Water-proof door set

Abstract

To provide a water-proof door set having two swing doors and capable of improving the waterproof performance at a joint between the swing doors.SOLUTION: A water-proof door set 10 comprises an annular frame 11, a first swing door 12, a second swing door 13, a door-frame seal member 18, and a first joint seal member 20 that is located at a joint between the two swing doors and is pressed by the movement of the first swing door 12, etc., toward a door end to enhance waterproof performance. In the case of this configuration, there are few restrictions on a configuration in the door width direction, and a configuration that increases rigidity of a member that presses the first joint seal member 20 can be adopted, and pressing force can be made stronger, thereby enhancing waterproof performance at the joint.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a waterproof door set, more particularly to a waterproof door set having an annular frame and two swing doors. [Background technology]

[0002] JIS A4716 (2019) lists shutter and door types as water ingress prevention equipment fittings, and states that door types include those with swing or sliding doors. This swing door type component is disclosed in Patent Document 1 as a watertight door.

[0003] The waterproof door of Patent Document 1 has a first door body and a second door body, a first door pressing device that moves the first door body in a closed state to a waterproof position, and a second door pressing device that moves the second door body in a closed state to a waterproof position. This second door pressing device has a second door end side engaging and disengaging mechanism that engages with an engaged part provided on the first door body, and the engaged part and the second door end side engaging and disengaging mechanism press the seal member of the mating part to ensure waterproof performance.

[0004] Patent Document 2 discloses a biaxial hinge used in this swing-type water-resistant door. In this biaxial hinge, the rotation shaft on the frame side is mainly used to guide the swing action, and the rotation shaft on the frame side and the rotation shaft on the door side are used to guide the action of pressing the swing door against the seal member provided on the frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-59368 A [Patent Document 2] Japanese Utility Model Application Publication No. 58-11066 Summary of the Invention [Problem to be solved by the invention]

[0006] Fig. 10 of Patent Document 1 shows a cross-sectional view of the main part of the watertight door seen from the planar direction. This main part is the mating part of the first door body and the second door body, and the engaging member of the second door end side engaging mechanism provided on the second door body engages with the engaged part provided on the first door body, so that the seal member provided on the second door body is pressed in the vertical direction in Fig. 10, ensuring waterproof performance. The vertical direction in Fig. 10 is the direction perpendicular to the annular frame plane formed by the frame body that constitutes the watertight door.

[0007] In order to improve the waterproof performance, it is necessary to press the seal member in a direction perpendicular to the plane of the annular frame. However, at the joint between the door bodies, it is necessary to avoid increasing the thickness of the member in the direction perpendicular to the plane of the annular frame, and there is a restriction on the size of the door component that receives the pressed seal member. In order to suppress deformation of the component, it is necessary to suppress the pressing force, which makes it difficult to improve the waterproof performance of the seal member.

[0008] In addition, the water-resistant door set can also be used as a normal door when there is no need to block water. In that case, the seal member used at the joint between the swing doors must have a relatively small bulk modulus, and a relatively large displacement against a compressive force. However, when a member with a relatively small bulk modulus, that is, a member that can obtain a relatively large displacement against a compressive force, is used in the configuration described in Patent Document 1, if the pressing force is increased to improve the waterproof performance so as to block water, the two swing doors that make up the joint are likely to have a step in the vertical direction of the annular frame plane formed by the annular frame, and a gap is generated in relation to the seal member between the frame doors, and water leaks out from this gap.

[0009] In view of the above circumstances, the present invention has an object to provide a water-resistant door set which has two swing doors and can improve the waterproof performance at the joint between these swing doors. [Means for solving the problem]

[0010] The water-proof door set of the first invention is characterized by comprising an annular frame, a first swing door that fits into the annular frame, a second swing door that fits into the annular frame and pairs with the first swing door, a frame-door inter-sealing member that is attached to the annular frame and enhances waterproof performance when pressed by the movement of the first swing door and the second swing door in a direction perpendicular to the annular frame plane formed by the annular frame, and a first joining portion sealing member that is attached to at least one of the first swing door or the second swing door, located at the joining portion of the first swing door and the second swing door, and that enhances waterproof performance when pressed by the movement of the first swing door or the second swing door toward the door edge when the first swing door fits into the annular frame. The water-proof door set of the second invention is characterized in that, in the first invention, a second joint sealing member is provided on at least one of the first swing door or the second swing door so as to be sandwiched between the first swing door and the second swing door, and which enhances waterproof performance by being pressed by movement of the first swing door or the second swing door in a direction perpendicular to the annular frame plane. The water-proof door set of the third invention is characterized in that, in the first invention, a biaxial hinge is provided on the hanging side of at least one of the first swing door and the second swing door, the biaxial hinge having a function of guiding the swing motion of the first swing door or the second swing door and a function of guiding the pressing motion of the frame-door seal member in a direction perpendicular to the annular frame plane, and in the positional relationship in the horizontal plane of the door side axis of the biaxial hinge relative to the annular frame side axis of the biaxial hinge, the door side axis is positioned closer to the door end after the pressing motion than before the pressing motion. The water-proof door set of the fourth invention is characterized in that, in the third invention, the biaxial hinge is provided at one point on the hanging side of at least one of the first swing door and the second swing door, and the upper and lower ends of the biaxial hinge in the vertical direction are provided on either side of the center of gravity of the first swing door or the second swing door to which the biaxial hinge is provided. Effect of the Invention

[0011] According to the first invention, the first meeting part seal member, which is pressed by the movement of the first swing door or the second swing door toward the door end to improve the waterproof performance, is provided at the meeting part, so that the width direction of the swing door has relatively few restrictions on the configuration, and a configuration that increases the rigidity of the member that holds or presses the first meeting part seal member can be adopted. Therefore, the force pressing against the first meeting part seal member can be strengthened, and the waterproof performance at the meeting part between these swing doors can be improved. In addition, since the sealing member is pressed by the movement of the swing door toward the door end, the main direction in which it is pressed is different from conventional methods, and the gap between swing doors is reduced, which also improves waterproof performance. According to the second invention, the second joining part seal member is provided at the joining part, which improves the waterproof performance by being pressed in the direction perpendicular to the annular frame plane, thereby further improving the waterproof performance at the joining part. In addition, since the seal member is doubled, it is not necessary to press the second joining part seal member more than necessary, and the step in the direction perpendicular to the annular frame plane of the first swing door and the second swing door is reduced, which also improves the waterproof performance. According to the third invention, in the biaxial hinge provided on the hanging side of the door, the door side axis is positioned closer to the door end after the pressing action than before, so that the first seal member of the joint can be pressed appropriately with a simple configuration. According to the fourth invention, in a single biaxial hinge provided at one point on the hanging side, the upper and lower ends in the vertical direction are provided on either side of the door's center of gravity, so that the force acting above the door's center of gravity, attempting to open the door, is offset by the force acting below the door's center of gravity, attempting to close the door. This eliminates the need to make the spring constant of the position-maintaining spring used in the biaxial hinge extremely strong, and the structure of the biaxial hinge can be simplified. [Brief description of the drawings]

[0012] [Figure 1] 1A is an enlarged plan view of the first joint of the water-resistant door set according to the first embodiment of the present invention, and FIG 1B is an enlarged view of the first joint when the seal member is not pressed. [Diagram 2] FIG. 1 is a front view of a water-resistant door set according to a first embodiment of the present invention. [Diagram 3] FIG. 3 is an explanatory diagram from a perspective direction of the biaxial hinge used in the floodproof door set of FIG. 2. [Figure 4] FIG. 4 is an enlarged plan view of the biaxial hinge of FIG. 3. [Diagram 5] 5A is an enlarged plan view of the first joint of the water-resistant door set according to the second embodiment of the present invention, and FIG. 5B is an enlarged view of the first joint when the seal member is not pressed. [Figure 6] FIG. 11 is a front view of a water-resistant door set according to a third embodiment of the present invention. [Figure 7] FIG. 7 is an explanatory perspective view of the biaxial hinge used in the watertight door set of FIG. 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Next, an embodiment of the present invention will be described with reference to the drawings. However, the embodiment shown below is an example of a water-proof door set for embodying the technical concept of the present invention, and the present invention does not limit the water-proof door set to the following. Note that the size or positional relationship of the components shown in each drawing may be exaggerated for clarity of explanation. In addition, "vertical" and "parallel" in this specification do not necessarily mean "vertical" and "parallel" in the strict sense, but mean "substantially vertical" and "substantially parallel" that have that configuration and thus achieve that effect.

[0014] (First embodiment) <Overall composition> Fig. 2 shows a front view of the water-proof door set 10 according to the first embodiment of the present invention. Fig. 2 shows the water-proof door set 10 as seen from the outside of the room where water is expected to be present. The water-proof door set 10 is installed in an opening of a building, house, warehouse or other structure, or a tunnel, etc., and is a door set for preventing water present outside from entering the room, with the back side of Fig. 2 being the inside side and the front side being the outside side.

[0015] The water-proof door set 10 according to this embodiment is configured to include an annular frame 11, and a first swing door 12 and a second swing door 13 that fit into this annular frame 11. The annular frame 11 is configured to include two horizontal frames and two vertical frames, and it is preferable that these frames are joined together to form a rectangular ring shape.

[0016] The first swing door 12 is configured to fit into the annular frame 11, and is fixed to the right side of the annular frame 11 in the plane of the paper in Fig. 1 so as to be able to open and close freely by two biaxial hinges 30. The opening and closing direction is toward the front in Fig. 2, centering on the biaxial hinges 30.

[0017] The second swing door 13 is configured to fit into the annular frame 11, similar to the first swing door 12. The second swing door 13 is configured to be paired with the first swing door 12. This "paired configuration" means that "the combination of the two doors can prevent water from entering."

[0018] <Sealing material between door and frame 18> The annular frame 11 of the water-proof door set 10 according to this embodiment is provided with a frame-door seal member 18 for waterproofing. This frame-door seal member 18 is a known structure that can improve waterproofing performance by being pressed by the movement of the first swing door 12 and the second swing door 13 in a direction perpendicular to the annular frame plane formed by the annular frame 11. Here, the annular frame plane means a plane including the vertical and horizontal frames that constitute the annular frame 11, and the direction perpendicular to this annular frame plane means the depth direction in the paper plane of FIG. 2. In addition, the first swing door 12 and the second swing door 13 may operate at a predetermined angle with respect to the annular frame plane in order to improve waterproofing performance, but even in this case, the first swing door 12, etc. include a movement in a direction perpendicular to the annular frame plane, and the waterproofing performance of the frame-door seal member 18 can be improved by this movement in the perpendicular direction.

[0019] There are no particular limitations on the shape and material of the door-frame seal member 18. However, it is necessary that the seal member be capable of fully exhibiting waterproofing function when pressed by the pressing member 14 described below or by water pressure in a direction perpendicular to the plane of the annular frame.

[0020] <First joint portion seal member 20> The water-proof door set 10 according to this embodiment is equipped with a first joint seal member 20 for improving the waterproof performance of the joint between the first swing door 12 and the second swing door 13. The first joint seal member 20 will be described with reference to Figs. 1 and 2. Fig. 1 is an enlarged cross-sectional view of the planar direction of the joint of the water-proof door set 10 according to this embodiment, specifically, the II cross section of Fig. 2. Fig. 1(A) is an enlarged cross-sectional view of the first joint seal member 20 when it is not pressed, and Fig. 1(B) is an enlarged cross-sectional view of the first joint seal member 20 when it is pressed against each other. In Fig. 1, the upper side is the indoor side, and the lower side is the outdoor side.

[0021] The first meeting portion seal member 20 is located at the meeting portion between the first swing door 12 and the second swing door 13. The first meeting portion seal member 20 of this embodiment is configured to include a first swing door side member 20a provided on the first swing door 12 side and a second swing door side member 20b provided on the second swing door 13 side. A protrusion is provided on the indoor side of the first swing door 12, and the first swing door side member 20a is provided on its tip surface. A cutout portion is provided on the indoor side of the second swing door 13 so that the protrusion provided on the first swing door 12 can enter, and the second swing door side member 20b is provided on the bottom surface of this cutout portion.

[0022] In this embodiment, the first swing door 12 and the second swing door 13 move in the directions indicated by the arrows in Fig. 1(B), that is, in the directions in which the respective swing doors approach and in the direction from the outside to the inside of the room, and press the first meeting part seal member 20. The directions in which the swing doors approach are the same as the door width direction when the first swing door 12 fits into the annular frame 11 and the door tip direction of the swing doors.

[0023] In addition, it is preferable that the mating surfaces of the first swing door side member 20a and the second swing door side member 20b constituting the first joint portion seal member 20 have a predetermined angle with respect to the annular frame plane in consideration of the movements of the first swing door 12 and the second swing door 13. This is to prevent interference between them when the second swing door 13 is closed while the first swing door 12 is fitted into the annular frame 11. In this embodiment, the angle between the mating surfaces and the annular frame plane is greater than 45 degrees and less than 90 degrees.

[0024] <Pressing member 14> The water-proof door set 10 according to the present embodiment preferably includes a pressing member 14 for activating the waterproof function of the inter-frame door seal member 18. The pressing member 14 has a known configuration, and can operate the first swing door 12 and the second swing door in a predetermined direction to press at least either the inter-frame door seal member 18 or the first joining portion seal member 20. For example, the pressing member 14 corresponds to a member having a cremone handle. As shown in FIG. 2, in this embodiment, a total of three pressing members 14 are provided on the hanging side of the first swing door 12 and on the hanging side and lower part of the second swing door 13, but this configuration is not limited to this. It may be provided on either the first swing door 12 or the second swing door 13. When provided on either one of them, in this embodiment, the first swing door 12 closes first, and the second swing door 13 closes later, so that the pressing member 14 is preferably provided on the second swing door 13. In addition, the expressions "door end side" and "hanging side" are used to describe the installation location of the pressing member 14, but "hanging side" means the side closer to the center of the swing action of the swing door structure, and "door end side" means the side opposite to the "hanging side." In some cases, the pressing member 14 is not provided. In this case, as the water level outside rises, the swing door of the waterproof door set 10 presses each seal member due to water pressure while being guided by the biaxial hinge 30 described below.

[0025] <Biaxial hinge 30 in the first embodiment> In the water-proof door set 10 according to this embodiment, it is preferable that a biaxial hinge 30 is provided on the hanging side of each of the first swing door 12 and the second swing door 13 so that the pressing member 14 can be used to perform an operation to enhance waterproof performance. Fig. 3 shows an explanatory view from a perspective direction of the biaxial hinge 30 used in this embodiment, and Fig. 4 shows an enlarged view in a plan direction thereof. The biaxial hinge 30 in Figs. 3 and 4 is a view of the biaxial hinge 30 located at the upper left of the paper in Fig. 2. These figures show the state before the operation to enhance waterproof performance by the pressing member 14 or the like is performed.

[0026] The biaxial hinge 30 used in the water-proof door set 10 according to this embodiment includes a frame-side base 31 attached to the annular frame 11, a door-side base 32 attached to the second swing door 13, and a connecting plate 33 provided between them. The frame-side base 31 and the connecting plate 33 are fixed to be rotatable about the annular frame-side axis by the frame-side axis 31a. The door-side base 32 and the connecting plate 33 are fixed to be rotatable about the door-side axis by the door-side axis 32a. In addition, before the operation of enhancing the waterproof performance by the pressing member 14 or the like, the door-side axis is located farther away from the annular frame plane than the annular frame-side axis. To achieve this position, the vertical length of the door-side base 32 (length perpendicular to the annular frame plane) is longer than the vertical length of the frame-side base 31 on the paper surface of FIG. 4.

[0027] When the biaxial hinge 30 is configured as described above, the center of the door-side shaft 32a is at the position C2 before the pushing action of the swing door to improve the waterproof performance, but after this pushing action, the center of the door-side shaft 32a moves to the position C3. Due to this movement, the second swing door 13 moves by a dimension a to the right side (toward the door end side when the first swing door 12 fits into the annular frame 11) on the paper surface of FIG. 4, and also moves by a predetermined dimension in the up-down direction (direction perpendicular to the plane of the annular frame). By moving by a in this left-right direction, the waterproof performance of the first joint seal member 20 can be improved.

[0028] In the biaxial hinge 30 provided on the hanging side of the door, the door side axis is positioned closer to the door tip after the pressing action than before, so that the first joining portion seal member 20 can be pressed appropriately with a simple configuration.

[0029] In addition, in the conventional hinge having two shafts, it was necessary to adopt a structure that the door side shaft 32a does not move to the right side in the paper plane of FIG. 4. The weight of a water-proof swing door is 60 kg or more. When this weight is supported by two hinges, a force acts in the direction that separates the two bases in the hinge located above the center of gravity of the swing door, and a force acts in the direction that brings the two bases closer together in the hinge located below the center of gravity of the swing door. In particular, in the upper hinge, when a force acts in the direction that separates the two bases, it is necessary to adopt a structure that actually prevents the two bases from separating as much as possible. Therefore, in the hinge in Patent Document 2, before pressing with a pressing member 14 such as a cremone, i.e., before the waterproof performance is improved, the door side shaft and the frame side shaft are arranged so as to be at the same distance from the annular frame plane, and after pressing with the pressing member 14, i.e., after the waterproof performance is improved, the door and the frame are configured to be close to each other. However, in this embodiment, a spring (not shown) having a spring constant equal to or greater than a predetermined value is used for maintaining the position of the biaxial hinge 30, and the distance caused by the weight of the swing door is kept as small as possible. When the swing door is operated by the pressing member 14, the second swing door 13 is operated by a distance a toward the door end in the page of Figure 4, thereby improving waterproof performance by the first joining portion sealing member.

[0030] <Other> In the present embodiment, the structure using the two-axis hinge 30 has been described, but the present invention is not limited to this. For example, a structure in which a mechanism for moving in the direction of the door ends of each door is added to a single-axis hinge may also be used.

[0031] In addition, the shape and material of the first joining part seal member 20 are not particularly limited to the shapes and the like described above. For example, in this embodiment, the first joining part seal member 20 is composed of two members, the first swing door side member 20a and the second swing door side member 20b, but it may be provided only on one swing door. However, it is necessary that the seal member be able to fully exert its waterproof function when pressed against the door end side by the pressing member 14.

[0032] <How to use> In normal times when flood prevention is not required, the user of the flood-proof door set 10 fits the first swing door 12 into the annular frame 11, swings the second swing door 13 using the door knob 17 provided on the second swing door 13, opens the second swing door, and passes through the flood-proof door set 10. When passing large luggage, the user swings not only the second swing door 13 but also the first swing door 12 to open both doors, allowing luggage that can pass through the inside of the annular frame 11 to pass through. The user also uses the key provided on the second swing door 13 to close the first swing door 12 and the second swing door 13, and then locks the flood-proof door set 10. In normal times, the pressing member 14 is not used.

[0033] In an emergency requiring water ingress prevention, the user of the water-proof door set 10 first closes the first swing door 12 and the second swing door 13. The user then uses the pressing member 14 to move the first swing door 12 or the second swing door 13 toward the door end to improve the waterproof performance of the first joining portion seal member 20, and moves the first swing door 12 and the second swing door 13 in a direction perpendicular to the annular frame plane to improve the waterproof performance of the frame-door seal member 18. By using the water-proof door set 10 in this way, water can be prevented from entering the room from the outside.

[0034] Since the first meeting portion seal member 20, which enhances waterproof performance by being pressed by the movement of the first swing door 12 or the second swing door 13 toward the door end, is provided at the meeting portion, there are relatively few restrictions on the configuration in the width direction of the swing door, so a configuration can be adopted that enhances the rigidity of the member that holds or presses the first meeting portion seal member 20. Therefore, the force pressing against the first meeting portion seal member 20 can be strengthened, and the waterproof performance at the meeting portion between these swing doors can be improved.

[0035] In addition, since the sealing member is pressed by the movement of the swing door toward the door end, the main direction in which it is pressed is different from conventional methods, and the gap between swing doors is reduced, which also improves waterproof performance.

[0036] Second embodiment FIG. 5 shows an enlarged plan view of the intersection of the water-resistant door set according to the second embodiment of the present invention. FIG. 5(A) is an enlarged view when the first intersection seal member 20 is not pressed, and FIG. 5(B) is an enlarged view when the first intersection seal member 20 is pressed. In FIG. 5, the upper side is the indoor side, and the lower side is the outdoor side. The difference between the water-resistant door set 10 according to the first embodiment and the water-resistant door set 10 according to the second embodiment is only the structure of the intersection between the first swing door 12 and the second swing door 13, so the following will explain the difference and omit the explanation of the same structure and usage method.

[0037] <Second joint seal material> The water-proof door set 10 according to this embodiment includes a first joint seal member 20 for improving the waterproof performance of the joint between the first swing door 12 and the second swing door 13, as well as a second joint seal member 21. The first joint seal member 20 is the same as that of the first embodiment.

[0038] As shown in Fig. 5, the second meeting portion seal member 21 is provided on the first swing door 12 in this embodiment. This second meeting portion seal member 21 is provided so as to be sandwiched between the first swing door 12 and the second swing door 13 when they are fitted in the annular frame 11. In this embodiment, the second swing door 13 moves upward in the plane of Fig. 5, that is, in a direction perpendicular to the plane of the annular frame, so that the second meeting portion seal member 21 is pressed, thereby improving the waterproof performance of the meeting portion.

[0039] In this embodiment, the second meeting portion seal member 21 is provided on the first swing door 12, but is not limited thereto. It is also possible to provide it on the second swing door 13. Also, in this embodiment, the second swing door 13 presses the second meeting portion seal member 21 by moving in a direction perpendicular to the annular frame plane, but is not limited thereto. It is also possible to press the second meeting portion seal member 21 by moving the first swing door 12 in a direction perpendicular to the annular frame plane.

[0040] In this embodiment, a protrusion is provided on the exterior side of the first swing door 12, and a second joining portion seal member 21 is disposed on the interior side of the protrusion.

[0041] The shape and material of the second joining portion seal member 21 are not particularly limited. In this embodiment, the second joining portion seal member 21 is provided only on the first swing door 12, but it may be provided on both the first swing door 12 and the second swing door 13. However, it is necessary that the seal member be capable of fully exerting a waterproof function when pressed in a predetermined direction by the pressing member 14.

[0042] The second joining part seal member 21, which is pressed in a direction perpendicular to the annular frame plane to improve waterproof performance, is provided at the joining part, thereby further improving waterproof performance at the joining part. In addition, since the seal member is doubled, it is not necessary to press the second joining part seal member 21 more than necessary, and the step in the direction perpendicular to the annular frame plane of the first swing door 12 and the second swing door 13 is reduced, which also improves waterproof performance.

[0043] Third embodiment <Biaxial hinge 30 in the third embodiment> Fig. 6 shows a front view of a water-resistant door set according to a third embodiment of the present invention, and Fig. 7 shows an explanatory view from a perspective direction of the biaxial hinge 30 used in this embodiment. The only difference between the water-resistant door set 10 according to the first embodiment and the water-resistant door set 10 according to the third embodiment is the structure of the biaxial hinge 30, so the following will explain the differences and omit the explanation of the same structure and method of use. The biaxial hinge 30 in Fig. 7 is a diagram of the biaxial hinge 30 located at the upper left on the paper surface of Fig. 6. This figure shows the state before the operation of increasing waterproof performance by the pressing member 14.

[0044] The biaxial hinge 30 used in the water-proof door set 10 according to this embodiment includes a frame-side base 31 attached to the annular frame 11, a door-side base 32 attached to the second swing door 13, and a connecting plate 33 provided between them. The frame-side base 31 and the connecting plate 33 are fixed to each other by a frame-side shaft 31a so as to be rotatable about the annular-frame-side axis. The door-side base 32 and the connecting plate 33 are fixed to each other by a door-side shaft 32a so as to be rotatable about the door-side axis.

[0045] The difference from the biaxial hinge 30 in the first embodiment is that, whereas in the first embodiment, two biaxial hinges 30 are provided above and below one location on the hanging side of each of the first swing door 12 and the second swing door 13, in this embodiment, one is provided for each hanging side. That is, in this embodiment, the connecting plate 33 is longer than that of the biaxial hinge 30 in the first embodiment. That is, in regard to the first swing door 12, the upper end U1 and the lower end D1 in the vertical direction of the biaxial hinge 30 are provided on either side of the center of gravity G1 of the first swing door 12 on which the biaxial hinge 30 is provided.

[0046] In one biaxial hinge 30 provided at one point on the hanging side, the upper end U1 and lower end D1 in the vertical direction are provided on either side of the door center of gravity G1. This means that the force acting above the door center of gravity G1, attempting to open the door, is offset by the force acting below the door center of gravity G1, attempting to close the door. This eliminates the need to make the spring constant of the position-maintaining spring used in biaxial hinge 30 extremely strong, allowing the configuration of biaxial hinge 30 to be simplified. [Explanation of symbols]

[0047] 10. Flood-proof door set 11 Ring frame 12 First Swing Door 13 Second Swing Door 14 Pressing member 18. Door frame seal material 20 First joint seal member 21 Second joint seal member 30 Double-axis hinge D1 bottom end G1 Center of gravity U1 upper end

Claims

1. An annular frame; a first swing door fitted into the annular frame; a second swing door that fits into the annular frame and pairs with the first swing door; a frame-door seal member that is provided on the annular frame and that enhances waterproof performance by being pressed by the movement of the first swing door and the second swing door in a direction perpendicular to the annular frame plane formed by the annular frame; A first joint seal member is provided on at least one of the first swing door or the second swing door, is located at the joint between the first swing door and the second swing door, and is pressed by the movement of the first swing door or the second swing door toward the door end when the first swing door is fitted into the annular frame, thereby enhancing waterproof performance. A water-resistant door set.

2. At least one of the first swing door and the second swing door, The door is provided so as to be sandwiched between the first swing door and the second swing door, A second joint seal member is provided to enhance waterproof performance by being pressed by the movement of the first swing door or the second swing door in a direction perpendicular to the annular frame plane.

2. The watertight door set according to claim 1.

3. At least one of the first swing door and the second swing door has a hinge side, A biaxial hinge is provided for the first swing door or the second swing door, the biaxial hinge having a function of guiding a swing motion and a function of guiding a pressing motion of the inter-frame door seal member in a direction perpendicular to the annular frame plane, In the positional relationship in a horizontal plane between the annular frame side axis of the biaxial hinge and the door side axis of the biaxial hinge, the door side axis is located closer to the door end after the pressing operation than before the pressing operation.

2. The watertight door set according to claim 1.

4. The biaxial hinge is provided at one position on the hinge side of at least one of the first swing door and the second swing door, The upper end and the lower end of the biaxial hinge in the vertical direction are provided across the center of gravity of the first swing door or the second swing door on which the biaxial hinge is provided.

4. A watertight door set according to claim 3.

Images