Door frame and opening frame fixing structure

Abstract

To provide a fixing structure for door frames and opening frame members, which does not use welding, and is applicable even when an opening frame member and a stud have the same width.SOLUTION: A door frame has first projection pieces 15, 25, and second projection pieces 16, 26 formed on its back surface. An opening frame member 3 comprises a first side piece 30 and a second side piece 31. The first projection pieces 15, 25 consist of first aspect sections 150, 250, side sections 151, 251, and second aspect sections 152, 252. The second aspect sections 152, 252 are fixed to the first aspect piece 30 with a screw S1. The second projection pieces 16, 26 are connected to a connection member 5 with a screw S2. The connection member 5 is fixed to the second aspect piece 31 with a screw S3.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a structure for fixing a door frame to a frame member of an opening. [Background technology]

[0002] Generally, a door frame is fixed to a structural body of a building at the construction site to form an opening that is opened and closed by a door. In addition, the door frame is often fixed by welding an element (sometimes called an anchor) provided on the back of the door frame to the structural body of the building (Patent Document 1).

[0003] However, the method of fixing door frames by welding cannot be used in construction sites where hot work is prohibited, and since welding requires skilled techniques, securing construction engineers is also an issue. Therefore, there is a need for a method of fixing door frames to the building frame structure without using welding.

[0004] Patent Document 2 discloses a fixing structure for a door frame and an opening frame material that does not require welding work, but this method has difficulty in accommodating a structure on the main body side where the width dimensions of the opening frame material and the base frame material (studs) are the same. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2012-87529 [Patent Document 2] Patent Publication No. 2021-134588 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0006] The present invention aims to provide a fixing structure for a door frame and an opening frame material that does not require welding work when fixing a door frame to an opening frame material, and that can be used even when the opening frame material and the base frame material (studs) are the same width. [Means for solving the problem]

[0007] The technical means adopted by the present invention are: A fixing structure between a door frame and an opening frame material, A first protrusion and a second protrusion extending in the front direction are formed on the rear surface of the door frame, The opening frame member has a first visible surface, a second visible surface, and a visible surface, The first protruding piece comprises a first protruding portion, a protruding portion extending from the first protruding portion toward the second protruding piece side, and a second protruding portion extending from the protruding portion toward the opening frame member in the protruding direction, the second facing portion of the first protruding piece is fixed to the first facing surface of the opening frame member with a screw, The second protrusion is connected to a connecting member with a screw, and the connecting member is fixed to the second visible surface or the visible surface of the opening frame material with a screw. It is a fixed structure between the door frame and the opening frame material.

[0008] In one embodiment, the second protruding piece and the connecting member, when connected together, have a shape that forms a first visible portion, a visible portion extending from the first visible portion toward the first protruding piece side, and a second visible portion extending from the visible portion toward the opening frame member side, The second mounting portion is fixed to the second mounting surface with a screw.

[0009] In one embodiment, the second protrusion is a spotting piece, The connecting member comprises a first facing piece, a facing piece forming the facing portion, and a second facing piece forming the second facing portion, The first projection piece of the connecting member is connected to the second projection piece with a screw, thereby forming the first projection part.

[0010] In one embodiment, the opening frame member is provided with a base frame member adjacent to the opposite side of the door frame, the base frame member having a first visible surface and a second visible surface, The projected width of the opening frame material and the projected width of the base frame material are the same, The first visible surface of the base frame material and the first visible surface of the opening frame material are flush with each other, The first visible surface of the opening frame member comprises a first portion with which the second visible portion of the first protruding piece abuts, and a second portion located on the base frame member side, A first inner board is provided along at least a first facing surface of the base frame material, A first outer board is provided adjacent to the first inner board. In one embodiment, the first inner board is arranged along the first visible surface of the base frame material and the second portion of the first visible surface of the opening frame material, and typically, the inner surface of the first inner board abuts the first visible surface of the base frame material and the second portion of the first visible surface of the opening frame material. In one embodiment, an end of the first inner board abuts or is close to a tip of the second protruding portion of the first projecting piece. In one embodiment, the furring strip is a stud.

[0011] In one embodiment, the first protrusion of the door frame is integrally protruded from a first outer visible surface of the rear surface of the door frame, The surface portion of the first outer board abuts or is close to the first visible portion of the first protrusion, and the end portion of the first outer board abuts or is close to the first outer visible surface of the door frame.

[0012] In one embodiment, the second visible surface of the base frame material and the second visible surface of the opening frame material are flush with each other, The second facing surface of the opening frame member comprises a first portion to which the second facing piece of the connecting member abuts and a second portion located on the base frame member side, A second inner board is provided at least along a second facing surface of the base frame material, A second outer board is provided adjacent to the second inner board. In one embodiment, the second inner board is arranged along the second visible surface of the base frame material and the second portion of the second visible surface of the opening frame material, and typically, the inner surface of the second inner board abuts the second visible surface of the base frame material and the second portion of the second visible surface of the opening frame material. In one embodiment, the end of the second inner board abuts or is close to the tip of the second attachment piece of the connecting member. In one embodiment, the furring strip is a stud.

[0013] In one embodiment, the second protrusion of the door frame is integrally protruded from a second outer visible surface of the rear surface of the door frame, The surface portion of the second outer board abuts or is close to the first visible piece of the connecting member, and the end portion of the second outer board abuts or is close to the second outer visible surface of the door frame. [Effects of the Invention]

[0014] Since the fixing structure of the door frame and opening frame material of the present invention is fixed with screws, no welding work is required, and even if the opening frame material and the stud are the same width (not limited to this embodiment), a good fixing structure can be obtained. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a front view of the door device according to the present embodiment as seen from the first side, showing the door frame attached to the building opening with the exterior wall board omitted. FIG. [Figure 2] FIG. 2 is a front view of the door device according to the present embodiment as seen from the second side, showing the door frame attached to the building opening with the exterior wall board omitted. [Figure 3] 1 is a partial vertical cross-sectional view of a door frame attached to a building opening according to this embodiment, showing the mounting structure of the upper frame. [Figure 4]FIG. 2 is a partial cross-sectional view of a door frame attached to a building opening according to the present embodiment, showing the mounting structure of one of the vertical frames. [Figure 5] 10 is a diagram showing the installation of the door frame, and is a partially enlarged view (front view seen from the first side) of a corner of the three-sided door frame. FIG. [Figure 6] FIG. 2 is a diagram showing a vertical frame according to the present embodiment. [Figure 7] FIG. 2 is a diagram showing an upper frame according to the present embodiment. [Figure 8] 10A and 10B are diagrams illustrating a connecting member according to the present embodiment. [Figure 9] 10A to 10C are diagrams illustrating a method for fixing the door frame according to the present embodiment. [Figure 10] 10 is a partial cross-sectional view of a door frame installed in a building opening according to another embodiment, showing the mounting structure of one of the vertical frames. FIG. [Figure 11] 10A and 10B are diagrams illustrating a method for fixing a door frame according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] [A] Overall structure of the door device An embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a front view of a door device attached to a building opening, as seen from a first side, and Fig. 2 is a front view of the door device as seen from a second side. The boards forming the finishing wall (first outer board 7A and second outer board 7B as overlay boards) are omitted, showing the state before the boards (first outer board 7A as overlay board, first inner board 6A, second outer board 7B, and second inner board 6B as overlay boards) are attached. The door frame according to this embodiment is a three-sided frame consisting of a top frame 1 and left and right vertical frames 2. The space enclosed by the three-sided door frame and floor FL forms the building opening, and the building opening is opened and closed by a door body D via hinges H. The door frame in the illustrated embodiment is for a hinged door, but the type of door is not limited thereto.

[0017] A three-sided door frame is assembled in a factory by fastening (by welding, screws, etc.) the upper ends of left and right metal (e.g., steel) vertical frames 2 to both longitudinal ends of a metal (e.g., steel) top frame 1. That is, the door frame is assembled in the factory, transported to the construction site, and fastened to the building structure. In this embodiment, the building structure is composed of an opening frame member 3, studs 4 to which the opening frame member 3 is fixed, and runners 4', and the door frame is attached to the opening frame member 3. Note that the three-sided door frame is merely an example, and the door frame may also be a four-sided frame with a bottom frame (sill). In this embodiment, the door frames (top frame 1, left and right vertical frames 2) have the same projected dimensions, but the projected dimensions of the top frame 1 and the left and right vertical frames 2 may be different. For example, the projected dimensions of the left and right vertical frames 2 may be larger than the projected dimension of the top frame 1.

[0018] [B] Door frame configuration [B-1] Upper frame The configuration of the upper frame 1 will be described with reference to Figures 3 and 7. The upper frame 1 is a long member extending in the opening width direction (horizontal direction) and is composed of a first visible surface 10 on the first side, a second visible surface 11 on the second side, an inner prospective portion (lower surface portion) 12 connecting the inner ends (lower ends) of the first visible surface 10 and the second visible surface 11, a first outer (upper) prospective edge 13 extending in the prospective direction from the outer end (upper end) of the first visible surface 10, a second outer (upper) prospective edge 14 extending in the prospective direction from the outer end (upper end) of the second visible surface 11, a first protruding piece 15 extending upward from the tip of the first outer prospective edge 13, and a second protruding piece 16 extending upward from the tip of the second outer prospective edge 14.

[0019] The lower surface portion 12 of the upper frame 1 comprises a first visible surface 120 extending in the visible direction from the inner edge of the first visible surface 10, a second visible surface 121 extending in the visible direction from the inner edge of the second visible surface 11, and a downwardly convex central visible portion 122 located between the first visible surface 120 and the second visible surface 121. The cross-sectional shape of the upper frame 1 (particularly the lower surface portion 12) is not limited. In the upper frame 1, a first outer (upper) visible edge 13 and a second outer (upper) visible edge 14 are spaced apart, and multiple connecting elements (band anchors) 17 are fixed (welded, screwed, etc.) between the first outer (upper) visible edge 13 and the second outer (upper) visible edge 14 at intervals in the width direction (opening width direction) of the upper frame 1, thereby improving the strength of the upper frame 1.

[0020] The first protrusion 15 and second protrusion 16 of the upper frame 1 are located on the back surface (upper side, or the side farthest from the opening) of the upper frame 1, extending apart and facing each other, and constitute mounting pieces for attaching the upper frame 1 to the main structure (opening frame material 3). The first protrusion 15 consists of a first facing portion 150, a facing portion 151 extending from the first facing portion 150 toward the second protrusion 16, and a second facing portion 152 extending from the facing portion 151 toward the opening frame material (upward). A connecting member 5 (the connecting member 5 will be described later) is connected to the second protrusion 16 with a screw S2. The upper frame 1 is fixed to the opening frame material 3 extending in the opening width direction by the first protrusion 15, the second protrusion 16, and the connecting member 5 using screws S1 and S3.

[0021] [B-2] Vertical frame 4 and 6, the configuration of the vertical frame 2 will be described. The left and right vertical frames 2 are elongated members extending in the height direction (vertical direction), and comprise a first visible surface 20 on the first side, a second visible surface 21 on the second side, an inner visible portion 22 connecting the inner ends of the first visible surface 20 and the second visible surface 21, a first outer visible edge 23 extending in the visible direction from the outer end of the first visible surface 20, a second outer visible edge 24 extending in the visible direction from the outer end of the second visible surface 21, a first protruding piece 25 extending outward from the tip of the first outer visible edge 23, and a second protruding piece 26 extending outward from the tip of the second outer visible edge 24.

[0022] The inner projection portion 22 of the vertical frame 2 comprises a first inner projection surface 220 extending in the projection direction from the inner end of the first projection surface 20, a second inner projection surface 221 extending in the projection direction from the inner end of the second projection surface 21, and a convex central projection portion 222 located between the first inner projection surface 220 and the second inner projection surface 221. The cross-sectional shape of the vertical frame 2 (particularly the inner projection portion 22) is not limited. A plurality of hinge elements H (see FIG. 1) are provided at intervals in the height direction on the first inner projection surface 220 of one (end-of-door) vertical frame 2. In the vertical frame 2, the first outer projected edge 23 and the second outer projected edge 24 are spaced apart, and a plurality of connecting elements (band anchors) 27 are fixed (welded, screwed, etc.) between the first outer projected edge 23 and the second outer projected edge 24 at intervals in the height direction of the vertical frame 2, thereby improving the strength of the vertical frame 2.

[0023] The first protrusion 25 and second protrusion 26 of the vertical frame 2 are located on the back surface of the vertical frame 2, extending apart and facing each other, and constitute mounting pieces for attaching the vertical frame 2 to a structural body (opening frame material 3) on the main body side. The first protrusion 25 consists of a first facing portion 250, a facing portion 251 extending from the first facing portion 250 toward the second protrusion 26, and a second facing portion 252 extending from the facing portion 251 in the facing direction toward the opening frame material. A connecting member 5 (the connecting member 5 will be described later) is connected to the second protrusion 26 with a screw S2. The vertical frame 2 is fixed to the opening frame material 3 extending in the height direction by the first protrusion 25, the second protrusion 26, and the connecting member 5 using screws S1 and S3.

[0024] [B-3] Corner structure of the frame In this embodiment, the upper frame 1 and the vertical frame 2 have the same cross-sectional shape. The inner projection portion (lower surface portion) 12 of the upper frame 1 and the inner projection portions 22 of the left and right vertical frames 2 form a three-sided projection portion. The first outer (upper) projection edge 13 of the upper frame 1 and the first outer projection edge 23 of the vertical frame 2 form a three-sided projection surface, and the second outer (upper) projection edge 14 of the upper frame 1 and the second outer projection edge 24 of the vertical frame 2 form a three-sided projection surface. The projection portion 151 of the first protruding piece 15 of the upper frame 1 and the projection portion 251 of the first protruding piece 25 of the vertical frame 2 form a three-sided projection surface, and the projection piece 51 of the connecting member 5 connected to the second protruding piece 16 of the upper frame 1 and the projection piece 51 of the connecting member 5 connected to the second protruding piece 26 of the vertical frame 2 form a three-sided projection surface.

[0025] At the corner of the three-sided frame consisting of the top frame 1 and the left and right vertical frames 2, the first visible surface 10 of the top frame 1 and the first visible surface 20 of the vertical frame 2 are flush, the first visible portion 150 of the first protrusion 15 of the top frame 1 and the first visible portion 250 of the first protrusion 25 of the vertical frame 2 are flush, and the second visible portion 152 of the first protrusion 15 of the top frame 1 and the second visible portion 252 of the first protrusion 25 of the vertical frame 2 are flush (see Figure 5).

[0026] At the corner of the three-sided frame consisting of the top frame 1 and the left and right vertical frames 2, the second visible surface 11 of the top frame 1 and the second visible surface 21 of the vertical frame 2 are flush, the first visible piece 50 of the connecting member 5 connected to the second protrusion 16 of the top frame 1 and the first visible piece 50 of the connecting member 5 connected to the second protrusion 26 of the vertical frame 2 are flush, and the second visible piece 52 of the connecting member 5 connected to the second protrusion 16 of the top frame 1 and the second visible piece 52 of the connecting member 5 connected to the second protrusion 26 of the vertical frame 2 are flush.

[0027] [C] Structure on the main body side The body-side structure according to this embodiment is composed of an opening frame member (sometimes referred to as a reinforcing frame member) 3 to which the door frame is fixed, and a base frame member to which the opening frame member 3 is fixed. The base frame member includes left and right studs 4 extending vertically, runners 4' that horizontally connect predetermined positions on the upper side of the left and right studs 4 in the height direction, and runners 4' that horizontally connect the lower end portions of the left and right studs 4. Typically, the opening frame member 3, studs 4, and runners 4' are made of metal (for example, steel).

[0028] As shown in Fig. 4, the stud 4 is a long member extending in the height direction and having a U-shaped cross section with a first visible edge 40, a second visible edge 41, and a visible edge 42, and is provided in a vertical position with the visible edge 42 positioned toward the opening. As shown in Fig. 3, the runner 4' is a long member extending in the horizontal direction and having a U-shaped cross section with a first visible edge 40', a second visible edge 41', and a visible edge (lower edge) 42', and is provided with the visible edge 42' positioned toward the opening (lower side). In this embodiment, the upper portion of the stud 4 extends upward beyond the runner 4' and is connected to an upper runner 4' fixed to the top wall.

[0029] As shown in FIGS. 3 and 4 , the opening frame member 3 is a long member having a U-shaped cross section with a first visible edge 30, a second visible edge 31, and a projected edge 32. The left and right opening frame members 3 extend in the height direction and are fixed to the studs 4 in a vertical position with the projected edge 32 positioned toward the opening. The upper opening frame member 3 extends horizontally (in the opening width direction) and is fixed to the runner 4′ in a horizontal position with the projected edge 32 positioned toward the opening (lower side). The left and right opening frame members 3 extend upward beyond the runner 4′ and the upper opening frame member 3 and are connected to a horizontal member fixed to the upper wall. In this embodiment, the left and right opening frame members 3 and the upper opening frame member 3 form a three-sided frame, and the upper portions of the left and right opening frame members extend upward beyond the upper opening frame member 3.

[0030] The tips of the first visible edge 30 and the second visible edge 31 of the opening frame material 3 according to this embodiment are bent inward to form bent pieces 33, 34, and the opening frame material 3 is fixed by abutting the bent pieces 33, 34 against the visible edge 42 of the stud 4 and the visible edge 42' of the runner 4'. Welding is an example of a means for fixing the opening frame material 3. At the stage of installing the opening frame material 3, there are no flammable materials on site that would make work with fire a problem, so there are no problems caused by using welding. The opening frame material 3 may also be fixed to the stud 4 and runner 4' using screws.

[0031] As described above, in this embodiment, the structural body of the building is made up of the opening frame material 3, studs 4, and runners 4', and the door frame (a three-sided frame consisting of the top frame 1 and left and right vertical frames 2) is positioned and fixed in place by adjusting its position relative to the structural body (opening frame material 3). This position adjustment includes adjusting the position of the door frame in the front direction relative to the opening frame material 3. In this embodiment, the projected width of the opening frame material 3 and the projected width of the studs 4 are the same (see Figure 4), and the projected width of the opening frame material 3 is slightly smaller than the projected width of the runners 4' (see Figure 3). The projected width of the opening frame material 3 is the same on all three sides.

[0032] [D] Connecting member The connecting member 5 is a long member that extends in the length direction (opening width direction) of the upper frame 1 and in the length direction (height direction) of the vertical frame 2, and as shown in Figure 8, the connecting member 5 is made up of a first facing piece 50, a facing piece 51, and a second facing piece 52. The first facing piece 50 and the second facing piece 52 of the connecting member 5 have insertion holes 500, 520 for screws S2, S3 formed at intervals in the length direction.

[0033] When the connecting member 5 is connected to the second protrusion 16 of the upper frame 1 with the screw S2, the integrated second protrusion 16 and connecting member 5 have a shape that is approximately symmetrical to the first protrusion 15. More specifically, when connected, the second protrusion 16 and connecting member 5 have a shape that forms a first visible portion (second protrusion 16 and first visible portion 50), a visible portion (visible portion 51) extending from the first visible portion toward the first protrusion 15 side, and a second visible portion (second visible portion 52) extending from the visible portion toward the opening frame material side.

[0034] The second protrusion 26 and the connecting member 5, which are integrated by connecting the connecting member 5 to the second protrusion 26 of the vertical frame 2 with the screw S2, have a shape that is approximately symmetrical to the first protrusion 25. More specifically, the second protrusion 26 and the connecting member 5, when connected, have a shape that forms a first visible portion (second protrusion 26 and first visible portion 50), a visible portion (visible portion 51) extending from the first visible portion toward the first protrusion 25, and a second visible portion (second visible portion 52) extending from the visible portion toward the opening frame material.

[0035] [E] Door frame and opening frame fixing structure [E-1] Fixing structure of vertical frame and opening frame material The structure for fastening the vertical frame 2 and the opening frame material 3 will be described with reference to Figure 4. A first protrusion 25 and a second protrusion 26 extend facing each other at a distance from the back surface of the vertical frame 2 of the door frame. When the connecting member 5 is connected to the second protrusion 26 of the vertical frame 2, the second visible portion 252 of the first protrusion 25 and the second visible piece 52 of the connecting member 5 face each other at a distance, with the dimension therebetween being approximately the same as the visible width of the opening frame material 3, and the vertical frame 2 clamps and fastens the opening frame material 3 from the inside and outside.

[0036] The second facing portion 252 of the first projection 25 of the vertical frame 2 is fixed to the first facing edge 30 with a screw S1 while abutting against the outer surface of the first facing edge 30 of the opening frame member 3. At this time, the first facing surface of the opening frame member 3 formed by the first facing edge 30 consists of a first portion 300 with which the second facing portion 252 of the first projection 25 of the vertical frame 2 abuts, and a second portion 301 located on the stud side. Because the first portion 300 of the first projection 25 of the vertical frame 2 is fixed in a state where it overlaps with the first facing edge 30 of the opening frame member 3, a fire compartment can be formed. The second portion 301 of the first facing edge 30 of the opening frame member 3 is exposed before the first inner board 6A is attached (see Figure 9).

[0037] The connecting member 5 is connected to the second protrusion 26 of the vertical frame 2 with a screw S2, and the second facing piece 52 of the connecting member 5 is fixed to the second facing edge 31 with a screw S3 while abutting against the outer surface of the second facing edge 31 of the opening frame member 3. At this time, the second facing surface of the opening frame member 3 formed by the second facing edge 31 consists of a first portion 310 abutted by the second facing piece 52 of the connecting member 5 connected to the second protrusion 26 of the vertical frame 2, and a second portion 311 located on the stud side. The second protrusion 26 of the vertical frame 2 and the first facing piece 50 of the connecting member 5 are fixed in an overlapping state, and the second facing piece 52 of the connecting member 5 is fixed in an overlapping state to the second facing edge 31 of the opening frame member 3 at the first portion 310, thereby forming a fire compartment. The second portion 311 of the second visible side 31 of the opening frame member 3 is an exposed surface before the second inner board 6B is attached (see FIG. 9).

[0038] [E-2] Fixing structure of upper frame and opening frame material The fixing structure of the upper frame 1 and the opening frame material 3 will be described with reference to Figure 3. A first protrusion 15 and a second protrusion 16 extend facing each other at a distance from the back surface (upper side) of the upper frame 1 of the door frame. When the connecting member 5 is connected to the second protrusion 16 of the upper frame 1, the second visible portion 152 of the first protrusion 15 and the second visible piece 52 of the connecting member 5 face each other at a distance, with the dimension therebetween being approximately the same as the visible width of the opening frame material 3, and the upper frame 1 clamps and fixes the opening frame material 3 from the inside and outside. do.

[0039] The second facing portion 152 of the first projection 15 of the top frame 1 is fixed to the first facing edge 30 with a screw S1 while abutting against the outer surface of the first facing edge 30 of the opening frame material 3. At this time, the first facing surface of the opening frame material 3 formed by the first facing edge 30 consists of a first portion 300 against which the second facing portion 152 of the first projection 15 of the top frame 1 abuts, and a second portion 301 located on the stud side. Since the first portion 300 of the first projection 15 of the top frame 1 is fixed in a state where it overlaps the first facing edge 30 of the opening frame material 3, it is possible to form a fire compartment. The second portion 301 of the first facing edge 30 of the opening frame material 3 is an exposed surface before the first inner board 6A is attached.

[0040] The connecting member 5 is connected to the second protrusion 16 of the top frame 1 with a screw S2, and the second facing piece 52 of the connecting member 5 is fixed to the second facing edge 31 with a screw S3 while abutting the outer surface of the second facing edge 31 of the opening frame material 3. At this time, the second facing surface of the opening frame material 3 formed by the second facing edge 31 consists of a first portion 310 where the second facing piece 52 of the connecting member 5 connected to the second protrusion 16 of the top frame 1 abuts, and a second portion 311 located on the stud side. The second protrusion 16 of the top frame 1 and the first facing piece 50 of the connecting member 5 are fixed in an overlapping state, and the second facing piece 52 of the connecting member 5 is fixed in a state where it overlaps the second facing edge 31 of the opening frame material 3 at the first portion 310, thereby forming a fire compartment. The second portion 311 of the second visible edge 31 of the opening frame member 3 is an exposed surface before the second inner board 6B is attached.

[0041] [E-3] Exterior wall board mounting structure When the upper frame 1 and the left and right vertical frames 2, each consisting of a three-sided frame, are connected to the three-sided frame member 3 for an opening, a step is formed on the outside (the side farther from the opening) of the opening frame on the first side by the first facing portions 150, 250 of the first protrusions 15, 25, the facing portions 151, 251 of the first protrusions 15, 25, and the second facing portions 152, 252 of the first protrusions 15, 25. The step is used to provide the first inner board 6A and the first outer board 7A. On the second side, a step is formed by the first facing portion 50, the facing portion 51, and the second facing portion 52 of the connecting member 5, which is connected to the second protrusions 16, 26 and the second facing edge 31 by screws S2 and S3. The step is used to provide the second inner board 6B and the second outer board 7B.

[0042] [E-3-1] Stud side exterior wall board mounting structure When the vertical frame 2 is connected to the opening frame material 3, a first inner board 6A is provided along the first visible edge 40 (first visible surface) of the stud 4 and the second part 301 of the first visible edge 30 (first visible surface) of the opening frame material 3, and the inner surface of the first inner board 6A abuts against the first visible edge 40 of the stud 4 and the second part 301 of the first visible edge 30 of the opening frame material 3, and the end of the first inner board 6A abuts against or is close to the tip of the second visible part 252 of the first protrusion 25.

[0043] The first outer board 7A is provided adjacent to the first inner board 6A, and the inner surface of the first outer board 7A abuts against the outer surface of the first inner board 6A. The surface of the first outer board 7A extends beyond the end of the first inner board 6A, faces the second visible portion 252 of the first protrusion 25 at a distance, and abuts or is close to the first visible portion 250 of the first protrusion 25, and the end of the first outer board 7A abuts or is close to the first outer visible edge 23 of the vertical jamb 2 of the door frame.

[0044] When the vertical frame 2 is connected to the opening frame material 3, a second inner board 6B is provided along the second visible edge 41 (second visible surface) of the stud 4 and the second part 311 of the second visible edge 31 (second visible surface) of the opening frame material 3, and the inner surface of the second inner board 6B abuts against the second visible edge 41 of the stud 4 and the second part 311 of the second visible edge 31 of the opening frame material 3, and the end of the second inner board 6B abuts against or is close to the tip of the second visible piece 52 of the connecting member 5 connected to the second protrusion 26.

[0045] A second outer board 7B is provided adjacent to the second inner board 6B, and the inner surface of the second outer board 7B abuts against the outer surface of the second inner board 6B. The surface of the second outer board 7B extends beyond the end of the second inner board 6B and faces, at a distance, the second facing piece 52 of the connecting member 5 connected to the second protrusion 26, and abuts or is close to the first facing piece 50 of the connecting member 5, and the end of the second outer board 7B abuts or is close to the second outer facing edge 24 of the vertical jamb 2 of the door frame.

[0046] [E-3-2] Mounting structure of exterior wall board on runner side When the upper frame 1 is connected to the opening frame material 3, a first inner board 6A is provided along the first visible edge 40' (first visible surface) of the runner 4' and the second part 301 of the first visible edge 30 (first visible surface) of the opening frame material 3, and the inner surface of the first inner board 6A abuts the first visible edge 40' of the runner 4' and is close to the second part 301 of the first visible edge 30 of the opening frame material 3, and in the illustrated embodiment, the end of the first inner board 6A abuts or is close to the tip (upper end) of the second visible part 152 of the first protrusion 15.

[0047] The first outer board 7A is provided adjacent to the first inner board 6A, and the inner surface of the first outer board 7A abuts against the outer surface of the first inner board 6A. The surface of the first outer board 7A extends beyond the end of the first inner board 6A, faces the second visible portion 152 of the first protrusion 15 at a distance, and abuts or is close to the first visible portion 150 of the first protrusion 15, and the end of the first outer board 7A abuts or is close to the first outer visible edge 13 of the top jamb 1 of the door frame.

[0048] When the upper frame 1 is connected to the opening frame material 3, a second inner board 6B is provided along the second visible edge 41' (second visible surface) of the runner 4' and the second part 311 of the second visible edge 31 of the opening frame material 3, and the inner surface of the second inner board 6B abuts the second visible edge 41' of the runner 4' and is close to the second part 311 of the second visible edge 31 of the opening frame material 3, and the end of the second inner board 6B abuts or is close to the tip of the second visible piece 52 of the connecting member 5 connected to the second protrusion 16.

[0049] A second outer board 7B is provided adjacent to the second inner board 6B, and the inner surface of the second outer board 7B abuts against the outer surface of the second inner board 6B. The surface of the second outer board 7B extends beyond the end of the second inner board 6B, faces at a distance from the second facing piece 52 of the connecting member 5 connected to the second protrusion 16, and abuts against the first facing piece 50 of the connecting member 5, and the end of the second outer board 7B abuts against or is close to the second outer facing edge 14 of the top frame 1 of the door frame.

[0050] [F] How to fix the door frame and opening frame material [F-1] Fixing the door frame to the opening frame material The following describes how a door frame and an opening frame member 3 are fastened together in this embodiment. A three-sided frame consisting of a top frame 1 and left and right vertical frames 2 is assembled in a factory and transported to the construction site. The structure on the building body side at the construction site consists of a base frame consisting of a runner 4' connecting the left stud 4 and the right stud 4, and a three-sided opening frame member 3 fastened to the base frame. The door frame is attached to the opening frame member 3. With reference to Figure 9, a method for fastening the door frame and the opening frame member 3 will be described based on a method for fastening the vertical frames 2 and the opening frame member 3. The top frame 1 and the vertical frames 2 have the same shape but differ in posture, and the method for fastening the vertical frames 2 and the opening frame member 3 described below can be used to fasten the top frame 1 and the opening frame member 3.

[0051] On the first side, the second facing portion 252 of the first protrusion 25 of the vertical frame 2 is brought into contact with the first facing edge 30 of the opening frame material 3 and fixed with the screw S1. At this time, by adjusting the contact area between the second facing portion 252 of the first protrusion 25 and the first facing edge 30 of the opening frame material 3, the attachment position of the vertical frame 2 in the opening width direction can be adjusted.

[0052] On the second side, the first facing piece 50 of the connecting member 5 is abutted against the outer surface of the second protruding piece 26 of the vertical frame 2 and connected with a screw S2, and the second facing piece 52 of the connecting member 5 is abutted against the second facing edge 31 of the opening frame material 3 and fixed with a screw S3.

[0053] The first visible surface of the opening frame material 3 formed by the first visible edge 30 consists of a first part 300 against which the second visible part 252 of the first protrusion 25 of the vertical frame 2 abuts, and a second part 301 located on the stud side, and the second part 301 is an exposed surface before the first inner board 6A is attached.

[0054] The second visible surface of the opening frame material 3 formed by the second visible edge 31 consists of a first part 310 to which the second visible piece 52 of the connecting member 5 connected to the second protrusion 26 of the vertical frame 2 abuts, and a second part 311 located on the stud side, and the second part 311 is an exposed surface before the second inner board 6B is attached.

[0055] [F-2] Installation of exterior wall boards The installation of the exterior wall boards will be described based on the installation of the exterior wall boards attached to the back side of the vertical frame 2 and the outside of the opening frame member 3 and studs 4. In this embodiment, the projected width of the opening frame member 3 and the projected width of the studs 4 are the same, while the projected width of the opening frame member 3 is slightly smaller than the projected width of the runners 4' (the projected width of the opening frame member 3 is the same on all three sides). However, the upper frame 1 and the vertical frame 2 have the same shape but differ in posture, and the following description of the installation of the exterior wall boards can be applied to the installation of the exterior wall boards attached to the upper side of the upper frame 1 and the outside of the opening frame member 3 and runners 4' (except for the fact that there is a gap between the second portion 301 of the first visible edge 30 of the opening frame member 3 of the upper frame 1 and the first inner board 6A, and the fact that there is a gap between the second portion 311 of the second visible edge 31 of the opening frame member 3 and the second inner board 6B).

[0056] The first visible edge 40 of the stud 4 and the first visible edge 30 (second portion 301) of the opening frame member 3 are flush with each other, and the first inner board 6A is provided with its inner surfaces abutting against the first visible edge 40 of the stud 4 and the second portion 301 of the first visible edge 30 of the opening frame member 3, and its tip abutting against the tip of the second visible portion 252 of the first protruding piece 25. The first inner board 6A does not extend to the overlapping portion of the first portion 300 of the first visible edge 30 and the second visible portion 252 of the first protruding piece 25.

[0057] The outer surface of the first inner board 6A and the first facing portion 250 of the first protrusion 25 are flush with each other, and the inner surface of the first outer board 7A abuts against the outer surface of the first inner board 6A and the first facing portion 250 of the first protrusion 25, with its tip abutting against the first outer facing edge 23 of the vertical frame 2, thereby forming the first outer board 7A. The inner surface of the first outer board 7A faces the second facing portion 252 of the first protrusion 25 at a distance.

[0058] The second facing edge 41 of the stud 4 and the second facing edge 31 (second portion 311) of the opening frame member 3 are flush with each other, and the second inner board 6B is provided by abutting its inner surface against the second facing edge 41 of the stud 4 and the second portion 311 of the second facing edge 31 of the opening frame member 3, and abutting against the tip of the second facing piece 52 of the connecting member 5, the tip of which is connected to the second protrusion 26. The second inner board 6B does not extend to the overlapping portion of the first portion 310 of the second facing edge 31 and the second facing piece 52 of the connecting member 5.

[0059] The outer surface of the second inner board 6B and the first facing piece 50 of the connecting member 5 are flush with each other, and the inner surface of the second outer board 7B abuts against the outer surface of the second inner board 6B and the first facing piece 50 of the connecting member 5, with its tip abutting against the second outer facing edge 24 of the vertical frame 2, thereby providing the second outer board 7B. The inner surface of the second outer board 7B faces the second facing piece 52 of the connecting member 5 at a distance.

[0060] [G] Fixing structure and method for door frame and opening frame material according to another embodiment 10 and 11, a structure and method for fixing a door frame to an opening frame member 3 according to another embodiment will be described based on a structure and method for fixing a vertical frame 2' to an opening frame member. In the other embodiment, the same reference numerals are used for the same components as in the previously described embodiment, and the previously described descriptions can be used for the explanations of elements with the same reference numerals that are not mentioned in this section.

[0061] 4 and 10, the vertical frame 2 and the vertical frame 2' have substantially the same configuration, but in the vertical frame 2', the dimensions of the first outer projected edge 23 and the second outer projected edge 24 extending in the projected direction from the outer end of the second projected surface 21 are larger than the dimensions of the first outer projected edge 23. The connecting member 5' connected to the second protruding piece 26 extending in the projected direction from the second outer projected edge 24 has an L-shaped cross section made up of the projected piece 50' and the projected piece 51', and the projected piece 50' of the connecting member 5' is connected by a screw S2 so as to overlap the outer surface of the second protruding piece 26, and the projected piece 51' of the connecting member 5' is fixed in contact with the projected edge 32 of the opening frame material 3 by a screw S4. The inner surface of the second inner board 6B abuts against the entire second visible edge 31 of the opening frame material 3, and an end abuts against the second outer visible edge 24.

[0062] As shown in Figure 11, the projection piece 51' of the connecting member 5' is abutted against a predetermined position on the projection edge 32 of the opening frame material 3 and fixed with a screw S4, the second protrusion 26 of the vertical frame 2' is abutted against the inner surface of the projection piece 50' of the connecting member 5' and fixed with a screw S2, and the second projection portion 252 of the first protrusion 25 of the vertical frame 2' is abutted against the first projection edge 30 of the opening frame material 3 and fixed with a screw S1. [Explanation of symbols]

[0063] 1 Top frame 10 1st report page 11 2nd page 13 First outer (upper) prospective edge (first outer prospective surface) 14 Second outer (upper) prospective edge (second outer prospective surface) 15 First projection 150 First observation section 151 Prospect 152 Second observation section 16 Second protrusion (first attachment part) 2 Vertical Frame 20 1st report page 21 2nd page 23 First outer prospective edge (first outer prospective surface) 24 Second outer prospective edge (second outer prospective surface) 25 First projection 250 First observation section 251 Prospect 252 Second Detective Section 26 Second protrusion (first attachment part) 3 Opening frame material 30 First visible edge (first visible surface) 300 Part 1 301 Part 2 31 Second facing edge (second facing surface) 310 Part 1 311 Part 2 32 Prospect 4 Studs (base frame material) 40 First visible edge (first visible surface) 41 Second facing edge (second facing surface) 4´ Runner (base frame material) 40´ First visible edge (first visible surface) 41´ Second front edge (second front face) 5 Connecting members 50 First attachment piece (first attachment part) 51 Prospect piece (prospect part) 52 Second attachment piece (second attachment part) 6A First Inner Board 6B Second inner board 7A First outer board 7B Second outer board S1 screw S2 screw S3 screw S4 screw

Claims

1. A fixing structure between a door frame and an opening frame material, A first protrusion and a second protrusion extending in a forward direction are formed on the rear surface of the door frame, The opening frame member has a first visible surface, a second visible surface, and a visible surface, The first protruding piece includes a first visible portion, a visible portion extending from the first visible portion toward the second protruding piece side, and a second visible portion extending from the visible portion toward the opening frame member side in the visible direction, the second facing portion of the first protruding piece is fixed to the first facing surface of the opening frame member with a screw, The second protruding piece is connected to a connecting member with a screw, and the connecting member is fixed to the second visible surface or the visible surface of the opening frame material with a screw. A structure for fixing door frames and opening frame materials.

2. the second protruding piece and the connecting member have shapes that, when connected together, form a first visible portion, a visible portion extending from the first visible portion toward the first protruding piece, and a second visible portion extending from the visible portion toward the opening frame member, The second facing portion is fixed to the second facing surface with a screw. The fixing structure for a door frame and an opening frame member according to claim 1.

3. the second protruding piece is a facing piece, The connecting member includes a first facing piece, a facing piece that forms the facing portion, and a second facing piece that forms the second facing portion, The first projection piece of the connecting member is connected to the second projection piece with a screw, thereby forming the first projection part. The fixing structure for a door frame and an opening frame member according to claim 2.

4. The opening frame member is provided with a base frame member adjacent to the opposite side of the door frame, the base frame member having a first visible surface and a second visible surface, The projected width of the opening frame material and the projected width of the base frame material are the same, the first visible surface of the base frame material and the first visible surface of the opening frame material are flush with each other; The first facing surface of the opening frame member includes a first portion with which the second facing portion of the first protruding piece abuts, and a second portion located on the base frame member side, a first inner board is provided along at least a first facing surface of the base frame; a first outer board adjacent to the first inner board; A fixing structure for a door frame and an opening frame material according to any one of claims 1 to 3.

5. The first protrusion of the door frame is integrally formed from a first outer prospective surface of the rear surface of the door frame, The surface portion of the first outer board abuts or is close to the first visible portion of the first protrusion, and the end portion of the first outer board abuts or is close to the first outer visible surface of the door frame. The fixing structure for a door frame and an opening frame member according to claim 4.

6. the second visible surface of the base frame material and the second visible surface of the opening frame material are flush with each other; The second visible surface of the opening frame member comprises a first portion to which the second visible piece of the connecting member abuts and a second portion located on the base frame member side, A second inner board is provided along at least a second facing surface of the base frame material, a second outer board is provided adjacent to the second inner board; A fixing structure for a door frame and an opening frame material according to any one of claims 4 to 5 (limited to claims dependent on claim 3).

7. The second protrusion of the door frame is integrally formed from a second outer prospective surface of the rear surface of the door frame, The surface portion of the second outer board abuts or is close to the first outer piece of the connecting member, and the end portion of the second outer board abuts or is close to the second outer outer surface of the door frame. The fixing structure for a door frame and an opening frame member according to claim 6.

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