JP7775037B2 - Water-resistant door structure - Google Patents

Description

The present invention relates to a water-resistant structure for a door device.

With the recent increase in sudden heavy rainstorms, awareness of urban disaster prevention has increased, and there is an increasing demand for waterproof doors as a measure against flooding at building openings. Traditionally, waterproof structures have generally been designed assuming a flood height of 2m, but there are cases where a waterproof structure that can withstand higher flood heights (e.g., 3m) is required. Because the pressure acting on a door body in a fully closed position increases in proportion to the flood height, conventional waterproof structures designed assuming a flood height of 2m may experience excessive deformation of the door device's components or damage to the connections between the components when subjected to water pressure from a flood height of 3m, for example.

When water pressure acts on the outdoor portion of a door device in a fully closed position, the water pressure also acts on the door frame via the door body. Conventional door frame bottoms (sills) are formed by welding multiple components together (see Patent Document 1, Figure 3, etc.), and when high water pressure (for example, water pressure from a flood height of 3m) acts on the bottom frame, a large force acts on the connections, potentially damaging the bottom frame.

To explain more specifically with reference to Figure 12, a conventional lower frame consists of a first member having a first side a1 extending in the indoor/outdoor direction, a second side a2 rising vertically from the outdoor end of the first side a1, and a third side a3 extending horizontally from the top end of the second side a2 to the indoor side, and a second member having a horizontal folded-back portion b on the outdoor side. The lower frame is formed by plug welding the upper surface of the third side a3 of the first member to the underside of the folded-back portion b of the second member. A U-shaped groove (pocket portion) in cross section is formed by the first side a1 and second side a2 of the first member and the outdoor-facing portion of the folded-back portion b of the second member, and a watertight member is attached to the pocket portion. When water pressure acts on the door body while the opening is in the fully closed position, the door body presses against the watertight member and displaces toward the indoor side, coming into contact with the tip of the folded-back portion b of the second member, exerting a force that presses the folded-back portion b toward the indoor side.

The first and second members are structured in such a way that their shear strength depends on the plug weld between the horizontally extending members (the third side a3 of the first member and the folded-back bend b of the second member). However, when water pressure acts on the lower frame, the force acts in a direction that shifts the third side a3 of the first member and the folded-back bend b of the second member. Therefore, when large water pressure (for example, water pressure at a flood height of 3 m) acts on the lower frame, it must be avoided that a large force acts on the connection and the lower frame is damaged.
Patent Publication No. 2021-050562

The present invention aims to improve the water pressure resistance of door frames formed from multiple components.

The technical means adopted by the present invention are:
A water-resistant structure of a door device in which a door body closes an opening formed by a four-perimeter frame,
The four-sided frame includes a first surface portion to which the end surface of the door body faces when the opening is fully closed, a second surface portion located on the indoor side of the first surface portion, and a recessed groove located between the indoor side portion of the first surface portion and the outdoor side portion of the second surface portion, formed to open to the outdoor side, and having a watertight member attached around the four sides thereof;
The groove includes a first surface and a second surface facing each other, and a bottom surface.
At least one of the four peripheral frames is formed from a first member that forms the first surface portion and a second member that forms the second surface portion,
The first member includes a first side that forms the first surface and an indoor support side (second sides 331, 331′, fourth sides 233, 233′) that is located on the indoor side relative to the bottom surface of the groove,
the second member includes a first side that forms the second surface, a second side that overlaps with an inner surface of an outdoor-side portion of the first side to form a folded-back portion, and a third side that extends outward from an indoor-side end portion of the second side,
The first surface of the groove is made up of a portion of the first member (the indoor side portion of the first side 330 and the outdoor side portion of the third side 232),
the second surface of the recessed groove is formed by the second side of the second member,
the bottom surface of the recessed groove is formed by the third side of the second member,
the third edge of the second member is directly or indirectly supported from the indoor side by the indoor side support edge of the first member;
The door device has a water-resistant structure.
In one aspect, the first surface of the recessed groove is formed from an indoor side portion of the first side of the first member.

In one aspect, the indoor side support edge of the first member is an edge that extends inward from the indoor side end of the first surface of the recessed groove,
The indoor side support edge is welded to the rear surface of the third edge of the second member in a state of contact with the indoor side.
By improving the configuration of the upper frame 2' of the second embodiment described below (configuration without the third member 25), the fourth edge 233' may be made to function as the indoor side support edge (see Figure 11).
In one aspect, the indoor side support edge of the first member is a second edge extending inward from an indoor side end of the first edge,
The second side of the first member is welded to the rear surface of the third side of the second member in a state of contact with the rear surface from the indoor side.

In one embodiment, the at least one frame is a lower frame;
the first member includes a first side that forms the first surface and a second side that rises perpendicularly from an indoor side end of the first side,
the second member includes a horizontal first side that forms the second surface, a horizontal second side that overlaps with a lower surface of an outdoor-side portion of the first side to form a horizontal folded portion, and a third side that hangs down from an indoor-side end portion of the second side,
The second side of the first member is welded in contact with the back surface of the third side of the second member, which forms the bottom surface of the recessed groove.

In one aspect, the indoor side support edge of the first member faces the indoor side of the third edge of the second member at a distance,
a third member is provided between the indoor side support edge of the first member and the third edge of the second member,
The third member is welded to the first member and the second member.

In one aspect, the first member includes a third side (third side 332, 332′, fifth side 234, 234′) extending from an end of the indoor side support side toward the indoor side,
The third side of the first member abuts against the inner surface of the first side of the second member.
In one aspect, the indoor side support edge of the first member is a second edge extending inward from an indoor side end of the first edge, and the first member includes a third edge extending toward the indoor side from an end of the second edge,
The third side of the first member abuts against the inner surface of the first side of the second member at a portion adjacent to the folded-back portion.

The technical means adopted by the present invention are:
The lower frame of the door device includes a first surface portion to which the lower end of the door body faces when the opening is fully closed, a second surface portion located on the indoor side of the first surface portion, and a recessed groove formed between the indoor side portion of the first surface portion and the outdoor side portion of the second surface portion, opening to the outdoor side, and into which a watertight member is attached;
the lower frame includes a first member including the first surface portion and a second member including the second surface portion,
the first member includes a first side that forms the first surface portion and a second side that rises perpendicularly from an indoor side end of the first side,
the second member includes a horizontal first side that forms the second surface portion, a horizontal second side that overlaps with a lower surface of an outdoor-side portion of the first side to form a horizontal folded-back portion, and a third side that hangs down from an indoor-side end portion of the second side,
The groove includes a first surface on the lower side and a second surface on the upper side that face each other, and a bottom surface that is a vertical surface,
the first surface of the recessed groove is formed from an indoor side portion of the first side of the first member,
the second surface of the recessed groove is formed by the second side of the second member,
the bottom surface of the recessed groove is formed from the third side of the second member,
the second side of the first member is welded in a state in which it abuts against the back surface of the third side of the second member that forms the bottom surface of the recessed groove;
The door device has a water-resistant structure.
In one aspect, the first member includes a third side extending horizontally from an end of the second side toward the indoor side,
The third side of the first member abuts against the lower surface of the first side of the second member at a portion adjacent to the folded-back portion.

In the present invention, in a door frame made up of multiple connected components, the bottom surface of the groove into which the watertight component is attached is made up of part of one component, and the bottom surface of the groove is supported from the indoor side by the indoor side support edge of another component, thereby resisting water pressure acting from the outdoor side.
Furthermore, when the bottom surface of the groove is welded with two sides abutting, the force acting on the bottom surface of the groove acts in a direction that maintains the abutting state of the two sides (a direction perpendicular to the direction in which the welded portion is peeled off), thereby improving the water pressure resistance of the door frame made up of multiple connected components.

1 is a front view of a door device (fully closed state) according to a first embodiment, as viewed from the outdoor side. FIG. 1 is a cross-sectional view of a door device (fully closed state) according to a first embodiment. FIG. 1 is a vertical cross-sectional view of a door device (fully closed state) according to a first embodiment. FIG. FIG. 4 is a partial enlarged view of the lower portion of FIG. 3 . FIG. 11 is a front view of a door device (fully closed state) according to a second embodiment, as viewed from the outdoor side. FIG. 10 is a cross-sectional view of a door device (fully closed state) according to a second embodiment. FIG. 10 is a vertical cross-sectional view of a door device (fully closed state) according to a second embodiment. FIG. 8 is a partial enlarged view of the upper portion of FIG. 7 . A diagram explaining the function of the water-resistant structure of the lower frame in this embodiment. 1 shows a modified example of a lower frame with a water pressure resistant structure. A modified example of an upper frame with a water pressure resistant structure is shown. 10A and 10B are diagrams illustrating the case where water pressure acts on a conventional lower frame. A figure showing an embodiment of a reinforcing structure for a lower frame using a connecting member. 14 is a view similar to FIG. 13, showing another embodiment of the connecting member; FIG. 10A and 10B are schematic diagrams illustrating deformation of the lower frame that may occur when a large water pressure acts on the lower frame.

Embodiments of the present invention will be described with reference to the drawings. This specification discloses two embodiments: a first embodiment (Figs. 1 to 4) relating to a single-swing door, and a second embodiment (Figs. 5 to 8) relating to a double-swing door. Fig. 1 is a front view of a door device (fully closed state) according to the first embodiment, viewed from the outdoor side. Figs. 2 and 3 are a cross-sectional view and a vertical cross-sectional view, respectively, of the door device (fully closed state) according to the first embodiment, and Fig. 4 is a partial enlarged view of the lower portion of Fig. 3. Fig. 5 is a front view of a door device (fully closed state) according to the second embodiment, viewed from the outdoor side. Figs. 6 and 7 are a cross-sectional view and a vertical cross-sectional view, respectively, of the door device (fully closed state) according to the second embodiment, and Fig. 8 is a partial enlarged view of the upper portion of Fig. 7. In Figs. 2 and 6, the lower side is the outdoor side and the upper side is the indoor side. In Figs. 3 and 7, the left side is the outdoor side and the right side is the indoor side. In Figs. 2 to 4 and Figs. 6 to 8, arrows indicate the direction of water pressure load.

The waterproof structure of this embodiment is designed to prevent water generated on the outdoor side from seeping into the indoor side. In this specification, the terms "outdoor side" and "indoor side" not only define when an element is actually located on the outdoor side or indoor side, but are also used to define the part or portion of an element, for example, the part of an element that is actually located on the indoor side that is closest to the outdoor side. Also, please note that in this specification, when referring to door frame elements that form the perimeter of an opening, the side closest to the opening will sometimes be referred to as the "inside" and the side furthest from the opening as the "outside."

[A] First Embodiment The door device shown in Figure 1 is a single-leaf door equipped with a door body 1 that opens and closes a building opening formed by a door frame. The door body 1, which is in a closed position, is rotated toward the outside to open the building opening. The door frame is formed into a four-sided frame shape consisting of a horizontally extending upper frame 2, a horizontally extending lower frame (sill) 3, a vertically extending leading edge frame 4, and a vertically extending trailing edge frame 5. The trailing edge portion of the door body 1 is rotatably attached to the trailing edge frame 5.

The door body 1 has a vertically rectangular outdoor side portion 10, a vertically rectangular indoor side portion 11, an upper end surface 12, a lower end portion 13, a leading end surface 14, and a trailing end surface 15. The trailing end side of the outdoor side portion 10 of the door body 1 is rotatably attached to the trailing end vertical frame 5 of the door frame by a hinge 16. The hinge 16 in this embodiment is a so-called biaxial hinge, which allows the door body 1 in a closed state to be pushed toward the indoor side (by water pressure or a pressing means). When the door body 1 is pushed in its normal closed position, the periphery of the indoor side portion 11 of the door body 1 is tightly sealed with a watertight member 18, resulting in a watertight structure. Handles H, which are used to open and close the door body 1, are attached to the leading end sides of the outdoor side portion 10 and indoor side portion 11 of the door body 1.

The door body 1 is composed of a structural body made of framework, or frames, and a surface material attached to the structural body. The structural body of the door body 1 is made up of a four-sided frame consisting of an upper frame 6, a lower frame 7, a leading vertical frame 8, and a trailing vertical frame 9, as well as multiple intermediate vertical frames 17 arranged side by side at intervals across the width of the door body 1. The structural body and surface material in this embodiment are made of steel.

As shown in Figures 2 and 3, the upper frame 6 is a long member extending horizontally in the width direction of the door body 1 and consists of an upper surface 60, an outdoor facing surface 61, and an indoor facing surface 62. The lower frame 7 is a long member extending horizontally in the width direction of the door body 1 and consists of an upper surface 70, an outdoor facing surface 71, and an indoor facing surface 72. The leading edge vertical frame 8 is a long member extending perpendicular to the height direction of the door body 1 and consists of a leading edge facing surface 80, an outdoor facing surface 81, and an indoor facing surface 82. The trailing edge vertical frame 9 is a long member extending perpendicular to the height direction of the door body 1 and consists of a trailing edge facing surface 90, an outdoor facing surface 91, and an indoor facing surface 92.

As shown in Figures 2 and 3, the intermediate vertical frame 17 is a long member extending perpendicular to the height of the door body 1 and comprises a projected surface 170, an outdoor-facing surface 171, and an indoor-facing surface 172. In this embodiment, the projected surfaces 170 of two intermediate vertical frames 17 are abutted against each other (in one embodiment, they are fixed by welding), forming a rib consisting of a pair of intermediate vertical frames 17. Conventionally, the strength of a door body has been improved by arranging ribs, each made of a U-shaped member in cross section, at regular intervals across the width. However, the rib structure of conventional waterproof doors is designed for a flood height of 2 meters. If a door in a fully closed position is subjected to water pressure from a flood height of 3 meters, the door may deform, bulging significantly toward the interior, and the water pressure structure may not be able to be maintained. In this embodiment, the rib is formed from a pair of intermediate vertical frames 17 whose projected surfaces 170 abut against each other, thereby improving the rigidity, i.e., strength, of the door body 1.

As shown in Figures 2 and 3, the surface material of the door body 1 consists of a first surface material that forms the outdoor side surface portion 10, the outdoor half of the upper end surface 12, the outdoor half of the leading end surface 14, and the outdoor half of the trailing end surface 15, and a second surface material that forms the indoor side surface portion 11, the indoor half of the upper end surface 12, the indoor half of the leading end surface 14, and the indoor half of the trailing end surface 15. The first and second surface materials in this embodiment are U-shaped in cross section and inverted L-shaped in vertical section.

The first surface material is fixed (by welding or adhesive) to the outdoor facing surface 61 of the upper frame 6, the outdoor half of the upper surface 60, the outdoor facing surface 71 of the lower frame 7, the outdoor facing surface 81 of the leading vertical frame 8, the outdoor half of the leading facing surface 80, the outdoor facing surface 91 of the trailing vertical frame 9, and the outdoor half of the trailing facing surface 90. The second surface material is fixed (by welding or adhesive) to the indoor facing surface 62 of the upper frame 6, the indoor half of the upper surface 60, the indoor facing surface 72 of the lower frame 7, the indoor facing surface 82 of the leading vertical frame 8, the indoor half of the leading facing surface 80, the indoor facing surface 92 of the trailing vertical frame 9, and the indoor half of the trailing facing surface 90.

The structure of the door frame according to this embodiment will now be described in detail. The door frame is formed into a four-sided frame by connecting (typically by welding) both longitudinal ends of the horizontally extending upper frame 2 to the upper ends of the vertically extending front-end vertical frame 4 and the vertically extending rear-end vertical frame 5, and connecting (typically by welding) both longitudinal ends of the horizontally extending lower frame 3 to the lower ends of the vertically extending front-end vertical frame 4 and the vertically extending rear-end vertical frame 5. In this embodiment, the upper frame 2 and the left and right vertical frames 4 and 5 are made of steel, and the lower frame 3 is made of stainless steel, although this is not limited to this.

As shown in Figure 3, the upper frame 2 comprises an outdoor facing portion 20, an indoor facing portion 21, and a bottom surface 22. The bottom surface 22 is composed of a horizontal outdoor side surface 220, a horizontal indoor side surface 221, and a groove 222 opening to the outdoor side. In the illustrated embodiment, the upper frame 2, which comprises the outdoor facing portion 20, the indoor facing portion 21, and the bottom surface 22 (including the groove 222), is obtained by bending and forming a single member into a predetermined shape. The height position of the outdoor side surface 220 is higher than the height position of the indoor side surface 221, and the indoor side portion of the outdoor side surface 220 and the outdoor side portion of the indoor side surface 221 are spaced apart in a stepped manner, with the groove 222 formed between the indoor side portion of the outdoor side surface 220 and the outdoor side portion of the indoor side surface 221. A long watertight member (watertight rubber) 18 is attached to the groove 222, which extends horizontally across the width of the building opening.

As shown in FIG. 3 , the lower frame 3 includes an outdoor facing portion 30, an indoor facing portion 31, and an upper surface portion 32. The upper surface portion 32 includes an inclined outdoor side portion 320, a horizontal indoor side portion 321, and a groove 322 that opens to the outdoor side. In the illustrated embodiment, the lower frame 3, including the outdoor facing portion 30, the indoor facing portion 31, and the upper surface portion 32 (including the groove 322), is obtained by connecting a first member 33 and a second member 34 that are bent into a predetermined shape. The configurations of the first member 33 and the second member 34 will be described later. The height position of the outdoor side portion 320 is lower than the height position of the indoor side portion 321. The indoor side portion of the outdoor side portion 320 and the outdoor side portion of the indoor side portion 321 face each other in a stepped manner, and a groove 322 is formed between the indoor side portion of the outdoor side portion 320 and the outdoor side portion of the indoor side portion 321. A long watertight member (watertight rubber) 18 is attached to the groove 322 that extends in the width direction of the building opening.

As shown in FIG. 2, the leading edge vertical frame 4 comprises an outdoor facing portion 40, an indoor facing portion 41, and a visible surface portion 42. The visible surface portion 42 comprises a vertically extending outdoor side portion 420, a vertically extending indoor side portion 421, and a groove 422 that opens to the outdoor side. In the illustrated embodiment, the leading edge vertical frame 4, which comprises the outdoor facing portion 40, the indoor facing portion 41, and the visible surface portion 42 (including the groove 422), is obtained by bending and forming a single member into a predetermined shape. The outdoor side portion 420 is located outside the indoor side portion 421, and the indoor side portion of the outdoor side portion 420 and the outdoor side portion of the indoor side portion 421 face each other in a stepped manner, with the groove 422 formed between the indoor side portion of the outdoor side portion 420 and the outdoor side portion of the indoor side portion 421. A long watertight member (watertight rubber) 18 is attached to the recessed groove 422 that extends in the height direction of the building opening.

As shown in FIG. 2, the trailing edge vertical frame 5 includes an outdoor facing portion 50, an indoor facing portion 51, and a visible surface portion 52. The visible surface portion 52 is composed of a vertically extending outdoor side surface portion 520, a vertically extending indoor side surface portion 521, and a groove 522 that opens to the outdoor side. In the illustrated embodiment, the trailing edge vertical frame 5, including the outdoor facing portion 50, the indoor facing portion 51, and the visible surface portion 52 (including the groove 522), is obtained by bending and forming a single member into a predetermined shape. The outdoor side surface portion 520 is located outside the indoor side surface portion 521, and the indoor side portion of the outdoor side surface portion 520 and the outdoor side portion of the indoor side surface portion 521 face each other in a stepped manner, with the groove 522 formed between the indoor side portion of the outdoor side surface portion 520 and the outdoor side portion of the indoor side surface portion 521. A long watertight member (watertight rubber) 18 is attached to the recessed groove 522 that extends in the height direction of the building opening.

The grooves 222, 322, 422, 522 formed in the door frame form a U-shaped pocket in cross section, consisting of an inner portion (the folded portion of the outdoor side of the indoor side portion 221, 321, 421, 521), an outer portion (the indoor side of the outdoor side portion 220, 320, 420, 520), and a bottom portion, and the inner surface of the grooves 222, 322, 422, 522, i.e., the pocket, consists of a first surface on the inner surface of the outer portion, a second surface on the inner surface of the inner portion, and a bottom surface on the inner surface of the bottom portion. The groove 222 formed in the upper frame 2, the groove 322 formed in the lower frame 3, the groove 422 formed in the leading vertical frame 4, and the groove 522 formed in the trailing vertical frame 5 are continuous all around when viewed from the front from the outside, and the watertight members 18 attached to the grooves 222, 322, 422, 522 are continuous all around.

The watertight member 18 consists of a base 180 that is fitted into the grooves 222, 322, 422, and 522, and a contactable portion 181 that comes into contact with the door body 1 when in the fully closed position (see Figure 4).When the watertight member 18 is attached to the grooves 222, 322, 422, and 522, the contactable portion 181 of the watertight member 18 (reference number 181 is shown as a representative in Figure 4) is located outside the outdoor ends of the inner parts of the grooves 222, 322, 422, and 522 (the outdoor end of the indoor side portion 221 of the upper frame 2, the outdoor end of the indoor side portion 321 of the lower frame 3, the outdoor end of the indoor side portion 421 of the front vertical frame 4, and the outdoor end of the indoor side portion 521 of the rear vertical frame 5). That is, the watertight member 18 has a portion (contact portion 181) that is located outside the recessed grooves 222, 322, 422, and 522, and when the opening is fully closed, the four peripheral edges of the indoor side surface portion 11 of the door body 1 come into contact with this portion.

When the door body 1 is in the fully closed position, the upper end surface 12 of the door body 1 faces the outdoor side surface 220 of the upper frame 2 at a distance, the upper end portion of the indoor side surface 11 of the door body 1 abuts the watertight member 18, the lower end surface 13 of the door body 1 faces the outdoor side surface 320 of the lower frame 3 at a distance, the lower end portion of the indoor side surface 11 of the door body 1 abuts the watertight member 18, the leading end surface 14 of the door body 1 faces the outdoor side surface 420 of the leading vertical frame 4 at a distance, the leading side portion of the indoor side surface 11 of the door body 1 abuts the watertight member 18, the trailing end surface 15 of the door body 1 faces the outdoor side surface 520 of the trailing vertical frame 5 at a distance, the leading side portion of the indoor side surface 11 of the door body 1 abuts the watertight member 18, and a four-way waterproof structure is formed around the door body 1. The watertight member 18 also functions as a buffer member that prevents the door body 1 from directly contacting the door frame.
When water pressure acts, the door body 1 in the fully closed position is pushed toward the indoor side, and the four peripheral parts of the indoor side part 11 of the door body 1 are pressed against the watertight member 18 to maintain the waterproof structure.

With reference to Figure 4, the configuration of the lower frame 3 according to this embodiment will be described in detail. The lower frame 3 is made by bending a stainless steel plate into a predetermined shape and consists of a long first member 33 extending in the width direction of the opening, and a long second member 34 also formed by bending a stainless steel plate into a predetermined shape and extending in the width direction of the opening. The first member 33 has a portion that forms the outdoor side surface 320 and outdoor facing portion 30 of the upper surface 32 of the lower frame 3, and the second member 34 has a portion that forms the indoor side surface 321 and indoor facing portion 31 of the upper surface 32 of the lower frame 3.

As shown in FIG. 4, the first member 33 consists of a first side 330 that extends at an upward angle from the outdoor side toward the indoor side, a second side 331 that rises vertically from the indoor side end of the first side 330, a third side 332 that extends horizontally from the upper end of the second side 331 toward the indoor side, a fourth side 333 that hangs down from the outdoor side end of the first side 330, a fifth side 334 that extends horizontally from the lower end of the fourth side 333 toward the indoor side, and a sixth side 335 that hangs down from the indoor side end of the fifth side 334. The first side 330 of the first member 33 forms the outdoor side portion 320 of the upper surface portion 32 of the lower frame 3, and the fourth side 333 of the first member 33 forms the outdoor facing portion 30 of the lower frame 3.

As shown in FIG. 4 , the second member 34 consists of a horizontally extending first side 340, a horizontal second side 341 that overlaps the inner surface of the outdoor portion of the first side 340 to form a folded portion, a third side 342 that hangs down from the indoor end of the second side 341, and a fourth side 343 that hangs down from the indoor end of the first side 340. The first side 340 of the second member 34 forms the indoor side portion 321 of the upper surface 32 of the lower frame 3, and the fourth side 343 of the second member 34 forms the indoor facing portion 31 of the lower frame 3. The folded portion formed by the outdoor portion of the first side 340 and the second side 341 is formed, for example, by hemming.

The groove 322 is formed from an upper portion (inner portion), a lower portion (outer portion), and a bottom portion. The upper portion of the groove 322 consists of the folded portion of the second member 34, with the second edge 341 of the second member 34 forming the inner surface of the upper portion. The lower portion of the groove 322 consists of the indoor side portion of the first edge 330 of the first member 33.

The bottom surface of the groove 322 consists of an overlapping portion formed by welding (plug welding) the second edge 331 of the first member 33 and the third edge 342 of the second member 34 in an abutting state. At the overlapping portion, the third edge 342 of the second member 34 is located on the outdoor side and forms the inner surface of the bottom surface, while the second edge 331 of the first member 33 is located on the indoor side and abuts against the back surface (indoor surface) of the third edge 342 of the second member 34. The third edge 332 of the first member 33 abuts (or may be welded to) the underside of a portion of the first edge 340 of the second member 34 adjacent to the folded portion.

As described above, the first embodiment is a water-resistant structure of a door device in which a door body 1 closes an opening formed by four surrounding frames (an upper frame 2, a lower frame 3, a door-leading side vertical frame 4, and a door-trailing side vertical frame 5),
The four-sided frame includes a first surface (outdoor side surface 220, 320, 420, 520) that faces the end surface of the door body when the opening is fully closed, a second surface (indoor side surface 221, 321, 421, 521) that is located on the indoor side of the first surface, and grooves 222, 322, 422, 522 that are located between the indoor side portion of the first surface and the outdoor side portion of the second surface, are formed to open to the outdoor side, and have watertight members fitted around the four sides.
The lower frame 3 of the four-perimeter frame is formed from a first member 33 forming a first surface portion (outdoor side surface portion 320) and a second member 34 forming a horizontal second surface portion (indoor side surface portion 321),
The first member 33 includes a first side 330 that forms a first surface portion (outdoor side surface portion 320), a second side 331 that rises vertically from the indoor side end portion of the first side 330, and a third side 332 that extends horizontally from the upper end of the second side 331 toward the indoor side,
The second member 34 includes a horizontal first side 340 that forms a second surface portion (indoor side surface portion 321), a horizontal second side 341 that overlaps with the underside of the outdoor side portion of the first side 340 to form a horizontal folded portion, and a third side 342 that hangs down from the indoor side end portion of the second side 341,
The groove 322 is made up of a first surface on the lower side, a second surface on the upper side, and a bottom surface that is a vertical surface,
The first surface of the groove 322 is formed by the indoor side portion of the first side 330 of the first member 33.
The second surface of the recessed groove 322 is formed by the second side 341 of the second member 34.
The bottom surface of the recessed groove 322 is formed from the third side 342 of the second member 34.
The second side 331 of the first member 33 is welded in abutting contact with the back surface of the third side 342 of the second member 34, which forms the bottom surface of the recessed groove 322, and the bottom surface portion of the recessed groove 322 is formed by an overlapping portion formed by welding the second side 331 of the first member 33 and the third side 342 of the second member 34 in abutting contact with each other,
the third side 332 of the first member 33 abuts against the underside of a portion of the first side 340 of the second member 34 that is adjacent to the folded-back portion;
A water pressure resistant structure for a door device is disclosed.

[B] Second Embodiment: A door device according to a second embodiment will be described with reference to Figures 5 to 8. The door device according to the second embodiment is a so-called double-swing door, consisting of a door frame that forms a building opening and a first door body 1A and a second door body 1B that open and close the building opening. The basic structure of the first door body 1A and the second door body 1B is similar to that of the door body 1 according to the first embodiment. Each door body is composed of a four-sided frame consisting of an upper frame 6, a lower frame 7, a leading-edge vertical frame 8, and a trailing-edge vertical frame 9, a structural body consisting of an intermediate vertical frame 17, and a surface material fixed to the structural body. Similar to the door body 1, the first door body 1A and the second door body 1B each have a central rib formed from a pair of intermediate vertical frames 17 abutting each other at their projected surfaces 170, thereby improving the rigidity, i.e., strength, of the first door body 1A and the second door body 1B.

The first door body 1A has a vertically rectangular outdoor side portion 10, a vertically rectangular indoor side portion 11, an upper end surface 12, a lower end portion 13, a leading end surface 14A, and a trailing end surface 15. The trailing end side of the outdoor side portion 10 of the first door body 1A is rotatably attached to the first vertical frame (the trailing end vertical frame) 5A of the door frame by a hinge 16 consisting of a biaxial hinge. A cremone handle GH is provided at the lower portions of the outdoor side portion 10 and the indoor side portion 11 of the first door body 1A as a means for pressing the first door body 1A.

The second door body 1B has a vertically rectangular outdoor side portion 10, a vertically rectangular indoor side portion 11, an upper end surface 12, a lower end portion 13, a leading end surface 14B, and a trailing end surface 15. The trailing end side of the outdoor side portion 10 of the second door body 1B is rotatably attached to the second vertical frame (the trailing end vertical frame) 5B of the door frame by a hinge 16 consisting of a biaxial hinge. A cremone handle GH is provided at the lower portion of the outdoor side portion 10 and the indoor side portion 11 of the second door body 1B as a means for pressing the second door body 1B. A handle H used to open and close the second door body 1B is attached to the leading end side of the outdoor side portion 10 and the indoor side portion 11 of the second door body 1B.

As shown in Figure 6, when the opening is fully closed, the leading edge portion of the first door body 1A and the leading edge portion of the second door body 1B form a joint. A step 140A is formed on the outdoor side of the leading edge end face 14A of the first door body 1A. A protrusion 140B protruding in the view direction from the leading edge end face 14B is formed on the outdoor side of the leading edge end face 14B of the second door body 1B. When the first door body 1A and the second door body 1B are in the closed position, the leading edge end face 14A of the first door body 1A and the leading edge end face 14B of the second door body 1B face each other, and the protrusion 140B of the second door body 1B is positioned at the step 140A of the first door body 1A.

The first door body 1A and the second door body 1B are designed to open the building opening by rotating them from a closed position toward the outdoors. Under normal circumstances, the first door body 1A is in a closed position, closing one width half of the building opening, and the other width half of the building opening is opened or closed by opening or closing the second door body 1B, with the second door body 1B functioning as the parent door or main door and the first door body 1A functioning as the child door or sub-door. Furthermore, if necessary, both the first door body 1A and the second door body 1B can be opened to open the entire width of the building opening.

As shown in Figures 6 and 7, a vertically extending joint member 19 protrudes from the leading edge of the indoor side surface 11 of the first door body 1A. The joint member 19 has a groove extending vertically from the leading edge end surface 14A of the first door body 1A in the forward direction (away from the leading edge end surface 14A) and opening toward the outdoors. A second watertight member 18' (watertight rubber) is attached to the groove along its entire height. When the first door body 1A and the second door body 1B are in the fully closed position, the watertight member 18' on the first door body 1A is in close contact with the leading edge of the indoor side surface 11 of the second door body 1B. A French stop (represented by reference number 190) is attached to the joint member 19 according to the embodiment as a means for securing the first door body 1A in the closed position.

As shown in Figure 5, the door frame of the second embodiment is formed into a four-sided frame shape consisting of a horizontally extending upper frame 2', a horizontally extending lower frame 3, a vertically extending first vertical frame 5A, and a vertically extending second vertical frame 5B. As shown in Figure 7, the upper frame 2' includes an outdoor facing portion 20, an indoor facing portion 21, and a bottom surface 22'. The bottom surface 22' includes a horizontal outdoor side surface 220', a horizontal indoor side surface 221', and a recessed groove 222 opening to the outdoor side. The upper frame 2' of this embodiment is formed by connecting a first member 23 including the outdoor facing portion 20 and the outdoor side surface 220', a second member 24 including the indoor side facing portion 21 and the indoor side surface 221', and a third member 25 that is U-shaped in cross section. The first member 23, second member 24, and third member 25 are all elongated members that extend in the opening width direction.

As shown in Figure 8, the first member 23 consists of a first side 230 (outdoor side portion 220') extending horizontally, a second side 231 hanging down from the indoor side end of the first side 230, a third side 232 extending horizontally from the lower end of the second side 231 toward the indoor side, a fourth side 233 hanging down from the indoor side end of the third side 232, a fifth side 234 extending horizontally from the lower end of the fourth side 233 toward the indoor side, a sixth side 235 (outdoor facing portion 20) rising vertically from the outdoor side end of the first side 230, a seventh side 236 extending horizontally from the upper end of the sixth side 235 toward the indoor side, and an eighth side 237 rising vertically from the indoor side end of the seventh side 236.

As shown in Figure 8, the second member 24 consists of a horizontally extending first side 240 (indoor side portion 221'), a horizontal second side 241 that overlaps with the inner surface (top surface) of the outdoor portion of the first side 240 to form a folded portion, a third side 242 that rises vertically from the indoor end of the second side 241, a fourth side 243 (indoor facing portion 21) that rises vertically from the indoor end of the first side 240, and a fifth side 244 that extends horizontally from the top end of the fourth side 243 toward the outdoor side.

The fifth edge 234 of the first member 23 abuts against the inner surface (top surface) of the first edge 240 of the second member 24 and is connected by plug welding. In this state, the second edge 231 of the first member 23 and the tip of the folded portion of the second member 24 (the tip of the first edge 240) are located on the same vertical plane. The second edge 241 of the second member 24 faces the outdoor portion of the third edge 232 of the first member 23 at a distance, and the upper end of the third edge 242 of the second member 24 abuts against the lower surface of the third edge 232 of the first member 23. The outdoor portion of the third edge 232 of the first member 23, the folded portion of the second member 24, and the third edge 242 form a groove 222 that opens indoors and extends horizontally in the width direction of the building opening. A long, watertight member (watertight rubber) 18 extending in the width direction of the opening is attached to the groove 222.

As shown in Figure 8, the third member 25 is a long member that extends in the width direction of the opening and has a U-shaped cross section made up of a vertical side 250, an upper side 251 that extends horizontally from the top end of the vertical side 250 toward the indoor side, and a lower side 252 that extends horizontally from the bottom end of the vertical side 250 toward the indoor side. A space that is rectangular in cross section is formed by the indoor side portion of the third side 232 of the first member 23, the fourth side 233, the portion adjacent to the folded portion of the first side 240 of the second member 24, and the third side 242, and the third member 25 is housed in this space.

The vertical edge 250 of the third member 25 abuts against the back surface (indoor surface) of the third edge 242 of the second member 24 and is connected by plug welding, the upper edge 251 abuts against the underside of the indoor portion of the third edge 232 of the first member 23 and is connected by plug welding, the lower edge 252 abuts against the upper surface of the portion adjacent to the folded portion of the first edge 240 of the second member 24, and the indoor end of the upper edge 251 and the indoor end of the lower edge 252 abut against the outdoor surface of the fourth edge 233 of the first member.

As described above, the upper frame 2′ of the second embodiment is formed from the first member 23 that forms the first surface portion and the second member 24 that forms the second surface portion,
The first member 23 includes a first side 230 that forms a first surface portion, and an indoor side support side (fourth side 233) that is located on the indoor side relative to the bottom surface of the recessed groove 222,
The second member 24 includes a first side 240 that forms a second surface portion, a second side 241 that overlaps with the inner surface of the outdoor side portion of the first side 240 to form a folded portion, and a third side 242 that rises vertically from the indoor side end portion of the second side 241,
The first surface of the recessed groove 222 is formed from the outdoor portion of the third side 232 of the first member 23,
The second surface of the groove 222 is formed from the second side 241 of the second member 24.
The bottom surface of the recessed groove is formed from the third side 242 of the second member 24.
The indoor side support edge (fourth edge 233) of the first member 23 faces the indoor side of the third edge 242 of the second member 24 at a distance.
A third member 25 is provided between the indoor side support edge (fourth edge 233) of the first member 23 and the third edge 242 of the second member 24.
The vertical edge 250 of the third member 25 is welded to the third edge 242 of the second member 24 in abutting contact therewith, and the upper edge 251 of the third member 25 is welded to the third edge 232 of the first member 23 in abutting contact therewith.
The third side 242 of the second member 24 is indirectly supported from the indoor side by the indoor side support side (fourth side 233) of the first member 23 via the third member 25.
The structure of this upper frame 2' is a water pressure resistant structure that can withstand forces (water pressure) acting in the direction of the arrow in the upper frame 2', which is formed by connecting the first member 23, the second member 24, and the third member 25.
It will be understood by those skilled in the art that the water-resistant structure of this upper frame 2' can also be applied to the lower frame and the left and right vertical frames as a water-resistant structure in a frame formed from multiple components.

The basic configuration of the lower frame 3 according to the second embodiment is the same as that of the lower frame 3 according to the first embodiment, and the description of the lower frame 3 according to the first embodiment can be used. The lower frame 3 according to the second embodiment is formed from a first member 33 forming a first surface portion (outdoor side surface portion 320) and a second member 34 forming a horizontal second surface portion (indoor side surface portion 321). The first member 33 includes a first edge 330 forming the first surface portion (outdoor side surface portion 320), a second edge 331 rising vertically from the indoor side end of the first edge 330, and a third edge 332 extending horizontally from the upper end of the second edge 331 toward the indoor side. The second member 34 includes a horizontal first side 340 that forms the second surface (indoor side surface 321), a horizontal second side 341 that overlaps with the underside of the outdoor portion of the first side 340 to form a horizontal folded portion, and a third side 342 that hangs down from the indoor end of the second side 341.

The groove 322 consists of opposing lower first and upper second surfaces, and a vertical bottom surface. The first surface of the groove 322 consists of the indoor-side portion of the first edge 330 of the first member 33. The second surface of the groove 322 consists of the second edge 341 of the second member 34. The bottom surface of the groove 322 is formed by the third edge 342 of the second member 34, and the second edge 331 of the first member 33 is welded (plug welded) in a contacting state to the back surface of the third edge 342 of the second member 34 that forms the bottom surface of the groove 322. The bottom portion of the groove 322 consists of an overlapping portion formed by welding the second edge 331 of the first member 33 and the third edge 342 of the second member 34 in a contacting state, and the third edge 332 of the first member 33 abuts against the underside of the portion of the first edge 340 of the second member 34 adjacent to the folded portion.

The basic configuration of the first vertical frame 5A and second vertical frame 5B in the second embodiment is the same as the configuration of the trailing edge vertical frame 5 in the first embodiment, and the description of the trailing edge vertical frame 5 in the first embodiment can be used.

The groove 222 formed in the upper frame 2, the groove 322 formed in the lower frame 3, and the grooves 522A and 522B formed in the trailing edge vertical frames 5A and 5B are continuous around the four sides when viewed from the outside. Watertight members 18 are attached around the four sides of the grooves 222, 322, 522A, and 522B. When the building opening is closed by the first door body 1A and the second door body 1B, the upper, lower, and trailing edge portions of the indoor side surface 11 of the first door body 1A and the upper, lower, and trailing edge portions of the indoor side surface 11 of the second door body 1B come into contact with the watertight members 18, thereby forming a four-sided sealed structure around the building opening. Furthermore, the leading edge portion of the indoor side surface 11 of the second door body 1B comes into contact with the watertight member 18', thereby forming a sealed structure in the height direction at the joint.

[C] Modified Door Frame with Water-Pressure-Resistant Structure Figure 10 shows a modified water-pressure-resistant structure for the bottom frame. The bottom frame 3' is formed of a first member 33', a second member 34', and a third member 35'. The first member 33' includes a first side 330' forming the first surface portion 320, a second side (indoor side support side) 331' located on the indoor side of the bottom surface of the recessed groove 322', a third side 332' extending horizontally from the upper end of the indoor side support side 331' toward the indoor side, and a fourth side 333' hanging down from the outdoor end of the first side 330'. The second member 34' includes a first side 340' forming the second surface portion 321, a second side 341' overlapping the inner surface of the outdoor-facing portion of the first side 340' to form a folded portion, a third side 342' hanging down from the indoor-side end of the second side 341', and a fourth side 343' hanging down from the indoor-side end of the first side 340'. The first surface of the groove 322' is made up of a portion of the first member 33' (a portion of the first side 330'), the second surface of the groove 322' is made up of the second side 341' of the second member 34', and the bottom surface of the groove 322' is made up of the third side 342' of the second member 34'. The indoor-side support edge 331' of the first member 33' faces the indoor side of the third edge 342' of the second member 34' at a distance, and a third member 35 having a U-shape in cross section is provided between the indoor-side support edge 331' of the first member 33' and the third edge 342' of the second member 34'. The third member 35 is welded to the first member 33' and the second member 34'. The third edge 342' of the second member 34' is indirectly supported from the indoor side by the indoor-side support edge 331' of the first member 33'.

Figure 11 shows a modified example of the water pressure resistant structure of the upper frame. The upper frame 2'' is formed from a first member 23' and a second member 24'. The first member 23' includes a first edge 230' forming the first surface portion 220', a second edge 231' hanging down from the indoor side end of the first edge 230', a third edge 232' extending horizontally from the lower end of the second edge 231' toward the indoor side, a fourth edge (indoor side support edge) 233' hanging down from the indoor side end of the third edge 232', a fifth edge 234' extending from the lower end of the fourth edge 233' toward the indoor side, and a sixth edge 235' rising vertically from the indoor side end of the first edge 230'. The second member 24' includes a first side 240' forming the second surface portion 221', a second side 241' overlapping the upper surface of the outdoor-facing portion of the first side 240' to form a folded portion, a third side 242' rising perpendicularly from the indoor-side end of the second side 241', and a fourth side 243' rising perpendicularly from the indoor-side end of the first side 240'. The first surface of the groove 222' is formed by a portion of the first member 23' (third side 232'), the second surface of the groove 222' is formed by the second side 241' of the second member 24', and the bottom surface of the groove 222' is formed by the third side 242' of the second member 24'. The third side 242' of the second member 24' is directly supported from the indoor side by the fourth side (indoor-side support side) 233' of the first member 23'.

[D] Water-Pressure-Resistant Structure of the Door Frame According to the Present Invention When water pressure acts from the outdoors while the door device according to the present invention is in the fully closed state, the four peripheral edges of the indoor side surface 11 of the door body 1, or the three edges of each of the indoor side surfaces 11 of the first door body 1A and the second door body 1B, displace toward the indoor side while pressing against the watertight members 18 attached to the recessed grooves 222, 322, 422, 522 (522A, 522B). Regardless of the flood height, greater water pressure can act on the lower portions of the outdoor side surfaces 10 of the door body 1, the first door body 1A, and the second door body 1B (when the flood height is low, water pressure acts only on the lower portions; when the flood height is high, the pressure acting on the door body increases in proportion to the flood height, so greater water pressure acts on the lower portions). Therefore, the sill 3 in particular must be water-pressure-resistant.

With reference to Figure 9, the water pressure resistant structure and function of the lower frame 3 common to the first and second embodiments will be explained. The lower frame 3 is formed from a first member 33 and a second member 34. The first surface of the groove 322 of the lower frame 3 consists of the indoor side portion of the first edge 330 of the first member 33. The second surface of the groove 322 consists of the second edge 341 of the second member 34. The bottom surface of the groove 322 is formed by the third edge 342 of the second member 34. The second edge 331 of the first member 33 is welded in contact with the back surface of the third edge 342 of the second member 34 that forms the bottom surface of the groove 322. The bottom portion of the groove 322 consists of an overlapping portion formed by welding the second edge 331 of the first member 33 and the third edge 342 of the second member 34 in an abutting state, and the third edge 332 of the first member 33 abuts against the underside of the portion of the first edge 340 of the second member 34 that is adjacent to the folded portion.

In the left diagram of Figure 9, when water pressure acts on the lower part of the door body, the water pressure acts so that the lower end of the indoor side surface 11 of the door body pushes in the contacted part 181 of the watertight member 18, and a force acts on the lower frame 3 to press the bottom surface of the groove 322 to which the base 180 of the watertight member 18 is fixed toward the indoor side. Furthermore, as the contacted part 181 of the watertight member 18 deforms in a crushing manner, a force acts on the lower end of the indoor side surface 11 of the door body to press the outdoor tip 344 of the folded-back part toward the indoor side.

As shown in the right diagram of Figure 9, in this embodiment, the bottom surface of the groove 322 is formed by the overlapping portion between the third edge 342 of the second member 34 and the second edge 331 of the first member 33, and the force in the direction of the arrow acts in a direction to tightly seal the third edge 342 of the second member 34 against the second edge 331 of the first member 33 (a direction perpendicular to the direction of peeling off the plug weld between the second edge 331 of the first member 33 and the third edge 342 of the second member 34).Furthermore, the force acting to move the second edge 331 of the first member 33 toward the indoor side is borne by the first edge 330 of the first member 33, which is integrally formed with the outdoor side portion of the second edge 331 of the first member 33. Furthermore, the third edge 332 of the first member 33 abuts against the underside of the portion of the first edge 340 of the second member 34 adjacent to the folded portion, and the first edge 330, second edge 331, and third edge 332 of the first member 33 and the first edge 340, second edge 341, and third edge 342 of the second member 34 cooperate to oppose the welded portion (connection portion) of the first member 33 and the second member 34, improving the water pressure resistance of the lower frame 3 formed by connecting the first member 33 and the second member 34. Note that while the water pressure resistant structure of the lower frame 3 has been described, those skilled in the art will understand that this water pressure resistant structure can also be applied to the left and right vertical frames and the upper frame.

[E] Reinforcement Structure of the Lower Frame As shown in Figure 13, the lower frame 3 includes an outdoor-side facing portion 30, an indoor-side facing portion 31, and a top surface 32. The top surface 32 includes a sloped outdoor side surface 320, a horizontal indoor side surface 321, and a groove 322 that opens to the outdoor side. In the illustrated embodiment, the lower frame 3, including the outdoor-side facing portion 30, the indoor-side facing portion 31, and the top surface 32 (including the groove 322) is obtained by connecting a first member 33 and a second member 34 that are bent into a predetermined shape. The height of the outdoor side surface 320 is lower than the height of the indoor side surface 321. The indoor-side portion of the outdoor side surface 320 and the outdoor-side portion of the indoor side surface 321 face each other in a stepped manner, and the groove 322 is formed between the indoor-side portion of the outdoor side surface 320 and the outdoor-side portion of the indoor side surface 321. A long watertight member (watertight rubber) 18 is attached to a groove 322 extending in the width direction of the building opening.

The first member 33 has a portion that forms the outdoor side surface portion 320 and the outdoor facing portion 30 of the upper surface portion 32 of the lower frame 3, and the second member 34 has a portion that forms the indoor side surface portion 321 and the indoor facing portion 31 of the upper surface portion 32 of the lower frame 3. The first member 33 consists of a first side 330 that extends at an upward angle from the outdoor side toward the indoor side, a second side 331 that rises vertically from the indoor side end of the first side 330, a third side 332 that extends horizontally from the upper end of the second side 331 toward the indoor side, a fourth side 333 that hangs down from the outdoor side end of the first side 330, a fifth side 334 that extends horizontally from the lower end of the fourth side 333 toward the indoor side, and a sixth side 335 that hangs down from the indoor side end of the fifth side 334. The first edge 330 of the first member 33 forms the outdoor side surface portion 320 of the upper surface portion 32 of the lower frame 3, and the fourth edge 333 of the first member 33 forms the outdoor facing portion 30 of the lower frame 3.

The second member 34 consists of a horizontally extending first side 340, a horizontal second side 341 that overlaps the inner surface of the outdoor portion of the first side 340 to form a folded portion, a third side 342 that hangs down from the indoor end of the second side 341, and a fourth side 343 that hangs down from the indoor end of the first side 340. The first side 340 of the second member 34 forms the indoor side portion 321 of the upper surface 32 of the lower frame 3, and the fourth side 343 of the second member 34 forms the indoor facing portion 31 of the lower frame 3. The folded portion formed by the outdoor portion of the first side 340 and the second side 341 is formed, for example, by hemming.

The groove 322 is formed from an upper portion (inner portion), a lower portion (outer portion), and a bottom portion. The upper portion of the groove 322 consists of the folded portion of the second member 34, with the second edge 341 of the second member 34 forming the inner surface of the upper portion. The lower portion of the groove 322 consists of the indoor-side portion of the first edge 330 of the first member 33. The bottom portion of the groove 322 consists of an overlapping portion formed by welding (plug welding) the second edge 331 of the first member 33 and the third edge 342 of the second member 34 in an abutting state. At the overlapping portion, the third edge 342 of the second member 34 is located on the outdoor side and forms the inner surface of the bottom portion, and the second edge 331 of the first member 33 is located on the indoor side and abuts against the back surface (indoor surface) of the third edge 342 of the second member 34. The third side 332 of the first member 33 abuts (or may be welded to) the underside of the portion of the first side 340 of the second member 34 adjacent to the folded portion.

A steel reinforcing member 36 is provided inside the lower frame 3. For example, the reinforcing member 36 is fixed to the lower frame 3 by welding, but the reinforcing member 36 may also be glued to the lower frame 3. The reinforcing member 36 consists of an outdoor facing portion 360, an indoor facing portion 361, an inclined outdoor side portion 362, a rising edge 363, a horizontal indoor side portion 364, and an outdoor lower edge 365. The outdoor facing portion 360 of the reinforcing member 36 abuts against the back surface of the outdoor facing portion 30 of the lower frame 3 (the fourth edge 333 of the first member 33), the indoor facing portion 361 of the reinforcing member 36 abuts against the back surface of the indoor facing portion 31 of the lower frame 3 (the fourth edge 343 of the second member 34), the outdoor side surface portion 362 of the reinforcing member 36 abuts against the back surface of the outdoor side surface portion 320 of the upper surface portion 32 of the lower frame 3 (the first edge 330 of the first member 33), the rising edge 363 of the reinforcing member 36 is located on the indoor side of the second edge 331 of the first member 33 of the lower frame 3 and faces away from it, and the indoor side surface portion 364 of the reinforcing member 36 abuts against the back surface (excluding the tip portion) of the indoor side surface portion 321 of the upper surface portion 32 of the lower frame 3 (the first edge 340 of the second member 34). In this embodiment, the reinforcing member 36 has approximately the same width as the lower frame 3, but multiple reinforcing members may be provided at intervals in the width direction.

The lower side of the lower frame 3 is provided with multiple band-shaped members (commonly known as band anchors) 38 extending in the indoor/outdoor direction. The band-shaped members 38 are connected to the main frame C via reinforcing bar anchors 39, thereby supporting the main frame C. More specifically, in this embodiment, the band-shaped members 38 have an L-shaped cross section, consisting of a horizontal edge 380 extending in the indoor/outdoor direction and a vertical edge 381 rising from the indoor end of the horizontal edge 380. The outdoor end portion of the horizontal edge 380 is fixed (welded) to the upper surface of the indoor end portion of the outdoor lower edge 365, and the upper end portion of the vertical edge 381 is fixed (welded) to the indoor-side facing portion 361 of the reinforcing member 36. The upper ends of reinforcing bar anchors 39 are fixed (welded) to the outdoor and indoor sides of the horizontal edge 380 of each band-shaped member 38, respectively, and the lower ends of the reinforcing bar anchors 39 are fixed to the main frame C.

As described above, in this embodiment, in the lower frame 3 formed by connecting the first member 33 and the second member 34, the first surface of the groove 322 of the lower frame 3 consists of the indoor side portion of the first edge 330 of the first member 33, the second surface of the groove 322 consists of the second edge 341 of the second member 34, the bottom surface of the groove 322 is formed by the third edge 342 of the second member 34, and the second edge 331 of the first member 33 is welded in abutting contact with the back surface of the third edge 342 of the second member 34 which forms the bottom surface of the groove 322, the bottom portion of the groove 322 consists of an overlapping portion formed by welding the second edge 331 of the first member 33 and the third edge 342 of the second member 34 in abutting contact, and further, the third edge 332 of the first member 33 abuts (or may be welded to) the underside of the portion adjacent to the folded-back portion of the first edge 340 of the second member 34. By adopting this structure, the water pressure resistance of the lower frame 3, which connects the first member 33 and the second member 34, is improved.

However, when water pressure acts on the outdoor side surface 10 of the door body 1 when the door body 1 is in the closed position, causing the lower end portion of the indoor side surface 11 of the door body 1 to press the watertight member 18 fitted into the groove 322 of the bottom frame 3 toward the indoor side, if even greater water pressure acts, the watertight member 18 will be compressed and the lower end portion of the indoor side surface 11 of the door body 1 will abut against the outdoor tip 344 of the folded portion formed by the outdoor portion of the first edge 340 and the second edge 341, applying a force that presses the folded portion toward the indoor side, which could result in the outdoor portion of the bottom frame 3 being deformed and raised, as shown schematically in Figure 15.

In this embodiment, a connecting member 37 that connects the outdoor side surface portion 320 of the upper surface portion 32 to the strip-shaped member 38 is provided inside the lower frame 3, thereby suppressing deformation of the lower frame 3. In this embodiment, the outdoor side surface portion 362 of the reinforcing member 36 is fixed to the back surface of the outdoor side surface portion 320, and therefore the connecting member 37 connects the outdoor side surface portion 362 of the reinforcing member 36 fixed to the back surface of the outdoor side surface portion 320 of the upper surface portion 32 to the strip-shaped member 38. The connecting member 37 consists of an upper portion 370 that is fixed (welded) to the outdoor side surface portion 362 of the reinforcing member 36, a lower portion 371 that is fixed (welded) to the strip-shaped member 38, and a rising portion 372 that connects the indoor end of the upper portion 37 to the outdoor end of the lower portion 371. The upper portion 70 of the connecting member 7 is located generally outside the outdoor end 344 of the folded portion formed by the outdoor portion of the first side 340 and the second side 341. In one embodiment, a connecting member 37 is provided corresponding to each strip-shaped member 38, but the connecting members 37 extending in the width direction of the lower frame 3 may also correspond to multiple strip-shaped members 38.

The shape of the connecting member 37 is not limited to that shown in Figure 13. For example, as shown in Figure 14, the connecting member 37 may have a generally U-shaped cross section, consisting of an upper portion 370, a lower portion 371, and a rising portion 372, with the upper portion 370 fixed (welded) to the outdoor side surface portion 362 of the reinforcing member 36, and the lower portion 371 fixed (welded) to the band-shaped member 38. For specific configurations and descriptions of the lower frame 3, reinforcing member 36, band-shaped member 38, and rebar anchors 39, reference may be made to Figure 13 and the descriptions associated with Figure 13. The entire upper portion 70 of the connecting member 37 is located outside of the outdoor tip 344 of the folded portion formed by the outdoor portion of the first side 340 and the second side 341.

[Note]
The lower frame of the door device includes a first surface portion to which the lower end of the door body faces when the opening is fully closed, a second surface portion located on the indoor side of the first surface portion, and a recessed groove formed between the indoor side portion of the first surface portion and the outdoor side portion of the second surface portion, opening to the outdoor side, and into which a watertight member is attached;
the lower frame includes a first member including the first surface portion and a second member including the second surface portion,
the first member includes a first side that forms the first surface portion and a second side that rises perpendicularly from an indoor side end of the first side,
the second member includes a horizontal first side that forms the second surface portion, a horizontal second side that overlaps with a lower surface of an outdoor-side portion of the first side to form a horizontal folded-back portion, and a third side that hangs down from an indoor-side end portion of the second side,
The groove includes a first surface on the lower side and a second surface on the upper side that face each other, and a bottom surface that is a vertical surface,
the first surface of the recessed groove is formed from an indoor side portion of the first side of the first member,
the second surface of the recessed groove is formed by the second side of the second member,
the bottom surface of the recessed groove is formed from the third side of the second member,
the second side of the first member is welded in a state in which it abuts against the back surface of the third side of the second member that forms the bottom surface of the recessed groove;
Water-resistant structure of door device.
In one aspect, the first member includes a third side extending horizontally from an end of the second side toward the indoor side,
The third side of the first member abuts against the lower surface of the first side of the second member at a portion adjacent to the folded-back portion.
In one aspect, a plurality of strip-shaped members extending in the indoor/outdoor direction are provided on the lower side of the lower frame,
The belt-shaped member is connected to the skeleton via a reinforcing bar anchor, so that the lower frame is supported by the skeleton;
A connecting member is provided inside the lower frame, the connecting member having an upper portion fixed to the first surface portion and a lower portion fixed to the belt-shaped member so as to connect the first surface portion and the belt-shaped member.
In one aspect, a plate-shaped reinforcing member is provided inside the lower frame so as to abut against the back surface of the lower frame,
a portion of the reinforcing member abuts against a rear surface of the first surface portion,
The upper portion of the connecting member is fixed to the portion of the reinforcing member.
In one aspect, at least a portion of the upper portion of the connecting member is located on the outdoor side of the outdoor-side tip of the second surface portion.

1 Door body 1A First door body 1B Second door body 11 Indoor side part 2 Upper frame (four-sided frame)
2' Upper frame (four-sided frame)
220′ Outdoor side part (first side part)
221' Indoor side part (second surface part)
222 groove 23 first member 230 first side 232 third side 233 fourth side (indoor side support side)
233' 4th side (indoor support side)
234 Fifth side 24 Second member 240 First side 241 Second side (folded portion of the second member)
242 Third side (folded portion of second member)
25 Third member 3 Lower frame (four-sided frame)
320 Outdoor side part (first side part)
321 Indoor side part (second surface part)
322: Groove 33: First member 330: First edge 331: Second edge (indoor side support edge)
331' Second side (indoor support side)
332 Third side 34 Second member 340 First side 341 Second side (folded portion of second member)
342 Third side (folded portion of second member)
344 Outdoor end of folded portion 36 Reinforcement member 37 Connecting member 370 Upper portion 371 Lower portion 38 Belt-shaped member 39 Reinforcement anchor 4 Door end side vertical frame (four-sided frame)
5. Vertical frame on the end of the door (all four sides)
C frame

Claims (5)

The lower frame of the door device is composed of a first member and a second member located on the indoor side of the first member , and has a recessed groove in which a watertight member is attached,
The first member includes a first side to which a lower end of the door body faces when the opening is fully closed, and a second side that rises vertically from an indoor side end of the first side,
The second member includes a horizontal first side located on the indoor side of the door body , a horizontal second side that overlaps with the underside of the outdoor side portion of the first side to form a horizontal folded portion, and a third side that hangs down from the indoor side end of the second side,
The groove includes a first surface on the lower side and a second surface on the upper side that face each other, and a bottom surface that is a vertical surface,
the first surface of the recessed groove is formed from an indoor side portion of the first side of the first member,
the second surface of the recessed groove is formed by the second side of the second member,
the bottom surface of the recessed groove is formed from the third side of the second member,
The second side of the first member is welded to the back surface of the third side of the second member that forms the bottom surface of the groove in a state where the second side is in contact with the back surface of the third side of the second member, and the third side of the second member that forms the bottom surface is supported from the indoor side by the second side of the first member welded to the back surface of the third side, and the second side of the first member faces the internal space of the lower frame.
Water-resistant structure of door device. the first member includes a third side extending horizontally from an end of the second side toward the indoor side,
the third side of the first member abuts against a lower surface of a portion of the first side of the second member that is adjacent to the folded-back portion;
The water pressure resistant structure of a door device according to claim 1 . The lower frame of the door device includes a first surface portion to which the lower end of the door body faces when the opening is fully closed, a second surface portion located on the indoor side of the first surface portion, and a recessed groove formed between the indoor side portion of the first surface portion and the outdoor side portion of the second surface portion, opening to the outdoor side, and into which a watertight member is attached;
the lower frame includes a first member including the first surface portion and a second member including the second surface portion,
the first member includes a first side that forms the first surface portion and a second side that rises perpendicularly from an indoor side end of the first side,
the second member includes a horizontal first side that forms the second surface portion, a horizontal second side that overlaps with a lower surface of an outdoor-side portion of the first side to form a horizontal folded-back portion, and a third side that hangs down from an indoor-side end portion of the second side,
The groove includes a first surface on the lower side and a second surface on the upper side that face each other, and a bottom surface that is a vertical surface,
the first surface of the recessed groove is formed from an indoor side portion of the first side of the first member,
the second surface of the recessed groove is formed by the second side of the second member,
the bottom surface of the recessed groove is formed from the third side of the second member,
the second side of the first member is welded to a back surface of the third side of the second member that forms a bottom surface of the recessed groove in a state of abutting against the back surface of the third side of the second member,
A plurality of strip-shaped members extending in the indoor/outdoor direction are provided on the lower side of the lower frame,
The belt-shaped member is connected to the skeleton via a reinforcing bar anchor, so that the lower frame is supported by the skeleton;
A connecting member is provided inside the lower frame, the connecting member having an upper portion fixed to the first surface portion and a lower portion fixed to the belt-shaped member so as to connect the first surface portion and the belt-shaped member.
Water-resistant structure of door device. A plate-shaped reinforcing member is provided inside the lower frame so as to abut against the rear surface of the lower frame,
a portion of the reinforcing member abuts against a rear surface of the first surface portion,
the upper portion of the connecting member is fixed to the portion of the reinforcing member;
The water pressure resistant structure of a door device according to claim 3 . At least a portion of the upper portion of the connecting member is located on the outdoor side relative to the outdoor-side tip of the second surface portion.
The water pressure resistant structure of the door device according to claim 3 or 4.