Water-stopping structure for abutting section and water-stopping structure for double doors

Abstract

To provide a water-stopping structure for an abutting section, which can ensure uniform water-tightness by mitigating partial stress concentration during door closure, and can prevent partial deterioration of an elastic seal body arranged in a water-stopping member.SOLUTION: A water-stopping structure for an abutting section during door closure is configured to include an arc-shaped curved water-stopping member arranged convexly on a protected area so as to be spanned from the lower end of a door leading edge of the first-closed door along the abutting section upward to the door leading edge of the later-closed door, and an arc-shaped fitting recess formed in a bottom frame of a door frame into which the vicinity of the lower end of the arc-shaped water-stopping member fits via an elastic seal when the first-closed door is closed.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a water stop structure for a summons part of a double-opening door and a water stop structure for a double-opening door.

Background Art

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

[0003] Among them, a retrofit type water stop 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 or door frame itself with a water stop door, so the cost and labor required for flood countermeasures for existing hinged 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, in the water stop structure using the above conventional retrofit water stop, a block-shaped summons convex part in a table shape in plan view is adopted for water stop between the summons part and the lower frame part of the door frame, resulting in problems such as partial stress concentration during door closing and difficulty in obtaining uniform watertightness, and partial deterioration is likely to occur in the elastic seal body arranged on the water stop member.

[0006] The present invention has been made in view of such circumstances, and provides a summons part water stop structure that can relieve partial stress concentration during door closing to ensure uniform watertightness and prevent partial deterioration of the elastic seal body arranged on the water stop member.

[0007] The present invention also provides a water stop structure for a double-leaf door having the above-mentioned call part water stop structure.

Means for Solving the Problems

[0008] In order to solve the above-mentioned conventional problems, in the call part water stop structure according to the present invention, (1) in the call part water stop structure of the double-leaf door in the closed state, an arc-shaped curved surface water stop member convexly disposed on the protection area side is provided so as to be spanned from the lower end on the door tip side of the first-closed door upward along the call part to the door tip side of the second-closed door, and an arc-shaped fitting recess formed in the lower frame of the door frame where the lower end portion of the arc-shaped curved surface water stop member is fitted via an elastic sealing body when the first-closed door is closed are provided.

[0009] Moreover, the call part water stop structure according to the present invention also has the following features. (2) The angle formed by the tangent line of the end portion on the first-closed door side of the arc portion in the cross-sectional view in the plane direction of the arc-shaped curved surface water stop member and the surface of the door on the protection area side when the first-closed door is closed, and the angle formed by the tangent line of the end portion on the second-closed door side of the arc portion and the surface of the door on the protection area side when the second-closed door is closed are each obtuse angles. (3) The opposing surface of the arc-shaped curved surface water stop member with the second-closed door is provided with an inclined surface where the gap gradually expands from the door tip side to the hanging end side of the second-closed door, and a trapezoidal elastic sealing body is disposed on the inclined surface in the cross-sectional view in the plane direction.

[0010] Moreover, in the water stop structure for a double-leaf door according to the present invention, (4) it is a water stop structure for the double-leaf door in the closed state, including the call part water stop structure according to claim 1 for preventing water intrusion from the call part of the first-closed door and the second-closed door, a hanging end water stop structure for preventing water intrusion from the gap of the door frame on the hanging end side of each of the first-closed door and the second-closed door, and a hem part water stop structure for preventing water intrusion from the gap of the door frame at the hem part of each of the first-closed door and the second-closed door.

Advantages of the Invention

[0011] According to the summons part water stop structure of the present invention, an arc-shaped curved surface water stop member convexly disposed on the protection region side so as to be spanned from the lower end of the door tip side of the front closing door upward along the summons part to the door tip side of the rear closing door, and when the front closing door is closed, an arc-shaped fitting recess formed in the lower frame of the door frame where the lower end portion vicinity of the arc-shaped curved surface water stop member is fitted via an elastic seal body are provided. Therefore, it is possible to provide a summons part water stop structure that can relieve partial stress concentration during closing and ensure uniform watertightness, and also prevent partial deterioration of the elastic seal body disposed on the water stop member.

[0012] Further, if the angle formed by the tangent line of the end portion on the front closing door side of the arc portion in the cross-section view in the plane direction of the arc-shaped curved surface water stop member and the door surface on the protection region side when the front closing door is closed, and the angle formed by the tangent line of the end portion on the rear closing door side of the arc portion and the door surface on the protection region side when the rear closing door is closed are each obtuse angles, firm watertightness at the end portion on the front closing door side and the end portion on the rear closing door side of the arc portion can be ensured.

[0013] Further, the opposing surface of the arc-shaped curved surface water stop member with the rear closing door is provided with an inclined surface whose gap gradually expands from the door tip side to the suspension end side of the rear closing door. If a trapezoidal elastic seal body is disposed on the inclined surface in the cross-section view in the plane direction, the contact of the elastic seal body with the rear closing door can be made on a substantially parallel plane, and it is easy to compress the elastic seal body and firm watertightness can be ensured.

[0014] Moreover, it is a water stop structure for double-opening doors when closed, including the summons part water stop structure according to claim 1 that prevents water ingress from the summons part between the front closing door and the rear closing door, a suspension end water stop structure that prevents water ingress from the gap of the door frame on the suspension end side of each of the front closing door and the rear closing door, and a hem part water stop structure that prevents water ingress from the gap of the door frame at the hem part of each of the front closing door and the rear closing door. In this way, it is possible to provide a water stop structure for double-opening doors that can relieve partial stress concentration during closing and ensure uniform watertightness, and also prevent partial deterioration of the elastic seal body disposed on the water stop member, while also having watertightness with the door frame on the suspension end side and the hem side of both doors.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mode for Carrying Out the Invention

[0016] The present invention relates to a summons part water stop structure for a double-leaf door in a closed state, which can relieve partial stress concentration when the door is closed to ensure uniform watertightness, and can also prevent partial deterioration of the elastic seal body arranged on the water stop member. A summons part water stop structure is provided.

[0017] The summons part water stop structure and other water stop structures according to this embodiment may be adopted as the structure of a newly created double-leaf door, but may also be adopted to impart a water stop function to an already installed double-leaf door, for example, a normal double-leaf door that does not have the function of preventing flooding. Particularly in the latter case, compared with the case of performing large-scale construction such as removing an existing double-leaf door and replacing it with a water stop door or processing an existing door frame, flood countermeasures can be taken inexpensively and quickly.

[0018] Also, each door constituting the double-leaf door may be a door of substantially the same size, or may be a door of relatively different sizes. That is, the double-leaf door includes so-called double-leaf doors and parent-child doors.

[0019] Also, the material of the door is not particularly limited as long as it can ensure watertightness. For example, a steel door is suitable.

[0020] Also, the double-leaf door is a double-leaf door in which the pressurizing direction of the water pressure of the water trying to enter during a rise in water level on the door and the closing direction of the door coincide. Hereinafter, such a double-leaf door is also referred to as a pressure-closing type double-leaf door.

[0021] Also, the summons part water stop structure includes, in addition to the water stop structure of the gap between the front closing door and the rear closing door, the water stop structure between the arc-shaped curved surface water stop member and the lower frame.

[0022] And, as a characteristic point of the summons part water stop structure according to this embodiment, an arc-shaped curved surface water stop member disposed convexly on the protection area side so as to be spanned from the lower end on the door tip side of the front closing door upward along the summons part to the door tip side of the rear closing door, and an arc-shaped fitting recess formed in the lower frame of the door frame where the lower end portion of the arc-shaped curved surface water stop member fits via an elastic sealing body when the front closing door is closed.

[0023] The conventional water stop structure having the summons convex part in the shape of a table in plan view and in a block shape described above has a problem that stress is likely to concentrate at the bent corner part. For example, when the double-leaf door is opened and closed daily, the elastic sealing body is likely to deteriorate from the stress concentration part. Also, when it deteriorates, it naturally becomes difficult to ensure uniform watertightness.

[0024] On the other hand, in the summons part water stop structure according to the present embodiment, as described above, an arc-shaped curved surface water stop member is adopted, and an arc-shaped fitting recess is formed in the lower frame of the door frame to form a water stop structure by fitting these, so that problems such as stress concentration and ensuring watertightness can be improved compared with the conventional ones.

[0025] Further, as an overall feature of the water stop door device described in the present embodiment, there is a point that it includes a predetermined hanging end side structure, a door tip side structure of the rear closing door, and a lower frame side structure.

[0026] 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 water stop member disposed on the hanging end side vertical frame of the door frame, for example, the child door hanging end side vertical frame or the parent door hanging end side vertical frame described later, is compressed by a pressure that exhibits watertightness between the door and the frame.

[0027] Here, the non-flooded state where the door is not receiving water pressure means a state where water has not reached the door, and more specifically, for example, it means a normal state.

[0028] Also, the state when the door is closed means a state where the door is housed in the door frame. For example, the front closing door may be in a state locked by a French drop, or the rear closing door may be in a state where the door is housed in the door frame in a state where a latch bolt or a dead bolt can be locked to a strike formed on the door tip side end surface of the front closing door.

[0029] Also, the compression by the pressure that exhibits watertightness in the following description means that, for example, when the height of the upper end position of the hanging end side water stop member or the summons part arc-shaped curved surface water stop member is lower than the height (height of the front and back penetrating part) where the handle or lock of the door is installed, it is the case when water presses on the door up to the height of the upper end position of these water stop members, and when the height of the upper end position of these water stop members is higher than the height of the front and back penetrating part, it means that the water stop member is compressed by a pressure such that there is no water intrusion from the gap of the door frame even when water presses on the door at least up to the height of the front and back penetrating part.

[0030] The structure on the door tip side of the rear closing door (for example, the upper sealing structure for summoning described later) is such that when the door is closed in a non-flooded state, the summoning part arc-shaped curved surface sealing member arranged at approximately the lower half of the door tip side edge of the front closing door is compressed with the door or does not contact the door at a pressure below the contact pressure that generates an elastic force that can be easily tightened by hand.

[0031] The contact pressure that generates an elastic force that can be easily tightened by hand does not refer to a contact pressure where the repulsive force from the summoning part arc-shaped curved surface sealing member is too strong when tightening the door and it is impossible to close the door without bracing, but rather 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.

[0032] To specifically show an example for 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 tightening or the door can be closed by the force of a door closer is assumed.

[0033] The summoning part arc-shaped curved surface sealing member compressed with the rear closing door at a pressure (easy closing pressure) below the contact pressure (easy closing limit pressure) that generates an elastic force that can be easily tightened by hand may or may not exhibit watertightness at the time of closing the rear closing door in a non-flooded state.

[0034] Also, at the time of closing the door in a non-flooded state, the summoning part arc-shaped curved surface sealing member may not be in contact and may not be receiving the compressive force from the door.

[0035] The lower frame side structure can be roughly divided into the rear closing door side lower frame structure constructed between the hem part of the rear closing door excluding the vicinity of the door tip and the rear closing door side straight part of the lower frame sealing member, the front closing door side lower frame structure constructed between the hem part of the front closing door excluding the vicinity of the door tip and the front closing door side straight part of the lower frame sealing member, and the lower summoning sealing structure constructed between the summoning part arc-shaped curved surface sealing member and the curved part of the lower frame sealing member, each having its own characteristics.

[0036] The structure of the lower frame on the trailing closing door side is such that when the door is closed in a non-flooded state, the straight portion on the trailing closing door side of the lower frame water stop member disposed on the lower frame of the door frame comes into contact or non-contact with the door in a pressure gradient from the hanging end side to the door tip side, from the compression pressure in the hanging end side structure to the compression pressure or non-contact state in the door tip side structure of the trailing closing door.

[0037] That is, the straight portion on the trailing closing door side of the lower frame water stop member in the structure of the lower frame on the trailing closing door side is not pressurized with a uniform pressure from the hanging end side to the door tip side when the door is closed in a non-flooded state, but is pressurized with a pressure that gradually changes from the pressure at which watertightness can be exhibited to the easy-closing pressure or the non-pressurized state.

[0038] The structure of the lower frame on the leading closing door side is such that when the door is closed in a non-flooded state, the straight portion on the leading closing door side of the lower frame water stop member is compressed with a pressure that exhibits watertightness between the leading closing door. In the water stop door device 10 described later according to this embodiment, a hem water stop structure is constructed by the structure of the lower frame on the trailing closing door side and the structure of the lower frame on the leading closing door side.

[0039] The structure of the lower part of the mating part is such that when the door is closed in a non-flooded state, the curved portion of the lower frame water stop member is compressed with a pressure that exhibits watertightness between the mating part arc-shaped curved surface water stop member. In the water stop door device 10 described later according to this embodiment, a mating part water stop structure is constructed by this structure of the lower part of the mating part and the above-mentioned structure on the door tip side of the trailing closing door (for example, the mating part upper water stop structure described later).

[0040] Another further feature is that rotation of the trailing closing door is allowed to compress the mating part arc-shaped curved surface water stop member to a state where watertightness is exhibited by water pressure when the door is closed in a state where the door is flooded.

[0041] That is, the rear closing door has a rotation allowance left such that it can be further pushed into the door frame side (in the closing door direction) against the elastic force of the engaging part arc curved surface water stop member. When the rear closing door is pushed in by water pressure using this rotation allowance, the elastic sealing body of the engaging part arc curved surface water stop member is compressed with a pressure that exhibits watertightness. Such a rotation allowance can utilize a clearance provided as play, for example, between the door and the door frame or between the door tips of the front closing door and the rear closing door 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 clearance, the rotation will be restricted, so removing this can secure the rotation allowance.

[0042] In this way, by providing the above-described predetermined hanging end side structure, the door tip side structure of the rear closing door, and the lower frame side structure, and further having a rotation allowance structure that allows at least further rotation of the rear closing door by the rotation allowance and exhibits watertightness when water pressure is applied, it is possible to provide a watertight structure that does not require prior installation work during use and does not require special force for closing the rear closing door, making it suitable for daily use.

[0043] Note that although not particularly limited, when closing the door in a non-flooded state, it is desirable that the front closing door and the rear closing door are in a state of being flush with the door frame. That is, usually, the door fits 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, preventing a visual sense of incongruity.

[0044] Also, to add, when the elastic sealing body of the engaging part arc curved surface water stop member is compressed to a state where watertightness is exhibited by water pressure, that is, when closing the door in a state where the door (especially the rear closing door) is flooded, it is desirable that the rear closing 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.

[0045] Hereinafter, regarding the water stop structure of the summons part, a parent-child door equipped with the water stop structures of other parts at the same time will be described as an example. For the sake of convenience of explanation here, first, the water stop structure at the peripheral edges of the left, right, and lower three sides of the door frame excluding the summons part will be mainly described, and then the water stop structure of the summons part will be described centering thereon.

[0046] Also, here, it is not a water stop structure that can prevent flooding during a water head that reaches the upper part of the door device, but a water stop structure for a double-leaf door that can be prepared for flooding up to about half the height of the door. Needless to say, this height can be changed as appropriate.

[0047] Also, in the following description, for example, as shown in FIG. 2, 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 flooding damage is desired to be suppressed is referred to as the protected area. That is, the opening door in which the water stop structure according to the present embodiment is adopted is arranged at the boundary between the flooded area and the protected area (hereinafter, also referred to as the water stop boundary).

[0048] Also, in the description of the door and each part, as shown in FIG. 2, the direction from the flooded area to the protected area is also referred to as the front-back direction, the width direction of the door or the like is referred to as the left-right direction, and the height direction of the door or the like as shown in FIG. 1 is also referred to as the up-down direction. Also, for the sake of convenience of explanation, the front-back direction may also be referred to as the direction of people entering and leaving or the opening and closing direction of the door (opening direction, closing direction).

[0049] FIGS. 1 and 2 are explanatory views showing the water stop door device 10. FIG. 1 is a front view of the water stop door device 10 as viewed from the protected area side, and FIG. 2 is an explanatory view showing the X-X cross section of FIG. 1.

[0050] The water stop door device 10 is a pressure-closed type door device to which the water stop structure S is applied by retrofitting the water stop member 11 to an existing steel fire door device of a parent-child door type having no water stop function.

[0051] The water stop door device 10 is composed of a door frame 12, a door 13, a door closer 16, and a water stop member 11, as shown in FIG. 1.

[0052] The door frame 12 is a frame for storing a door 13 that can be opened and closed, and is installed through a wall 14 as shown in Fig. 2. As shown in Fig. 1, it includes a vertical frame 12k on the hanging end side of the inner door and a vertical frame 12o on the hanging end side of the outer door that extend in the vertical direction, and a lower frame 12c and an upper frame 12d that extend in the horizontal direction.

[0053] The door 13 is a member for closing the inner opening of the door frame 12, and forms a double - leaf door composed of an outer door 13o which is a rear - closing door and an inner door 13k which is a front - closing door. In this embodiment, as shown in Fig. 2, the outer door 13o is swingably attached to the vertical frame 12o on the hanging end side on the left side of the drawing via a hinge 15, and the inner door 13k is swingably attached to the vertical frame 12k on the hanging end side on the left side of the drawing via a hinge 15.

[0054] In addition, a French window lock 25 is provided on the inner door 13k, which can be changed between a fixed state fixed to the door frame 12 and a non - fixed state where it can be opened and closed. Additionally, the water - stop door device 10 according to this embodiment is used exclusively for entering and exiting through the outer door 13o, and since the inner door 13k is not usually used, it is fixed by the French window lock 25 during normal times.

[0055] The door closer 16 is a device for slowly and automatically closing the outer door 13o by hydraulic pressure, and the outer door 13o is biased in the closing direction by the door closer 16.

[0056] The water - stop member 11 is a member for preventing water from entering through the gaps in the door frame 12 at the three - side perimeters of the left, right, and bottom when the outer door 13o and the inner door 13k are closed, and water from entering through the calling part 26. It is composed of a hanging - end - side water - stop member 11a arranged on the vertical frame 12o on the hanging end side of the outer door and the vertical frame 12k on the hanging end side of the inner door, an arc - surface water - stop member 11b for the calling part arranged at approximately the lower half of the door - tip side of the inner door 13k, and a lower - frame water - stop member 11c arranged on the lower frame 12c.

[0057] Additionally, the water - stop structure S is composed of a hanging - end - side structure S1, a calling - part water - stop structure S2, and a lower - frame - side structure S3, and each structure is as follows.

[0058] That is, in this embodiment, the suspension-side structure S1 is constructed by the parent-door suspension-side structure S1o and the child-door suspension-side structure S1k.

[0059] The parent-door suspension-side structure S1o is constructed by the vertical frame 12o on the suspension side of the parent door, the suspension-side edge 13oa of the parent door 13o, and the suspension-side water-stop member 11a.

[0060] Also, the child-door suspension-side structure S1k is constructed by the vertical frame 12k on the suspension side of the child door, the suspension-side edge 13ka of the child door 13k, and the suspension-side water-stop member 11a.

[0061] The mating part water-stop structure S2 is constructed by the upper mating water-stop structure S2u and the lower mating water-stop structure S2d in this embodiment.

[0062] The upper mating water-stop structure S2u is constructed by the mating part arc-surface water-stop member 11b disposed on the leading-edge side edge 13kb of the child door 13k and the leading-edge side edge 13ob of the parent door 13o.

[0063] Also, as shown in FIGS. 1 and 2, the lower mating water-stop structure S2d is constructed by the mating part arc-surface water-stop member 11b and the curved part 27w of the lower-frame water-stop member 11c.

[0064] Also, the lower-frame side structure S3 is constructed by the lower-frame water-stop member 11c disposed on the lower frame 12c, the lower side edge 13oc of the parent door 13o, and the lower side edge 13kc of the child door 13k.

[0065] More specifically, the lower-frame side structure S3 is composed of the parent-door side lower-frame structure S3o, the child-door side lower-frame structure S3k, and the aforementioned lower mating water-stop structure S2d.

[0066] The parent-door side lower-frame structure S3o is constructed between the main part 13ocm of the parent-door skirt part, which corresponds to the lower side edge 13oc of the parent door 13o corresponding to the skirt part of the closed door except near the leading edge, and the parent-door side straight part 27o corresponding to the straight part on the closed-door side of the lower-frame water-stop member 11c.

[0067] The sub-door side lower frame structure S3k is constructed between the main part 13kcm of the sub-door skirt part corresponding to the lower side edge 13kc of the sub-door 13k corresponding to the skirt part of the closing door excluding the vicinity of the door tip, and the sub-door side straight part 27k corresponding to the straight part on the closing door side of the lower frame water stop member 11c.

[0068] The summons lower part water stop structure S2d has the above-described configuration, is also a structure constituting the summons part water stop structure S2, and is also a structure constituting the lower frame side structure S3.

[0069] In addition, in FIG. 1, the reference numeral 13ocs is the end part 13ocs on the door tip side of the parent door skirt part, and the reference numeral 13kcs indicates the end part 13kcs on the door tip side of the sub-door skirt part.

[0070] FIG. 3 is an explanatory diagram showing the configurations of the suspension side structure S1, the summons part water stop structure S2, and the lower frame side structure S3. In FIG. 3, for the sake of convenience of explanation, the lengths in the left-right direction of the parent door 13o, the sub-door 13k, the lower frame 12c, etc. are shown with shortening. The same applies to FIGS. 5 and 6.

[0071] As shown in FIG. 3, the opening 17 formed inside the door frame 12 (near the center of the drawing) is made into the water immersion side opening part 17a having an opening width substantially the same as the total width of the left-right widths of the parent door 13o and the sub-door 13k for the substantially half part on the water immersion area side, while the protection side opening part 17b having an opening width shorter than this total width is made for the substantially half part on the protection area side.

[0072] Both the water immersion side opening part 17a and the protection side opening part 17b are parts that function as an aisle between the water immersion area and the protection area. In particular, the water immersion side opening part 17a also has a function as a door accommodation part where the parent door 13o and the sub-door 13k are accommodated when the door is closed.

[0073] Further, a step part 17c is formed at the boundary part between the water immersion side opening part 17a and the protection side opening part 17b due to the difference in the opening width and the opening height, and the surface facing the water immersion area side of the step part 17c is the door contact surface 17d.

[0074] The child door suspension side structure S1k shown on the right side of FIG. 3 is composed of the child door suspension side vertical frame 12k, the suspension side edge 13ka of the child door 13k, and the suspension side water stop member 11a as described above, and their cooperation enables the function to be exerted.

[0075] The suspension side water stop member 11a is disposed on the inner peripheral surface (also referred to as the protection side inner peripheral surface hereinafter) of the frame inner side surface of the door frame 12 (including the door contact surface 17d. Hereinafter, it is also referred to as the inner peripheral surface), which constitutes the protection side opening 17b, and is the surface of the portion of the child door suspension side vertical frame 12k (hereinafter referred to as the protection side child door suspension inner peripheral surface 18ka), and is fixed by screws 19.

[0076] Similarly, the parent door suspension side structure S1o shown on the left side of FIG. 2 is composed of the parent door suspension side vertical frame 12o of the door frame 12, the suspension side water stop member 11a disposed on the parent door suspension side vertical frame 12o among the water stop members 11, and the suspension side edge 13o of the parent door 13o, and their cooperation enables the function to be exerted. The suspension side water stop member 11a is disposed on the protection side inner peripheral surface of the door frame 12 and is the surface of the portion of the parent door suspension side vertical frame 12o (hereinafter referred to as the protection side parent door suspension inner peripheral surface 18oa), and is fixed by screws 19.

[0077] Here, the structure of the suspension side water stop member 11a will be described with reference to FIG. 4. As shown in FIG. 4(a), the suspension side 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 body 22 having a substantially rectangular cross section in a sectional view.

[0078] The construction of the suspension-side water-stop member 11a is as follows: First, the bottom surface 21a of the support member 21 is arranged along the longitudinal direction while facing the wide surface 20a on the inner side of the bend of the substrate member 20. 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 body arrangement margin 20c is formed along the edge. The predetermined width (the width of the seal body arrangement margin) d1 is smaller than the width d2 of the elastic seal body 22 (d1 < d2), and is also smaller than the maximum width d3 at which the elastic seal body 22 can exhibit watertightness due to compression from the door 13 (d1 < d3 < d2). In this embodiment, an elastic seal body 22 with a width d2 of 10 mm in the free state and a maximum width d3 of 9.5 mm at which watertightness can be exhibited is adopted, and the predetermined width (the width of the seal body arrangement margin) d1 is set to 5 mm.

[0079] Next, as shown in FIG. 4(b), by arranging the elastic seal body 22 in the seal body arrangement margin 20c, the suspension-side water-stop member 11a is constructed.

[0080] The attachment of the suspension-side water-stop member 11a to the inner peripheral surface 18ka of the suspension part of the protected-side sub-door is performed by inserting a screw 19 into a screw hole 23 formed in the suspension-side water-stop member 11a, as shown in the lower right of FIG. 5.

[0081] Also, as shown in the upper right of FIG. 5, 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. 5 for the suspension-side water-stop member 11a, it is possible to easily adjust the front-rear mounting position of the suspension-side water-stop member 11a with respect to the inner peripheral surface 18ka of the suspension part of the protected-side sub-door. Hereinafter, this configuration is referred to as the front-rear position adjustment mechanism.

[0082] Also, the configuration and attachment of the suspension-side water-stop member 11a on the inner peripheral surface 18oa of the suspension part of the protected-side main door are the same as those of the inner peripheral surface 18ka of the suspension part of the protected-side sub-door described above, and the front-rear mounting position of the suspension-side water-stop member 11a can be easily adjusted by the front-rear position adjustment mechanism.

[0083] FIG. 6 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 figure of FIG. 6, when the door is closed in a non-flooded state, the parent door 13o and the child door 13k are parallel to the door frame 12 with a certain gap d4 between them from the hanging side of the parent door 13o to the hanging side of the child door 13k.

[0084] Also, on the hanging side of the child door 13k, as shown in the upper right figure of FIG. 6, the hanging side water stop member 11a disposed on the vertical frame 12k of the hanging side of the child door of the door frame 12 is compressed by the pressure that exhibits watertightness between it and the hanging side edge 13ka of the child door 13k, and the hanging side structure S1k of the child door is constructed.

[0085] It should be noted that the hanging side structure S1k of the child door when the door is closed in a non-flooded state is established by the balance between the force in the opening direction generated by the elastic seal body 22 of the hanging side water stop member 11a and the resistance force due to the engagement with the door frame 12 of the French drop 25 at the position where the child door 13k is parallel to the door frame 12.

[0086] Furthermore, the hanging side water stop member 11a is adjusted in its mounting position, that is, the protruding position with respect to the child door 13k, using the front-back position adjustment mechanism so that the width d5 of the elastic seal body 22 is the width at which sufficient watertightness is exhibited. In this embodiment, the width d5 at which sufficient watertightness of the hanging side structure S1k of the child door is exhibited is 9 mm compressed by 1 mm from the width d2 = 10 mm of the elastic seal body 22 in the free state when the door is closed. This is a state where it is further compressed compared to the width d3 = 9.5 mm when the above-mentioned watertightness can be exhibited.

[0087] Also, in the hanging side structure S1k of the child door, the hanging side water stop member 11a is disposed on the inner peripheral surface 18ka of the protected side hanging side of the child door of the door frame 12 so as to contact inside the facing area with the contact surface 17d of the child door 13k when the door is closed, realizing a more reliable water stop compared to the case where the elastic seal body 22 is arranged on the contact surface 17d to stop water.

[0088] Also, in the structure S1k on the hinge side of the sub-door, as shown in FIG. 7, the position where the water stop member 11a on the hinge side is disposed is a position (non-contact position) on the inner peripheral surface (door tip side facing surface) of the vertical frame 12k on the hinge side of the sub-door that does not come into contact with the hinge side corner 13e when the sub-door 13k is opened and closed, or a position (light contact position) where even if it comes into contact, the elastic seal member 22 only lightly touches without being greatly twisted.

[0089] For example, when referring more specifically to the case of the non-contact position, the elastic seal body 22 does not come into contact with the rotation locus (shown by the broken line) of the hinge side corner 13e when the sub-door 13k is opened and closed, and moreover, the position of the water stop member 11a on the hinge side 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 = 9 mm where sufficient water tightness is exhibited when the door is closed.

[0090] According to such a configuration, it is possible to prevent the elastic seal body 22 from being twisted and deteriorated due to contact with the hinge side corner 13e accompanying the rotation of the sub-door 13k. Further, the elastic seal body 22 is compressed toward the protection region side substantially perpendicular to the contact surface of the elastic seal body 22 by the hinge side edge 13ka that is substantially parallel in the left-right direction, so that water leakage can be firmly prevented by uniform compression.

[0091] In this way, by making the front-rear position adjustment mechanism function as a contact pressure adjustment means for adjusting the contact pressure of the water stop member 11a on the hinge side with respect to the sub-door 13k, the structure S1k on the hinge side of the sub-door is constructed.

[0092] Also, each configuration, attachment adjustment, etc. in the above-described structure S1k on the hinge side of the sub-door, for example, the adjustment of the position of the water stop member 11a on the hinge side by the front-rear position adjustment mechanism to obtain the corner non-contact · normal water tightness exhibition width (d5 = 9 mm) is substantially the same in the structure S1o on the hinge side of the main door except that it is not fixed by the French drop 25.

[0093] That is, on the hanging side of the main door 13o, as shown in the upper left figure of Fig. 6, the hanging-side water-stop member 11a disposed on the vertical frame 12o on the hanging side of the door frame 12 of the main door is compressed by the pressure that exhibits watertightness between it and the hanging-side edge 13oa of the sub-door 13k, and the hanging-side structure S1o of the main door is constructed.

[0094] Also, due to the pressure received from the main door 13o when the door is closed in a non-flooded state (for example, the biasing force from the door closer 16), the mounting position of the hanging-side water-stop member 11a using the front-rear position adjustment mechanism is adjusted so that the width of the elastic seal body 22 becomes the width d5 at which watertightness is sufficiently exhibited, that is, the protruding position with respect to the main door 13o is adjusted. Note that, similar to the hanging-side structure S1k of the sub-door, the width d5 at which sufficient watertightness is exhibited in the hanging-side structure S1o of the main door is set to 9 mm compressed by 1 mm from the width d2 = 10 mm of the elastic seal body 22 in the free state when the door is closed.

[0095] Also, in the hanging-side structure S1o of the main door, the hanging-side water-stop member 11a is disposed on the inner peripheral surface 18oa of the protective-side hanging side of the door frame 12 so as to abut inside the opposing region with the door contact surface 17d of the main door 13o when the door is closed, or the arrangement position of the hanging-side water-stop member 11a is adjusted by the front-rear position adjustment mechanism so that the elastic seal body 22 has a non-contact corner and a normal watertight exhibition width, and the hanging-side edge 13oa compresses the elastic seal body 22 substantially perpendicularly to the contact surface toward the protective region side. The same configuration as the hanging-side structure S1k of the sub-door is realized.

[0096] In this way, by making the front-rear position adjustment mechanism function as a contact pressure adjustment means for adjusting the contact pressure of the hanging-side water-stop member 11a with respect to the main door 13o, the hanging-side structure S1o of the main door is constructed.

[0097] Also, on the leading side of the main door 13o, as shown in the lower figure of Fig. 1 and Fig. 6, the mating part arc-shaped surface water-stop member 11b disposed near the lower half of the leading-side edge 13kb of the sub-door 13k is bridged upward along the mating part 26 from the lower end of the leading side of the sub-door 13k to the leading side of the main door 13o. The mating upper water-stop structure S2u is constructed by being compressed by the self-closing pressure between it and the leading-side edge 13ob of the main door 13o.

[0098] Here, the structure of the arc-shaped curved surface water stop member 11b of the mating part will be described with reference to FIG. 8. As shown in FIG. 8(a), the arc-shaped curved surface water stop member 11b of the mating part is composed of an arc-shaped outer plate 50 that is long and has a substantially arc-shaped cross-section in a sectional view, an inner plate 51 that is also long and arranged in a portion of the chord having a substantially arc-shaped cross-section in a sectional view, and an elastic seal body 52 that is long and has a trapezoidal cross-section in a sectional view.

[0099] The arc-shaped outer plate 50 is a member that forms an arc-shaped curved surface portion 50a characteristic of the appearance of the arc-shaped curved surface water stop member 11b of the mating part. In the lower mating part water stop structure S2d, the arc-shaped curved surface water stop member 11b is arranged on the edge 13kb of the leading end side of the sub-door 13k so that this arc-shaped curved surface portion protrudes toward the protection region side to be fitted to the curved portion 27w of the lower frame water stop member 11c via the elastic seal body 22.

[0100] Also, as shown in FIG. 8(b), the arc-shaped curved surface portion 50a is not a semi-circular arc portion of the circumference of a circle Q1 centered on the center P1. That is, the arc-shaped curved surface portion 50a is an arc portion included on the protection region side of the circumference of the circle Q1 with the center P1 closer to the immersion region than the surface of the protection region of each door, and has a shape along a portion corresponding to the central angle α.

[0101] As a result, the angle βk formed by the tangent line M1 at the end on the sub-door 13k side of the arc portion in the sectional view in the plane direction of the arc-shaped curved surface portion 50a and the surface of the protection region side door of the sub-door 13k when the door is closed, and the angle βo formed by the tangent line M2 at the end on the main door 13o side and the surface of the protection region side door of the main door 13o when the door is closed are each obtuse angles, for example, obtuse angles of 100 degrees or more.

[0102] According to such a configuration, it is possible to ensure reliable watertightness at the ends on the sub-door 13k side and the main door 13o side of the arc portion in the sectional view in the plane direction of the arc-shaped curved surface portion 50a.

[0103] Also, as shown in FIG. 8(a), the arc-shaped outer plate 50 is provided with ribs 50b for attachment to the edge 13kb of the leading end side of the sub-door 13k by screws 19 along the long side on the sub-door (front closing door) side of the arc-shaped curved surface portion 50a.

[0104] The inner plate 51 is a support plate arranged at a portion corresponding to a chord with respect to the arc shape of the arc-shaped outer plate 50, and includes an inner plate main body portion 51a that abuts against the surface of the sub-door 13k, which is the smoke return portion 13kd in this embodiment, and is fixed by screws 19, and an inclined surface portion 51b that is bridged over the leading edge side edge 13ob of the parent door 13o and is arranged opposite thereto. An elastic sealing body 52 is arranged on the inclined surface portion 51b.

[0105] Here, as shown in FIG. 8(b), the inclined surface portion 51b has an inclined surface shape in which the gap gradually expands from the leading edge side to the hanging edge side of the parent door 13o. On the other hand, when the elastic sealing body 52 is arranged along the inclined surface portion 51b, the elastic sealing body has a trapezoidal shape in a horizontal cross-sectional view such that the surface facing the parent door 13o comes into contact substantially parallel when the door is closed.

[0106] Also, the angle γ formed by the virtual plane n1 including the contact surface 52a of the elastic sealing body 52 with the lower frame water stop member 11c and the virtual plane n2 parallel to the surface on the protection region side of the sub-door 13k when the door is closed in a non-flooded state is made smaller than the angle βo (angle γ < angle βo).

[0107] According to such a configuration, compared with the case where the angle γ ≥ angle βo, the build-up that bulges outward in the radial direction of the circle Q1 due to the compression of the elastic sealing body 52 by the parent door 13o can be firmly adhered to the elastic sealing body 22 of the lower frame water stop member 11c, and reliable watertightness in the summons lower water stop structure S2d can be ensured.

[0108] And according to such a configuration, the contact between the elastic sealing body 52 and the parent door 13o can be made on a substantially parallel plane, the elastic sealing body 52 can be easily compressed, and reliable watertightness can be ensured.

[0109] In this embodiment, a trapezoidal elastic sealing body 52 is used in a horizontal cross-sectional view. However, it is also possible to use a rectangular elastic sealing body 52. The rectangular elastic sealing material is widely commercially available and easy to obtain. Also, the inclined surface portion 51b allows the contact between the elastic sealing body 52 and the parent door 13o to be made from the rectangular corner portion, making it easy to compress the elastic sealing body 52 and ensuring firm watertightness.

[0110] In the lower summons water stop structure S2d, the parent door 13o has a contact degree with the elastic sealing body 52 of the summons arc-shaped curved surface water stop member 11b such that it merely touches, or is in a state where it is in contact but hardly compresses the elastic sealing body 52, or is in a state where it is compressed by about 0.1 mm to 0.2 mm.

[0111] Incidentally, due to the pressure received from the parent door 13o when the door is closed in a non-flooded state (for example, the biasing force from the door closer 16), the elastic sealing body 52 generates a repulsive force smaller than the repulsive force that can be easily latched by hand or by the biasing force of the door closer, and, when rotating within the range of the rotation allowance described later during flooding, a sufficient watertightness can be exhibited (easily closable in normal times and watertightness exhibited during flooding state). Thus, the attachment position of the summons arc-shaped curved surface water stop member 11b is adjusted, that is, the protruding position of the elastic sealing body 52 with respect to the door 13 is adjusted.

[0112] Also, as shown in the upper central figure of FIG. 6, the gap d7 of the upper summons water stop structure S2u 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 upper summons water stop structure S2u, the parent door 13o is in a state where watertightness is exhibited by water pressure, that is, the rotation of the parent door 13o for compressing the elastic sealing body 52 of the summons arc-shaped curved surface water stop member 11b above the compression threshold for exhibiting watertightness is allowed. In this embodiment, the gap d7, which is the rotation allowance 24, is set to 1.5 mm.

[0113] Next, the lower frame side structure S3 will be described with reference to FIGS. 9 and 10. FIG. 9(a) is an explanatory view of the lower frame structure S3o on the parent door side with a partial omission of the Y1-Y1 cross section in FIG. 1(b), and FIG. 9(b) is an exploded explanatory view showing the vicinity of the lower frame 12c in FIG. 9(a) with the parent door 13o omitted. FIG. 10 is an explanatory view of the lower summons water stop structure S2d with a partial omission of the Y2-Y2 cross section in FIG. 1(b).

[0114] As described above, the lower frame side structure S3 is constructed by the lower frame structure S3o on the parent door side as the rear closing door side lower frame structure, the lower frame structure S3k on the child door side as the front closing door side lower frame structure, and the lower summons water stop structure S2d that also belongs to the summons part water stop structure S2.

[0115] As shown in FIG. 9(a), the lower frame structure S3o on the parent door side is composed of the lower frame 12c of the door frame 12, the lower frame water stop member 11c disposed on the lower frame 12c, and the main part 13ocm of the parent door skirt part of the parent door 13o, and functions are exerted by their cooperation.

[0116] As shown in FIG. 9(b), the lower frame water stop member 11c is composed of a substrate member 30 that is long and bent into a substantially L-shaped cross section, a support member 31 that is also long and has a substantially U-shaped cross section, and an elastic seal body 22 that is also long and has a substantially rectangular cross section.

[0117] The construction of the lower frame water stop member 11c is carried out by combining the substrate member 30, the support member 31, and the elastic seal body 22 along the longitudinal direction in substantially the same manner as the construction of the above-described suspension side water stop member 11a.

[0118] The lower frame water stop member 11c combined in this way is disposed on the inner peripheral surface of the protection side of the door frame 12, which is the surface of the part of the lower frame 12c (hereinafter referred to as the protection side lower frame inner peripheral surface 18c), and is fixed by screws 19 as shown in FIGS. 9(a) and 9(b).

[0119] Further, on the bottom surface 31a of the support member 31, a long hole-shaped screw hole 31b is formed at a position facing the screw hole 30a provided in the substrate member 30. Thus, it is possible to easily adjust the front-back mounting position of the elastic seal body 22 with respect to the support member 31 and the lower frame 12c fastened by the screw 19 for each support member 31. That is, the front-back position adjustment mechanism is also provided in the lower frame side structure S3, and it is configured to function as a contact pressure adjustment means as well.

[0120] Further, as a feature of the lower frame structure S3o on the parent door side, the elastic seal body 22 is configured to contact the door with a pressure gradient from the compression pressure on the suspension side structure to the compression pressure on the door tip side from the suspension side to the door tip side. In the following description, such a structure is also referred to as a pressure gradient structure.

[0121] The lower frame structure S3k on the child door side has a structure substantially the same as that of the lower frame structure S3o on the parent door side, but does not have a pressure gradient structure. The straight portion 27k on the child door side of the lower frame water stop member 11c disposed on the lower frame 12c is compressed with a pressure that exhibits watertightness between the main part 13kcm of the hem portion of the child door 13k.

[0122] Further, the straight portion 27k on the child door side of the lower frame water stop member 11c is adjusted in the mounting position, that is, the protruding position with respect to the child door 13k, using the front-back position adjustment mechanism so that the width of the elastic seal body 22 becomes the width d5 at which watertightness is sufficiently exhibited.

[0123] Further, the lower frame water stop member 11c is disposed on the inner peripheral surface 18c of the protective side lower frame of the door frame 12 so as to contact inside the facing region with the door contact surface 17d of each door when the door is closed, realizing a more reliable water stop compared to the case where the elastic seal body 22 is disposed on the door contact surface 17d for water stop.

[0124] In this way, the front-back position adjustment mechanism is made to function as a contact pressure adjustment means for adjusting the contact pressure of the straight portion 27k on the child door side with respect to the child door 13k, thereby constructing the lower frame structure S3k on the child door side.

[0125] The lower closing water-stop structure S2d also has a structure similar to that of the lower frame structure S3o on the main door side, but is different in that it does not have a pressure gradient structure like the lower frame structure S3k on the sub-door side.

[0126] Also, the lower frame water-stop member 11c constituting the lower closing water-stop structure S2d, that is, the curved portion 27w, is different in configuration in that it is formed as an arc-shaped fitting recess as shown in FIGS. 6 and 10.

[0127] Specifically described, as shown in FIG. 10, in the lower closing water-stop structure S2d, the elastic seal body 22 in the curved portion 27w of the lower frame water-stop member 11c disposed on the lower frame 12c is compressed by a pressure that exhibits watertightness between the arc-shaped curved surface portion 50a of the closing portion arc-shaped curved surface water-stop member 11b disposed on the sub-door 13k.

[0128] Also, in the lower closing water-stop structure S2d, similar to the lower frame structure S3k on the sub-door side, the curved portion 27w of the lower frame water-stop member 11c is adjusted in its mounting position, that is, the protruding position with respect to the arc-shaped curved surface portion 50a of the closing portion arc-shaped curved surface water-stop member 11b, by using the front-back position adjustment mechanism so that the width d5 of the elastic seal body 22 is a width at which watertightness is sufficiently exhibited.

[0129] In this way, by making the front-back position adjustment mechanism function as a contact pressure adjustment means for adjusting the contact pressure with respect to the arc-shaped curved surface portion 50a of the curved portion 27w, the lower closing water-stop structure S2d is constructed.

[0130] Also, as a feature of the lower frame side structure S3 described above, the elastic seal body 22 of the lower frame water-stop member 11c is configured to contact the door with a pressure gradient from the suspension side to the door tip side at the straight portion 27o on the main door side, from the compression pressure in the suspension side structure to the compression pressure in the door tip side structure, and is configured to be compressed by a pressure that exhibits watertightness at the straight portion 27k and the curved portion 27w on the sub-door side.

[0131] FIG. 11 is an explanatory view conceptually showing the compressed states of the elastic seal bodies 22 and 52 respectively disposed on the suspension-side water stop member 11a, the mating portion arc surface water stop member 11b, and the lower frame water stop member 11c when the door is closed in a non-submerged state. In FIG. 11, the degree of compression of the elastic seal bodies 22 and 52 in each water stop member is shown in shades, and the darker the color (black), the greater the pressure received from the door 13 and the mating portion arc surface water stop member 11b and the higher the degree of compression; conversely, the lighter the color (white), the smaller the pressure received and the lower the degree of compression.

[0132] The compressed state of the elastic seal body 22 when the door is closed in a non-submerged state in the child door suspension-side structure S1k is a state compressed with the corner non-contact and normal watertight performance width d5 = 9 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. 10, it is in a highly compressed state shown in a dark color (black).

[0133] Also, the compressed state of the elastic seal body 22 when the door is closed in a non-submerged state in the parent door suspension-side structure S1o is also a state compressed with the corner non-contact and normal watertight performance width d5 = 9 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, it is in a highly compressed state shown in a dark color (black).

[0134] Also, the compressed state of the elastic seal body 22 when the door is closed in a non-submerged state in the upper mating portion water stop structure S2u of the mating portion water stop structure S2 is a state where normal easy closing and watertight performance during immersion are exhibited as described above. This is a situation where the parent door 13o lightly contacts the elastic seal body 22, and it is in a low-compression state shown in a light color (white).

[0135] Also, the compressed state of the elastic seal body 22 when the door is closed in a non-submerged state in the child door side lower frame structure S3k of the lower frame side structure S3 is a state compressed with the normal watertight performance width d5 = 9 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, it is in a highly compressed state shown in a dark color (black).

[0136] In addition, when the door is closed in a non-waterlogged state in the parent door side lower frame structure S3o of the lower frame side structure S3, a pressure gradient is formed from the hanging side to the door end side, ranging from high compression (dark color) in the hanging side structure to low compression (light color) in the door end side structure.

[0137] Here, in order to explain the compression state at the intersection of the joining portion circular curved surface water stopper member 11b and the lower frame water stopper member 11c (reference symbol P2 portion indicated by an x ​​mark in the figure), another diagram is shown in the circled frame in Fig. 10. Reference symbol P2 portion is a state in which the elastic seal body 52 of the joining portion circular curved surface water stopper member 11b overlaps with the back side of the paper in Fig. 10, and the elastic seal body 22 of the lower frame water stopper member 11c overlaps with the front side of the paper, and the diagram in the circle shows the state at the overlapping portion by shifting the compression state by the elastic seal body 52 of the joining portion circular curved surface water stopper member 11b on the back side of the paper a little upward. The x mark in the diagram in the circle shows the part that is originally overlapped in the front-to-back direction of the paper, and does not show the pressure state.

[0138] As shown in the figure within the circular frame, in the lower joint watertight structure S2d, the elastic seal body 52 of the arc-curved watertight member 11b of the joint is in a normal easy-to-close / watertight state when flooded, similar to the compressed state in the upper joint watertight structure S2u, where the door 13 is lightly abutting against the elastic seal body 22, and is in a low compression state shown in a light color (white).

[0139] On the other hand, the elastic seal body 22 of the lower frame water-stopping member 11c is in a compressed state by the arc curved portion 50a at a corner non-contact / normal watertight width d5 ​​= 9 mm, similar to the compressed state in the child door side lower frame structure S3k, and since this is a width at which watertightness is sufficiently exhibited even when the door is closed in a non-waterlogged state, it is in a highly compressed state as shown in a dark color (black).

[0140] Then, considering the operability related to the opening and closing operation of the water stop door device 10 equipped with such a water stop structure S in a non-flooded state, particularly regarding the operability of the main door 13o, which is assumed to be used frequently, rather than the sub-door 13k that is usually fixed by the French drop 25. At first glance, since the main door 13o receives a strong repulsive force from the elastic seal body 22 in the high-compression state of the main door suspension side structure S1o, the operability related to the normal opening and closing operation seems to deteriorate.

[0141] However, the repulsive force from the elastic seal body 22 on the suspension side hardly hinders the closing operation due to the lever action. Therefore, it does not make the user performing the closing operation feel excessive weight.

[0142] Also, on the door tip side of the main door 13o, the elastic seal body 52 of the summons part arc curved surface water stop member 11b is in a state where it is easy to close and watertight during flooding, that is, a state where it lightly contacts the main door 13o. This also does not make the user performing the closing operation feel excessive weight.

[0143] Moreover, on the lower frame 12c side, the elastic seal body 22 of the lower frame side structure S3 forms a pressure gradient where the repulsive force becomes stronger from the door tip side to the suspension side at the main door side straight part 27o. However, since this lever action also strongly occurs from the door tip side to the suspension side, it does not hinder the closing operation and does not make the user performing the closing operation feel excessive weight.

[0144] Thus, it can be said that the water stop structure S according to this embodiment is a water stop structure for realizing a water stop door device 10 that does not require special force for closing and is suitable for normal use.

[0145] Next, the state of the door 13 during closing with water pressure applied due to flooding is shown in Fig. 12. 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 main door 13o rotates against the elastic force from the elastic seal body 52 of the summons part arc curved surface water stop member 11b due to the rotation margin 24 shown in the upper figure of Fig. 6. As shown by the symbol P3 in the upper figure of Fig. 12 within the round frame, the gap disappears and it becomes a state where it is housed obliquely with respect to the door frame 12 (a state where the door tip side rotates further in the closing direction than parallel).

[0146] In such a state, the structure S1o on the hanging side of the parent door is almost the same as when the door is closed in a non-flooded state, and since the watertightness is being exhibited, flooding into the protected area side is prevented.

[0147] In the upper sealing structure S2u for summoning, the elastic sealing body 52, which was in a state of being easily closable during normal times and exhibiting watertightness during flooding, is compressed by the water pressure via the parent door 13o. For example, in this embodiment, as shown within the upper circular frame in FIG. 12, the elastic sealing body 52 is compressed until the parent door 13o abuts against the smoke-return portion 13kd of the child door 13k, and the elastic sealing body 52 is in a state of being further compressed compared to the width d3 = 9 mm when the watertightness described above can be exhibited. As a result, watertightness is exhibited and flooding into the protected area side is prevented. For example, in this embodiment, due to the rotation allowance 24 (d7 = 1.5 mm), the elastic sealing body 52 is compressed by 1.5 mm from the parent door 13o and watertightness is exhibited.

[0148] Also at this time, in the lower sealing structure S2d for summoning, as shown within the upper circular frame, the elastic sealing body 22 of the lower frame sealing member 11c is compressed by the bulging of the elastic sealing body 52, and watertightness is exhibited between the elastic sealing body 22 and the elastic sealing body 52.

[0149] In addition, as described above, the contact portion between the elastic sealing body 22 and the arcuate curved surface portion 50a is in a state of being compressed with a corner non-contact and normal-time watertightness exhibition width d5 = 9 mm, and watertightness is naturally exhibited even when water pressure is applied.

[0150] And, as shown in FIG. 13, also in the parent-door side lower frame structure S3o of the lower frame side structure S3, since the lower sealing structure S2d for summoning has changed to a highly compressed state, the pressure gradient structure from the hanging side to the door tip side of the parent door 13o is a pressure gradient from a highly compressed state where watertightness is exhibited to another highly compressed state where watertightness is also exhibited. Thus, watertightness is exhibited in the left-right direction of the door 13 and flooding into the protected area side is prevented. Note that the inside of the circular frame in FIG. 13 is a diagram showing the overlapping portion P4 disassembled, similar to FIG. 11.

[0151] That is to say, 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.

[0152] Further, in the water stop structure S of the double-leaf door in the closed state, a mating part water stop structure (for example, mating part water stop structure S2) that prevents water from entering from the mating part (for example, mating part 26) of the first closing door (for example, child door 13k) and the second closing door (for example, parent door 13o), and a suspension point water stop structure (for example, suspension point side structure S1) that prevents water from entering from the gap of the door frame (for example, child door suspension point side vertical frame 12k, parent door suspension point side vertical frame 12o) on the suspension point side of each of the first closing door and the second closing door, and a bottom part water stop structure (for example, child door side lower frame structure S3k, parent door side lower frame structure S3o) that prevents water from entering from the gap of the door frame at the bottom part of each of the first closing door and the second closing door. By providing these, partial stress concentration during closing can be alleviated to ensure uniform watertightness, and at the same time, a mating part water stop structure that can prevent partial deterioration of the elastic seal body (for example, elastic seal bodies 22, 52) arranged on the water stop member (for example, water stop member 11) can be provided, and a water stop structure for a double-leaf door with watertightness with the door frame on the suspension point side and the bottom side of both doors can be provided.

[0153] Further, if the angle (for example, angle βk) formed by the tangent line (for example, tangent line M1) of the end on the first closing door side of the arc part in the cross-section view in the plane direction of the arc-shaped curved surface water stop member (for example, mating part arc-shaped curved surface water stop member 11b) and the door surface on the protection area side when the first closing door is closed, and the angle (for example, angle βo) formed by the tangent line (for example, tangent line M2) of the end on the second closing door side of the arc part and the door surface on the protection area side when the second closing door is closed are both obtuse angles, firm watertightness of the end on the first closing door side and the end on the second closing door side of the arc part can be ensured.

[0154] Further, the surface of the arc-shaped curved surface water stop member facing the second closing door (for example, inner plate 51) is provided with an inclined surface (for example, inclined surface part 51b) whose gap gradually expands from the door tip side to the suspension point side of the second closing door. If a trapezoidal elastic seal body (for example, elastic seal body 52) is arranged on the inclined surface in the cross-section view in the plane direction, the contact between the elastic seal body and the second closing door can be made on a substantially parallel plane, and the elastic seal body can be easily compressed to ensure firm watertightness.

[0155] This application also includes the following inventions. (C1) A water-stop structure that prevents water from entering through the gaps in the door frame and the engagement part at at least the lower left and right three edges of the closed double-leaf door, by means of a water-stop member arranged along the same edges and the engagement part. When the door is closed in a non-flooded state where the door is not subjected to water pressure, the suspension-side water-stop member arranged on the vertical frame on the suspension side of the door frame is compressed with a pressure that exhibits watertightness between the door and the suspension-side structure. When the door is closed in a non-flooded state, the engagement part arc-surface water-stop member arranged at the door tip of the first-closed door that constitutes the engagement part 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 second-closed door or does not contact the second-closed door, which is the engagement part water-stop structure. When the door is closed in a non-flooded state, the lower-frame water-stop member arranged on the lower frame of the door frame contacts or does not contact the second-closed door from the suspension side to the door tip side with a pressure gradient from the compression pressure in the suspension-side structure to the compression pressure or non-contact state in the engagement part water-stop structure, which is the lower-frame side structure. Moreover, if the rotation of the second-closed door is allowed to compress the engagement part arc-surface 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.

[0156] (C2) Also, each of the water-stop members is arranged on the door frame so as to contact inside the area facing the door stop of the door frame of the door when the door is closed in a flooded state, so that water ingress can be more firmly prevented.

[0157] (C3) Also, the suspension-side 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, so that deterioration of the suspension-side water-stop member due to contact with the corner of the door can be prevented.

[0158] (C4) Also, since contact pressure adjustment means for adjusting the contact pressure of each water-stop member against the door is provided, the contact pressure between each water-stop member and the door can be easily adjusted.

[0159] As described above, according to the summons part water stop structure according to the present embodiment, an arcuate curved surface water stop member disposed convexly on the protection region side so as to be spanned from the lower end on the door tip side of the front closing door upward along the summons part to the door tip side of the rear closing door, and an arcuate fitting recess formed in the lower frame of the door frame where the vicinity of the lower end of the arcuate curved surface water stop member fits via an elastic seal body when the front closing door is closed are provided. Therefore, it is possible to provide a summons part water stop structure that can relieve partial stress concentration during closing to ensure uniform watertightness and prevent partial deterioration of the elastic seal body disposed on the water stop member.

[0160] 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 modifications can be made according to design and the like as long as they are within the scope not departing from the technical idea of the present invention even if they are other than the above-described embodiments.

Explanation of Signs

[0161] 10 Water stop door device 11 Water stop member 12 Door frame 13 Door 13k Sub - door 13o Main door 22 Elastic seal body 24 Clearance for rotation 26 Summons part 27w Curved part 50 Arc - shaped outer plate 50a Arc - curved surface part 51b Inclined surface part 52 Elastic seal body βk Angle βo Angle M1 Tangent line M2 Tangent line S Water stop structure S1 Structure on the suspension side S2 Summons part water stop structure S3 Structure on the lower frame side

Claims

1. In a water-stop structure for the mating part of two closing doors in a closed state, an arc-shaped water-stop member convexly disposed on the protection area side so as to be bridged from the lower end on the door tip side of the first closing door upward along the mating part to the door tip side of the second closing door; an arc-shaped fitting recess formed in the lower frame of the door frame where the lower end portion of the arc-shaped water-stop member fits through an elastic sealing body when the first closing door is closed; A water-stop structure for the mating part, characterized by comprising the above.

2. The angle formed by the tangent line of the end on the first closing door side of the arc part in the cross-section view in the plane direction of the arc-shaped water-stop member and the door surface on the protection area side when the first closing door is closed, The angle formed by the tangent line of the end on the second closing door side of the arc part and the door surface on the protection area side when the second closing door is closed are each obtuse angles. The water-stop structure for the mating part according to Claim 1.

3. The opposing surface of the arc-shaped water-stop member to the second closing door is provided with an inclined surface where the gap gradually expands from the door tip side to the hanging end side of the second closing door, and a trapezoidal elastic sealing body is disposed on the inclined surface in the cross-section view in the plane direction. The water-stop structure for the mating part according to Claim 1.

4. A water-stop structure for two closing doors in a closed state, The water-stop structure for the mating part according to Claim 1 for preventing water ingress from the mating part of the first closing door and the second closing door, A hanging-end water-stop structure for preventing water ingress from the gap in the door frame on the hanging-end side of each of the first closing door and the second closing door, A hem water-stop structure for preventing water ingress from the gap in the door frame at the hem of each of the first closing door and the second closing door, A water-stop structure for two closing doors, characterized by comprising the above.

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