Waterproof door structure

Abstract

To achieve sufficient waterproof performance while having a simple and low-cost structure.SOLUTION: A packing 30 of a waterproof door structure is formed by stacking a first elastic member 32a having a rectangular cross section and fixed to the left side portion 12 of the door frame, and a second elastic member 32b having a rectangular cross section and in contact with a front face of a waterproof door body 20 in the closed state. The thickness of the first elastic member 32a is set to be larger than the thickness of the second elastic member 32b. The hardness of the second elastic member 32b is lower than the hardness of the first elastic member 32a. The second elastic member 32b is disposed so as to be accommodated inside the end portion 20a of the waterproof door main body 20.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a waterproof door structure that prevents water from entering. [Background technology]

[0002] For example, Patent Document 1 discloses a waterproof door for preventing water from entering a facility in the event of flood damage such as heavy rain or a tsunami. The waterproof door of Patent Document 1 includes a door frame provided at an entrance and a door body attached to the door frame so as to be freely opened and closed, and an outer peripheral elastic part is fixed to the peripheral edge of the door body. The outer peripheral elastic part is formed of a P-type packing. The P-type packing has a first elastic part and a second elastic part fixed to the first elastic part via a mounting plate. The first elastic part is formed in a P-shaped cross section having a hollow part, and has a laminated structure in which a surface part is laminated on the outer surface of the hollow part. The second elastic part has a laminated structure in which a thin flat-plate-shaped member and a thick flat-plate-shaped member are laminated.

[0003] Patent Document 2 discloses a door structure for a liquid storage chamber, and a P-type packing having a P-shaped cross section is fixed to the door of this structure as well, as shown in Figure 4 of Patent Document 2. A watertight seal soft packing is laminated on the outer surface of the hollow part of this P-type packing, and two packing backing plates are provided on the flat part of the P-type packing.

[0004] FIG. 6 of Patent Document 2 shows a waterproof structure in which a watertight seal hard packing and a watertight seal soft packing are laminated on a packing backing plate. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5977320 [Patent Document 2] Japanese Patent Application Publication No. 11-173024 Summary of the Invention [Problem to be solved by the invention]

[0006] However, since the water pressure acting on a waterproof door from the outside during heavy rain, for example, can be quite large, a waterproof structure is desired that will prevent water from entering the facility even when such a large water pressure acts on it. On the other hand, there is a demand for the waterproof structure to be as simple as possible, taking into consideration the manufacturing cost, maintainability, etc.

[0007] In this regard, the P-type packing of Patent Document 1 has a laminated structure in the hollow part of the first elastic part and a laminated structure in the flat part of the second elastic part, and the first elastic part and the second elastic part are integrated via a mounting plate, so the number of parts and the number of assembly steps increase, and not only does the manufacturing cost increase, but the maintainability is also not good. In addition, the packing has a complex shape with a hollow part, which also leads to an increase in the manufacturing cost.

[0008] The form shown in FIG. 4 of Patent Document 2 is also a P-type packing with a complex shape having a hollow portion, and the outer surface of the hollow portion has a laminated structure, and the flat portion also has a laminated structure with a packing backing plate, so like the one in Patent Document 1, the manufacturing cost increases and there is room for improvement in maintainability.

[0009] In addition, in the embodiment shown in Fig. 6 of Patent Document 2, the absence of a hollow portion simplifies the shape, which is thought to reduce manufacturing costs. However, when water pressure is applied (Fig. 8 of Patent Document 2), the hard watertight seal packing and the soft watertight seal packing separate, and the two do not work together to improve waterproof performance, which may allow water to enter.

[0010] There are concerns about water infiltration under high water pressure even with the P-type packing of Patent Document 1. That is, in the case of the P-type packing, the part that comes into contact with the door stop is curved, so the contact area with the door stop is small, and water leaks are likely to occur under high water pressure. Furthermore, the hollow part of the P-type packing is easily deformed, so it may deform under high water pressure, resulting in water leaks.

[0011] The P-type packing in Patent Document 2 has a shape that allows for surface contact, but like the packing in Patent Document 1, the hollow portion of the P-type packing is prone to deformation, and similar problems can occur.

[0012] The present disclosure has been made in consideration of these points, and an object of the present disclosure is to provide a structure that is simple and allows for low cost while still providing sufficient waterproof performance. [Means for solving the problem]

[0013] In order to achieve the above object, one aspect of the present disclosure can be based on a waterproof door structure comprising a door frame fixed to a structure, a waterproof door body rotatably supported on the door frame via a hinge, and a gasket interposed between the door frame and one side of the waterproof door body and continuous in the circumferential direction of the waterproof door body, preventing water from entering from the side where the other side of the waterproof door body is located.

[0014] The packing is formed by laminating a first elastic member having a rectangular cross section fixed to a portion of the door frame facing one side of the waterproof door main body, and a second elastic member having a rectangular cross section fixed to a surface of the first elastic member opposite the door frame and in contact with one side of the waterproof door main body in a closed state. The thickness of the first elastic member is set to be thicker than that of the second elastic member. The hardness of the second elastic member is set to be softer than that of the first elastic member. The second elastic member is arranged so as to be located inside one side of the waterproof door main body relative to the end of the one side.

[0015] According to this configuration, the first elastic member and the second elastic member that constitute the packing are both rectangular in cross section and have a simple shape, so the packing is less expensive than the conventional P-type packing. Also, since the first elastic member and the second elastic member are simply laminated, the packing is less expensive than the conventional packing in which multiple locations are laminated.

[0016] When the waterproof door body is in the closed state, the second elastic member of the packing comes into contact with one side of the waterproof door body. When water pressure acts on the other side of the waterproof door body in the closed state, outside water enters between the door frame and the waterproof door body from the end of the waterproof door body. At this time, since the second elastic member is softer than the first elastic member, the second elastic member easily elastically deforms and adheres to the one side of the waterproof door body, and there is no gap, i.e. no water gap, between the second elastic member and the one side of the waterproof door body. At low water pressure, sufficient waterproof performance can be obtained by the elastic deformation of the second elastic member alone.

[0017] When the water pressure is high, the waterproof door body is displaced by the water pressure, and one side of the waterproof door body strongly presses the packing. In other words, when the packing is strongly pressed by the waterproof door body, both the first elastic member and the second elastic member are elastically deformed, and at this time, since the second elastic member is thin and soft, the second elastic member is crushed and embedded in the first elastic member.

[0018] This second elastic member is arranged so as to be located inside one surface of the waterproof door main body rather than the end of the one surface, so that water is less likely to get in between the second elastic member and one surface of the waterproof door main body. Also, the second elastic member buried in the first elastic member is not directly subjected to high water pressure, and it is the first elastic member, which is relatively hard and does not easily deform even under high water pressure, that directly receives high water pressure, so that a water conduit is less likely to be formed between the waterproof door main body and the second elastic member. Also, since the packing is made up of the first elastic member and the second elastic member, which are rectangular in cross section, the contact area is not narrow due to the curved surface as in the conventional P-type packing, but is in wide surface contact with one surface of the waterproof door main body, which also makes it less likely to form a water conduit between the waterproof door main body and the second elastic member.

[0019] A groove may be provided in a portion of the door frame facing one surface of the waterproof door main body, into which a portion of the first elastic member on the door frame side fits. In this case, the first elastic member can be formed so as to protrude from the groove in a non-compressed state. With this configuration, when attaching the packing to the door frame, the first elastic member is fitted into the groove, and the first elastic member is bonded to the inner surface of the groove as necessary, so that the installation work of the packing is simplified. In addition, when removing the packing for maintenance or the like, it is only necessary to pull it out of the groove, so that the removal work of the packing is also simplified.

[0020] The waterproof door structure may include a biasing force generating device that biases the waterproof door body in a closing direction. In this case, the hardness of the second elastic member can be set so that it is elastically deformed when pressed by one surface of the waterproof door body to which the biasing force of the biasing force generating device acts. With this configuration, the second elastic member can be kept in close contact with one surface of the waterproof door body by utilizing the biasing force of a biasing force generating device such as a door closer, an auto hinge (hinge closer), a cremone handle, or a latch.

[0021] The thickness of the second elastic member provided at the lower edge of the door frame may be set to be thicker than that of the second elastic member provided at the upper edge of the door frame. In other words, the lower edge of the door frame is a place where water can easily penetrate compared to the upper edge, and by making the second elastic member provided at the place where water can easily penetrate relatively thick, it becomes difficult for a water leak to form between the lower edge of the door frame and one side of the waterproof door body.

[0022] The second elastic member provided at the lower edge of the door frame may be continuous from one side edge to the other side edge of the door frame. That is, since the waterproof door body is structured to rotate by a hinge, when opening, the hinge side part of the waterproof door body moves so as to rub against the second elastic member with the opening operation. At this time, if the waterproof door body rubs against the edge of the second elastic member, the second elastic member may peel off from the edge, but in this configuration, since the second elastic member is continuous from one side edge to the other side edge of the door frame, the waterproof door body does not rub against the edge of the second elastic member, and peeling of the second elastic member from the edge can be suppressed and sufficient waterproof performance can be obtained. Effect of the Invention

[0023] As described above, the gasket is formed by stacking a first elastic member and a second elastic member, each of which has a rectangular cross section, making the first elastic member relatively thick and the second elastic member relatively soft, and is positioned so that the second elastic member is contained inside the edge of the waterproof door body. This makes it possible to obtain sufficient waterproof performance while maintaining a simple and low-cost structure. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view of a waterproof door structure according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a front view of a waterproof door structure according to a first embodiment of the present invention. [Diagram 3] 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 2. [Diagram 5] 3 is a cross-sectional view taken along line VV in FIG. 2. [Figure 6] 6 is a cross-sectional view taken along the line VI-VI in FIG. [Figure 7] FIG. 4 is a view equivalent to FIG. 3 when low water pressure is applied. [Figure 8] This is a view equivalent to FIG. 3 when high water pressure is applied. [Figure 9] FIG. 4 is an enlarged view of a lower portion of the packing. [Figure 10] 13 is a diagram illustrating the positional relationship between a second elastic member at the lower side of the packing and the waterproof door main body. FIG. [Figure 11] FIG. 11 is a perspective view of a waterproof door structure according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its applications, or its uses.

[0026] FIG. 1 is a perspective view of a waterproof door structure 1 according to a first embodiment of the present invention. The waterproof door structure 1 is provided in a structure 100 such as a house, an office, a factory, a warehouse, etc., and is intended to prevent water in a space outside the waterproof door structure 1 from infiltrating into a space inside the waterproof door structure 1. The structure 100 is not limited to the above-mentioned example, and may be, for example, a structure constituting an underground facility such as an underground mall or a subway, or may be a structure constituting a passage or stairs. The space outside and the space inside the waterproof door structure 1 may be passages or stairs, etc. The space outside the waterproof door structure 1 may be a space outside the structure 100, and in this case, the waterproof door structure 1 can be used to prevent water caused by flood damage such as heavy rain or tsunami from infiltrating into the space inside the structure 100. In other words, the waterproof door structure 1 can be provided to protect important equipment and areas from infiltration of water.

[0027] In the description of this embodiment, the side on which water pressure acts is referred to as the outside, and the side that prevents water from entering is referred to as the inside. In addition, the side that is the left side when the waterproof door structure 1 is viewed from the outside is simply referred to as the left side, and the side that is the right side when the waterproof door structure 1 is viewed from the outside is simply referred to as the right side. This definition of the directions is provided only for the convenience of description, and does not limit the directions when installed or used.

[0028] The waterproof door structure 1 includes a door frame 10 fixed to a structure 100, a waterproof door body 20, and a packing 30. The door frame 10 is rectangular in shape and is elongated in the vertical direction, and has an upper side portion 11, a left side portion 12, a lower side portion 13, and a right side portion 14. The upper side portion 11 and the lower side portion 13 extend in the left-right direction and are approximately parallel to each other. The left side portion 12 and the right side portion 14 extend in the vertical direction and are approximately parallel to each other. That is, the left side portion 12 extends downward from the left end of the upper side portion 11, and the left end of the lower side portion 13 is connected to the lower end of the left side portion 12. The right side portion 14 extends downward from the right end of the upper side portion 11, and the right end of the lower side portion 13 is connected to the lower end of the right side portion 14. The shape of the door frame 10 is not limited to the shape shown in the figure, and the ratio of the vertical dimension to the horizontal dimension of the door frame 10 (aspect ratio) can be set arbitrarily.

[0029] The waterproof door body 20 has an outer shape corresponding to the rectangular shape of the door frame 10, and is therefore a rectangle that is long in the vertical direction. When the waterproof door body 20 is in a closed state, the surface facing the inside is one surface, and the surface facing the outside is the other surface. One surface of the waterproof door body 20 is referred to as the front surface, and the other surface of the waterproof door body 20 is referred to as the back surface.

[0030] The right side of the waterproof door main body 20 is rotatably supported by the right side portion 14 of the door frame 10 via a hinge 21. A plurality of hinges 21 are provided at intervals in the vertical direction. The rotation axis of the hinge 21 extends in the vertical direction, and therefore the waterproof door main body 20 rotates about the axis extending in the vertical direction and is switched between an open state shown in Figs. 1 and 2 and a closed state (shown in Figs. 7 and 8). In the open state, the entire door frame 10 can be opened, and people can enter and exit through the inside of the door frame 10. On the other hand, in the closed state, the entire door frame 10 is completely blocked.

[0031] A door latch 21a and a door lever 22 for operating the door latch 21a are provided on the opposite side of the waterproof door body 20 to the hinge 21. When the waterproof door body 20 is in the closed state, the door latch 21a is inserted into and locked in a locking hole (not shown) formed in the left side portion 12 of the door frame 10, and the waterproof door body 20 does not rotate in the opening direction. When operating the waterproof door body 20 in the opening direction, the door lever 22 is operated to set the door latch 21a in the unlocked state. An electric lock or an electronic lock can be attached to the waterproof door body 20 as necessary.

[0032] The waterproof door structure 1 also includes a door closer (an example of a biasing force generating device) 40. The door closer 40 is a device that generates a biasing force that biases the waterproof door main body 20 in the closing direction, and a conventionally known door closer can be used. That is, the door closer 40 includes a main body part 41 that is fixed to the inner surface of the waterproof door main body 20, and an arm 42 that extends from the main body part 41 and is rotatably connected to the upper side part 11 of the door frame 10. A spring or the like built into the main body part 41 applies a rotational force to the arm 42 in the direction of closing the waterproof door main body 20. A general door closer 40 can be used instead of a product specifically for waterproof doors.

[0033] Although not shown, the waterproof door main body 20 may be supported on the left side portion 12 of the door frame 10, or on the upper side portion 11 or the lower side portion 13. In this case, the installation position of the door closer 40 is also changed. The door closer 40 may be fixed to the outer surface of the waterproof door main body 20, and instead of the door closer 40, a biasing force generating device such as an auto hinge (hinge closer), a cremone handle, or a bar may be used to generate a biasing force that biases the waterproof door main body 20 in the closing direction.

[0034] The packing 30 is interposed between the door frame 10 and the inner surface of the waterproof door main body 20, and is continuous in the circumferential direction of the waterproof door main body 20. This packing 30 is a member that seals the gap between the door frame 10 and the inner surface of the waterproof door main body 20 all around, and prevents water from entering from the side where the back surface of the waterproof door main body 20 is located (the outside).

[0035] The packing 30 is fixed to the door frame 10. That is, the packing 30 has an upper part 31 extending in the left-right direction along the upper edge part 11 of the door frame 10, a left part 32 extending in the up-down direction along the left edge part 12 of the door frame 10, a lower part 33 extending in the left-right direction along the lower edge part 13 of the door frame 10, and a right part 34 extending in the up-down direction along the right edge part 14 of the door frame 10. The upper part 31 and the lower part 33 are parallel to each other, and the left part 32 and the right part 34 are also parallel to each other. That is, the left part 32 extends downward from the left end part of the upper part 31, and the left end part of the lower part 33 is connected to the lower end part of the left part 32. The right part 34 extends downward from the right end part of the upper part 31, and the right end part of the lower part 33 is connected to the lower end part of the right part 34.

[0036] As shown in FIG. 3, the left side edge 12 of the door frame 10 has a base plate portion 12a extending in the left-right direction and a vertical plate portion 12b protruding outward from the left end of the base plate portion 12a. The base plate portion 12a is a portion of the door frame 10 that faces the surface of the waterproof door main body 20. The outer surface (outer surface) of the base plate portion 12a is provided with a holder 12c to which the left side portion 32 of the packing 30 is attached. The holder 12c has a fixed plate portion 12d fixed to the outer surface of the base plate portion 12a, a left side plate portion 12e protruding outward from the left end of the fixed plate portion 12d, and a right side plate portion 12f protruding outward from the right end of the fixed plate portion 12d. Inside the holder 12c, a groove 12g that opens outward is formed by the fixed plate portion 12d, the left side plate portion 12e, and the right side plate portion 12f. The groove 12g is a groove into which the left side portion 32 of the packing 30 fits.

[0037] The right side 14 of the door frame 10 has a structure symmetrical to the left side 12. That is, as shown in FIG. 4, the right side 14 of the door frame 10 has a base plate portion 14a extending in the left-right direction and a vertical plate portion 14b protruding outward from the right end of the base plate portion 14a. The base plate portion 14a is a portion that faces the surface of the waterproof door main body 20 in the door frame 10. The outer surface (outer surface) of the base plate portion 14a is provided with a holder 14c to which the right side portion 34 of the packing 30 is attached. The holder 14c has a fixed plate portion 14d fixed to the outer surface of the base plate portion 14a, a right side plate portion 14e protruding outward from the right end of the fixed plate portion 14d, and a left side plate portion 14f protruding outward from the left end of the fixed plate portion 14d. Inside the holder 14c, a groove 14g that opens outward is formed by the fixed plate portion 14d, the right side plate portion 14e, and the left side plate portion 14f. The groove 14g is a groove into which the right side portion 34 of the packing 30 fits.

[0038] As shown in FIG. 5, the upper side portion 11 of the door frame 10 has a base plate portion 11a extending in the vertical direction and an upper plate portion 11b protruding outward from the upper end of the base plate portion 11a. The base plate portion 11a is a portion of the door frame 10 that faces the surface of the waterproof door main body 20. The outer surface (outer surface) of the base plate portion 11a is provided with a holder 11c to which the upper portion 31 of the packing 30 is attached. The holder 11c has a fixed plate portion 11d fixed to the outer surface of the base plate portion 11a, an upper plate portion 11e protruding outward from the upper end of the fixed plate portion 11d, and a lower plate portion 11f protruding outward from the lower end of the fixed plate portion 11d. Inside the holder 11c, a groove 11g that opens outward is formed by the fixed plate portion 11d, the upper plate portion 11e, and the lower plate portion 11f. The groove 11g is a groove into which the upper portion 31 of the packing 30 fits.

[0039] As shown in FIG. 6, the lower side portion 13 of the door frame 10 has a base plate portion 13a extending in the vertical direction and a lower plate portion 13b protruding outward from the lower end of the base plate portion 13a. The base plate portion 13a is a portion of the door frame 10 that faces the surface of the waterproof door main body 20. The outer surface (outer surface) of the base plate portion 13a is provided with a holder 13c to which the lower portion 33 of the packing 30 is attached. The holder 13c has a fixed plate portion 13d fixed to the outer surface of the base plate portion 13a, a lower plate portion 13e protruding outward from the lower end of the fixed plate portion 13d, and an upper plate portion 13f protruding outward from the upper end of the fixed plate portion 13d. Inside the holder 13c, a groove 13g that opens outward is formed by the fixed plate portion 13d, the lower plate portion 13e, and the upper plate portion 13f. The groove 13g is a groove into which the lower portion 33 of the packing 30 fits.

[0040] In this manner, the upper portion 31 of the packing 30 is attached to the upper side portion 11 by being held by the holder 11c of the upper side portion 11 of the door frame 10. The left side portion 32 of the packing 30 is attached to the left side portion 12 by being held by the holder 12c of the left side portion 12 of the door frame 10. The lower portion 33 of the packing 30 is attached to the lower side portion 13 by being held by the holder 13c of the lower side portion 13 of the door frame 10. The right side portion 34 of the packing 30 is attached to the right side portion 14 by being held by the holder 14c of the right side portion 14 of the door frame 10.

[0041] As shown in FIG. 3, the left side 32 of the packing 30 is formed by stacking a first elastic member 32a having a rectangular cross section fixed to the left side 12 of the door frame 10 and a second elastic member 32b having a rectangular cross section fixed to the surface of the first elastic member 32a opposite to the door frame 10 and in contact with the surface of the waterproof door main body 20 in the closed state. The first elastic member 32a and the second elastic member 32b constituting the packing 30 are both rectangular in cross section and have a simple shape, so that the packing 30 is less expensive than a P-type packing such as the conventional example. In addition, since the first elastic member 32a and the second elastic member 32b are simply stacked, the packing 30 is less expensive than a packing having a laminated structure at multiple locations such as the conventional example.

[0042] The first elastic member 32a and the second elastic member 32b are made of, for example, foamed rubber with a closed cell structure, foamed rubber with semi-closed and semi-open cells, etc. Alternatively, they may be made of a thin-walled packing with a hollow structure. The first elastic member 32a may be made of rubber without bubbles.

[0043] The width dimension of the first elastic member 32a is set to be longer than the thickness dimension of the first elastic member 32a. The width dimension of the second elastic member 32b is set to be longer than the thickness dimension of the second elastic member 32b. Although not shown, when the depth dimension of the groove 12g is longer than the width dimension of the first elastic member 32a, the width dimension of the first elastic member 32a is set to be shorter than the thickness dimension of the first elastic member 32a. The width dimension of the second elastic member 32b may be set to be shorter than the thickness dimension of the second elastic member 32b.

[0044] The thickness of the first elastic member 32a is set to be thicker than that of the second elastic member 32b. For example, the thickness of the second elastic member 32b can be set within a range of 20% to 40% of the thickness of the first elastic member 32a. The thickness of the first elastic member 32a can be set within a range of 7 mm to 20 mm. The thickness of the second elastic member 32b can be set within a range of 2 mm to 6 mm.

[0045] The hardness of the second elastic member 32b is set to be softer than that of the first elastic member 32a. The hardness of the first elastic member 32a can be in the range of 10 degrees to 50 degrees when measured by a measurement method using a type E durometer.

[0046] The second elastic member 32b is arranged so as to be located inside the surface of the waterproof door main body 20 relative to the end 20a of the surface. Specifically, the width (dimension in the left-right direction) of the second elastic member 32b is set narrower than the width of the first elastic member 32a. The relative positional relationship in the left-right direction of the first elastic member 32a and the second elastic member 32b is set so that the right end of the second elastic member 32b coincides with the right end of the first elastic member 32a. When the right end of the second elastic member 32b coincides with the right end of the first elastic member 32a, the left end of the second elastic member 32b is positioned to the right of the left end of the first elastic member 32a, that is, to the right of the end 20a of the waterproof door main body 20, by the amount that the width of the second elastic member 32b is narrow. In order to maintain such a positional relationship, the first elastic member 32a and the second elastic member 32b are integrated together by, for example, a double-sided adhesive tape or a double-sided adhesive tape. The first elastic member 32a and the second elastic member 32b may be integrated with each other by an adhesive.

[0047] Also, the left end of the first elastic member 32a (the end corresponding to the end 20a of the waterproof door main body 20) is arranged to coincide with the end 20a of the waterproof door main body 20. The part of the first elastic member 32a on the door frame 10 side is fitted into a groove 12g in the left side edge part 12 of the door frame 10. The first elastic member 32a is bonded to the inner surface of the groove 12g. The first elastic member 32a is formed so as to protrude outward from the groove 12g in a non-compressed state. In short, the depth of the groove 12g is set to be shallower than the thickness dimension of the first elastic member 32a.

[0048] 4, the right side portion 34 of the packing 30 is formed by laminating a first elastic member 34a having a rectangular cross section fixed to the right side portion 14 of the door frame 10, and a second elastic member 34b having a rectangular cross section fixed to the face of the first elastic member 34a opposite the door frame 10 and in contact with the surface of the waterproof door main body 20 in the closed state. The first elastic member 34a and the second elastic member 34b of the right side portion 34 are configured similarly to the first elastic member 32a and the second elastic member 32b of the left side portion 32.

[0049] 5, the upper part 31 of the packing 30 is formed by laminating a first elastic member 31a having a rectangular cross section fixed to the upper side part 11 of the door frame 10 and a second elastic member 31b having a rectangular cross section fixed to the face of the first elastic member 31a opposite the door frame 10 and in contact with the surface of the waterproof door main body 20 in the closed state. The first elastic member 31a and the second elastic member 31b of the upper part 31 are configured similarly to the first elastic member 32a and the second elastic member 32b of the left side part 32.

[0050] 6, the lower portion 33 of the packing 30 is formed by laminating a first elastic member 33a having a rectangular cross section fixed to the bottom side portion 13 of the door frame 10, and a second elastic member 33b having a rectangular cross section fixed to the surface of the first elastic member 33a opposite the door frame 10 and in contact with the surface of the waterproof door main body 20 in the closed state. The first elastic member 33a and the second elastic member 33b of the lower portion 33 are configured similarly to the first elastic member 32a and the second elastic member 32b of the left side portion 32, but the thickness of the second elastic member 33b is different.

[0051] That is, the thickness of the second elastic member 33b of the lower portion 33 is thicker than the thickness of the second elastic member 31b of the upper portion 31 (the thickness of the second elastic member 32b of the left side portion 32 and the thickness of the second elastic member 34b of the right side portion 34). Specifically, the thickness of the second elastic member 33b of the lower portion 33 is 1.5 times or more the thickness of the second elastic member 31b of the upper portion 31. The upper limit of the thickness of the second elastic member 33b of the lower portion 33 can be 2.5 times or less the thickness of the second elastic member 31b of the upper portion 31.

[0052] When the waterproof door main body 20 is closed by the door closer 40, the surface of the waterproof door main body 20 comes into contact with the second elastic members 31b, 32b, 33b, 34b. The hardness of the second elastic members 31b, 32b, 33b, 34b is set so that they are elastically deformed when pressed by the surface of the waterproof door main body 20 to which the biasing force of the door closer 40 acts. Specifically, the thickness of the second elastic member 33b of the lower part 33 is thicker than the other second elastic members 31b, 32b, 34b, and this relatively thick second elastic member 33b elastically deforms to a thickness of 40% to 60% of the original thickness when the waterproof door main body 20 is closed by the door closer 40. On the other hand, the second elastic members 31b, 32b, 34b elastically deform to a thickness of 70% or more of the original thickness when the waterproof door main body 20 is closed by the door closer 40. Therefore, by simply closing the waterproof door body 20, the sealing effect of the packing 30 can be obtained over the entire periphery of the waterproof door body 20.

[0053] If the other second elastic members 31b, 32b, 34b were made as thick as the second elastic member 33b of the lower part 33, the biasing force of a general door closer 40 would not be able to compress and deform all the second elastic members 31b, 32b, 33b, 34b sufficiently. If the compression amount of the second elastic member 33b of the lower part 33, which is particularly strict in terms of preventing water intrusion, is insufficient, a water pipe is likely to be formed between the lower part 33 and the surface of the waterproof door main body 20, which may lead to a decrease in waterproof performance. In consideration of this, in this embodiment, only the second elastic member 33b of the lower part 33 is made thick.

[0054] FIG. 7 shows a case where low water pressure acts on the waterproof door body 20, such as when the water level outside the waterproof door body 20 is about 300 mm. When water pressure acts, the water from the outside enters between the door frame 10 and the waterproof door body 20 from the end of the waterproof door body 20. When the water level is about 300 mm, even if the waterproof door body 20 is displaced inward by the water pressure, only the second elastic members 31b, 32b, 33b, and 34b are elastically deformed, and the first elastic members 31a, 32a, 33a, and 34a are hardly elastically deformed. When such water pressure acts, the water pressure received by the lower part 33 of the packing 30 is the highest, but the second elastic member 33b of this lower part 33 is relatively thick and is firmly attached to the surface of the waterproof door body 20. Therefore, it is difficult for a water channel to form between the lower part 33 and the surface of the waterproof door body 20, and high waterproof performance is obtained. In other words, at low water pressure, sufficient waterproof performance can be obtained simply by the elastic deformation of the second elastic members 31b, 32b, 33b, and 34b.

[0055] 8 shows a case where high water pressure acts on the waterproof door body 20 such that the water level outside the waterproof door body 20 is 1m or more. When high water pressure acts on the waterproof door body 20, the amount of inward displacement of the waterproof door body 20 becomes larger than that at low water pressure, so the surface of the waterproof door body 20 strongly presses the packing 30. When the packing 30 is strongly pressed by the waterproof door body 20, the first elastic members 31a, 32a, 33a, 34a and the second elastic members 31b, 32b, 33b, 34b are elastically deformed together. At this time, since the second elastic members 31b, 32b, 33b, 34b are thin and soft, the second elastic members 31b, 32b, 33b, 34b are crushed and embedded in the first elastic members 31a, 32a, 33a, 34a.

[0056] Since the second elastic members 31b, 32b, 33b, 34b are arranged so as to be located inside the surface of the waterproof door main body 20 relative to the end 20a of the surface, water is less likely to get in between the second elastic members 31b, 32b, 33b, 34b and the surface of the waterproof door main body 20. Also, the second elastic members 31b, 32b, 33b, 34b buried in the first elastic members 31a, 32a, 33a, 34a are not directly subjected to high water pressure, and it is the first elastic members 31a, 32a, 33a, 34a that are relatively hard and do not easily deform even under high water pressure that directly receive high water pressure, so that a water channel is less likely to be formed between the waterproof door main body 20 and the second elastic members 31b, 32b, 33b, 34b. Furthermore, since the packing 30 is made up of the first elastic members 31a, 32a, 33a, 34a and the second elastic members 31b, 32b, 33b, 34b, each of which has a rectangular cross section, the packing does not have a narrow contact area due to a curved surface like the conventional P-type packing, but has a wide surface contact with the surface of the waterproof door main body 20, which also makes it difficult for a water leak to be formed between the packing and the waterproof door main body 20.

[0057] Conventional waterproof doors require the door body to be tightly fastened to the door frame using a cremone handle or the like, but the waterproof door structure 1 according to this embodiment can prevent water from entering due to high water pressure only with the biasing force of the door closer 40. The waterproof door structure 1 according to this embodiment has the ability to prevent water from entering even at a water level of 3m.

[0058] According to experimental results, the waterproof door structure 1 according to this embodiment has a water leakage rate of 1 liter / m2 or less per hour when the set flood height is 0.3m to 3m. The waterproof performance of the waterproof door structure 1 according to this embodiment is equivalent to Ws-6 in the JIS A 4716 flood prevention performance grade and to HWL-5 in the JSTM flood prevention door flood prevention performance standard, so the waterproof door structure 1 according to this embodiment has sufficient waterproof performance. This waterproof performance is for an opening dimension of 900mm x 2100mm, but similar waterproof performance can be obtained even if the opening dimension is changed.

[0059] 9, the second elastic member 33b provided on the bottom edge portion 13 of the door frame 10 is continuous from the left side edge portion (one side edge portion) 12 to the right side edge portion (the other side edge portion) 14 of the door frame 10. In FIG. 9, the lower portion of the packing 30 is shown in an enlarged manner, and the second elastic member 33b of the lower portion 33 of the packing 30 is continuous from the left end portion to the right end portion of the packing 30.

[0060] That is, in the waterproof door structure 1 of this embodiment, the waterproof door main body 20 is structured to rotate by the hinge 21, so when the waterproof door main body 20 is opened, the waterproof door main body 20 moves from the position shown by the imaginary line to the position shown by the solid line in FIG. 10. In this way, the part of the waterproof door main body 20 on the hinge 21 side moves so as to rub against the second elastic member 33b with the opening operation. If the waterproof door main body 20 rubs against the edge portion 33c (only shown in FIG. 10) of the second elastic member 33b, there is a risk that the second elastic member 33b will peel off from the edge portion 33c, but in this embodiment, since the second elastic member 33b is continuous across both ends in the left-right direction, the waterproof door main body 20 does not rub against the edge portion 33c of the second elastic member 33b, and peeling of the second elastic member 33b from the edge portion 33c can be suppressed and sufficient waterproof performance can be obtained.

[0061] As described above, according to the waterproof door structure 1 of this embodiment, the packing 30 is constructed by stacking the first elastic members 31a, 32a, 33a, 34a and the second elastic members 31b, 32b, 33b, 34b each having a rectangular cross section, so that the packing 30 has a simple structure and can be manufactured at a low cost. The first elastic members 31a, 32a, 33a, 34a are made thicker than the second elastic members 31b, 32b, 33b, 34b, and the second elastic members 31b, 32b, 33b, 34b are also made softer than the first elastic members 31a, 32a, 33a, 34a, and the second elastic members 31b, 32b, 33b, 34b are arranged to be located inside the end 20a of the waterproof door main body 20, so that sufficient waterproof performance can be obtained not only when low water pressure is applied but also when high water pressure is applied, without using a cremone handle or the like.

[0062] Second embodiment FIG. 11 is a schematic diagram of a second embodiment in which a door frame 10 that is not fixed to a structure, a waterproof door main body 20 that is rotatably supported on the door frame 10 via a hinge 21, and a packing 30 in which a first elastic member (not shown in FIG. 11) and a second elastic member (not shown in FIG. 11) similar to the waterproof door structure 1 according to the first embodiment are laminated are applied to a safe 100. In the second embodiment, sufficient waterproof performance can be obtained not only when low water pressure is applied but also when high water pressure is applied. The door frame 10 is provided in the main body part (e.g., a housing) of the safe 100. Similarly, sufficient waterproof performance can be obtained even when the waterproof door structure 1 according to the first embodiment is applied to the door of a device that manages documents and important keys, the door of a case that stores electronic devices, etc.

[0063] The above-described embodiment is merely illustrative in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0064] As described above, the waterproof door structure according to the present disclosure can be used to prevent water from entering various structures. [Explanation of symbols]

[0065] 1. Waterproof door structure 10 Door Frame 11 Top 13 Bottom 12g groove 20 Waterproof door body 30 Packing 31a, 32a, 33a, 34a First elastic member 31b, 32b, 33b, 34b Second elastic member 40 Door closer (force generating device) 100 structures

Claims

1. A waterproof door structure comprising a door frame fixed to a structure, a waterproof door body rotatably supported by the door frame via a hinge, and a packing interposed between the door frame and one surface of the waterproof door body and continuous in the circumferential direction of the waterproof door body, the waterproof door structure preventing water from entering from the side where the other surface of the waterproof door body is located, The packing is formed by laminating a first elastic member having a rectangular cross section fixed to a portion of the door frame facing one side of the waterproof door body, and a second elastic member having a rectangular cross section fixed to a surface of the first elastic member opposite the door frame and in contact with one side of the waterproof door body in a closed state, The hardness of the second elastic member is set to be softer than that of the first elastic member, A waterproof door structure, wherein the second elastic member is positioned so as to be contained inside one surface of the waterproof door body relative to an end of the one surface.

2. The waterproof door structure according to claim 1, A waterproof door structure, wherein the thickness of the first elastic member is set to be thicker than that of the second elastic member.

3. The waterproof door structure according to claim 1, A waterproof door structure, wherein a groove is provided in a portion of the door frame facing one side of the waterproof door main body, into which a portion of the first elastic member on the door frame side fits.

4. In the waterproof door structure according to claim 3, A waterproof door structure, wherein the first elastic member is formed to protrude from the groove in an uncompressed state.

5. The waterproof door structure according to claim 1, A biasing force generating device is provided to bias the waterproof door body in a closing direction, A waterproof door structure, wherein the hardness of the second elastic member is set so as to elastically deform when pressed by one surface of the waterproof door body to which the biasing force of the biasing force generating device acts.

6. The waterproof door structure according to claim 1, A waterproof door structure, wherein the thickness of the second elastic member provided on the lower edge portion of the door frame is set to be thicker than the thickness of the second elastic member provided on the upper edge portion of the door frame.

7. The waterproof door structure according to claim 1, A waterproof door structure, wherein the second elastic member provided at the lower edge portion of the door frame is continuous from one side edge portion to the other side edge portion of the door frame.

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