Connector peg for use in door frame, door frame, door structure, and door construction method

Abstract

To provide a connection fitting used for a door frame, the door frame, a door structure and a door construction method, superior in workability and strength, when installing a door on an existing wall.SOLUTION: The connector peg 500 is a connector peg 500 used in the door structure 100 that can be installed in the opening portion OP of the existing wall 10, includes the vertical frame attachment portion 520 attached to the vertical frame portion 210 of the door unit 200, the upper frame attachment portion 510 attached to the upper frame portion 220, and the connecting portion 530 connected to the vertical frame attachment portion 520 and the upper frame attachment portion 520, and is vertically movable along the assembly 215 and / or the assembly 216.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a connector used in a door frame for attaching a door to an existing wall, a door frame, a door structure, and a door installation method. [Background technology]

[0002] For example, Patent Document 1 (JP 2023-079482 A) discloses a door frame fixing structure that does not require on-site welding work and is compatible with reinforced concrete and aluminum alloy structures.

[0003] The door frame fixing structure described in Patent Document 1 is a fixing structure between the door frame and a main body that forms the opening, in which a first connecting member having at least one protrusion extending in the facing direction is provided on the back of the door frame, and a second connecting member having a pair of opposing facing pieces is provided on the main body, and the protrusion of the first connecting member and one of the pair of facing pieces of the second connecting member are fixed with screws in abutting relationship.

[0004] In addition, Patent Document 2 (JP Patent Publication No. 2021-134587) discloses a fixing structure for a door frame and an opening frame material that adjusts the position of the door frame in the forward and backward directions and improves the workability of installing the door frame.

[0005] The fixing structure of a door frame and an opening frame member described in Patent Document 2 is a fixing structure of a door frame and an opening frame member, in which a first facing piece and a second facing piece are provided on the back surface of the door frame, an end face is provided on the back surface of the door frame located between the longitudinal end edges of the first facing piece and the second facing piece, the opening frame member has a first facing surface and a second facing surface, and a base end portion of the first end facing piece of a first end connecting member having a first end facing piece and a first end face is fixed by a screw to the longitudinal end portion of the first facing surface, The base end portion of the second end connecting member, which has a second end end piece and a second end face, is fixed by a screw to the longitudinal end of the attachment face, and the dimension between the tip portions of the first end end piece and the second end piece is larger than the dimension between the first end piece and the second end piece, and the door frame has at least one of the first end face and the second end face fixed to the end face by a screw with the longitudinal ends of the first end piece and the second end piece received between the tip portions of the first end piece and the second end piece. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2023-079482 [Patent Document 2] Japanese Patent Publication No. 2021-134587 Summary of the Invention [Problem to be solved by the invention]

[0007] In the door frame fixing structure described in Patent Document 1, multiple first and second connecting members can prevent the door frame from tipping over in the forward and backward directions, but there is a problem in that the door frame cannot be easily installed by one person because the vertical frame can be used to adjust the angle and fix it, and the upper frame can be moved up and down along the vertical frame.

[0008] Furthermore, in the door frame fixing structure described in Patent Document 2, the upper portion of the door frame is clamped from the first side and the second side between the first end end piece of the first end connecting member and the second end end piece of the second end connecting member, and the position can be adjusted using wedges or the like, but there is a problem in that after the door frame, which is temporarily fixed using multiple wedges, is fixed to the opening frame member, the multiple wedges must be removed. Also, there is a problem in that the door frame cannot be easily installed by one person.

[0009] An object of the present invention is to provide a connector, door frame, door structure, and door installation method for use in a door frame that is easy to install and has excellent strength when attaching a door to an existing wall. Another object of the present invention is to provide a connector, door frame, door structure, and door installation method for use in a door frame that have excellent design when attaching a door to an existing wall. [Means for solving the problem]

[0010] (1) According to one aspect, a connecting fitting used in a door frame is a connecting fitting used in a door frame that can be installed in an opening in an existing wall, and is equipped with a vertical frame mounting portion that is attached to the vertical frame of the door frame, an upper frame mounting portion that is attached to the upper frame, and a connecting portion that connects to the vertical frame mounting portion and the upper frame mounting portion, and is capable of moving up and down along the vertical frame.

[0011] In the past, when attaching a door to an existing wall, the construction method was to attach a head frame to the opening, then a pair of vertical frames, and then the door itself. In this case, at least two people were required to install the head frame, one to support it and one to secure it in place. In addition, when installing the door frame, the positioning relationship between the head frame and the pair of vertical frames had to be precise, otherwise the door would not open or close properly.

[0012] The connecting fittings used in a door frame according to one aspect allow the upper frame mounting portions of the connecting fittings to be fixed to both ends of the upper frame and moved up and down along the vertical frame, so that the door frame can be installed by one person. This allows the projected surface material to be inserted at an angle into the opening of the door frame, and then by standing the projected surface material upright, the connecting fittings attached to the upper frame can be slid upward along the vertical frame, and the upper frame can be lifted and fixed, so that the door frame can be installed by one person, resulting in excellent workability. Furthermore, the connecting fittings can fix the vertical frame and the upper frame together, making the door frame highly resistant to deformation, and the door less prone to problems opening and closing even after long-term use.

[0013] (2) The connecting fittings used in the door frame of the second invention are connecting fittings used in the door frame according to one aspect, and the connecting portion may be capable of engaging with the engaging portion of the vertical frame to prevent the upper frame from falling.

[0014] This allows the upper frame to be supported by fastening the upper frame mounting parts of the connecting fittings to both ends of the upper frame and engaging the connecting fittings with the vertical frame. Therefore, even when installing the door frame by one person, the upper frame can be prevented from falling, resulting in excellent workability and safety.

[0015] (3) The connecting fittings used in the door frame of the third invention are connecting fittings used in the door frame according to one aspect, wherein the vertical frame mounting portion has vertical frame fixing holes that can be fixed to the vertical frame with screws, the upper frame mounting portion has upper frame fixing holes that can be fixed to the upper frame with screws, and the vertical frame fixing holes and upper frame fixing holes may be arranged perpendicular to the thickness direction of the existing wall.

[0016] This allows the vertical frame mounting section to be fixed with screws perpendicular to the thickness of the existing wall, and the upper frame mounting section to be fixed with screws perpendicular to the thickness of the existing wall. Therefore, the vertical frame and upper frame can be fixed together using the connecting fittings, which provides excellent strength against deformation, and because the screws are not visible from the inside of the room, a door with excellent design can be installed.

[0017] (4) The connecting fittings used in the door frame of the fourth invention are connecting fittings used in a door frame according to one aspect, in which the vertical frame mounting portion and the upper frame mounting portion are arranged vertically, and the connecting portion is formed in a U-shaped cross section and is arranged to protrude in a direction perpendicular to the vertical frame.

[0018] The vertical frame mounting portion and upper frame mounting portion of the connecting fittings are arranged vertically, making it easy to fix the vertical frame and upper frame vertically as a single unit even when installing by one person, resulting in a door frame that is easy to install and strong, and is less likely to cause problems when opening and closing. In addition, the U-shaped connecting part is positioned so that it protrudes perpendicular to the vertical frame, so by engaging with the vertical frame engaging part of the vertical frame, the upper frame can be stably supported. Therefore, construction can be carried out safely even by a single worker. Furthermore, since the connecting part is U-shaped, it can easily slide vertically along the vertical frame, so the door frame can be installed by one person, resulting in a door frame with excellent workability.

[0019] (5) A door frame according to another aspect is a door frame that can be installed in an opening in an existing wall, the door frame including a pair of vertical frames and an upper frame, the vertical frames including a wall rail fixed to the opening, a receiving member that can be fitted with the wall rail, and a projection surface material that is arranged to cover the receiving member, and the receiving member can be fixed to the wall rail so that the angle can be adjusted relative to the wall rail.

[0020] Existing walls constructed inside buildings do not always have openings that are precisely perpendicular. Also, openings in existing walls may become distorted over time. In a door frame according to another aspect, even if the opening in the existing wall is not formed vertically, the receiving member can be installed vertically by adjusting the clearance (degree of fit) between the wall rail and the receiving member. Therefore, a pair of vertical frames can be installed parallel to each other, making it easy to install a door frame with an accurate rectangular shape. In addition, since the projecting surface material is positioned to cover the receiving member, the metal fittings are not visible from inside the room, resulting in a door frame with excellent design.

[0021] (6) The door frame of the sixth invention is a door frame according to another aspect, further including connecting fittings that connect the vertical frames and the upper frame, and the pair of vertical frames consists of a front vertical frame and a base vertical frame, the front vertical frame and the base vertical frame being arranged in parallel, and the base vertical frame may be equipped with a rotation axis to which the door body can be rotatably fixed.

[0022] This allows the pair of vertical frames to be installed parallel to each other, resulting in a door frame with a precise rectangular shape, which makes it less likely for the door to open or close. Furthermore, the door frame is fixed together with a precise rectangular shape through the connecting hardware, making it highly resistant to distortion and less likely to cause problems. The rotation axis may include a hinge or a pivot hinge.

[0023] (7) A door structure according to another aspect includes a connector used in a door frame according to the one aspect, a door frame according to the other aspect, and a door body attached to the door frame.

[0024] This allows for a door that is easy to install, has excellent strength, and is also aesthetically pleasing.

[0025] (8) According to yet another aspect, there is provided a door installation method for installing a door in an opening in an existing wall, the door installation method including: a wall rail fixing step of fixing a wall rail to a side wall of the opening; a vertical adjustment step of fitting a receiving member to the wall rail and fixing the receiving member so that it is vertical; a fitting installation step of attaching connecting fittings to an upper frame; a placement step of placing the upper frame with the attached connecting fittings on a pair of wall rails or receiving members; and an erection step of inserting a projecting surface material into the opening at an angle and erecting the projecting surface material to lift the upper frame.

[0026] The vertical alignment process allows the vertical frame to be installed vertically even against an existing wall, and the connecting fittings allow the vertical frame and upper frame to be fixed vertically and integrally. The upper frame can be supported by engaging the connecting hardware to which the upper frame is connected with the engaging part of the vertical frame. Furthermore, by abutting one end of the projection panel against the upper frame or the connecting hardware and lifting the upper frame, the upper frame is held perpendicular to the pair of vertical frames, eliminating the need to support the upper frame and allowing one person to install the door frame. Therefore, a door can be constructed that is easy to install, has excellent strength, and has an excellent design. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a schematic plan view showing an example of a door structure for attaching a door unit to an existing wall according to the present embodiment. FIG. [Figure 2] FIG. 1 is a schematic perspective view showing an example of a connector fitting of a door structure. [Figure 3] 3 is a schematic perspective view showing an example of the structure of the connector fitting shown in FIG. 2. FIG. [Figure 4] 3 is a schematic assembly diagram showing an example of the connector shown in FIG. 2. FIG. [Figure 5] 10 is a schematic perspective view showing an example of the relationship between the connecting fittings and the upper frame portion and the vertical frame portion. FIG. [Figure 6] FIG. 10 is a schematic diagram showing an example of an assembly for attaching a vertical frame when installed. [Figure 7] FIG. 10 is a schematic perspective view showing an example of a state in which a connecting fitting is fixed to an upper frame. [Figure 8] FIG. 10 is a schematic perspective view showing an example of a state in which the connecting fitting and the upper frame are attached to the assembly. [Figure 9] FIG. 10 is a schematic perspective view showing an example of a state in which a vertical frame is attached. [Figure 10] This is a schematic cross-sectional view showing the relationship between the assembly and the assembled object, the vertical frame, and the door body in the existing wall. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same components are designated by the same reference numerals. Furthermore, when the reference numerals are the same, the names and functions of the components are also the same. Therefore, detailed descriptions thereof will not be repeated.

[0029] [Embodiment] (Description of door structure) 1 is a schematic plan view showing an example of a door structure 100 for attaching a door unit 200 to an existing wall 10 according to this embodiment. Specifically, the existing wall 10 in this embodiment is an LGS (Light Gauge Steel: JIS A 6517) wall or the like.

[0030] As shown in FIG. 1, the door structure 100 according to this embodiment has an opening OP formed in an existing wall 10, and a door unit 200 and a door body 250 formed in the opening OP. The door unit 200 includes a vertical frame portion 210, an upper frame portion 220, and hinges 260. In other words, the door unit 200 includes what is called a three-sided door frame jamb.

[0031] (Explanation of Connector 500) Fig. 2 is a schematic perspective view showing an example of a connector 500 of the door structure 100, and Fig. 3 is a schematic perspective view showing an example of the structure of the connector 500 shown in Fig. 2. Also, Fig. 4 is a schematic assembly diagram showing the example of the connector 500 shown in Fig. 2.

[0032] As shown in FIGS. 2 and 3, the connector 500 includes an upper frame mounting portion 510, a vertical frame mounting portion 520, a connecting portion 530, a vertical frame plate 540, and an upper frame plate 550.

[0033] 3(a), the connecting fitting 500 is integrally formed with an upper frame mounting portion 510, a vertical frame mounting portion 520, and a connecting portion 530. A mounting hole 515 is formed in the upper frame mounting portion 510, and a mounting hole 525 is formed in the vertical frame mounting portion 520. The upper frame mounting portion 510 and the vertical frame mounting portion 520 are formed so as to be perpendicular when viewed from the side. A connecting portion 530 is provided between the upper frame mounting portion 510 and the vertical frame mounting portion 520. The connecting portion 530 is formed in a U-shape when viewed from the side. In other words, the connecting portion 530 extends the upper frame mounting portion 510 further from the intersection position between the relative upper frame mounting portion 510 and the vertical frame mounting portion 520, bends downward, communicates with the vertical frame mounting portion 520 in the direction opposite to the extension direction, and is connected to the vertical frame mounting portion 520. In other words, the connecting portion 530 is formed to have a U-shaped cross section, and is formed so as to protrude in a direction perpendicular to the longitudinal direction toward the assembly 215 side, which will be described later.

[0034] 3(b), the upper frame plate 550 has a concave shape that can hold the upper frame portion 220. Furthermore, as shown in FIG. 3(c), the vertical frame plate 540 has a U-shape that can engage with the vertical frame portion 210. The relationship between the upper frame plate 550 and the upper frame portion 220, and the relationship between the vertical frame plate 540 and the vertical frame portion 210 will be described later.

[0035] Next, as shown in Fig. 4, the connecting fitting 500 has the upper frame plate 550 attached to the back side of the upper frame mounting portion 510, and the vertical frame plate 540 attached to the back side of the vertical frame mounting portion 520. As a result, the connecting fitting 500 shown in Fig. 2 can be obtained. In this case, the attachment may be by screw fastening or by adhesive. In this embodiment, the connecting fitting 500 is assembled from a member consisting of the upper frame mounting portion 510, the vertical frame mounting portion 520, and the connecting portion 530, and the vertical frame plate 540 and the upper frame plate 550. However, this is not limited to this, and the connecting fitting 500 may be formed from a single metal member. In this case, although manufacturing costs increase, component management costs can be reduced.

[0036] (Connection status of connector 500) FIG. 5 is a schematic perspective view showing an example of the relationship between the connector fitting 500 and the upper frame portion 220 and the vertical frame portion 210. As shown in FIG. As shown in Figure 5, the connecting fittings 500 are provided at the connection positions of the upper frame portion 220 and the vertical frame portion 210, i.e., at the upper corners of the door unit 200. That is, although Figure 5 shows only one side of the door structure 100, the same fittings are provided on the other side of the door structure 100.

[0037] As shown in FIG. 5, an upper frame mounting portion 510 of a connecting fitting 500 and an upper frame plate 550 are arranged inside an upper frame portion 220, which is shown hatched at a 45-degree angle to the lower right. Similarly, the vertical frame mounting portion 520 of the connecting fitting 500 and the vertical frame plate 540 are arranged inside the vertical frame portion 210, which is shown hatched at 45 degrees to the lower left.

[0038] In this case, the upper frame portion 220 and the two vertical frame portions 210 in the door structure 100 can work together to support the closing force of the door body 250. As a result, the durability of the door structure 100 can be improved.

[0039] (Construction procedure for door structure 100) Next, the construction procedure for the door structure 100 will be explained. FIG. 6 is a schematic diagram showing an example of a state in which an assembly 215 for attaching the vertical frame portion 210 is attached.

[0040] As shown in Figure 6, in the door structure 100, one assembly 215 is fixed with screws to the vertical wall of the opening OP. In this case, the assembly 215 is preferably arranged to extend vertically, but it is often the case that it is deviated from the vertical by several degrees. This is because the opening OP of the existing wall 10 constructed in the building is not always formed exactly vertically, and the opening OP of the existing wall 10 may become distorted over time. In this embodiment, the assembled part 216 extending in the vertical direction is attached to the assembly 215. As a result, by adjusting the clearance (degree of fit) between the assembly 215 and the assembled part 216, the assembled part 216 can be installed vertically.

[0041] Furthermore, the upper end of assembly 215 is provided with a partial notch 215b so that connecting portion 530 of connecting fitting 500, which will be described later, can be inserted. This allows connecting portion 530 of connecting fitting 500 to be inserted from the side of assembly 215, and connecting portion 530 to be inserted inside vertically slidable concave member 215a of assembly 215. As a result, connecting fitting 500 can only move in the vertical sliding direction. Furthermore, assembly 215 and / or assembled portion 216 are formed with support shape 216a that allows connecting portion 530 to slide up and down a predetermined distance, i.e., supports connecting portion 530 to prevent it from falling vertically downward.

[0042] FIG. 7 is a schematic perspective view showing an example of a state in which the connector fitting 500 is fixed to the upper frame portion 220. As shown in FIG.

[0043] 7, the connecting fittings 500 are attached to both ends of the upper frame portion 220. In this case, the upper frame plate 550 of the connecting fittings 500 is fastened to the upper frame portion 220 with screws. In this embodiment, the position where the connecting fitting 500 and the upper frame portion 220 are screwed together is different from the opening and closing surface of the door body 250, i.e., the mounting hole 515 (see Figure 3) is located perpendicular to the thickness direction of the existing wall 10, and the screw head is located at that position, thereby improving the design.

[0044] 8 is a schematic perspective view showing an example of the state in which the connector fitting 500 and the upper frame 220 are attached to the assembly 215. (a) shows the state immediately before the connector fitting 500 and the upper frame 220 are attached to the assembly 215, (b) is a schematic enlarged view of the relationship between the connector fitting 500 and the assembly 215 in (a), and (c) is a schematic enlarged view showing an example of the state in which the connector fitting 500 has been moved in the direction of arrow DW relative to the assembly 215 (up and down slidable and locked state).

[0045] As shown in FIG. 8(a), the connector fitting 500 and the upper frame portion 220 are inserted into the door structure 100 to which the assembly 215 and the assembly to be assembled 216 are attached. In this case, the connector fitting 500 and the upper frame portion 220 can be easily inserted through the partial cutout 215b of the assembly 215. That is, as shown in Figure 8(b), with upper frame 220 and connecting fitting 500 integrated, connecting portion 530 of connecting fitting 500 is inserted through partial cutout 215b of assembly 215 between vertically slidable members 215a, and as shown in Figure 8(c), by moving it in the direction of arrow DW (see (b)), connecting portion 530 of connecting fitting 500 is locked by assembly 215 and assembled member 216. In this case, the lower part of connecting portion 530 is supported by support shape 216a.

[0046] Naturally, the opposite end of upper frame portion 220 has the same structure. Therefore, an installation worker can perform these operations by himself by attaching connecting fittings 500 to upper frame portion 220 and both ends of upper frame portion 220 to form an integrated member, and then inserting and locking connecting portions 530 of the integrated member into assemblies 215. Even if the worker releases his / her hands from the upper frame 220, the connecting portion 530 is locked to the assembly 215 and / or the assembled unit 216, so the worker will not fall and can begin another construction project. Also, the shortage of construction workers is an issue, and being able to work alone can alleviate this shortage.

[0047] FIG. 9 is a schematic perspective view showing an example of a state in which the vertical frame portion 210 is attached.

[0048] As shown in Figure 9, the tip of the vertical frame portion 210 is brought into contact between the upper frame portion 220 and the connecting fitting 500, and the vertical frame portion 210 is moved in the direction of arrow CL1. In this case, the upper frame portion 220 and the connecting fitting 500 slide vertically upward in the direction opposite to the arrow DW described in Figure 8(b).

[0049] At the other end of the upper frame portion 220, since there is a distance between them, the connecting fitting 500 is maintained in a state of being locked to the assembly 215 and the assembly target 216. After moving in the direction of arrow CL1, the vertical frame portion 210 is moved in the direction of arrow CL2 to erect the vertical frame portion 210 and fix the vertical frame portion 210 to the assembled portion 216. In addition, the connecting fitting 500 and the vertical frame portion 210 are screwed together. In this embodiment, the position where the connecting fitting 500 and the vertical frame portion 210 are screwed together is different from the opening and closing surface of the door body 250, i.e., the mounting hole 525 (see Figure 3) is located perpendicular to the thickness direction of the existing wall 10, and the screw head is located at that position, thereby improving the design.

[0050] Next, as with the door tip side described above, the vertical frame part 210 is inserted diagonally at the door base side and erected, so that the upper frame part 220 is held and fixed horizontally above the opening. In this case, the construction can be carried out by a single worker.

[0051] Finally, FIG. 10 is a schematic cross-sectional view showing the relationship between the assembly 215, the assembled object 216, the vertical frame portion 210, and the door body 250 in the existing wall 10.

[0052] As shown in Fig. 10, an assembly 215 is attached to the existing wall 10. Next, a target assembly 216 is attached to the assembly 215 so as to extend vertically. Finally, the vertical frame portion 210 is attached to the target assembly 216. As shown in Fig. 10, the target assembly 216 may have a burr escape portion 217 formed in the center. As a result, the vertical frame portion 210 can be securely attached in the vertical direction to the assembly 216 arranged in the vertical direction without removing burrs or deformations caused by processing such as countersunk screws.

[0053] Furthermore, the vertical frame portion 210 is positioned to cover the screw portion of the assembly 216 for fixing the assembly 215 and the assembly 216, so the screw heads are not visible from the outside, resulting in a door structure 100 with excellent design.

[0054] In the present invention, the existing wall 10 corresponds to the "existing wall", the opening OP corresponds to the "opening", the connector 500 corresponds to the "connector used in a door frame", the vertical frame mounting portion 520 corresponds to the "vertical frame mounting portion", the upper frame mounting portion 510 corresponds to the "upper frame mounting portion", the connecting portion 530 corresponds to the "connecting portion", the vertical frame portion 210, the assembly 215 and the assembled portion 216 correspond to the "vertical frame", the upper frame portion 220 corresponds to the "upper frame", and the mounting hole 525 corresponds to the "vertical frame fixing hole". The mounting hole 515 corresponds to the "upper frame fixing hole", the assembly 215 corresponds to the "wall rail", the assembled part 216 corresponds to the "receiving member", the vertical frame part 210 corresponds to the "prospective surface material", the hinge 260 corresponds to the "rotating axis", the door body 250 corresponds to the "door body", the door structure 100 corresponds to the "door structure", the vertically slidable member 215a and / or the support shape 216a correspond to the "engagement part", and the door unit 200 corresponds to the "door frame".

[0055] Although the preferred embodiment of the present invention has been described above, the present invention is not limited thereto. It will be understood that various other embodiments can be made without departing from the spirit and scope of the present invention. Furthermore, although the actions and effects of the configuration of the present invention are described in the present embodiment, these actions and effects are merely examples and do not limit the present invention. [Explanation of symbols]

[0056] 10: Existing wall 100: Door structure 200: Door unit 210: Vertical frame section 215: Assembly 215a: Up and down slidable member 216: Assembled 216a: Support shape 220: Upper frame part 250: Door body 260: Hinge 500: Connection fittings 515: Mounting hole 525: Mounting hole 530:Connection part 540: Vertical frame plate 550: Upper frame plate OP: Opening

Claims

1. <Connection fittings> A connector used in a door frame that can be installed in an opening in an existing wall, a vertical frame mounting portion that is attached to a vertical frame of the door frame; an upper frame mounting portion that is attached to the upper frame; A connecting portion that connects the vertical frame mounting portion and the upper frame mounting portion, A connector used in a door frame that can move up and down along the vertical frame.

2. 2. The connector used in a door frame according to claim 1, wherein the connecting portion is capable of engaging with an engaging portion of the vertical frame to hold the upper frame so as not to fall.

3. The vertical frame mounting portion has a vertical frame fixing hole that can be fixed to the vertical frame with a screw, the upper frame mounting portion has an upper frame fixing hole that can be fixed to the upper frame with a screw, The connector used in a door frame according to claim 1, wherein the vertical frame fixing hole and the upper frame fixing hole are arranged perpendicular to the thickness direction of the existing wall.

4. The vertical frame mounting portion and the upper frame mounting portion are arranged vertically, 2. The connector used in a door frame according to claim 1, wherein the connecting portion has a U-shaped cross section and is disposed so as to protrude in a direction perpendicular to the vertical frame.

5. <Door frame> A door frame that can be installed in an opening in an existing wall, The door frame includes a pair of vertical frames and a top frame, The vertical frame includes a wall rail fixed to the opening, a receiving member that can be fitted with the wall rail, and a prospective surface material that is arranged to cover the receiving member, The receiving member can be fixed to the wall rail so that the angle thereof can be adjusted.

6. <Door frame + hardware> Further included are connecting fittings that connect the vertical frame and the upper frame, The pair of vertical frames comprises a door-end vertical frame and a door-base vertical frame, The door-end side vertical frame and the door-base side vertical frame are arranged in parallel, The door frame according to claim 5, wherein the door base vertical frame is provided with a rotation shaft to which the door body can be rotatably fixed.

7. <Whole door> A door structure comprising: a connector used for a door frame according to claim 1; a door frame according to claim 5; and a door body attached to the door frame.

8. <Construction method> A door installation method for installing a door in an opening in an existing wall, a wall rail fixing step of fixing a wall rail to a side wall of the opening; a vertical alignment step of fitting a receiving member to the wall rail and fixing the receiving member so that the receiving member is vertical; a fitting attachment process of attaching a connecting fitting to the upper frame; a placing step of placing the upper frame to which the connecting fittings are attached on the pair of wall rails or the receiving members; A door installation method including an erection process of inserting a projection surface material into the opening at an angle and erecting the projection surface material to lift the upper frame.

Images