Water cut-off structure

Abstract

To provide a water cut-off structure for realizing a waterproof door that does not require any installation work before use and does not require any special force to close the door.SOLUTION: A water cut-off structure includes: a hanging side structure in which when a door is closed in a non-submerged state where the door is not under water pressure, an elastic water-stopping member on the hanging side of a vertical frame of a door frame is compressed with a pressure that provides water-tightness between the door and the elastic water-stopping member; a door edge side structure in which when the door is closed in the non-submerged state, the door edge elastic water-stopping member provided on the door edge side vertical frame of the door frame is compressed between the door and the member at a pressure lower than the contact pressure at which the elastic force that allows the door to be easily closed by hand is generated, or does not come into contact with the door; and a lower frame side structure in which when the door is closed in the non-submerged state, a lower frame elastic water-stopping member provided in the lower frame of the door frame contacts or does not contact with the door due to a pressure gradient from the compression pressure on the hanging side structure to the compression pressure on the door side structure or to a non-contact state, wherein the door is permitted to rotate in order to compress the elastic water-stopping member on the door leading edge side to a state in which water pressure enables the door to exhibit water-tightness when closed in a water flooded state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a water stop structure for preventing flooding through an opening door.

Background Art

[0002] Conventionally, various water stop devices have been proposed to suppress flood damage to buildings and the like in case of rainfall exceeding the drainage capacity.

[0003] Among them, a retrofit water stop device that can impart the function of a water stop door to a door without a water stop function does not require the work of replacing the door and door frame itself with a water stop door, so the cost and labor required for flood countermeasures for existing opening doors can be significantly reduced (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the above-mentioned conventional water stop device has a problem that an elastic material for preventing flooding from the gap of the door frame needs to be constantly clamped between the door, which requires force to close the door and is not suitable for daily use.

[0006] In addition, as a water stop device in which such a point is improved, for example, as disclosed in Japanese Unexamined Patent Application Publication No. 2019-100121, when imparting a water stop function, it is attached to the door and can be removed usually.

[0007] However, such a water stop device requires an attachment operation in advance, which is of course complicated when flood damage is expected.

[0008] The present invention has been made in view of such circumstances, and provides a water stop structure for realizing a water stop door that does not require prior installation work during use and does not require special force for closing the door and is suitable for daily use.

Means for Solving the Problems

[0009] In order to solve the above conventional problems, in the water stop structure according to the present invention, (1) it is a water stop structure that prevents water intrusion from the gaps of the door frame at least at the left, right, and lower three sides of the closed opening door along the same periphery by an elastic water stop member arranged along the same periphery. When the door is closed in a non-flooded state where the door is not subjected to water pressure, the suspension-side elastic water stop member arranged on the suspension-side vertical frame of the door frame is compressed with a pressure that exhibits watertightness between the door and the suspension-side structure, and when the door is closed in a non-flooded state, the door-tip-side elastic water stop member arranged on the door-tip-side vertical frame of the door frame is compressed with a pressure below the contact pressure that generates an elastic force that can be easily closed by hand between the door and the door-tip-side structure that does not contact the door, and when the door is closed in a non-flooded state, the lower-frame elastic water stop member arranged on the lower frame of the door frame is a lower-frame-side structure that contacts or does not contact the door with a pressure gradient from the compression pressure in the suspension-side structure to the compression pressure or non-contact state in the door-tip-side structure from the suspension side to the door tip side, and moreover, when the door is closed in a flooded state, rotation of the door is allowed to compress the door-tip-side elastic water stop member to a state where watertightness is exhibited by water pressure.

[0010] Moreover, the water stop structure according to the present invention also has the following features. (2) Each of the elastic water stop members is arranged on the door frame so as to abut inside the region facing the door stop of the door frame of the door when the door is closed in a flooded state. (3) The suspension-side elastic water stop member is arranged at a position on the door-tip-side facing surface of the suspension-side vertical frame that does not contact the suspension-side corner when the door is opened and closed. (4) An auxiliary water stop member is provided to prevent water intrusion from the gap of the door frame when the door is flooded with a water pressure less than the water pressure at which the watertightness of the door-tip-side elastic water stop member is exhibited. Providing contact pressure adjusting means for adjusting the contact pressure of each of the elastic water stop members against the door.

Advantages of the Invention

[0011] According to the water stop structure of the present invention, it is a water stop structure that prevents water intrusion from the gaps of the door frame at at least the left, right, and lower three peripheral edges of the closed opening door by elastic water stop members arranged along the same peripheral edge. When the door is closed in a non-flooded state where the door is not subjected to water pressure, the suspension-side elastic water stop member arranged on the suspension-side vertical frame of the door frame is compressed at a pressure that exhibits watertightness between the door and the suspension-side structure. When the door is closed in a non-flooded state, the door-tip-side elastic water stop member arranged on the door-tip-side vertical frame of the door frame is compressed between the door and the door at a pressure below the contact pressure that generates an elastic force that can be easily closed by hand or does not contact the door. The door-tip-side structure, when the door is closed in a non-flooded state, the lower-frame elastic water stop member arranged on the lower frame of the door frame has a lower-frame-side structure that contacts or does not contact the door with a pressure gradient from the compression pressure in the suspension-side structure to the compression pressure or non-contact state in the door-tip-side structure from the suspension side to the door-tip side. Moreover, if rotation of the door is allowed to compress the door-tip-side elastic water stop member to a state where watertightness is exhibited by water pressure when the door is closed in a flooded state, it is possible to provide a water stop structure that does not require prior installation work during use and realizes a water stop door suitable for daily use without requiring special force for closing the door.

[0012] In addition, each of the elastic water stop members is arranged on the door frame so as to contact inside a region facing the door stop of the door frame of the door when the door is closed in a flooded state, so that water intrusion can be more firmly prevented.

[0013] In addition, the suspension-side elastic water stop member is arranged at a position that does not contact the suspension-side corner when the door is opened and closed on the door-tip-side facing surface of the suspension-side vertical frame, so that deterioration of the suspension-side elastic water stop member due to contact with the corner of the door can be prevented.

[0014] In addition, since an auxiliary water stop member is provided to prevent water from entering through the gap of the door frame when the door is flooded at a water pressure lower than the water pressure at which the watertightness of the door end side elastic water stop member is exerted, water ingress can be prevented as much as possible even at low water pressure.

[0015] In addition, since contact pressure adjusting means for adjusting the contact pressure of each elastic water stop member against the door is provided, the contact pressure between each elastic water stop member and the door can be easily adjusted.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0017] The present invention relates to a water stop structure that prevents water from entering through the gaps in the door frame at at least the three peripheral edges of the left, right, and lower sides of a closed hinged door by means of elastic water stop members arranged along the same peripheral edge. It is not necessary to perform prior installation work during use, and it provides a water stop structure for realizing a water stop door that is suitable for daily use without requiring special force to close the door.

[0018] The water stop structure according to this embodiment may be adopted as the structure of a newly made hinged door, but it may also be adopted to impart a water stop function to an already installed hinged door, for example, a normal hinged door that does not have the function of preventing water ingress. Particularly in the latter case, compared with the case of performing large-scale construction such as removing an existing hinged door and replacing it with a water stop door or processing an existing door frame, water ingress countermeasures can be carried out inexpensively and promptly.

[0019] Also, the hinged door may be a single-leaf hinged door, but it may also be a double-leaf hinged door such as a double-action door or a double-leaf parent-child door. In this case, the edge on the mating portion side of one door functions as the door frame of the other door.

[0020] Also, the material of the hinged door is not particularly limited as long as it can ensure watertightness. For example, a steel door is suitable.

[0021] Also, the hinged door to which the water stop structure according to this embodiment should be adopted is a hinged door in which the pressurizing direction of the water pressure of the water trying to enter during a water level rise on the door and the closing direction of the door coincide. Hereinafter, such a hinged door is also referred to as a pressure-closed hinged door.

[0022] And, the characteristic points of the water stop structure according to this embodiment include having a predetermined hanging end side structure, a door tip side structure, and a lower frame side structure.

[0023] The hanging end side structure is a structure in which, when the door is closed in a non-flooded state where the door is not receiving water pressure, the hanging end side elastic water stop member arranged on the hanging end side vertical frame of the door frame is compressed by a pressure that exhibits watertightness between the door and the member.

[0024] Here, the non-flooded state where the door is not subjected to water pressure means a state where water has not reached the door. More specifically, for example, it means the normal state.

[0025] Also, when the door is closed, it means a state where the door is contained within the door frame. In particular, it can be understood as a state where the door is contained within the door frame in a state where a latch bolt or dead bolt can be locked on the strike side.

[0026] Also, compression at a pressure that exhibits watertightness means, for example, when the height of the upper end position of the suspension-side elastic waterstop member is lower than the height (height of the through-hole portion on both sides) where the handle or lock of the door is installed, it is the case when water presses against the door up to the height of the upper end position of the suspension-side elastic waterstop member. When the height of the upper end position of the suspension-side elastic waterstop member is higher than the height of the through-hole portion on both sides, it means compressing the elastic waterstop member with a pressure such that there is no water ingress from the gap of the door frame even when water presses against the door up to at least the height of the through-hole portion on both sides.

[0027] The door tip side structure is a structure in which, when the door is closed in the non-flooded state, the door tip side elastic waterstop member disposed on the door tip side vertical frame of the door frame is compressed with a pressure below the contact pressure that generates an elastic force that can be easily closed by hand or does not contact the door.

[0028] The contact pressure that generates an elastic force that can be easily closed by hand means not a contact pressure where the repulsive force from the door tip side elastic waterstop member is too strong to close the door without bracing when closing the door, but a contact pressure that generates a repulsive force to the extent that smooth opening and closing is possible considering the weight and size derived from the material of the door.

[0029] To give a specific example for the sake of understanding, for example, a contact pressure that generates a repulsive force to the extent that the door can be closed by inertia even when the hand is released during door closing or can be closed by the force of a door closer is assumed.

[0030] The door tip side elastic water stop member compressed between the door and the pressure below the contact pressure (easy closing pressure) that generates an elastic force that can be easily closed by hand may or may not exhibit watertightness at the time of closing the door in the non-submerged state.

[0031] Also, at the time of closing the door in the non-submerged state, the door tip side elastic water stop member may not be in contact and may not be receiving the compressive force from the door.

[0032] The lower frame side structure is a structure in which, when closing the door in the non-submerged state, the lower frame elastic water stop member disposed on the lower frame of the door frame contacts or does not contact the door with a pressure gradient from the suspension side structure's compression pressure to the door tip side structure's compression pressure or a non-contact state from the suspension side to the door tip side.

[0033] That is, the lower frame elastic water stop member in the lower frame side structure is not pressurized with a uniform pressure from the suspension side to the door tip side when closing the door in the non-submerged state, but is pressurized with different pressures from the pressure at which watertightness can be exhibited to a pressure below the easy closing pressure or a non-pressurized state.

[0034] And, as a further feature of the water stop structure according to the present embodiment, rotation of the door is allowed to compress the door tip side elastic water stop member to a state where watertightness is exhibited by water pressure when closing the door in a state where the door is submerged.

[0035] That is, the door is left with a rotation allowance to be further pushed into the door frame side (in the door closing direction) against the elastic force of the door tip side elastic water stop member, and when the door is pushed in by water pressure using this rotation allowance, the door tip side elastic water stop member is compressed with a pressure that exhibits watertightness. Such a rotation allowance can utilize, for example, the gap provided as play between the door and the door frame in a normal opening and closing door device. At that time, if there is a spacer (door stopper cushion) or the like for maintaining the gap, the rotation will be restricted, so removing this can secure the rotation allowance.

[0036] Thus, in the water stop structure according to this embodiment, it includes the predetermined suspension side structure, door tip side structure, and lower frame side structure as described above, and further includes a clearance structure that allows further rotation by the rotation allowance and exhibits watertightness when water pressure is applied. Therefore, it is not necessary to perform prior installation work during use, and it is possible to provide a water stop structure for realizing a water stop door that is suitable for daily use without requiring special force for closing the door.

[0037] Note that although not particularly limited, when the door is closed in a non-flooded state, it is desirable that the door is in a state of being accommodated parallel to the door frame. That is, usually, the door is accommodated parallel to the door frame like a general hinged door, so that not only the usability but also the appearance is the same as that of a normal hinged door, and it is possible to prevent a visual sense of incongruity from occurring.

[0038] In addition, it should be noted that when the door tip side elastic water stop member is compressed to a state where watertightness is exhibited by water pressure, that is, when the door is closed in a flooded state, it is desirable that the door is in a state where the door tip side is further pushed into the door frame and is slightly obliquely accommodated. By being in such a state, watertightness can be firmly exhibited.

[0039] Hereinafter, the water stop structure according to this embodiment will be further described with reference to the drawings. In the following description, for example, as shown in Fig. 1(a), the area where flooding is expected or the area that has already been flooded is referred to as the flooded area, and the area where it is desired to suppress flood damage is referred to as the protected area. That is, the hinged door adopting the water stop structure according to this embodiment is arranged at the boundary between the flooded area and the protected area (hereinafter, also referred to as the water stop boundary).

[0040] In addition, in the description of the door and each part, as shown in Fig. 1(a), the direction from the flooded area to the protected area is also referred to as the front-rear direction, the width direction of the door or the like is referred to as the left-right direction, and as shown in Fig. 1(b), the height direction of the door or the like is also referred to as the up-down direction. Also, for the convenience of explanation, the front-rear direction may sometimes be referred to as the direction of people entering and leaving or the opening and closing direction of the door (door opening direction, door closing direction).

[0041] FIG. 1 is an explanatory view showing a water stop door device 10. FIG. 1(a) is an explanatory view showing the X-X cross section of FIG. 1(b), and FIG. 1(b) is a front view of the water stop door device 10 seen from the protection area side.

[0042] The water stop door device 10 is a pressure-closed type door device to which the water stop structure S according to the present embodiment is applied by retrofitting a water stop component 11 to an existing steel fire door device having no water stop function.

[0043] As shown in FIGS. 1(a) and 1(b), the water stop door device 10 is composed of a door frame 12, a door 13, a door closer 16, and a water stop component 11.

[0044] The door frame 12 is a frame for accommodating a door 13 that can be freely opened and closed, and is installed through a wall 14. As shown in FIG. 1(b), it includes a suspension-side vertical frame 12a and a door-tip-side vertical frame 12b that extend in the vertical direction, and a lower frame 12c and an upper frame 12d that extend in the horizontal direction.

[0045] The door 13 is a member for closing the inner opening of the door frame 12. In the present embodiment, as shown in FIG. 1(a), it is swingably attached to the suspension-side vertical frame 12a on the right side of the drawing via a hinge 15.

[0046] The door closer 16 is a device for slowly and automatically closing the door 13 by hydraulic pressure, and the door 13 is biased in the closing direction by the door closer 16.

[0047] The water stop component 11 is a member for preventing water from entering through the gaps in the door frame at the three peripheral edges of the left, right, and bottom when the door 13 is closed. It is composed of a suspension-side elastic water stop member 11a disposed on the suspension-side vertical frame 12a, a door-tip-side elastic water stop member 11b disposed on the door-tip-side vertical frame 12b, and a lower-frame elastic water stop member 11c disposed on the lower frame 12c.

[0048] Incidentally, the water stop structure S is composed of a suspension side structure S1 constructed by the suspension side vertical frame 12a, the suspension side edge 13a of the door 13, and the suspension side elastic water stop member 11a, a door end side structure S2 constructed by the door end side vertical frame 12b, the door end side edge 13b of the door 13, and the door end side elastic water stop member 11b, and a lower frame side structure S3 constructed by the lower frame 12c, the lower side edge 13c of the door 13, and the lower frame elastic water stop member 11c.

[0049] Figure 2 is an explanatory diagram showing the configuration of the suspension side structure S1 and the door end side structure S2, with the left - right direction of the door 13 and the space between the suspension side vertical frame 12a and the door end side vertical frame 12b omitted.

[0050] As shown in Figure 2, the opening 17 formed inside the door frame 12 (toward the center of the paper) has a substantially half - part on the immersion area side with an opening width approximately the same as the left - right width of the door 13 as the immersion side opening 17a, and a substantially half - part on the protection area side with an opening width shorter than the left - right width of the door 13 as the protection side opening 17b.

[0051] Both the immersion side opening 17a and the protection side opening 17b function as the bay width for the passage between the immersion area and the protection area. In particular, the immersion side opening 17a also has the function of a door accommodation part where the water stop door device 10 is accommodated when the door is closed.

[0052] Also, a step part 17c is formed at the boundary between the immersion side opening 17a and the protection side opening 17b due to the difference in opening width and opening height, and the surface of the step part 17c facing the immersion area side is the door contact surface 17d.

[0053] The suspension side structure S1 shown on the right side of Figure 2 is composed of the suspension side vertical frame 12a of the door frame 12 as described above, the suspension side elastic water stop member 11a arranged on the suspension side vertical frame 12a among the water stop parts 11, and the suspension side edge 13a of the door 13, and their cooperation enables the function to be exerted.

[0054] The suspension-side elastic water stop member 11a is disposed on the surface of the inner side of the door frame 12 (including the door contact surface 17d; hereinafter also referred to as the inner peripheral surface) that constitutes the protection-side opening 17b (also referred to as the protection-side inner peripheral surface), and is disposed on the surface of the portion of the suspension-side vertical frame 12a (hereinafter referred to as the protection-side suspension-side inner peripheral surface 18a), and is fixed by screws 19.

[0055] Similarly, the door tip-side structure S2 shown on the left side of FIG. 2 is composed of the door tip-side vertical frame 12b of the door frame 12, the door tip-side elastic water stop member 11b disposed on the door tip-side vertical frame 12b among the water stop parts 11, and the door tip-side edge 13b of the door 13, and functions are exerted by their cooperation. The door tip-side elastic water stop member 11b is disposed on the protection-side inner peripheral surface of the door frame 12 and on the surface of the portion of the door tip-side vertical frame 12b (hereinafter referred to as the protection-side door tip inner peripheral surface 18b), and is fixed by screws 19.

[0056] Here, the structure of the suspension-side elastic water stop member 11a will be described with reference to FIG. 3. Since the structure of the door tip-side elastic water stop member 11b is substantially the same as that of the suspension-side elastic water stop member 11a, the description thereof will be omitted.

[0057] As shown in FIG. 3(a), the suspension-side elastic water stop member 11a is composed of a long substrate member 20 having a substantially L-shaped cross section in a sectional view, a similarly long support member 21 having a substantially U-shaped cross section in a sectional view, and a similarly long elastic seal member 22 having a substantially rectangular cross section in a sectional view.

[0058] The construction of the suspension-side elastic waterstop member 11a is as follows: First, on the wide surface 20a on the inner side of the bend of the substrate member 20, the bottom surface 21a of the support member 21 is arranged along the longitudinal direction while facing it. At this time, the support member 21 is arranged closer to the inner side by a predetermined width d1 (closer to the narrow surface 20b) from the edge of the wide surface 20a, and a seal member arrangement margin 20c is formed along the edge. Note that the predetermined width (the width of the seal member arrangement margin) d1 is smaller than the width d2 of the elastic seal member 22 (d1 < d2), and is also smaller than the maximum width d3 at which the elastic seal member 22 can exhibit watertightness due to compression from the door 13 (d1 < d3 < d2). In this embodiment, an elastic seal member 22 with a width d2 of 10 mm in the free state and a maximum width d3 of 9 mm at which watertightness can be exhibited is adopted, and the predetermined width (the width of the seal member arrangement margin) d1 is 5 mm.

[0059] Next, as shown in Fig. 3(b), by arranging the elastic seal member 22 in the seal member arrangement margin 20c, the suspension-side elastic waterstop member 11a is constructed.

[0060] The attachment of the suspension-side elastic waterstop member 11a to the inner peripheral surface 18a of the protective-side suspension end is performed by inserting a screw 19 into a screw hole 23 formed in the suspension-side elastic waterstop member 11a, as shown in the lower right of Fig. 4.

[0061] Also, as shown in the upper right of Fig. 4, the screw hole 23 is a long hole with the longitudinal direction in the front-rear direction. Therefore, as shown by the broken line in the lower right of Fig. 4 for the suspension-side elastic waterstop member 11a, it is possible to easily adjust the attachment position in the front-rear direction of the suspension-side elastic waterstop member 11a with respect to the inner peripheral surface 18a of the protective-side suspension end. Hereinafter, this configuration is referred to as the front-rear position adjustment mechanism.

[0062] Also, the configuration of the door tip-side elastic waterstop member 11b and the attachment of the same door tip-side elastic waterstop member 11b to the inner peripheral surface 18b of the protective-side door tip are the same as the configuration of the suspension-side elastic waterstop member 11a described above and the attachment of the same suspension-side elastic waterstop member 11a to the inner peripheral surface 18a of the protective-side suspension end, and the attachment position in the front-rear direction of the door tip-side elastic waterstop member 11b can be easily adjusted by the front-rear position adjustment mechanism.

[0063] FIG. 5 is an explanatory view showing the structure of the water stop door device 10 when the door is closed in a non-flooded state. As shown in the lower diagram of FIG. 5, when the door is closed in a non-flooded state, the door 13 is accommodated parallel to the door frame 12 with a certain gap d4 between both the suspension side and the door tip side and the door contact surface 17d.

[0064] Also, on the suspension side, as shown in the upper right diagram of FIG. 5, the suspension side elastic water stop member 11a disposed on the suspension side vertical frame 12a of the door frame 12 is compressed by a pressure that exhibits watertightness between the suspension side edge 13a of the door 13, and the suspension side structure S1 is constructed.

[0065] In other words, due to the pressure received from the door 13 when the door is closed in a non-flooded state (for example, the biasing force from the door closer 16), the attachment position of the suspension side elastic water stop member 11a using the front-rear position adjustment mechanism is adjusted so that the width of the elastic seal member 22 becomes the width d5 at which watertightness is sufficiently exhibited, that is, the protruding position with respect to the door 13 is adjusted. In the present embodiment, the width d5 at which the watertightness of the suspension side structure S1 is sufficiently exhibited is set to 8 mm compressed by 2 mm from the width d2 = 10 mm of the elastic seal member 22 in the free state when the door is closed. This is a state further compressed than the width d3 = 9 mm when the above-described watertightness can be exhibited.

[0066] Also, in the suspension side structure S1, the suspension side elastic water stop member 11a is disposed on the protective side suspension inner peripheral surface 18a of the door frame 12 so as to contact inside the facing region with the door contact surface 17d of the door 13 when the door is closed, realizing a more reliable water stop compared to the case where the elastic seal member 22 is disposed on the door contact surface 17d to stop water.

[0067] Also, in the suspension side structure S1, as shown in FIG. 6, the arrangement position of the suspension side elastic water stop member 11a is set to a position (non-contact position) that does not contact the suspension side corner 13e when the door 13 is opened and closed on the inner peripheral surface (door tip side orientation surface) of the suspension side vertical frame 12a, or a position (light contact position) where the elastic seal member 22 lightly touches without being greatly twisted even if it contacts.

[0068] More specifically, in the case of a non-contact position, the elastic seal member 22 does not contact the rotation locus (shown by the dashed line) of the hanging-side corner portion 13e when the door 13 is opened and closed. Moreover, the position of the hanging-side elastic water-stop member 11a is adjusted by the front-rear position adjustment mechanism so that it is compressed to a width (corner non-contact · normal water-tightness exhibition width) d5 = 8 mm at which sufficient water-tightness is exhibited when the door is closed.

[0069] According to such a configuration, it is possible to prevent the elastic seal member 22 from being twisted and deteriorated due to contact with the hanging-side corner portion 13e accompanying the rotation of the door 13. Further, the elastic seal member 22 is compressed toward the protection region side substantially perpendicular to the contact surface of the elastic seal member 22 by the hanging-side edge 13a substantially parallel in the left-right direction. Therefore, water leakage can be firmly prevented by uniform compression.

[0070] In this way, the front-rear position adjustment mechanism is made to function as contact pressure adjustment means for adjusting the contact pressure of the hanging-side elastic water-stop member 11a with respect to the door 13, thereby constructing the hanging-side structure S1.

[0071] On the other hand, on the door tip side, as shown in the upper left figure of FIG. 5, the door tip side elastic water-stop member 11b disposed on the door tip side vertical frame 12b of the door frame 12 is compressed at a pressure below the self-closing pressure between it and the door tip side edge 13b of the door 13, and the door tip side structure S2 is constructed.

[0072] In other words, due to the pressure received from the door 13 when the door is closed in a non-flooded state (for example, the biasing force from the door closer 16), the width of the elastic seal member 22 is such that a biasing force smaller than the biasing force of the door closer and the repulsive force within the limit that can be easily latched by hand is generated, and when it rotates within the range of the rotation allowance described later during flooding, it becomes a width d6 (normal easy-to-close and flood-tight width during flooding) that can exhibit sufficient watertightness. Thus, the attachment position of the door tip side elastic water stop member 11b is adjusted using the front-rear position adjustment mechanism (contact pressure adjustment means), that is, the protrusion position with respect to the door 13 is adjusted. In this embodiment, the normal easy-to-close and flood-tight width d6 during flooding is set to 9.9 mm compressed by 0.1 mm from the width d2 = 10 mm of the elastic seal member 22 in the free state when the door is closed. This is a width such that when the elastic seal member 22 rotates within the range of the rotation allowance (d4 = 3 mm) described later, for example, when it rotates 0.9 mm or more in the door closing direction, the maximum width d3 = 9 mm or less at which the elastic seal member 22 can exhibit watertightness is achieved.

[0073] Also, in the door tip side structure S2 as well, the door tip side elastic water stop member 11b is disposed on the inner peripheral surface 18b of the protection side door tip of the door frame 12 so as to contact inside the opposing region with the door contact surface 17d of the door 13 when the door is closed, achieving a more reliable water stop compared to the case where the elastic seal member 22 is disposed on the door contact surface 17d for water stop.

[0074] Also, the gap d4 of the door tip side structure S2 also functions as the rotation allowance 24 for exhibiting watertightness when the door is closed in a flooded state. That is, when the door is closed in a non-flooded state, in the door tip side structure S2, the door 13 is in a state where watertightness is exhibited by water pressure, that is, the rotation of the door 13 for compressing the elastic seal member 22 of the door tip side elastic water stop member 11b to d3 = 9 mm or less is allowed.

[0075] Next, the lower frame side structure S3 will be described with reference to FIG. 7. FIG. 7 is an explanatory diagram showing the configuration of the lower frame side structure S3. FIG. 7(a) is an explanatory diagram showing a partial omission of the Y - Y cross-section of FIG. 1(b), and FIG. 7(b) is an exploded explanatory diagram showing the vicinity of the lower frame 12c of FIG. 7(a) with the door 13 omitted.

[0076] As shown in Fig. 7(a), the lower frame side structure S3 is composed of the lower frame 12c of the door frame 12, the lower frame elastic water stop member 11c disposed on the lower frame 12c among the water stop parts 11, and the lower side edge 13c of the door 13, and functions are exerted by their cooperation.

[0077] As shown in Fig. 7(b), the lower frame elastic water stop member 11c is composed of a substrate member 30 which is long and bent into a substantially J-shaped cross section, a support member 31 which is also long and substantially U-shaped in cross section, and an elastic seal member 22 which is also long and substantially rectangular in cross section.

[0078] The construction of the lower frame elastic water stop member 11c is carried out by combining the substrate member 30, the support member 31, and the elastic seal member 22 while aligning them along the longitudinal direction, similar to the construction of the above-mentioned suspension-side elastic water stop member 11a.

[0079] The lower frame elastic water stop member 11c combined in this way is disposed on the inner peripheral surface of the protection side of the door frame 12 at the portion of the lower frame 12c (hereinafter referred to as the protection side lower frame inner peripheral surface 18c), as shown in Figs. 7(a) and 7(b), and is fixed by screws 19.

[0080] Further, on the bottom surface 31a of the support member 31, a long hole-shaped screw hole 31b is formed at a position opposite to the screw hole 30a provided in the substrate member 30, and the front-rear mounting position of the elastic seal member 22 with respect to the support member 31 and the lower frame 12c fastened by the screw 19 can be easily adjusted together with the support member 31. That is, the lower frame side structure S3 is also provided with a front-rear position adjustment mechanism, which is also configured to function as a contact pressure adjustment means.

[0081] And as a feature of the lower frame side structure S3, the elastic seal member 22 is configured to contact the door with a pressure gradient from the suspension side to the door tip side and from the compression pressure in the suspension side structure to the compression pressure in the door tip side structure.

[0082] FIG. 8 is an explanatory view conceptually showing the compressed states of the elastic seal members 22 respectively disposed on the suspension-side elastic water stop member 11a, the door-tip-side elastic water stop member 11b, and the lower frame elastic water stop member 11c when the door is closed in a non-submerged state. In FIG. 8, the degree of compression of the elastic seal member 22 in each water stop member is indicated by shading. The greater the pressure received from the door 13 and the higher the degree of compression, the darker the color (black); conversely, the smaller the pressure received from the door 13 and the lower the degree of compression, the lighter the color (white).

[0083] The compressed state of the elastic seal member 22 when the door is closed in a non-submerged state in the suspension-side structure S1 is a state compressed with a corner non-contact and normal watertight performance width d5 = 8 mm as described above. Since this is a width at which watertightness is sufficiently exhibited even when the door is closed in a non-submerged state, as shown in FIG. 8, it is in a highly compressed state indicated by a dark color (black).

[0084] Also, the compressed state of the elastic seal member 22 when the door is closed in a non-submerged state in the door-tip-side structure S2 is a state compressed with a normal easy-closing and watertight performance width d6 = 9.9 mm when submerged as described above. This is a situation where the door 13 is lightly in contact with the elastic seal member 22, and as shown in FIG. 8, it is in a low-compression state indicated by a light color (white).

[0085] And, the compressed state of the elastic seal member 22 when the door is closed in a non-submerged state in the lower frame side structure S3 forms a pressure gradient from high compression (dark color) in the suspension-side structure to low compression (light color) in the door-tip-side structure from the suspension side to the door-tip side.

[0086] Also, when considering the operability related to the opening and closing operation of the water stop door device 10 provided with such a water stop structure S in a non-submerged state, since the door 13 receives a strong repulsive force from the highly compressed elastic seal member 22 of the suspension-side structure S1, at first glance, the operability related to the opening and closing operation in normal times seems to deteriorate.

[0087] However, the repulsive force from the elastic seal member 22 on the suspension side hardly hinders the closing operation due to the action of the lever. Therefore, it does not make the user who performs the closing operation feel excessive weight.

[0088] Also, on the door tip side, the elastic seal member 22 of the door tip side structure S2 is in a compressed state with a normally easy-to-close and water-tight width d6 = 9.9 mm during flooding, that is, in a state of lightly contacting the door 13, and this also does not make the user who performs the door closing operation feel excessive weight.

[0089] Also, on the lower frame side, the elastic seal member 22 of the lower frame side structure S3 forms a pressure gradient in which the repulsive force becomes stronger from the door tip side to the hanging end side. However, since this lever action also strongly occurs from the door tip side to the hanging end side, it does not hinder the door closing operation and does not make the user who performs the door closing operation feel excessive weight.

[0090] Thus, it can be said that the water stop structure S according to the present embodiment is a water stop structure for realizing a water stop door device 10 suitable for normal use without requiring special force for closing the door.

[0091] Next, FIG. 9 shows the state of the door 13 during door closing with water pressure applied due to flooding. When water pressure due to flooding is applied to the door 13 as shown by the white arrow approximately in the center of the drawing, the door 13 rotates against the elastic force from the elastic seal member 22 of the door tip side elastic water stop member 11b by the rotation margin 24 shown in the upper left of FIG. 5, and is in a state of being obliquely accommodated with respect to the door frame 12 as shown in the lower drawing of FIG. 9 (a state where the door tip side is rotated further in the door closing direction than parallel).

[0092] In such a state, the hanging end side structure S1 is almost the same as when closing the door in a non-flooded state, and since the water tightness is exhibited, flooding to the protection area side is blocked.

[0093] In the door tip side structure S2, the elastic seal member 22, which had a normally easy-to-close and water-tight width d6 = 9.9 mm during flooding, is compressed by the water pressure via the door 13. For example, in the present embodiment, as shown in the upper left of FIG. 9, it is compressed until the door 13 abuts against the door contact surface 17d, and the elastic seal member 22 becomes 6.9 mm, which is more compressed than the width d3 = 9 mm when the water tightness described above can be exhibited, and the water tightness is exhibited to block flooding to the protection area side.

[0094] Then, as shown in FIG. 10, also in the lower frame side structure S3, the pressure gradient structure from the suspension side to the door tip side is a pressure gradient from a highly compressed state where watertightness is exhibited to a highly compressed state where watertightness is also exhibited, and watertightness is exhibited in the left-right direction as well, preventing water from entering the protection area side.

[0095] That is, it can be said that the water stop structure S according to the present embodiment is a water stop structure that can realize the water stop door device 10 without the need for prior installation work during use.

[0096] 〔Modification Example〕 Next, the water stop structure T according to the modification example will be described with reference to the drawings. FIG. 11 is an explanatory view showing a cross-section in a plan view of a water stop door device 40 to which the water stop structure T according to the modification example is applied.

[0097] The water stop door device 40 has substantially the same configuration as the water stop door device 10 described with reference to FIG. 5, but is different in that it mainly includes an auxiliary water stop member 70 that exhibits a water stop effect in the initial stage of water intrusion.

[0098] Specifically, the suspension side structure T1, the door tip side structure T2, and the lower frame side structure T3 of the water stop door device 40 exhibit the same actions and effects as the suspension side structure S1, the door tip side structure S2, and the lower frame side structure S3 described above when sufficient water pressure is applied to the door 13 during water intrusion, and can prevent water from entering.

[0099] However, when it is in a state of water intrusion but the water depth is not yet sufficient to apply sufficient water pressure, in the above-described water stop door device 10, the compression of the door tip side elastic water stop member 11b using the rotation allowance 24 is not sufficient, and the watertightness by the elastic seal member 22 is broken, and it is expected that water will enter the protection area side from the gap between the door 13 and the door frame 12.

[0100] In this regard, in the water stop structure T adopted in the water stop door device 40 according to this modification example, an auxiliary water stop member 70 is disposed at the position of the door contact surface 17d, so that when the door 13 is flooded with water at a water pressure insufficient for the water stop member 11, particularly the water tightness of the door tip side elastic water stop member 11b, which may be poor in water tightness during normal times, to exhibit its water tightness, it is possible to prevent water from entering through the gap of the door frame 12.

[0101] This auxiliary water stop member 70 is disposed in the accommodation recess 41 formed by recessing the portion of the above-mentioned door contact surface 17d toward the protection area side, and is disposed so as to protrude toward the water immersion area side from the accommodation recess edge wall body 42 that substantially functions as a door contact.

[0102] Further, the auxiliary water stop member 70 is a flexible long member accommodated in the accommodation recess 41 formed along the lower half peripheral edge of the door frame 12, and is composed of a base portion 71, a telescopic portion 72, and an adsorption portion 73 from the back side of the accommodation recess 41 to the door 13 side (from the protection area side to the water immersion area side) as shown in the upper enlarged view of FIG. 11.

[0103] The base portion 71 is the part disposed at the innermost part in the accommodation recess 41 and functions as a retaining base for preventing the auxiliary water stop member 70 from coming out of the accommodation recess 41.

[0104] The telescopic portion 72 is the part connecting the adsorption portion 73 to the base portion 71. The telescopic portion 72 is formed of a flexible material so as to be telescopable in the front-rear direction, and supports the adsorption portion 73 so as to be movable in the front-rear direction with respect to the base portion 71.

[0105] The adsorption portion 73 is a member for adsorbing to the surface on the protection area side of the door 13 to ensure water tightness. Particularly in this embodiment, a permanent magnet is disposed inside the adsorption portion 73 so that it can be adsorbed to the door 13 made of steel by magnetic force. Further, the magnetic force (adsorption force) is set to a level that can prevent water immersion at a water depth below the water depth at which the elastic seal member 22 of the door tip side elastic water stop member 11b can exhibit water tightness.

[0106] Also, although illustration is omitted, in the water stop door device 40 according to this modification example, a similar auxiliary water stop structure by the auxiliary water stop member 70 is also constructed in the lower frame side structure T3.

[0107] FIG. 12 is a conceptual diagram similar to FIG. 8 described above. However, it shows the compressed state of the elastic seal member 22 disposed on the water stop part 11 when the water depth is not yet deep enough to apply sufficient water pressure although it is during flooding, and the degree of watertightness at each part on the suspension end side, door tip side, and lower frame side of the auxiliary water stop member 70.

[0108] As can be seen from FIG. 12, the suspension end side elastic water stop member 11a, door tip side elastic water stop member 11b, and lower frame elastic water stop member 11c disposed on the inner side (near the center of the drawing) of the door frame 12 are in the same compressed state as the previous water stop structure S.

[0109] That is, the compressed state of the elastic seal member 22 in the suspension end side structure T1 is a high compression state shown in a dark color (black), the compression state in the door tip side structure T2 is a low compression state shown in a light color (white), and the compression state in the lower frame side structure T3 is in a state where a pressure gradient from high compression (dark color) to low compression (light color) is formed from the suspension end side to the door tip side.

[0110] Therefore, in the door tip side elastic water stop member 11b of the door tip side structure T2, sufficient watertightness may not be expected yet.

[0111] However, on the other hand, the auxiliary water stop member 70 maintains watertightness at a level where auxiliary water stop is possible uniformly from the suspension end side to the lower frame side and the door tip side. That is, as indicated by the symbol P in the legend of the degree of watertightness of the auxiliary water stop member shown below FIG. 12, the auxiliary water stop member 70 adsorbs with a force sufficient to prevent flooding by the water pressure at a water depth below the water depth at which the elastic seal member 22 can exhibit watertightness and exhibits watertightness.

[0112] Thus, according to the water stop door device 40 according to this modification example, when the door 13 is flooded with water pressure less than the water pressure at which the water tightness of the water stop component 11, particularly the door tip side elastic water stop member 11b, is exerted, an auxiliary water stop member 70 is provided to prevent water from entering through the gap of the door frame 12. Therefore, even at low water pressure, water ingress can be prevented as much as possible.

[0113] As described above, according to the water stop structure (for example, water stop structures S and T) according to this embodiment, it is a water stop structure that prevents water from entering through the gaps of the door frame at at least the left, right, and lower three peripheral edges of the closed swing door by means of elastic water stop members arranged along the same peripheral edge. When the door is closed in a non-flooded state where the door is not subjected to water pressure, the suspension side elastic water stop member arranged on the suspension side vertical frame of the door frame is compressed with a pressure that exhibits water tightness between the door and the door, a suspension side structure; when the door is closed in a non-flooded state, the door tip side elastic water stop member arranged on the door tip side vertical frame of the door frame is compressed with a pressure below the contact pressure that generates an elastic force that can be easily tightened by hand between the door and the door or does not contact the door, a door tip side structure; when the door is closed in a non-flooded state, the lower frame elastic water stop member arranged on the lower frame of the door frame contacts or does not contact the door with a pressure gradient from the compression pressure in the suspension side structure to the compression pressure or non-contact state in the door tip side structure from the suspension side to the door tip side, a lower frame side structure. Moreover, since rotation of the door is allowed to compress the door tip side elastic water stop member to a state where water tightness is exhibited by water pressure when the door is closed in a flooded state, there is no need to perform prior installation work during use, and a water stop door suitable for daily use can be realized without requiring special force for closing the door, and a water stop structure can be provided.

[0114] Finally, the description of each of the above-described embodiments is an example of the present invention, and the present invention is not limited to the above-described embodiments. Therefore, it goes without saying that various changes can be made according to the design and the like as long as they are within the scope not departing from the technical idea of the present invention even outside the above-described embodiments.

Explanation of Reference Numerals

[0115] 11a Suspension side elastic water stop member 11b Door tip side elastic water stop member 11c Lower frame elastic water stop member 12 Door frame 12a Suspension side vertical frame 12b Door tip side vertical frame 12c Lower frame 13 Door 13a Suspension side edge 13b Door tip side edge 13c Lower side edge 13e Suspension side corner 18a Protective side suspension inner peripheral surface 18b Protective side door tip inner peripheral surface 18c Protective side lower frame inner peripheral surface 22 Elastic seal member 23 Screw hole 24 Rotation allowance 40 Water stop door device 70 Auxiliary water stop member S,T Water stop structure S1,T1 Suspension side structure S2,T2 Door tip side structure S3,T3 Lower frame side structure d5 Corner non-contact · Normal water tightness display width d6 Normal easy closing · Water tightness display width during flooding

Claims

1. A water stop structure that prevents water from entering through the gaps in the door frame along at least the lower three sides of the closed swinging door by means of elastic water stop members arranged along the same perimeter, a structure on the hanging side, in which when the door is closed in a non-flooded state where the door is not subjected to water pressure, the elastic water stop member on the hanging side arranged on the vertical frame on the hanging side of the door frame is compressed by a pressure that exhibits watertightness between the door and the frame, a structure on the door tip side, in which when the door is closed in a non-flooded state, the elastic water stop member on the door tip side arranged on the vertical frame on the door tip side of the door frame is compressed between the door and the frame by a pressure below the contact pressure that generates an elastic force that can be easily tightened by hand or does not contact the door, a structure on the lower frame side, in which when the door is closed in a non-flooded state, the elastic water stop member on the lower frame arranged on the lower frame of the door frame contacts or does not contact the door from the hanging side to the door tip side with a pressure gradient from the compression pressure in the structure on the hanging side to the compression pressure or non-contact state in the structure on the door tip side, and is provided with, Moreover, a water stop structure characterized in that rotation of the door is allowed to compress the elastic water stop member on the door tip side to a state where watertightness is exhibited by water pressure when the door is closed in a flooded state.

2. The water stop structure according to claim 1, wherein each of the elastic water stop members is arranged on the door frame so as to contact inside a region facing the door stop of the door frame when the door is closed in a flooded state.

3. The water stop structure according to claim 2, wherein the elastic water stop member on the hanging side is arranged at a position on the door tip side facing surface of the vertical frame on the hanging side that does not contact the hanging side corner when the door is opened and closed.

4. The water stop structure according to claim 1, further comprising an auxiliary water stop member for preventing water from entering through the gap in the door frame when the door is flooded at a water pressure less than the water pressure at which the watertightness of the elastic water stop member on the door tip side is exhibited.

5. The water stop structure according to claim 1, further comprising contact pressure adjusting means for adjusting the contact pressure of each of the elastic water stop members against the door.

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