

[0096] Needless to say, the structure of each part, the materials used, etc., may be modified, improved, or altered in various ways within the scope of the technical concept of the present invention. [Explanation of Symbols]

[0097] 1 Entrance / exit 1A frame 12. Automatic door (an example of a double-opening door) 2 Three-sided frame 21 Upper frame 211 Startup Department 22 Vertical frame 23 Mounting components 25 Finishing materials 3 Threshold 31 rails 4 doors 40 Door 1 41 Door 2 42 Third Door 43 Door 4 44 Structural members 45 Surface 45A Wife's side 45B Inner surface 45C Reinforcement Material 46 Guide shoe 47. Suspension member 48 Laura 49 Safety Edge 50 Drive unit 52 Structure 54 rails 56 Drive mechanism 6. First airtight section 61 Airtight board 62. Leaf spring (an example of a biasing means) 63. Synthetic resin board (an example of a first airtight member) 64 Spacers 7. Second airtight section 71. Leaf spring (an example of a biasing means) 72. Synthetic resin sheet (an example of a second airtight component) 73 Spacers 74 Airtight rail 8. Third airtight section 81 Bracket 82. Silicone rubber gasket (an example of a third airtight component) 82A base 82B Straight section 82C Contact part 83 Bracket 83A Base material 83B Airtight material 84 Airtight surface 9. Fourth airtight section 91 Bracket 92. Silicone rubber gasket (an example of a fourth airtight component) 92A base 92B Straight section 92C Contact part 93 Bracket 93A Base material 93B Airtight material 94 Airtight surface 10. Fifth airtight section 101 Opposing plate (an example of an opposing part) 102 Silicone sheet (an example of the fifth airtight component) 103 Airtight surface 11. Sixth airtight section 110 Concave rubber (an example of a concave resin member) 112 Base 114 First butt plane 116 recess 120 Convex rubber (an example of a convex resin member) 122 Base 124 Second butt plane 126 Convex part 128 Groove L1 Floor level (entry level)

Claims

1. A double-opening door having a smoke-blocking structure on at least two doors that can be opened and closed in both lateral directions relative to a three-sided frame and threshold, A first airtight seal that closes the gap between the top of the door and the top frame of the three-sided frame, A second airtight seal that closes the gap between the lower part of the door and the threshold, A third airtight seal that closes the gap between the end faces of the aforementioned door, A fourth airtight section that seals the gap between the end of the door on the gable side and the vertical frame of the three-sided frame, A fifth airtight section that seals the gap between the end of the door on the gable side and the upper frame of the three-sided frame, It has a sixth airtight part that seals the gap between the end faces of the abutting portions of the aforementioned doors, The sixth airtight section is located on the gable end where the two doors meet, facing both gable ends. A first butt plane provided on one end, and a concave resin member having a recess formed in the longitudinal direction that is more concave than the first butt plane, A convex resin member is provided on the other end and comprises a second abutment plane that contacts the first abutment plane, a convex portion that protrudes greater than the depth dimension of the recess and is convex opposite the recess, and grooves formed on both sides of the base portion along the longitudinal direction of the convex portion. A double-opening door having a smoke-blocking structure, wherein when the door is closed, the first abutting plane and the second abutting plane are in contact, and the protrusion acts in such a way as to narrow the groove in the recess, causing the tip of the protrusion to be crushed and to make a tight fit.

2. The double-opening door having a smoke-blocking structure according to claim 1, wherein the first airtight section comprises a biasing member fixed to the upper frame facing the surface of the door and biasing toward the door, and a first airtight section fixed to the free end of the biasing member and in contact with the surface of the door.

3. The double-opening door having a smoke-blocking structure according to claim 1, wherein the second airtight section comprises an airtight rail fixed to the threshold along the opening and closing direction of the door, a biasing member fixed to the lower part of the door and biasing toward the airtight rail, and a second airtight member fixed to the free end of the biasing member and in contact with the airtight rail.

4. The third airtight section comprises a third airtight member located inside one of the doors and facing the opening direction of the other door, and an airtight plate fixed to the gable end of the other door and in contact with the third airtight member, wherein when the door is closed, the third airtight member and the airtight plate come into contact, the double-opening door having a smoke-blocking structure according to claim 1.

5. The fourth airtight section comprises a fourth airtight member fixed to one of the vertical frames facing the closing direction of the door, and an airtight material fixed to the end of the door facing the opening direction and facing the closing direction of the door, wherein when the door is closed, the fourth airtight member and the airtight material come into contact, the double-opening door having a smoke-blocking structure according to claim 1.

6. The fourth airtight section comprises a fourth airtight member fixed to one of the vertical frames and the other vertical frame opposite to it, facing the opening direction of the door, and a gable end surface facing the closing direction of the door, wherein when the door is closed, the fourth airtight member and the gable end surface come into contact, the double-opening door having a smoke-blocking structure according to claim 1.

7. The fifth airtight section comprises an opposing plate fixed to the upper frame of the three-sided frame at a position facing the end surface of one end of the door, and a fifth airtight member fixed to the opposing plate facing the end surface of the door, wherein when the door is closed, the fifth airtight member and the end surface of one end come into contact, the double-opening door having a smoke-blocking structure according to claim 1.

8. A mechanical parking system comprising: a passenger compartment through which a vehicle moves in and out; a storage compartment through which the vehicle moves between the passenger compartment and the storage compartment; and a double-opening door having a smoke-blocking structure according to any one of claims 1 to 7, installed at the entrance to the passenger compartment.

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