Door frame structure

Abstract

To provide a knockdown door frame structure with good workability.SOLUTION: A depth part of a vertical frame 3 is configured to include a second member 6 (first doorstop part) extending in the height direction, an upper flat part 30 and a lower flat part 31 located on the upper and lower sides of the second member 6; the depth part of an upper frame 2 includes an indoor lower surface 23 (second doorstop part) extending along the entire length of the upper frame 2; the longitudinal end edge 2A of the upper frame 2 is in contact with the upper flat part 30 of the vertical frame; and the vertical frame 3 and the upper frame 2 are fixed with a screw S with a top edge 6A of the second member 6 (doorstop portion) of the vertical frame 3 being in contact with the indoor lower surface 23 (depth surface of the second doorstop part) of the upper frame 2.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a door frame structure.

Background Art

[0002] Conventionally, a door frame assembled in a four-sided shape at a factory has been carried into a site and attached to a building frame. However, there is also a demand for a knock-down frame in which the upper frame, lower frame, and vertical frames are carried into the site and the door frame is assembled at the site. When assembling a door frame at the site, a door frame structure assembled using screws instead of welding is known (Patent Document 1).

[0003] In this case, with the horizontal frames (upper frame, lower frame) and the vertical frames abutted, they are fixed with screws. However, since it is necessary to abut a doorstop portion provided with a groove for attaching an airtight material, in the door frame structure according to the original design, a step has formed at the abutting portion (see FIGS. 12 to 15). The knock-down type door frame structure according to the original design will be described in detail as a comparative example at the end of this specification.

[0004] Also, when the horizontal frames and the vertical frames are abutted and fixed with screws, there is a possibility of a gap occurring. Therefore, when it is desired to ensure higher watertightness, a watertight material is pasted on the abutting portion. However, pasting a watertight material on an abutting portion provided with a step has poor workability, and it has been difficult to effectively provide a watertight material.

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a knock-down type door frame structure with good workability.

Means for Solving the Problems

[0006] The technical means adopted by the present invention is In a door frame structure comprising a first frame member extending in a first direction and a second frame member extending in a second direction connected by screws, The projection portion of the first frame material consists of a first door stop portion extending in a first direction and flat portions located on both sides of the first door stop portion. The projection portion of the second frame member is provided with a second door stop portion that extends in a second direction along the entire length of the second frame member. The first frame member and the second frame member are fixed together with screws, with the longitudinal edge of the second frame member in contact with the flat portion of the first frame member, and the longitudinal edge of the first door stop portion of the first frame member in contact with the depth surface of the second door stop portion of the second frame member. It is a door frame structure. In one embodiment, the first frame member and the second frame member are made of steel and are obtained by bending steel plates. In one configuration, the first frame member is a vertical frame, and the second frame member is a horizontal frame (upper or lower frame).

[0007] In one embodiment, a watertight material is provided on the flat portion of the first frame material, and the longitudinal edge of the second frame material is in contact with the flat portion via the watertight material.

[0008] In one embodiment, a watertight material is provided at the end region of the depth surface of the second door stop portion of the second frame material, and the longitudinal edge of the first door stop portion of the first frame material is in contact with the watertight material.

[0009] In one embodiment, the first frame member comprises a first member extending along the entire length of the first frame member and a second member shorter than the first member and fixed to the front surface of the first member. The second member forms the first door stop portion, and the portion of the first member's facing surface forms the flat portion. In one embodiment, the entire surface of the first member is flat. In one embodiment, the second member is detachably fixed to the first member. In the embodiment described later, only the vertical frame is composed of a first member and a second member (door stopper), but the upper frame and lower frame may also be composed of a first member and a second member (door stopper).

[0010] In one embodiment, the longitudinal edge of the second frame member is located on a plane, and this plane abuts against the flat portion of the depth of the first frame member. In one embodiment, a fixing piece is positioned at the longitudinal edge of the second frame member, The flat portion of the first frame material is fixed to the fixing piece by the screw. [Effects of the Invention]

[0011] In the door frame structure according to the present invention, the longitudinal edge of the second frame material abuts against the flat portion of the first frame material, and the longitudinal edge of the first door stop portion of the first frame material abuts against the depth surface of the second door stop portion of the second frame material, and the first frame material and the second frame material are fixed together with screws. As a result, no step is formed at the abutment portion between the first and second members, and a watertight material can be easily attached to the abutment portion. [Brief explanation of the drawing]

[0012] [Figure 1] This is a front view of the door device (door body in the closed position) according to this embodiment. [Figure 2] This is a front view of the door frame according to this embodiment. [Figure 3] This is a magnified view of a portion of Figure 2. [Figure 4] This is a longitudinal cross-sectional view of Figure 2. [Figure 5] This is a cross-sectional view of Figure 2. [Figure 6] This figure shows the upper frame according to this embodiment, where (A) is a front view, (B) is a side view, and (C) is a bottom view. [Figure 7] This figure shows the lower frame according to this embodiment, where (A) is a plan view, (B) is a side view, and (C) is a front view. [Figure 8]It is a figure showing a vertical frame according to this embodiment, (A) is a plan view, (B) is a front view, and (C) is a side view. [Figure 9] It is a figure showing a first member of the vertical frame according to this embodiment, (A) is a plan view, (B) is a front view, and (C) is a side view. [Figure 10] It is a figure showing a second member of the vertical frame according to this embodiment, (A) is a plan view, (B) is a front view, and (C) is a side view. [Figure 11] It is a figure showing another fixing structure of the first member and the second member of the vertical frame according to this embodiment, (A) is a plan view, (B) is a front view of the lower part, and (C) is a side view of the lower part. [Figure 12] It is a partial view of the front view of the door frame according to the comparative example. [Figure 13] It is a figure showing an upper part of the vertical frame of the door frame according to the comparative example. [Figure 14] It is a perspective view of an upper part of the vertical frame of the door frame according to the comparative example. [Figure 15] It is a figure showing a lengthwise end part of the upper frame of the door frame according to the comparative example.

Mode for Carrying Out the Invention

[0013] [A] Overall Configuration of Door Device Embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a front view of a door device attached to a building opening. In the door device, a space surrounded by a four-sided door frame 1 serves as the opening, and the opening is opened and closed by a door body D rotatably attached to the door frame 1 by a hinge H. The door device in the illustrated aspect is a hinged door, but the type of the door is not limited. <## <##

[0014] <## The door frame 1 according to this embodiment is a knockdown frame made of steel, and is a four-sided frame assembled on site from an upper frame 2, left and right vertical frames 3, and a lower frame 4. The ends of the upper frame 2 in the longitudinal direction, the upper ends of the left and right vertical frames 3, the ends of the lower frame 4 in the longitudinal direction, and the lower ends of the left and right vertical frames 3 are connected by screws S. The material of the door frame 1 is not limited to steel, but may be a metal such as stainless steel or aluminum. As shown in Figure 2, the upper and lower ends of the vertical frames 3 according to this embodiment reach the upper and lower ends of the door frame 1, and the edges 2A on both sides in the longitudinal direction of the upper frame 2 abut against the depth of the vertical frames 3, and the edges 4A on both sides in the longitudinal direction of the lower frame 4 abut against the depth of the vertical frames 3, and are fixed with screws S.

[0015] [B] Composition of each frame of the door frame [B-1] Upper frame configuration The upper frame 2 is a long steel member extending in the opening width direction (width direction of the opening), and is obtained by bending a steel plate into a predetermined shape. As shown in Figure 6, the upper frame 2 comprises an outdoor-side facing surface 20, an indoor-side facing surface 21, and a projection portion (bottom surface portion) extending in the projection direction between the lower end of the outdoor-side facing surface 20 and the lower end of the indoor-side facing surface 21, with the lower end of the indoor-side facing surface 21 located below the lower end of the outdoor-side facing surface 20.

[0016] The visible portion includes an outdoor lower surface 22 extending horizontally inward from the lower end of the outdoor visible surface 20, and an indoor lower surface 23 extending horizontally inward from the lower end of the indoor visible surface 21. A projection 230 is integrally formed on the outdoor portion of the indoor lower surface 23, which is located on the outdoor side of the indoor end of the outdoor lower surface 22. The projection 230 faces the indoor portion of the outdoor lower surface 22, and an intermediate visible surface 220 is formed which extends downward from the indoor end of the outdoor lower surface 22 and connects to the base end of the projection 230.

[0017] A groove extending in the direction of the opening width is formed from the indoor portion of the outdoor lower surface 22, the outdoor portion of the indoor lower surface 23 (i.e., the projection 230), and the intermediate visible surface 220, with the indoor portion of the outdoor lower surface 22, the projection 230, and the intermediate visible surface 220 being the upper, lower, and bottom surfaces of the groove, respectively. An airtight rubber (which also functions as a watertight rubber or a cushioning member) is fitted into the groove over its entire width, and the door body D comes into contact with the airtight rubber when in the closed position. In the upper frame 2, the portion that forms the groove in which the airtight rubber is fitted and the indoor lower surface 23 with the projection 230 integrally formed at its tip are referred to as the door stop portion. The door stop portion in the upper frame 2 extends over the entire length of the upper frame 2.

[0018] In the upper frame 2, an outdoor upper surface 24 is formed that extends horizontally inward from the upper end of the outdoor facing surface 20, and an outdoor vertical side 240 is formed that rises vertically from the indoor end of the outdoor upper surface 24. An upper horizontal side 210 is formed at the upper end of the indoor facing surface 21, extending horizontally inward. A reinforcing piece 25 is fixed to the upper frame 2 at an intermediate point in its longitudinal direction, connecting the outdoor upper surface 24 and the indoor facing surface 21. The longitudinal edge 2A of the upper frame 2 lies on the same plane, except for the longitudinal edge of the upper horizontal side 210 (see Figures 6(A) and (C)).

[0019] Three fixing pieces, namely a first fixing piece 26, a second fixing piece 27, and a third fixing piece 28, are provided at both ends in the longitudinal direction of the upper frame 2. The first fixing piece 26, the second fixing piece 27, and the third fixing piece 28 are used to fix the upper end portion of the vertical frame 3 to the upper frame 2. The screw holes 262, 272, and 282 formed in the first fixing piece 26, the second fixing piece 27, and the third fixing piece 28 are female screws into which screws S that connect the upper end portion of the vertical frame 3 to the longitudinal end portion of the upper frame 2 are screwed.

[0020] The first fixing piece 26 has an L-shape, consisting of a horizontal piece 260 and a hanging piece 261, and is fixed by abutting the horizontal piece 260 against both ends in the longitudinal direction of the lower surface of the outdoor side upper surface 24 of the upper frame 2. In the illustrated embodiment, the first fixing piece 26 is fixed with screws, but the means of fixing the first fixing piece 26 is not limited, and may be welded, for example. The hanging piece 261 of the first fixing piece 26 is a projection piece that coincides with the longitudinal end edge 2A of the upper frame 2, and a screw hole 262 is formed in the hanging piece 261.

[0021] The second fixing piece 27 has an L-shape, consisting of a horizontal piece 270 and a rising vertical piece 271, and is fixed by abutting the horizontal piece 270 against both ends in the longitudinal direction of the upper surface of the lower surface 22 on the outdoor side of the upper frame 2. In the illustrated embodiment, the second fixing piece 27 is fixed with screws, but the means of fixing the second fixing piece 27 is not limited, and may be welded, for example. The vertical piece 271 of the second fixing piece 27 is a projection piece that coincides with the longitudinal edge 2A of the upper frame 2, and a screw hole 272 is formed in the vertical piece 271.

[0022] The third fixing piece 28 has an L-shape, consisting of a visible piece 280 and a recessed piece 281. The visible piece 280 is a narrow portion with a height dimension corresponding to the intermediate visible surface 220, and is fixed by abutting the visible piece 280 against the back surfaces of both ends in the longitudinal direction of the intermediate visible surface 220. In the illustrated embodiment, the third fixing piece 28 is fixed with screws, but the means of fixing the third fixing piece 28 is not limited and may be, for example, welded. The recessed piece 281 of the third fixing piece 28 coincides with the longitudinal edge 2A of the upper frame 2, and a screw hole 282 is formed in the recessed piece 281, with a projection 283 formed at the upper end. The hanging piece 261 of the first fixing piece 26, the vertical piece 271 of the second fixing piece 27, and the recessed piece 281 of the third fixing piece 28 are located at the longitudinal edge 2A of the upper frame 2 and are located in the same plane.

[0023] [B-2] Lower frame configuration The lower frame 4 is a long steel member extending in the opening width direction, and is obtained by bending a steel plate into a predetermined shape. As shown in Figure 7, the lower frame 4 comprises an outdoor-facing surface 40, an indoor-facing surface 41, and a recessed portion (upper surface) extending in the depth direction between the upper end of the outdoor-facing surface 40 and the upper end of the indoor-facing surface 41. The outdoor-facing surface 40 and the indoor-facing surface 41 have the same height dimension, but an indoor-side inclined surface 410 extending upward toward the outdoor side is integrally formed on the upper part of the indoor-side facing surface 41. The cross-sectional shape of the lower frame 4 is not limited to the illustrated form, and for example, it may not have an indoor-side inclined surface 410.

[0024] The visible portion includes an outdoor upper surface 42 extending horizontally inward from the upper end of the outdoor visible surface 40, an indoor upper surface 43 extending horizontally inward from the upper end of the indoor visible surface 41, and an indoor inclined surface 410. The outdoor portion of the indoor upper surface 43 has a projection 430 integrally formed on it that is located on the outdoor side of the indoor end of the outdoor upper surface 42. The projection 430 faces the indoor portion of the outdoor upper surface 42, and an intermediate visible surface 420 is formed that extends upward from the indoor end of the outdoor upper surface 42 and connects to the base end of the projection 430.

[0025] A groove extending in the direction of the opening width is formed from the indoor portion of the outdoor upper surface 42, the outdoor portion of the indoor upper surface 43 (i.e., the projection 430), and the intermediate visible surface 420, with the indoor portion of the outdoor upper surface 42, the projection 430, and the intermediate visible surface 420 being the lower surface, upper surface, and bottom surface of the groove, respectively. The tip of the projection 430 serves as the door stop. The projection 430, i.e., the door stop, extends along the entire length of the lower frame 4. An airtight rubber (not shown, which also functions as a watertight rubber or cushioning member) is fitted into the groove over its entire width, and the door body D contacts the airtight rubber when in the closed position. In the lower frame 4, the portion that forms the groove in which the airtight rubber is fitted and the indoor upper surface 43 with the projection 430 integrally formed at its tip are referred to as the door stop. The door stop in the lower frame 4 extends along the entire length of the lower frame 4.

[0026] An outdoor lower edge 400 extending horizontally towards the indoor side is formed at the lower end of the outdoor facing surface 40, and an indoor lower edge 411 extending horizontally towards the outdoor side is formed at the lower end of the indoor facing surface 41. A reinforcing piece 44 is fixed to the middle of the length of the lower frame 4 so as to connect the outdoor lower edge 400 and the indoor lower edge 411. The longitudinal edges 4A of the lower frame 4 are located on the same plane (see Figures 7(A) and (C)).

[0027] Fixing pieces 45 are provided at both ends in the longitudinal direction of the lower frame 4. The fixing pieces 45 are used to fix the lower end portion of the vertical frame 3 to the lower frame 4. The fixing piece 45 consists of a vertical piece called a facing piece 450, an outdoor horizontal piece 451 extending horizontally inward from the outdoor side portion of the lower end of the facing piece 450, an indoor horizontal piece 452 extending horizontally inward from the indoor side portion of the lower end of the facing piece 450, and an intermediate projection piece 453 projecting horizontally outward from the middle portion of the lower end of the facing piece 450. The fixing piece 45 extends between the inner surface of the outdoor facing surface 40 and the inner surface of the indoor facing surface 41 of the lower frame 4, with the outdoor horizontal piece 451 fixed to the outdoor lower edge 400 with screws and the indoor horizontal piece 452 fixed to the indoor lower edge 411 with screws. The means for fixing the outdoor horizontal piece 451 and the indoor horizontal piece 452 are not limited and may include, for example, welding.

[0028] The recessed portion 450 of the fixing piece 45 is sized to close the opening between the outdoor-facing surface 40 and the indoor-facing surface 41 at both longitudinal ends of the lower frame 4. The recessed portion 450 of the fixing piece 45 coincides with the longitudinal edge 4A of the lower frame 4, and the recessed portion 450 has a first screw hole 454 on the outdoor side, a second screw hole 455 on the indoor side, and an intermediate third screw hole 456. The first screw hole 454, the second screw hole 455, and the third screw hole 456 are female screws into which screws S that connect the lower end portion of the vertical frame 3 to the longitudinal end portion of the lower frame 4 are screwed. The intermediate projection 453 protrudes from the longitudinal edge 4A of the lower frame 4.

[0029] [B-3] Vertical frame configuration The vertical frame 3 according to this embodiment is a long member extending in the height direction of the opening, and consists of a first member 5 and a second member 6. As shown in Figure 8, the height dimension of the second member 6 is smaller than the height dimension of the first member 5. When the second member 6 is fixed to the first member 5, the upper end 6A of the second member 6 is located below the upper end 5A of the first member 5, and the lower end 6B of the second member is located above the lower end 5B of the first member 5. The second member 6 forms the door stop portion of the vertical frame 3, and the depth portion of the vertical frame 3 includes the door stop portion made of the second member 6, an upper flat portion 30 above the door stop portion, and a lower flat portion 31 below the door stop portion.

[0030] [B-3-1] First Member The first member 5 according to this embodiment is a long steel member extending in the height direction of the opening, and is obtained by bending a steel plate into a predetermined shape. As shown in Figure 9, the first member 5 comprises an outdoor-facing surface 50, an indoor-facing surface 51 extending from the inner end of the outdoor-facing surface 50 to the indoor side, and an outdoor-facing surface 52 extending from the outer end of the outdoor-facing surface 50 to the indoor side. The indoor-facing surface 51 consists of an outdoor-facing first portion 510 facing the outdoor-facing surface 52, and a second portion 511 located on the indoor side of the first portion 510. The first portion 510 and the second portion 511 form the same plane.

[0031] A stepped portion 53 is formed at the indoor end of the inner surface 51. The stepped portion 53 consists of an indoor facing portion 530 that curves inward from the indoor end of the inner surface 51, and an indoor surface piece 531 that extends inward from the indoor facing portion 530. An outer facing piece 54 that extends outward is formed at the indoor end of the outer surface 52. A reinforcing piece 55 is fixed to the first member 5 at an intermediate height, connecting the inner surface of the second portion 511 of the inner surface 51 and the inner surface of the outer surface 52.

[0032] In the first member 5, the lower end 5B of the first member 5, specifically the lower end of the outdoor facing surface 50, the inner depth surface 51, the outer depth surface 52, the stepped portion 53, and the outer facing piece 54, are in the same position, but the upper end 5A of the first member 5 is in a partially different position. Specifically, the heights of the upper ends 500, 5100, 520, and 540 of the outdoor facing surface 50, the first portion 510 of the inner depth surface 51, the outer depth surface 52, and the outer facing piece 54 of the first member 5 are higher than the heights of the upper ends 5110 and 532 of the second portion 511 of the inner depth surface 51 and the stepped portion 53.

[0033] At the upper end of the inner surface 51 (forming the upper flat portion 30 of the surface of the vertical frame 3), a first insertion hole 512 and a second insertion hole 513 are formed at the upper end of the first portion 510, spaced apart vertically, and a third insertion hole 514 is formed at the upper end of the second portion 511. The first insertion hole 512, the second insertion hole 513, and the third insertion hole 514 are holes through which screws S that connect the upper end of the vertical frame 3 to the longitudinal end of the upper frame 2 are inserted. In the illustrated embodiment, the first insertion hole 512, the second insertion hole 513, and the third insertion hole 514 are elongated horizontal holes, but the invention is not limited to this.

[0034] At the lower end of the inner depth surface 51 (forming the lower flat portion 31 of the depth of the vertical frame 3), a fourth insertion hole 515 is formed at the lower end of the first portion 510, and a fifth insertion hole 516 and a sixth insertion hole 517 are formed at the lower end of the second portion 511, spaced apart in the depth direction. The fourth insertion hole 515, fifth insertion hole 516, and sixth insertion hole 517 are holes through which screws S that connect the lower end of the vertical frame 3 to the longitudinal end of the lower frame 4 are inserted. In the illustrated embodiment, the fourth insertion hole 515, fifth insertion hole 516, and sixth insertion hole 517 are elongated horizontal holes, but are not limited to this.

[0035] [B-3-2] Second component The second member 6 in this embodiment is a long steel member extending in the height direction of the opening, and is obtained by bending a steel plate into a predetermined shape. As shown in Figure 10, the second member 6 comprises an outdoor-facing surface 60, an indoor-facing surface 61, and a recessed surface 62 connecting the inner ends of the outdoor-facing surface 60 and the indoor-facing surface 61. The outdoor-facing portion of the recessed surface 62 is a projection 63 that protrudes further outward than the outdoor-facing surface 60. The outdoor-facing surface 60 has an outer recessed piece 64 extending from its outer end to the indoor side, and the indoor-facing surface 61 has an outer recessed piece 65 extending from its outer end to the outdoor side.

[0036] [B-3-3] Fixing of the first and second members As shown in Figure 8, the vertical frame 3 is formed by fixing the second member 6 to the inner surface 51 of the first member 5. More specifically, an insertion hole 518 is formed in a predetermined location on the second portion 511 of the inner surface 51 of the first member 5, located below the portion that forms the upper flat portion 30 and above the portion that forms the lower flat portion 31. Screw holes 66 are formed in predetermined locations on the outer pieces 64 and 65 of the second member 6. With the outer pieces 64 and 65 of the second member 6 in contact with the second portion 511 of the inner surface 51 of the first member 5, the insertion hole 518 and the screw holes 66 are aligned and the member is fixed with screws S' from the inner surface side of the inner surface 51.

[0037] A groove is formed in the height direction of the opening from the inner surface 51 (second portion 511) of the first member 5, the projection 63 of the second member 6, and the outer surface 60 of the second member 6, with the inner surface 51 (second portion 511), projection 63, and outer surface 60 being the outer, inner, and bottom surfaces of the groove, respectively. An airtight or watertight rubber (functioning as a buffer) is fitted into the groove over its entire height, and the door body D comes into contact with the airtight rubber when in the closed position. In the vertical frame 3, the second member 6 serves as the door stopper.

[0038] The upper end 6A of the second member 6 is located below the upper end 5A of the first member 5 and below the third insertion hole 514. In the projection of the vertical frame 3, an upper flat portion 30 is formed on the upper side of the second member 6 (door stop portion), and the upper flat portion 30 includes the upper end portion of the first portion 510 and the upper end portion of the second portion 511.

[0039] The lower end 6B of the second member 6 is located above the lower end 5B of the first member 5 and above the third insertion hole 517. In the projection of the vertical frame 3, a lower flat portion 31 is formed on the lower side of the second member 6 (door stop portion), and the lower flat portion 31 includes the lower end portion of the first portion 510 and the lower end portion of the second portion 511.

[0040] [B-3-4] Other fixing structures for the first and second members Figure 11 shows another fixing structure for the second member 6 to the first member 5. As shown in Figure 11, the outer facing pieces 64 and 65 of the second member 6 are brought into contact with the second portion 511 of the inner facing surface 51 of the first member 5, and the second member 6 is fixed with screws S' from the facing surface 62 facing the opening. In the configuration shown in Figure 11, with the door frame 1 fixed to the building structure, the screws S' can be removed to detach only the second member 6 from the vertical frame 3 of the door frame 1, and the second member 6 can be replaced as needed. The second member 6 forms both a door stop and a mounting portion for the airtight rubber. For example, if it is desired to change the shape of the airtight rubber, it may be necessary to change the shape of the groove formed by the second member 6 (door stop), and in such cases, it is possible to replace it with a second member 6 of a different shape.

[0041] [C] Assembly and construction of door frame As shown in Figures 1 and 2, the height dimension of the vertical frame 3 is approximately the same as the height dimension of the door frame 1. The upper frame 2 is positioned between the upper ends of the left and right vertical frames 3, and the upper end of the recessed portion of the vertical frame 3 is connected to the longitudinal end of the upper frame 2 with screws S. The lower frame 4 is positioned between the lower ends of the left and right vertical frames 3, and the lower end of the recessed portion of the vertical frame 3 is connected to the longitudinal end of the lower frame 4 with screws S, thereby assembling the door frame 1, which is a four-sided frame. In addition, in this embodiment, watertight materials 7A and 8 are provided at the abutment points between the upper frame 2 and the vertical frame 3, and watertight materials 7B and 9 are provided at the abutment points between the lower frame 4 and the vertical frame 3, thereby improving the watertight performance of the door frame 1. A more detailed explanation follows below.

[0042] [C-1] Connection configuration of the upper frame and the vertical frame With the longitudinal edge 2A of the upper frame 2 in contact with the upper flat portion 30 of the recess of the vertical frame 3, and the upper end 6A of the second member 6 (door stop portion) of the vertical frame 3 in contact with the indoor lower surface 23 (recess surface of the door stop portion) of the upper frame 2, the first screw holes 262, second screw holes 272, and third screw holes 282 formed in the hanging piece 261 of the first fixing piece 26, the vertical piece 271 of the second fixing piece 27, and the recessed piece 281 of the third fixing piece 28 located on the longitudinal edge 2A of the upper frame 2, the first insertion holes 512, second insertion holes 513, and third insertion holes 514 of the vertical frame 3 coincide with these holes, and the vertical frame 3 and the upper frame 2 are fixed by screws S provided in these holes (see Figures 2, 3, and 4).

[0043] In this embodiment, as shown in Figure 8, a watertight material 7A is provided on the upper flat surface 30 of the recessed portion of the vertical frame 3, and the longitudinal edge 2A of the upper frame 2 abuts against the upper flat surface 30 of the vertical frame 3 via the watertight material 7A. The abutment portion of the recessed portion of the vertical frame 3 that the longitudinal edge 2A of the upper frame 2 abuts against is the upper flat surface 30, which is a single plane, and the watertight material 7A only needs to be attached to the upper flat surface 30, which is a single plane. Therefore, it is sufficient to prepare a watertight material 7A with a shape corresponding to the abutment portion and simply attach it, resulting in good workability.

[0044] As shown in Figure 6, watertight materials 8 are provided at both ends of the indoor lower surface 23 of the upper frame 2 in the direction of the opening width, and the upper end 6A of the second member 6 (door stop portion) of the vertical frame 3 abuts against the indoor lower surface 23 (the visible surface of the door stop portion) of the upper frame 2 via the watertight materials 8. Foamed polyethylene is an example of the material for the watertight materials 7A and 8, but the material is not limited.

[0045] [C-2] Connection configuration of the lower frame and the vertical frame With the longitudinal edge 4A of the lower frame 4 in contact with the lower flat portion 31 of the vertical frame 3, and the lower end 6B of the second member 6 of the vertical frame 3 in contact with the indoor upper surface 43 (the projection surface of the door stop) of the lower frame 4, the first screw holes 454, second screw holes 455, and third screw holes 456 formed in the projection piece 450 of the fixing piece 45 located at the longitudinal edge 4A of the lower frame 4 coincide with the fourth insertion hole 515, fifth insertion hole 516, and sixth insertion hole 517 of the vertical frame 3, and the vertical frame 3 and the lower frame 4 are fixed by screws S provided in these holes (see Figures 2 and 5).

[0046] In this embodiment, as shown in Figure 8, a watertight material 7B is provided on the lower flat surface 31 of the recessed portion of the vertical frame 3, and the longitudinal edge 4A of the lower frame 4 abuts against the lower flat surface 31 of the vertical frame 3 via the watertight material 7B. The abutment portion of the recessed portion of the vertical frame 3 that the longitudinal edge 4A of the lower frame 4 abuts against is the lower flat surface 31, which is a single plane, and the watertight material 7B only needs to be attached to the lower flat surface 31, which is a single plane. Therefore, it is sufficient to prepare a watertight material 7B with a shape corresponding to the abutment portion and simply attach it, resulting in good workability.

[0047] As shown in Figure 7, watertight materials 9 are provided at both ends of the indoor upper surface 43 of the lower frame 4 in the direction of the opening width, and the lower end 6B of the second member 6 of the vertical frame 3 abuts against the indoor upper surface 43 (the visible surface of the door stop) of the lower frame 4 via the watertight materials 9. Foamed polyethylene is an example of the material for the watertight materials 7B and 9, but the material is not limited.

[0048] [D] Door frame configuration related to comparative example Referring to Figures 12 to 15, the door frame structure of the comparative example will be described. The door frame is assembled in a circumferential manner from left and right vertical frames 11 (the right side is not shown), an upper frame 12, and a lower frame 15. Similar to this embodiment, in the comparative example, the longitudinal edges of the upper frame 12 and lower frame 15 abut against the upper and lower ends of the recessed portion of the vertical frame 11, respectively, and are fixed using screws S''. However, as will be clear from the following description, a step is created at the abutment point, and it is necessary to attach a watertight material 7'' to the stepped abutment point.

[0049] [D-1] Vertical frame of the door frame in the comparative example As shown in Figures 13 and 14, the outdoor-facing surface 110 of the vertical frame 11 has a recessed portion that extends inward from the inner end of the outdoor-facing surface 110. The recessed portion comprises an outdoor-facing recessed surface 111 and an indoor-facing recessed surface 112, with the outdoor end of the indoor-facing recessed surface 112 forming a projection 113. The recessed portion includes grooves formed at the indoor-facing portion of the outdoor-facing recessed surface 111 and the outdoor-facing portion of the indoor-facing recessed surface 112.

[0050] An outer facing surface 114 is formed extending inward from the outer end of the outdoor facing surface 110, and an outer facing piece 115 is formed extending outward from the end of the outer facing surface 114. An indoor facing surface 116 is formed extending outward in the facing direction from the indoor end of the indoor facing surface 112 of the facing portion, and a facing piece 117 is formed extending inward from the end of the indoor facing surface 116.

[0051] In the upper part of the projection of the vertical frame 11, the outdoor projection surface 111 and the indoor projection surface 112 form a stepped abutment. Through holes 1110 and 1111 are formed in the upper part of the outdoor projection surface 111, spaced apart vertically, and a through hole 1120 is formed in the upper part of the indoor projection surface 112.

[0052] Since the vertical frame 11 is formed by bending a single steel plate, there are no plate-like elements on the back of the indoor-side facing surface 112. In order to form a joint with the longitudinal edge of the upper frame 2, it is necessary to leave the indoor-side facing surface 112, which inevitably creates a step. In the comparative example, the joint is formed from a stepped outdoor-side facing surface 111 and an indoor-side facing surface 112. Therefore, the watertight material 7' to be attached to the joint also needs to be installed along the step, which makes it difficult to work with and to install the watertight material effectively.

[0053] [D-2] Upper frame of door frame relating to comparative example As shown in Figure 15, the outdoor-facing surface 120 of the upper frame 12 has a recessed portion (bottom surface) that extends inward from the lower end of the outdoor-facing surface 120. The recessed portion comprises an outdoor-facing bottom surface 121 and an indoor-facing bottom surface 122. The outdoor end of the indoor-facing bottom surface 122 forms a projection 123. The recessed portion (bottom surface) includes grooves formed at the indoor-facing portion of the outdoor-facing bottom surface 121 and the outdoor-facing portion of the indoor-facing bottom surface 122.

[0054] An outdoor upper surface 124 is formed extending inward from the upper end of the outdoor facing surface 120, and an upper facing piece 125 is formed extending upward from the end of the outdoor upper surface 124. An indoor facing surface 126 is formed extending upward from the indoor end of the indoor lower surface 122 of the recessed portion (lower surface), and a recessed piece 127 is formed extending inward from the upper end of the indoor facing surface 126.

[0055] A first fixing piece is provided on the lower surface of the outdoor-side upper surface 124, located at the longitudinal end of the upper frame 12, and a second fixing piece is provided at the bottom of the groove. However, the recessed piece 13 of the first fixing piece and the recessed piece 14 of the second fixing piece are not located in the same plane but are positioned in a stepped manner. Screw holes 130 and 131 are formed in the recessed piece 13 of the first fixing piece, spaced apart vertically, and a screw hole 140 is formed in the recessed piece 14 of the second fixing piece. When the longitudinal end edge of the upper frame 12 abuts against the recessed portion of the vertical frame 11, the insertion holes 1110, 1111, and 1120 and the screw holes 130, 131, and 140 are aligned and fixed with screws S''. [Explanation of Symbols]

[0056] 1. Door frame 2 Upper frame (second frame material) 22. Outdoor side bottom surface (protruding part of the second frame material) 23 Indoor underside (Second frame material, second door stopper, and visible surface) 230 Projection piece (second door stop section) 2A Longitudinal edge 26 1st fixed piece 261 Hanging piece (expected piece) 27 Second fixed piece 271 Vertical piece (depth piece) 28 Third fixed piece 281 Expected Piece 3 Vertical frame (first frame material) 30 Upper flat section (flat section of the first frame member) 31 Lower flat section (flat section of the first frame member) 4 Lower frame (second frame material) 42. Outdoor side top surface (protruding part of the second frame material) 43. Indoor upper surface (deep portion of second frame material, second door stop portion, deep surface) 430 Projection piece (second door stop section) 4A Longitudinal edge 45 Fixed piece 450 Expected Pieces 5. First member of the vertical frame 51. Dimensions (the visible portion of the vertical frame) 5A top end 5B Bottom end 6. Second member of the vertical frame (first door stop section) 6A Upper end (lengthwise edge of the first door stop) 6B Lower end (lengthwise edge of the first door stop) 62. View 63 Projection piece 7A Watertight material 7B Watertight material 8 Watertight material 9 Watertight material S screw

Claims

1. In a door frame structure in which a first frame member extending in the height direction and a second frame member extending in the opening width direction are connected by screws, The recess of the first frame member consists of a first door stop portion extending in the height direction and flat portions located on both sides of the first door stop portion. The first frame material is formed by bending a steel plate and consists of a first member extending along the entire length of the first frame material and a second member formed by bending a steel plate, which is shorter than the first member and fixed to the facing surface of the first member. The forward surface of the first member is provided with an outer portion located on the height side of the first door stop portion fixed to the forward surface, The second member forms the first door stop portion, the outer portion of the forward surface of the first member forms the flat portion, and a watertight material is provided on the flat portion. The projection portion of the second frame member is provided with a second door stop portion that extends in the opening width direction along the entire length of the second frame member. The longitudinal edge of the second frame member abuts against the flat portion of the first frame member via the watertight material, and the longitudinal edge of the first door stop portion of the first frame member abuts against the depth surface of the second door stop portion of the second frame member, with the first frame member and the second frame member fixed together with screws. Door frame structure.

2. The second member is fixed to the surface of the front surface of the first member by tightening a screw from the back side of the front surface of the first member. The door frame structure according to claim 1.

3. A watertight material is provided at the end region of the projection surface of the second door stop portion of the second frame material, and the longitudinal edge of the first door stop portion of the first frame material is in contact with the watertight material. The door frame structure according to either claim 1 or 2.

4. A fixing projection is formed at the longitudinal edge of the second frame material, The flat portion of the first frame material is fixed to the fixing piece by the screw. The door frame structure according to any one of claims 1 to 3.

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