Fitting

Abstract

To provide a fitting which has high versatility.SOLUTION: A fitting includes: a frame body for forming an opening; and a door body rotatably mounted on the frame body, and capable of opening / closing the opening. The door body includes: an indoor surface and an outdoor surface; and a side flat surface connected with the indoor surface and the outdoor surface and for forming the outer periphery of the door body. A hinge can be mounted between the frame body and the side flat surface, or a pivot hinge can be mounted between the frame body and the door body. . A rotary shaft of the pivot hinge can be arranged at a position which is between the indoor surface and the outdoor surface, and where a distance from the rotary shaft to a surface of the frame body opposing the side flat surface is longer than a distance from the rotary shaft to a corner part between the outdoor surface and the side flat surface, and a distance from the rotary shaft to a portion of the frame body opposing the indoor surface of the door body is longer than a distance from the rotary shaft to a corner part between the indoor surface and the side flat surface.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a fitting having a door body that is rotatably attached to a frame body. [Background technology]

[0002] Conventionally, fittings having a door (door body) that is rotatably attached to a frame have been known (see, for example, Patent Document 1). This fitting is rotatably supported by a pivot hinge that has a pivot shaft that forms the center of rotation on the inside of the door body. Also, the door tail (hanging point) side of the door body is connected so that the corner between the interior surface and the door tail end face is inclined diagonally so that the door body does not come into contact with the frame when it rotates, and the thickness of the door body becomes thinner towards the end of the door tail. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-25214 A Summary of the Invention [Problem to be solved by the invention]

[0004] Door bodies that are rotatably supported by pivot hinges, such as the conventional door body described above, have an inclined surface on the door end side, or the end on the door end side is formed as a curved surface, so the end face on the door end side is narrow or curved, making it impossible to attach a hinge. For this reason, different door bodies must be used when attaching with a hinge and when attaching with a pivot hinge, which poses a problem of low versatility. The present invention has been made in view of the above problems, and its object is to provide a highly versatile fitting. [Means for solving the problem]

[0005] The main invention for achieving this object is a fitting having a frame body that forms an opening, and a door body that is rotatably attached to the frame body and can open and close the opening, wherein the door body has an interior surface and an exterior surface, and side planes that are connected to the interior surface and the exterior surface and form the outer periphery of the door body, a hinge can be attached between the frame body and the side planes, or a pivot hinge can be attached between the frame body and the door body, and the rotation axis of the pivot hinge is between the interior surface and the exterior surface, and can be positioned at a position where the distance between the opposing surface of the frame body that faces the side planes is longer than the distance between the exterior surface and the corner of the side planes, and the distance between the part of the frame body that faces the interior surface of the door body is longer than the distance between the interior surface and the corner of the side planes. Other features of the present invention will become apparent from the description of this specification and the accompanying drawings. [Effects of the Invention]

[0006] According to the present invention, it is possible to provide highly versatile fittings. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is an interior view of the fitting according to the present embodiment. [Figure 2] FIG. 2 is a vertical cross-sectional view of the door body according to the embodiment. [Figure 3] FIG. 2 is a vertical cross-sectional view of the fitting according to the present embodiment. [Figure 4] FIG. 2 is a cross-sectional view of the fitting according to the present embodiment. [Figure 5] FIG. 10 is a diagram showing how the door body rotates. [Figure 6] This is a cross-sectional view showing a fitting whose frame body is equipped with an airtight material. [Figure 7] This is a vertical cross-sectional view showing a fixture to which a door body is attached via a pivot hinge whose rotation axis is located on the outside of the room. [Figure 8] This is a cross-sectional view showing a fixture to which a door body is attached via a pivot hinge whose rotation axis is located on the outside of the room. [Figure 9]FIG. 9(a) is a perspective view showing the upper pivot hinge, and FIG. 9(b) is a perspective view showing the lower pivot hinge. [Figure 10] FIG. 1 is a cross-sectional view showing a fixture to which a door body is attached via a hinge. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, a fitting according to one embodiment of the present invention will be described with reference to the drawings.

[0009] As an example of the fitting 1 according to this embodiment, a fitting installed at an entrance to a fireproof warehouse or the like will be described as an example, as shown in Figure 1. The fitting 1 of this embodiment has a frame body 2 that is attached to a building to form an opening 2a that serves as an entrance, and a door body 3 that is supported by the frame body 2, and the door body 3 is rotatably attached to the frame body 2 via a pivot hinge 4 so that it opens to the outside of the room.

[0010] The frame body 2 is formed by a rectangular framework of four frame members 20. The four frame members 20 have similar cross-sectional shapes. Each frame member 20 has an exterior sight board portion 20a with a sight surface facing the outside of the room at its exterior end, an interior sight board portion 20b with a sight surface facing the inside of the room at its interior end, an exterior sight board portion 20c with a sight surface connecting to the end of the exterior sight board portion 20a and extending toward the inside of the room, an interior sight board portion 20d with a sight surface connecting to the end of the interior sight board portion 20b and extending toward the outside of the room, and a central sight board portion 20e forming a sight surface connecting the exterior sight board portion 20c and the interior sight board portion 20d.

[0011] The indoor projection board portion 20d of each frame material 20 is located more inward than the outdoor projection board portion 20c when framed, and the outdoor end of the indoor projection board portion 20d and the indoor end of the outdoor projection board portion 20c are connected by an intermediate projection board portion 20e having a projection surface facing outside. Therefore, the frame body 2 has an indoor opening 2c formed on the indoor side by the indoor projection board portion 20d of each frame material 20, which is smaller than the outdoor opening 2b formed by the outdoor projection board portion 20c of each frame material 20.

[0012] The door body 3 is placed at the outdoor opening 2b, with the outer periphery of the indoor surface facing the entire periphery of the middle sight board 20e of each frame material 20, and the indoor surface 3b on the door tip side abuts against the door stop member 21 provided on the central sight board 20e of the frame body 2 to close the opening 2a of the indoor opening 2c. When the door body 3 is closed, the outdoor sight board 20c facing the side plane 3c of the door body 3 corresponds to the opposing surface of the frame body 2.

[0013] In the closed state, the door body 3 has an exterior surface material 30 made of steel plate facing the outside, an interior surface material 31 made of steel plate facing the inside of the room, an upper rib 32 located at the upper end between the exterior surface material 30 and the interior surface material 31, a lower rib 33 located at the lower end, a door-end vertical rib 34 located at the end on the door end side, and a hanging-end vertical rib 35 located at the end on the hanging end side. Also, on the door end side, there is provided a latch mechanism (not shown) for maintaining and releasing the closed state of the door body 3, and a handle 36 (Fig. 1) that serves as an operating part for the latch mechanism and is used to open and close the door body 3, but their explanation will be omitted here.

[0014] The exterior surface material 30 and the interior surface material 31 face each other with a gap in the projection direction, and each have an exterior surface portion 30a that is a substantially rectangular flat surface and forms the exterior surface 3a, or an interior surface portion 31a that forms the interior surface 3b. The top ends and left and right ends of the exterior surface portion 30a and the interior surface portion 31a are provided with exterior side surfaces 30b and interior side surfaces 31b that are bent toward the opposite sides.

[0015] The upper ribs 32, lower ribs 33, door-end side vertical ribs 34, and hanging side vertical ribs 35 all have a U-shaped cross section, and each has exterior plate portions 32a, 33a, 34a, 35a that abut the exterior surface material 30, interior plate portions 32b, 33b, 34b, 35b that abut the interior surface material 31, and connecting plate portions 32c, 33c, 34c, 35c that connect the exterior plate portions 32a, 33a, 34a, 35a to the interior plate portions 32b, 33b, 34b, 35b.

[0016] Since the components that make up the pivot hinge 4 are arranged at the upper and lower ends of the door body 3 on the hanging side, the hanging side vertical rib 35 is arranged between the components of the pivot hinge 4 that are arranged above and below, the upper rib 32 and the lower rib 33 are aligned horizontally with the components of the pivot hinge 4 and are arranged up to the end of the door edge side, and the door edge side vertical rib 34 is arranged over the entire length between the upper rib 32 and the lower rib 33.

[0017] The upper ribs 32, the end-side vertical ribs 34, and the hanging-side vertical ribs 35 are arranged so that the connecting plates 32c, 34c, and 35c are located on the outer periphery of the door body 3, and the lower ribs 33 are arranged so that the connecting plate 33c is located on top. The upper ribs 32, the end-side vertical ribs 34, and the hanging-side vertical ribs 35 are fixed to the exterior side surface 30b and the interior side surface 31b by abutting the connecting plates 32c, 34c, and 35c, respectively. In other words, the hanging-side side surface 3c of the door body 3 is formed by abutting the exterior side surface 30b and the interior side surface 31b against the connecting plate 35c of the hanging-side vertical ribs 35.

[0018] The lower rib 33 is fixed to the exterior side surface portion 30b and the interior side surface portion 31b by aligning the edges of the exterior plate portion 33a and the interior plate portion 33b opposite the connecting plate portion 33c with the lower edges of the exterior surface portion 30a and the interior surface portion 31a.

[0019] The pivot hinge 4 has an upper hinge 40 provided at the upper end of the door body 3 on the hanging side, a lower bearing 41 provided at the lower end of the door body 3 on the hanging side, an upper bearing 42 provided on the exterior sight board portion 20a of the upper frame member 20, and a second rotating shaft 43 provided on the exterior sight board portion 20a of the lower frame member 20. Here, the upper hinge 40 and the lower bearing 41 are components of the pivot hinge 4 described above that are provided on the door body 3.

[0020] The upper hinge 40 has a holder 44 fixed to the door body 3 and a first pivot shaft 45 rotatably held by the holder 44. The holder 44 is substantially rectangular parallelepiped-shaped, and its top surface 44a is positioned and fixed near the top end of the door body 3. The holder 44 has an insertion hole (not shown) that penetrates in the vertical direction and through which the first pivot shaft 45 is inserted. The first pivot shaft 45 inserted in the insertion hole is movable in the vertical direction by an elastic material (not shown), such as a spring, provided in the holder 44, and is configured so that its upper end can be recessed below the top surface 44a. Furthermore, by operating from outside the door body 3, the upper end of the first pivot shaft 45 can be set to protrude above the door body 3, preventing it from moving in the vertical direction.

[0021] The lower bearing 41 is substantially rectangular parallelepiped-shaped, and its lower surface 41a is positioned and fixed near the lower end of the door body 3. The lower bearing 41 has a lower bearing recess 41b recessed upward and into which the shaft portion 43a of the second rotating shaft 43 is inserted. The lower bearing recess 41b is circular and slightly larger in diameter than the shaft portion 43a.

[0022] When the upper bearing 42 is attached to the exterior sight plate 20a, it has an upper bearing recess 41b recessed upward and into which the first rotating shaft 45 is inserted. The upper bearing recess 41b has a circular shape that is slightly larger than the diameter of the first rotating shaft 45.

[0023] The second pivot shaft 43 has a generally cylindrical base 43b and a generally cylindrical shaft 43a with a smaller diameter than the base 43b and a truncated cone-shaped upper end. The first pivot shaft 45, the center of the lower bearing recess 41b, the center of the upper bearing recess 42a, and the shaft 43a are all positioned on the same vertical line S when the door body 3 is attached to the frame 2 via the pivot hinge 4. As shown in Figure 4, the vertical line S, i.e., the pivot axis O, is located between the exterior surface material 30 and the interior surface material 31, at the corner on the hanging side of the door body 3 and on the exterior side.

[0024] More specifically, as shown in Figures 4 and 5, when the door body 3 is closed, the distance L1 between the pivot axis O indicated by the vertical line S and the outdoor visibility board portion 20c of the vertical frame member 20 that the side plane 3c of the hanging side of the door body 3 faces is longer than the distance L2 between the pivot axis O and the corner C1 formed by the outdoor surface 3a and the outdoor side surface portion 30b of the hanging side that forms the side plane 3c, and the distance L3 between the pivot axis O and the central visibility board portion 20e that faces the vertical frame member 20 that faces the indoor side 3b of the door body 3 on the hanging side is longer than the distance L4 between the pivot axis O and the corner C2 formed by the indoor surface portion 31a and the indoor side surface portion 31b of the hanging side.

[0025] In the above embodiment, an example was described in which the door body 3 is closed with the interior surface 3b on the door tip side of the door body 3 abutting the door stop member 21 provided on the frame body 2, but for example, as shown in Figure 5, the door body 3 may be closed with the outer periphery of the interior surface of the door body 3 abutting against the airtight material 22 provided around the entire periphery of the intermediate sight plate portion 20e of each frame material 20.

[0026] The airtight material 22 is made of an elastically deformable synthetic resin, and is pressed and compressed in the projection direction with the door body 3 in contact therewith, thereby elastically deforming. At this time, the airtight material 22 has a portion on the exterior projection panel 20c side of the frame 2 that does not face the door body 3 in the projection direction and does not abut against it. Therefore, even if the corner C2 of the interior surface 31a and the side flat surface 3c (indoor side surface 31b) of the door body 3 moves toward the interior when the door body 3 is opened, compressing the airtight material 22, the airtight material 22 can deform while escaping between the door body 3 and the exterior projection panel 20c. Therefore, the load when the airtight material 22 is compressed is small, allowing the door body 3 to be rotated easily.

[0027] In the above embodiment, an example was described in which the door body 3 is rotatably attached to the frame body 2 via the pivot hinge 4 whose rotation axis O is arranged between the outdoor surface material 30 and the indoor surface material 31, but it is also possible to rotatably attach the door body 3 to the frame body 2 via pivot hinges 5, 6 and hinge 7 whose rotation axis O is arranged outside the outdoor surface material 30.

[0028] As for the pivot hinges 5, 6, whose rotation axis O is located outside the exterior surface material 30, the pivot hinge 5 is attached to the upper side of the door body 3, and the pivot hinge 6 is attached to the lower side of the door body 3, as shown in Figures 7 and 8. The upper pivot hinge (hereinafter referred to as the upper pivot hinge) 5 has an upper hinge member 50 and a lower hinge member 51 that are stacked vertically and form a pair, as shown in Figure 9(a). The upper pivot hinge 5 has an upper fixing part 50a or a lower fixing part 51a that is arranged and fixed along the in-plane direction of the door body 3, and an upper protruding part 50b or a lower protruding part 51b that is provided to protrude out-of-plane from the upper fixing part 50a or the lower fixing part 51a when the door body 3 is closed.

[0029] The upper hinge member 50 and the lower hinge member 51 are rotatably connected by a rotation axis O provided on the upper protrusion 50b and the lower protrusion 51b. The upper pivot hinge 5 has an upper fixing portion 50a fixed to the exterior projection panel portion 20c of the upper frame member 20, and a lower fixing portion 51a fixed to the upper rib 32 of the door body 3.

[0030] The pivot hinge 6 (hereinafter referred to as the lower pivot hinge) attached to the lower side of the door body 3 has a frame side hinge member 60 fixed to the lower frame material 20 and a door body side hinge member 61 fixed to the door body 3, as shown in Figure 9(b).

[0031] The frame-side hinge member 60 has a frame fixing portion 60a fixed to the exterior projection panel portion 20c of the frame material 20 on the hanging side, and an exterior protruding portion 60b protruding from the frame fixing portion 60a to the exterior side. The door body-side hinge member 61 has a door body fixing portion 61a fixed to the lower rib 33 of the door body 3, and a door body-side extending portion 61b arranged above and below the exterior protruding portion 60b extending from the door body fixing portion 61a and provided facing each other. The frame-side hinge member 60 and the door body-side hinge member 61 are rotatably connected by a rotation axis O provided on the exterior protruding portion 60b and the door body-side extending portion 61b.

[0032] Furthermore, when the door body 3 is attached so as to be freely rotatable via the hinge 7, as shown in Figure 10, the rotation axis O is positioned outside the door body 3 between the side plane 3c on the hanging side of the door body 3 and the outdoor projection panel portion 20c of the vertical frame material 20 located on the hanging side.

[0033] The hinge 7 is composed of an upper plate member 7a and a lower plate member 7b, each having a vertical plate surface, arranged one above the other, and one horizontal end of the upper plate member 7a and the lower plate member 7b is each rotatable about a rotation axis O. The upper plate member 7a of the hinge 7 faces and abuts against the exterior side surface portion 30b of the exterior surface member 30 and the interior side surface portion 31b of the interior surface member 31, which form the side plane 3c on the hanging side of the door body 3, and is fixed to the hanging side vertical frame 35, and the lower plate member 7b is fixed to the exterior visible plate portion 20c of the frame material 20.

[0034] According to the fitting 1 of this embodiment, the door body 3 has a side surface 3c forming the outer periphery, and the hanging-side vertical rib 35, which has sufficient strength, is located on the side surface 3c, so the door body 3 can be attached between the frame body 2 and the side surface 3c on the hanging side via a hinge 7, and the door body 3 can also be attached between the frame body 2 and the side surface 3c on the outer periphery of the door body 3 via pivot hinges 4, 5, and 6. In other words, the door body 3 can be rotatably attached to the frame body 2 either by the hinge 7 or by the pivot hinges 4, 5, and 6, and the same door body 3 can be used regardless of which hinge 4, 5, 6, and 7 is used. This makes it possible to provide a fitting 1 with excellent versatility.

[0035] Furthermore, the pivot axis O of the pivot hinge 4 is located between the indoor surface material 31 and the outdoor surface material 30, and the distance L1 between the side surface 3c and the outdoor projection panel 20c of the frame 2 facing the frame surface 3c is longer than the distance L2 between the corner C1 where the outdoor surface material 30 and the side surface 3c, and the distance L3 between the frame surface 2 and the part of the door body 3 facing the indoor surface material 31 is longer than the distance L4 between the corner C2 where the indoor surface material 31 and the side surface 3c. Therefore, when the door body 3 is rotated to open, the movement trajectory of the door body 3 about the pivot axis O can be made smaller. Therefore, by using the pivot hinge 4 whose pivot axis O is located between the indoor surface material 31 and the outdoor surface material 30, the distance between the door body 3 and the frame 2 can be made closer than when the door body 3 is supported by pivot hinges 5, 6 whose pivot axis O is located outside the outdoor surface material 30, for example. Therefore, by narrowing the width of the door body 3 and also narrowing the gap between the door body 3 and the frame body 2, it is possible to narrow the width of the entire fitting 1.

[0036] Furthermore, since the rotation axis O of the pivot hinge 4 is biased toward the exterior side between the interior surface material 31 and the exterior surface material 30, the distance between the corner C1 where the exterior surface material 30 and the side flat surface 3c are formed can be made shorter than when the rotation axis O is biased toward the interior side. This reduces the amount by which the corner C1 where the exterior surface material 30 and the side flat surface 3c move toward the exterior projection panel 20c when the door body 3 is rotated, making it possible to further narrow the distance between the side flat surface 3c and the exterior projection panel 20c.

[0037] The above-described embodiments are provided to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof. The present embodiment includes at least the following inventions. (Aspect 1) A fitting having a frame body that forms an opening, and a door body that is rotatably attached to the frame body to open and close the opening, wherein the door body has an interior surface and an exterior surface, and a side surface that is connected to the interior surface and the exterior surface and forms the outer periphery of the door body, a hinge can be attached between the frame body and the side surface, or a pivot hinge can be attached between the frame body and the door body, the rotation axis of the pivot hinge is between the interior surface and the exterior surface, the distance between the side surface and the opposing surface of the frame body that faces the side surface is longer than the distance between the corner of the exterior surface and the side surface, and A fixture characterized in that the distance between the frame body and the part of the door body facing the interior surface is longer than the distance between the corner of the interior surface and the side plane.

[0038] According to the fitting of Aspect 1, the door body has a side surface that forms the outer periphery, so it is possible to attach the door body between the frame body and the side surface on the hanging side via a hinge, or it is also possible to attach the door body between the frame body and the side surface of the outer periphery of the door body via a pivot hinge. In other words, the door body can be rotatably attached to the frame body either by a hinge or a pivot hinge, and the same door body can be used regardless of which hinge is used. This makes it possible to provide a fitting with excellent versatility.

[0039] Furthermore, the pivot axis of the pivot hinge is located between the indoor and outdoor surfaces, and the distance between the side plane and the opposing surface of the frame body is longer than the distance between the corner between the outdoor surface and the side plane, and the distance between the part of the frame body that faces the indoor surface of the door body is longer than the distance between the corner between the indoor surface and the side plane, so it is possible to reduce the movement trajectory of the door body around the pivot axis when it is rotated to open. Therefore, by using a pivot hinge with a pivot axis located between the indoor and outdoor surfaces, it is possible to make the distance between the door body and the frame body closer than, for example, when the door body is supported by a pivot hinge with a pivot axis located outside the outdoor surface.

[0040] (Aspect 2) A fixture as described in aspect 2, comprising an aggregate having an exterior panel portion joined to the exterior surface, an interior panel portion joined to the interior surface, and a connecting plate portion connecting the exterior panel portion and the interior panel portion, characterized in that the hinge is fixed to the connecting plate portion at the portion that abuts against the side plane.

[0041] According to the fixture of aspect 2, the part of the hinge that abuts against the side plane is fixed to the outer surface of the connecting plate part of the frame, so it has sufficient strength and can support the door body by attaching the hinge.

[0042] (Aspect 3) The fitting according to aspect 1 or aspect 2 is characterized in that the pivot axis is positioned between the interior surface and the exterior surface at a position biased toward the exterior side of the room.

[0043] According to the fitting of Aspect 3, the rotation axis of the pivot hinge is biased toward the outside of the room between the indoor and outdoor surfaces, so the distance between the corner of the outdoor surface and the side plane can be made shorter than when the rotation axis is biased toward the indoor surface. This reduces the amount of movement of the corner of the outdoor surface and the side plane toward the opposite surface when the door body rotates, making it possible to narrow the distance between the side plane and the opposite surface.

[0044] (Aspect 4) A fixture according to any one of aspects 1 to 3, characterized in that the frame body has an airtight material that is abutted and compressed by the interior surface when the door body is closed, and the airtight material has a portion on the opposing surface that does not abut the interior surface.

[0045] According to the fitting of the fourth aspect, the airtight material that is provided in the frame and that is compressed when the door body is closed by contacting the interior surface has a portion on the opposite surface that does not contact the interior surface, so when it is compressed by the rotating door body, it can deform while escaping to the opposite surface. This reduces the load on the airtight material when it is compressed, making it possible to rotate the door body easily. [Explanation of symbols]

[0046] 1 Fittings, 2 Frame, 2a opening, 2a outdoor opening, 2b indoor opening, 3 Door body, 3a Exterior surface, 3b Interior surface, 3c Side plane, 4 Pivot hinge, 5 upper pivot hinge, 6 lower pivot hinge, 7 hinge, 20c outdoor panel portion (opposite surface), 22 airtight material, 32 upper frame, 32a outdoor panel portion, 32b Indoor plate part, 32c Connecting plate part, 33 Lower bone, 33a Outdoor plate part, 33b Indoor board part, 33c Connecting board part, 34 Door end vertical frame, 34a Outdoor board part, 34b Indoor board part, 34c Connecting board part, 35 Hanging side vertical frame, 35a Outdoor board part, 35b Indoor board part 35c Connecting board part, C1 Corner between the exterior surface material and the side plane, C2 Corner between the interior surface material and the side plane, L1: Distance between the rotation axis and the outdoor projection panel L2: Distance between the pivot axis and the corner outside the room L3: Distance between the rotation axis and the central sight plate L4: Distance between the pivot axis and the corner on the indoor side O Rotational axis

Claims

1. a frame body that forms an opening; A door body rotatably attached to the frame body and capable of opening and closing the opening, The door body has an interior surface, an exterior surface, and a side plane that is connected to the interior surface and the exterior surface and forms the outer periphery of the door body, A hinge can be attached between the frame body and the side plane, or a pivot hinge can be attached between the frame body and the door body, The rotation axis of the pivot hinge is Between the indoor surface and the outdoor surface, The distance between the side plane and the opposing surface of the frame body is longer than the distance between the outdoor surface and the corner of the side plane, and A fixture characterized in that the distance between the frame body and the part of the door body facing the interior surface is longer than the distance between the corner of the interior surface and the side plane.

2. The fitting according to claim 1, an exterior plate portion joined to the exterior surface; An indoor plate portion joined to the indoor surface; and The structure includes an aggregate having a connecting plate portion that connects the exterior plate portion and the interior plate portion, The hinge is characterized in that the portion that abuts against the side plane is fixed to the connecting plate portion.

3. The fitting according to claim 1 or claim 2, The pivot axis is positioned between the interior surface and the exterior surface, biased toward the exterior side of the room.

4. The fitting according to claim 1 or claim 2, The frame body has an airtight material that is abutted against and compressed by the indoor surface when the door body is closed, The airtight material has a portion on the opposing surface that does not abut against the interior wall of the room.

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