Frame connecting member, door frame, construction method of door frame and fitting

Abstract

To enable a worker to easily and independently perform the construction of door frames, even though they are large sized.SOLUTION: A frame connecting member 10 used for connecting a first vertical frame 1 and an upper frame 3 of a door frame 5 installed at an opening O includes: a plate-like fixing portion 11 fixed to the first vertical frame 1; a plate-like base portion 12 that extends to the left and right from the fixing portion 11 and contacts the upper surface of the upper frame 3; and engagement protrusions 13,13 that protrude downward from the lower surface of the base portion 12 and fit into recesses 7, 7 formed on the upper surface of the upper frame 3. When the fixing portion 11 is fixed to the first vertical frame 1 installed at the opening O, the engagement protrusions 13, 13 fit into the recesses 7, 7 of the upper frame 3, positioning the upper frame 3 at a predetermined connection position, enabling vertical connection with the first vertical frame 1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a door frame connecting member, a door frame, a door frame construction method, and building materials. [Background technology]

[0002] Conventionally, three-sided or four-sided frames each having at least one pair of vertical frames and an upper frame have been used as door frames for fittings such as sliding doors and hinged doors. These door frames are often assembled and framed in advance before being installed in the opening because there is a risk of misalignment if each frame material (vertical frame, upper frame, lower frame) is installed separately in the opening (for example, see Patent Document 1 below).

[0003] Patent Document 1 discloses a door frame that can be quickly and easily framed at the construction site by embedding nuts in one of the vertical and horizontal frames and forming a bolt insertion hole in the other, and simply screwing the bolt inserted into the insertion hole into the nut. With such a door frame, since it is installed in the opening while it is already framed, there is no need to align the vertical and upper frames at a high place, and the door frame can be easily installed in the opening. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-36735 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the opening is tall or wide and large fittings are used, it is necessary to use a large door frame (a tall or wide door frame), and there is not enough space near the opening to frame the door frame, so it may not be possible to frame it before construction. Also, when using a large door frame, even if the work of framing it on the floor can be done by one person, it is difficult to lift the framed large door frame and place it in the opening and install it by one person. In other words, if the large door frame is installed in the opening after the framing, there are cases where it is not possible to do the work by one person.

[0006] The present invention has been made in consideration of the above-mentioned points, and its object is to enable a worker to easily install a door frame by himself, even if the door frame is large. [Means for solving the problem]

[0007] In order to achieve the above-mentioned objective, in the present invention, when installing a door frame in an opening, a door frame connecting member is used in the installation of the door frame, which is fixed to the first vertical frame that is installed first in the opening and guides the upper frame that is installed later to a predetermined connecting position.

[0008] Specifically, the first invention is a door frame connecting member for connecting a first vertical frame and an upper frame of a door frame to be installed in an opening, the door frame comprising at least first and second vertical frames arranged with a gap between them and extending in the up-down direction, and an upper frame extending in the left-right direction and vertically connecting the upper ends of the first and second vertical frames, the door frame connecting member comprising a plate-shaped fixing portion fixed to the first vertical frame, a plate-shaped base continuous with the fixing portion, extending in the left-right direction and abutting the upper surface of the upper frame, and an engaging protrusion protruding downward from the lower surface of the base and fitting into a recess formed in the upper surface of the upper frame, the door frame connecting member being configured such that when the engaging protrusion is fitted into the recess of the upper frame with the fixing portion fixed to the first vertical frame installed in the opening, the upper frame is positioned at a predetermined connecting position where it can be vertically connected to the first vertical frame.

[0009] In the first invention, the door frame connecting member configured as above is used to vertically connect the first vertical frame and the upper frame, which are installed in the opening before the upper frame, in a vertical direction. By fixing the fixing part of such a door frame connecting member to the upper end part of the first vertical frame, when the upper frame is installed after the first vertical frame is installed, the plate-shaped base of the door frame connecting member is arranged so as to extend in the extension direction (left and right direction) of the upper frame above the planned installation location of the upper frame. Therefore, by simply arranging the upper frame so that the engagement protrusion protruding downward from the lower surface of the base fits into the recess formed on the upper surface of the upper frame, the upper frame can be easily arranged (positioned) at a predetermined connection position where it can be vertically connected to the first vertical frame. In other words, by using the door frame connecting member, even if each frame material of the door frame is installed individually in the opening, the first vertical frame and the upper frame can be easily connected vertically in a vertical direction without misalignment. If the first vertical frame and the upper frame can be connected vertically, the second vertical frame and the upper frame can then be easily connected vertically without misalignment. Therefore, by using the door frame connecting member according to the first invention, even if the door frame is large, a worker can easily install it in the opening by himself.

[0010] The second invention is characterized in that, in the first invention, the engagement protrusion is formed in a tapered shape that becomes thinner from the base end to the tip end, and the side edge on the fixed portion side in the left-right direction is inclined so as to approach the fixed portion as it moves from the tip end to the base end.

[0011] In the door frame connecting member according to the second invention, the engaging protrusion is formed in a tapered shape, and the side edge of the engaging protrusion on the fixed part side is inclined so as to approach the fixed part as it moves from the tip side to the base end side. Therefore, when constructing the upper frame after constructing the first vertical frame, it is necessary to engage the engaging protrusion with the recess in a position that is difficult for the worker to see. When the recess formed on the upper surface of the upper frame is pushed upward so that it roughly faces the engaging protrusion, the inner wall of the recess of the upper frame abuts against the inclined side edge of the engaging protrusion, and when the upper frame is further pushed up, the upper frame is guided diagonally upward by the inclined side edge of the engaging protrusion so as to approach the fixed part as it moves upward, and eventually the upper surface abuts against the lower surface of the base and the end surface reaches a predetermined connecting position where it abuts perpendicularly against the inner surface of the first vertical frame. Therefore, according to the above door frame connecting member, the engaging protrusion and the recess can be easily engaged in a position that is difficult for the worker to see, so that the upper frame can be more easily positioned in the predetermined connecting position. Therefore, when the door frame connecting member according to the second aspect of the present invention is used in installing a door frame, even a large door frame can be installed in an opening by a single worker more easily.

[0012] A third invention is characterized in that in the second invention, the engagement projection is formed so that a cross section thereof is circular.

[0013] In the door frame connecting member according to the third invention, the cross section of the engaging protrusion is circular and has no corners, so when the upper frame is pushed upward to engage the engaging protrusion with the recess on the upper surface of the upper frame in order to install the upper frame, the corners of the engaging protrusion do not get caught on the inner wall of the recess. Therefore, with the above door frame connecting member, the engagement work of the engaging protrusion and the recess, which is performed in a position that is difficult for the worker to see, can be performed more easily and smoothly. Therefore, by using the door frame connecting member according to the third invention, even if the door frame is large, a worker can install it in an opening more easily and smoothly by himself.

[0014] A fourth invention is the first invention, characterized in that the base portion is perpendicularly continuous with the fixed portion.

[0015] In the fourth aspect of the present invention, the door frame connecting member is formed in an L-shape with a plate-shaped fixing portion and a plate-shaped base portion that is perpendicular to the fixing portion. With this type of door frame connecting member, after the door frames are installed, the fixing portion is aligned with the first vertical frame and the base portion is aligned with the upper frame, so that the joint angle between the first vertical frame and the upper frame can be kept perpendicular even after installation.

[0016] The fifth invention is characterized in that, in the first invention, it further comprises a blocking portion that protrudes downward from the lower surface of the base and fits into the upper end of a groove formed on the inner surface of the first vertical frame, extending from the upper end to the lower end, thereby blocking the upper end of the groove.

[0017] In the fifth invention, the door frame connecting member is provided with a blocking portion that fits into the upper end of a groove such as a door shim groove or a door stop groove formed on the inner surface of the first vertical frame from the upper end to the lower end. Therefore, according to the above door frame connecting member, when fixing to the first vertical frame, the door frame connecting member can be easily fixed to a desired position of the first vertical frame by fitting the blocking portion into the upper end of the groove. Also, when a groove extending from the upper end to the lower end is formed on the inner surface of the first vertical frame, in a door frame in which the vertical frame and the upper frame are vertically connected, the upper end of the groove remains open and the body of the outer periphery of the door frame is visible, so a separate member for blocking the upper end of the groove is required. However, according to the above door frame connecting member, since it is provided with a blocking portion, the upper end of the groove extending from the upper end to the lower end formed on the inner surface of the first vertical frame can be easily blocked by simply providing the door frame connecting member without providing a separate blocking member.

[0018] The sixth invention is a door frame installed in an opening, comprising at least first and second vertical frames arranged with a gap between them and extending in the up-down direction, and an upper frame extending in the left-right direction and vertically connecting the upper ends of the first and second vertical frames, further comprising a door frame connecting member according to any one of the first to fifth inventions, wherein the first vertical frame and the upper frame are connected using the door frame connecting member, and the second vertical frame and the upper frame are connected without using the door frame connecting member.

[0019] In the door frame according to the sixth invention, the door frame connecting member is used to vertically connect the first vertical frame and the upper frame, which are installed in the opening before the upper frame, in a vertical direction, and the second vertical frame, which is installed in the opening after the upper frame, is connected to the upper frame without using the door frame connecting member. By using the door frame connecting member, the first vertical frame and the upper frame can be easily connected vertically, and if the first vertical frame and the upper frame can be connected vertically, the second vertical frame and the upper frame can be easily connected vertically in a vertical direction without misalignment even without using the door frame connecting member. Therefore, in the door frame according to the sixth invention, the door frame connecting member is used only when connecting the first vertical frame and the upper frame, which are installed first. Therefore, according to the door frame according to the sixth invention, even if it is a large one, by connecting the first vertical frame and the upper frame using the door frame connecting member, a worker can easily install it in the opening by himself.

[0020] The seventh invention is a door frame construction method for constructing a door frame, which includes at least first and second vertical frames arranged with a gap between them and extending in the up-down direction, and an upper frame extending in the left-right direction and vertically connecting the upper ends of the first and second vertical frames, in an opening, and is characterized by comprising a fixing step of fixing the fixing portion of the door frame connecting member according to any one of the first to fifth inventions to the upper end of the first vertical frame, a first vertical frame construction step of constructing the first vertical frame in the opening after the fixing step, an upper frame construction step of arranging the upper frame in the predetermined connection position where the engagement protrusion of the door frame connecting member fits into the recess formed on the upper surface of the upper frame and constructing it in the opening, and a second vertical frame construction step of constructing the second vertical frame in the opening so that it is vertically connected to the upper frame after the upper frame construction step.

[0021] In the seventh invention, when a door frame having at least the first and second vertical frames and the upper frame is installed in an opening, the fixing part of the door frame connecting member is fixed to the upper end of the first vertical frame that is installed in the opening first, and then the first vertical frame is installed in the opening, so that the plate-shaped base part continuous with the fixing part is arranged so as to extend in the extension direction (left and right direction) of the upper frame above the planned installation location of the upper frame. Therefore, the upper frame can be easily arranged (positioned) at a predetermined connection position where it can be vertically connected to the first vertical frame simply by arranging the upper frame so that the engagement protrusion protruding downward from the lower surface of the base fits into the recess formed on the upper surface of the upper frame. In other words, if the door frame connecting member is used, the first vertical frame and the upper frame can be easily connected vertically to the vertical frame without misalignment, even if each frame material of the door frame is installed individually in the opening. Also, if the first vertical frame and the upper frame can be vertically connected, the second vertical frame and the upper frame can be easily connected vertically to the vertical frame without misalignment thereafter. Therefore, according to the door frame construction method of the seventh invention, even in the case of a large door frame, by connecting the first vertical frame and the upper frame using the door frame connecting member, a worker can easily construct the door frame in an opening by himself / herself.

[0022] The eighth invention is a door frame construction method for constructing a door frame, which includes at least first and second vertical frames arranged with a gap between them and extending in the up-down direction, and an upper frame extending in the left-right direction and vertically connecting the upper ends of the first and second vertical frames, into an opening, the method comprising the steps of: a first vertical frame construction step of constructing the first vertical frame into the opening; a fixing step of fixing the fixing portion of the door frame connecting member of the fifth invention to a groove bottom surface of a groove extending from the upper end to the lower end formed on the inner surface of the first vertical frame after the first vertical frame construction step; an upper frame construction step of arranging the upper frame at the predetermined connecting position where the engagement protrusion of the door frame connecting member fits into the recess formed on the upper surface of the upper frame after the fixing step, and constructing the upper frame into the opening; and a second vertical frame construction step of constructing the second vertical frame into the opening so that it is vertically connected to the upper frame after the upper frame construction step.

[0023] In the eighth invention, when a door frame having at least a first and second vertical frames and an upper frame is installed in an opening, first, the first vertical frame is installed in the opening, and then the fixing part of the door frame connecting member is fixed to the upper end of the first vertical frame. As a result, the plate-shaped base part continuing from the fixing part is arranged so as to extend in the extension direction (left and right direction) of the upper frame above the planned installation location of the upper frame. Therefore, the upper frame can be easily arranged (positioned) at a predetermined connecting position where it can be connected vertically to the first vertical frame simply by arranging the upper frame so that the engagement protrusion protruding downward from the lower surface of the base fits into the recess formed on the upper surface of the upper frame. In other words, by using the door frame connecting member, even if each frame material of the door frame is installed individually in the opening, the first vertical frame and the upper frame can be easily connected vertically to the vertical frame without misalignment. Also, if the first vertical frame and the upper frame can be connected vertically, the second vertical frame and the upper frame can be easily connected vertically to the vertical frame without misalignment thereafter. Therefore, according to the door frame construction method of the eighth invention, even in the case of a large door frame, by connecting the first vertical frame and the upper frame using the door frame connecting member, a worker can easily construct the door frame in an opening by himself / herself.

[0024] A ninth aspect of the present invention is a fixture having the door frame according to the sixth aspect of the present invention.

[0025] According to the ninth aspect of the present invention, even in the case of large building fixtures, by connecting the first vertical frame and the upper frame of the door frame using the door frame connecting member as described above, a worker can easily install it in the opening by himself / herself. Effect of the Invention

[0026] As described above, according to the present invention, when installing a door frame in an opening, a door frame connecting member is used which is fixed to the first vertical frame which is installed first in the opening and guides the upper frame which is installed later to a predetermined connecting position, so that even a large door frame can be easily installed in an opening by a worker alone. [Brief description of the drawings]

[0027] [Figure 1]FIG. 1 is a front view showing a fixture having a door frame installed using the door frame connecting member according to the first embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a state before connection of the connecting portions of the first vertical frame and the top frame which are connected using the door frame connecting member according to the first embodiment of the present invention. [Diagram 3] FIG. 3 is an explanatory diagram of a fixing step in the door frame construction method according to the first embodiment of the present invention. [Figure 4] FIG. 4 is an explanatory diagram of the upper frame construction step of the door frame construction method according to the first embodiment of the present invention. [Diagram 5] FIG. 5 is an explanatory diagram of a fixing step in a door frame construction method according to the second embodiment of the present invention. [Figure 6] FIG. 6 is an explanatory diagram of an upper frame construction step of a door frame construction method according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its uses.

[0029] First Embodiment of the Invention FIG. 1 is a front view showing an example of a fitting 50 equipped with a door frame 5 constructed using a door frame connecting member 10 according to the first embodiment of the present invention. In this first embodiment, an example will be described in which the fitting 50 is a sliding door equipped with two hanging doors d1, d2. For ease of explanation, the left side, right side, upper side, and lower side of FIG. 1 will be described as "left", "right", "upper", and "lower", respectively. Also, the near side in the direction perpendicular to the paper surface of FIG. 1 will be described as "front", and the far side as "rear".

[0030] As shown in Fig. 1, the wall W is a wall with a large wall structure, and an opening O is provided with left and right pillars A, A (structure) provided within the wall W, a lintel B (structure) horizontally disposed between the left and right pillars A, A, and a pair of wall base materials C, C provided in front and behind the left and right pillars A, A and the lintel B. A door frame 5 is provided in the opening O, and doors d1, d2 that open and close the entrance framed by the door frame 5 are provided in the door frame 5. In this embodiment 1, the doors d1, d2 are composed of two sliding hanging doors that are attached inside the door frame 5 so as to be slidable in the left and right direction and open and close the entrance framed by the door frame 5.

[0031] The door frame 5 is a three-sided frame including a pair of vertical frames 1, 2 arranged at a distance from each other and extending in the vertical direction, and an upper frame 3 extending in the horizontal direction and vertically connecting the upper ends of the vertical frames 1, 2. Details will be described later, but in this embodiment 1, the door frame 5 is provided in the opening O by installing each frame member 1-3 individually in order to the opening O, rather than installing the frame members 1-3 constituting the door frame 5 in a framed state. In addition, when installing the door frame 5, a door frame connecting member 10 is used to connect the first vertical frame 1 installed in the opening O first and the upper frame 3 installed next among the three frame members 1-3. On the other hand, the door frame connecting member 10 is not used to connect the second vertical frame 2 installed in the opening O after the upper frame 3 and the upper frame 3. In other words, the door frame connecting member 10 is provided only on one side of the door frame 5.

[0032] A pair of vertical frames 1, 2 is composed of a first vertical frame 1 installed at the left end of the opening O and a second vertical frame 2 installed at the right end of the opening O. The first and second vertical frames 1, 2 are composed of wooden plate-like members. The first and second vertical frames 1, 2 are formed with a vertical length that is approximately equal to the height of the opening O (the distance between the floor surface F and the lower surface of the lintel B), and are fixed to the left and right pillars A, A, respectively. In this embodiment 1, the first and second vertical frames 1, 2 have a door groove 4 (see FIG. 2) on the inner surface (the back surface of the outer surface fixed to the pillar A) into which the door ends of the doors d1, d2 fit. The door groove 4 has a rectangular cross section and is formed from the upper end to the lower end of the first and second vertical frames 1, 2.

[0033] The upper frame 3 is made of a wooden plate-like member. The upper frame 3 extends in the left-right direction and vertically connects the upper ends of the first and second vertical frames 1, 2. As shown in FIG. 2, a groove 6 with a rectangular cross section is formed on the lower surface of the upper frame 3 from the left end to the right end. Although not shown in FIG. 2, a rail for hanging the hanging doors d1, d2 is embedded in the groove 6 of the upper frame 3. In addition, recesses 7, 7 into which the engagement protrusions 13, 13 of the door frame connecting member 10 fit are formed on the upper surface of the upper frame 3. The recesses 7, 7 are formed at a predetermined distance (about 1.5 to 20 cm) from the left end of the left end connected to the first vertical frame 1 of the upper frame 3, with a gap in between in the front-rear direction. The recesses 7, 7 may be formed in one or three or more, but it is preferable to provide two recesses in order to position the upper frame 3 accurately and easily. The recesses 7,7 have a shape substantially equal to the outer shape of the engaging protrusions 13,13 so that the engaging protrusions 13,13 of the door frame connecting member 10 can be fitted into the recesses 7,7. Specifically, the recesses 7,7 are formed so that when the engaging protrusions 13,13 are fitted into the recesses 7,7, the outer surface of the engaging protrusions 13,13 abuts against the inner surface of the recesses 7,7 over the entire circumference.

[0034] [Door frame connecting parts] 2, the door frame connecting member 10 includes a plate-shaped fixing portion 11, a plate-shaped base portion 12, two engaging protrusions 13, 13, and a blocking portion 14. In the present embodiment 1, the door frame connecting member 10 is made of metal (aluminum, copper, stainless steel, etc.), but may be made of any material, even resin, as long as it has sufficient strength to prevent deformation when connecting the door frame 5. In the present embodiment 1, the fixing portion 11, the base portion 12, the engaging protrusions 13, 13, and the blocking portion 14 are integrally formed.

[0035] Both the fixed part 11 and the base part 12 are rectangular flat plate members. The fixed part 11 and the base part 12 are vertically connected to form an L shape. In an installed state where the door frame 5 is installed in the opening O, the fixed part 11 is a vertical plate part extending in the front-rear direction and the up-down direction, and the base part 12 is a horizontal plate part extending in the front-rear direction and the left-right direction. In the following explanation, unless otherwise specified, the door frame connecting member 10 in the installed state will be explained.

[0036] The fixed portion 11 and the base 12 are formed to have the same thickness. The fixed portion 11 and the base 12 are equal in length in the front-to-rear direction, while the vertical length of the fixed portion 11 is formed to be shorter than the horizontal length of the base 12. The vertical length of the fixed portion 11 and the base 12 is equal to or shorter than the vertical length of the first vertical frame 1 and the upper frame 3. The dimensions of the fixed portion 11 and the base 12 are not limited to those described above. The vertical length of the fixed portion 11 may be equal to or longer than the horizontal length of the base 12, provided that it does not interfere with the construction hole (not shown) of the first vertical frame 1.

[0037] The fixing part 11 is a rectangular flat plate member whose vertical length is shorter than its front-rear length. The fixing part 11 is formed with insertion holes 11v, 11v for inserting screws v1, v1 when fixing the door frame connecting member 10 to the first vertical frame 1. The insertion holes 11v, 11v are circular holes, and two of them are formed at the vertical center of the fixing part 11 with a gap between them in the front-rear direction. The fixing part 11 is fixed to the first vertical frame 1 by the screws v1, v1 inserted into the insertion holes 11v, 11v with its right side surface (inner surface) abutting against the outer surface (surface facing the pillar A) of the first vertical frame 1.

[0038] The base 12 is a rectangular flat plate member whose left-right length is longer than its front-rear length. The base 12 is continuous with the upper end of the fixed part 11 and extends perpendicularly to the fixed part 11 to the second vertical frame 2 side in the left-right direction (direction away from the first vertical frame 1). In the installed state, the lower surface of the base 12 abuts against the upper end surface (end surface) of the first vertical frame 1 and the upper surface of the upper frame 3.

[0039] The engagement protrusion 13 is formed so as to protrude downward from the lower surface of the base 12. Two engagement protrusions 13 are provided at a position to the right of the center in the left-right direction of the base 12, spaced apart in the front-rear direction. Each engagement protrusion 13 is formed in a tapered shape in which the area of ​​the cross section becomes smaller from the upper base end side toward the lower tip end side. Also, the left edge 13a in the left-right direction (side edge 13a on the fixed part 11 side) of the engagement protrusion 13 is formed in a shape that is inclined so as to approach the fixed part as it moves from the tip end side toward the base end side. In this embodiment 1, the engagement protrusion 13 is formed so that the cross section is circular, and more specifically, the engagement protrusion 13 is a truncated cone whose centers of the top and bottom faces are shifted in the left-right direction and arranged upside down. In this embodiment 1, the engagement protrusion 13 is formed so that the right edge 13b in the left-right direction (side edge 13b opposite to the fixed part 11) extends vertically.

[0040] The blocking portion 14 is formed so as to protrude downward from the lower surface of the base portion 12. The blocking portion 14 is provided at a position to the left (the fixed portion 11 side) of the center in the left-right direction of the base portion 12. The blocking portion 14 is formed in a rectangular parallelepiped shape having a rectangular cross-sectional shape equal to the cross-sectional shape of the door clearance groove 4. The blocking portion 14 is provided at a position where it fits into the upper end of the door clearance groove 4 of the first vertical frame 1 when the inner surface of the fixed portion 11 is abutted against the outer surface of the first vertical frame 1 and the fixed portion 11 is fixed to the first vertical frame 1 with screws v1, v1. When the fixed portion 11 of the door frame connecting member 10 is fixed to the first vertical frame 1, the blocking portion 14 fits into the upper end of the door clearance groove 4 to block the upper end of the door clearance groove 4.

[0041] - Door frame construction method - In the present embodiment 1, the door frame 5 is provided in the opening O by installing each of the frame materials 1 to 3 individually in the opening O, rather than installing the frame materials (first vertical frame 1, second vertical frame 2, upper frame 3) that make up the door frame 5 in a framed state in the opening O. In the present embodiment 1, the door frame 5 is provided in the opening O by installing the first vertical frame 1, the upper frame 3, and the second vertical frame 2 in this order. Specifically, in the present embodiment 1, the door frame installation method includes a fixing step S1, a first vertical frame installation step S2, an upper frame installation step S3, and a second vertical frame installation step S4.

[0042] First, a fixing step S1 is performed to fix the door frame connecting member 10 to the first vertical frame 1 (see FIG. 3). The door frame connecting member 10 is placed at a fixing position where the inner surface of the fixing portion 11 abuts against the outer surface of the first vertical frame 1, the lower surface of the base portion 12 abuts against the upper end surface of the first vertical frame 1, and the blocking portion 14 fits into the upper end of the door clearance groove 4. At the fixing position, screws v1, v1 are driven toward the first vertical frame 1 so as to pass through insertion holes 11v, 11v of the fixing portion 11, thereby fixing the fixing portion 11 (door frame connecting member 10) to the first vertical frame 1.

[0043] After the fixing step S1, a first vertical frame installation step S2 is performed in which the first vertical frame 1 is installed in the opening O. The first vertical frame 1 is placed on the inside (right side) of the left pillar A of the opening O so that a fence (not shown) is sandwiched between them, and the first vertical frame 1 is fixed to the pillar A by driving screws (not shown) into multiple places in the door groove 4 of the first vertical frame 1.

[0044] After the first vertical frame construction step S2, the upper frame construction step S3 is performed to construct the upper frame 3 in the opening O. First, the upper frame 3 is placed at a predetermined connection position where it can be connected vertically to the first vertical frame 1 (see FIG. 4). Specifically, since the fixing part 11 of the door frame connection member 10 is fixed to the upper end part of the first vertical frame 1, when the upper frame 3 is constructed after the construction of the first vertical frame 1, the plate-shaped base part 12 of the door frame connection member 10 is arranged so as to extend in the extension direction (left-right direction) of the upper frame 3 above the planned installation location of the upper frame 3. When the upper frame 3 is arranged so that the engagement protrusions 13, 13 protruding downward from the lower surface of the base part 12 of the door frame connection member 10 fit into the recesses 7, 7 formed on the upper surface of the upper frame 3, the upper frame 3 is placed at a predetermined connection position where it can be connected vertically to the first vertical frame 1.

[0045] In this embodiment 1, the engagement protrusions 13, 13 are formed in a tapered shape, and the side edges 13a, 13a of the engagement protrusions 13, 13 on the fixed part 11 side are inclined so as to approach the fixed part 11 as they move from the tip side to the base end side. Therefore, when the recesses 7, 7 formed on the upper surface of the upper frame 3 are roughly opposed to the engagement protrusions 13, 13 and the upper frame 3 is pushed upward, the inner wall of the recesses 7, 7 of the upper frame 3 abuts against the inclined side edges 13a, 13a of the engagement protrusions 13, 13, and when the upper frame 3 is further pushed up, the upper frame 3 is guided diagonally upward (diagonally upward to the left in FIG. 1) by the inclined side edges 13a, 13a of the engagement protrusions 13, 13 so as to approach the fixed part 11 as it moves upward, and eventually the upper surface abuts against the lower surface of the base 12 and the end surface reaches a predetermined connecting position where it abuts perpendicularly against the inner surface of the first vertical frame 1.

[0046] After the top frame 3 is arranged (positioned) at the predetermined connecting position as described above, the top frame 3 is fixed to the lintel B by driving screws (not shown) upward into multiple locations in the groove 6 formed in the underside of the top frame 3. Furthermore, in this embodiment 1, the top frame 3 is also fixed to the first vertical frame 1 by driving screws v2 diagonally upward (diagonally upward to the left in FIG. 1) into the groove 6 formed in the underside of the top frame 3 so as to reach the first vertical frame 1.

[0047] After the upper frame construction step S3, a second vertical frame construction step S4 is performed in which the second vertical frame 2 is constructed in the opening O. The second vertical frame 2 is arranged on the inside (left side) of the pillar A on the right side of the opening O so that the end surface of the upper frame 3 abuts against the inside surface (left side) of the upper end, and a stud (not shown) is sandwiched between the pillar A and the second vertical frame 1, and the second vertical frame 1 is fixed to the pillar A by driving screws (not shown) into multiple places in the door groove 4 of the second vertical frame 2. If the first vertical frame 1 and the upper frame 3 can be connected vertically, the second vertical frame 2 and the upper frame 3 can be connected vertically to the vertical edge by arranging and constructing the second vertical frame 2 so that the inside surface of the upper end abuts against the end surface of the upper frame 3, so that the second vertical frame 2 and the upper frame 3 are connected vertically to the vertical edge, and the second vertical frame 2 and the upper frame 3 can be easily connected vertically to the vertical edge without using the door frame connection member 10.

[0048] -Effects of embodiment 1- In this embodiment 1, in order to vertically connect the first vertical frame 1, which is installed in the opening O before the upper frame 3, and the upper frame 3, a door frame connecting member 10 is used, which is provided with a plate-shaped fixing portion 11, a plate-shaped base 12 extending in the left-right direction continuous with the fixing portion 11, and engaging protrusions 13, 13 that protrude downward from the underside of the base 12 and fit into recesses 7, 7 formed on the upper surface of the upper frame 3, and is configured so that when the engaging protrusions 13, 13 are fitted into the recesses 7, 7 with the fixing portion 11 fixed to the first vertical frame 1 installed in the opening O, the upper frame 3 is positioned at a predetermined connecting position where it can be vertically connected to the first vertical frame 1. By fixing the fixing portion 11 of the door frame connecting member 10 to the upper end of the first vertical frame 1, when the upper frame 3 is constructed after the first vertical frame 1 is constructed, the plate-shaped base 12 of the door frame connecting member 10 is arranged so as to extend in the extension direction (left and right direction) of the upper frame 3 above the planned installation location of the upper frame 3, and the upper frame 3 can be easily arranged (positioned) at a predetermined connection position where it can be vertically connected to the first vertical frame 1 simply by arranging the upper frame 3 so that the engagement protrusions 13, 13 protruding downward from the lower surface of the base 12 fit into the recesses 7, 7 formed on the upper surface of the upper frame 3. In other words, by using the door frame connecting member 10, even if each frame material 1 to 3 of the door frame 5 is constructed individually in the opening O, the first vertical frame 1 and the upper frame 3 can be easily connected vertically to the vertical edge without misalignment. If the first vertical frame 1 and the upper frame 3 can be connected vertically, the second vertical frame 2 and the upper frame 3 can then be easily connected vertically to the vertical edge without misalignment. Therefore, when the door frame connecting member 10 of the present embodiment 1 is used, even if the door frame 5 is large, a worker can easily install it in the opening O by himself.

[0049] In addition, according to the door frame connecting member 10 of this embodiment 1, the engagement protrusions 13, 13 are formed in a tapered shape, and the side edge 13a of the engagement protrusions 13, 13 on the fixed portion 11 side is inclined so as to approach the fixed portion 11 as it moves from the tip side to the base end side. Therefore, when constructing the upper frame 3 after constructing the first vertical frame 1, it is necessary to engage the engagement protrusions 13, 13 with the recesses 7, 7 at a position that is difficult for the worker to see, but when the recesses 7, 7 formed on the upper surface of the upper frame 3 are roughly opposed to the engagement protrusions 13, 13 and the upper frame 3 is pushed upward, the inner wall of the recesses 7, 7 of the upper frame 3 abuts against the inclined side edges 13a, 13a of the engagement protrusions 13, 13, and when the upper frame 3 is further pushed up, the inclined side edges of the engagement protrusions guide the upper frame 3 obliquely upward so as to approach the fixing part 11 as it moves upward, and eventually the upper surface abuts against the lower surface of the base 12 and the end surface reaches a predetermined connecting position where it abuts perpendicularly against the inner surface of the first vertical frame 1. Therefore, according to the above-mentioned door frame connecting member 10, the engagement protrusions 13, 13 and the recesses 7, 7 can be easily engaged at a position that is difficult for the worker to see, so that the upper frame 3 can be more easily arranged at the predetermined connecting position. Therefore, when the door frame connecting member 10 of embodiment 1 is used to install the door frame 5, even if the door frame 5 is large, a worker can install it in the opening O more easily by himself.

[0050] Furthermore, according to the door frame connecting member 10 of the present embodiment 1, the cross section of the engaging projections 13, 13 is circular and has no corners, so that when the upper frame 3 is pushed upward to engage the engaging projections 13, 13 with the recesses 7, 7 on the upper surface of the upper frame 3 in order to install the upper frame 3, the corners of the engaging projections 13, 13 do not get caught on the inner wall of the recesses 7, 7. Therefore, according to the above door frame connecting member 10, the engagement work of the engaging projections 13, 13 and the recesses 7, 7, which is performed in a position that is difficult for the worker to see, can be performed more easily and smoothly. Therefore, by using the above door frame connecting member 10, even if the door frame 5 is large, the worker can install the door frame 5 in the opening O more easily and smoothly by himself.

[0051] Furthermore, in the first embodiment, the door frame connecting member 10 is formed in an L-shape with a plate-like fixing portion 11 and a plate-like base portion 12 that is continuous perpendicularly to the fixing portion 11. With such a door frame connecting member 10, after the door frame 5 is constructed, the fixing portion 11 is aligned with the first vertical frame 1 and the base portion 12 is aligned with the upper frame 3, so that the joint angle between the first vertical frame 1 and the upper frame 3 can be kept perpendicular even after construction.

[0052] In addition, in this embodiment 1, the door frame connecting member 10 is provided with a blocking portion 14 that fits into the upper end of the door frame groove 4 formed on the inner surface of the first vertical frame 1 from the upper end to the lower end. Therefore, according to the door frame connecting member 10, when fixing to the first vertical frame 1 (in the fixing step S1), the blocking portion 14 is fitted into the upper end of the door frame groove 4, so that the door frame connecting member 10 can be easily fixed to the desired position of the first vertical frame 1. Also, when the door frame groove 4 is formed on the inner surface of the first vertical frame 1, in the door frame 5 in which the vertical frames 1, 2 and the upper frame 3 are vertically connected, the upper end of the door frame groove 4 remains open and the frame around the outer periphery of the door frame 5 is visible, so a separate member for blocking the upper end of the door frame groove 4 is required. However, according to the door frame connecting member 10, since it is provided with the blocking portion 14, the upper end of the door frame groove 4 can be easily blocked by simply providing the door frame connecting member 10 without providing a separate blocking member.

[0053] In addition, in the door frame 5 of the present embodiment 1, the door frame connecting member 10 is used to vertically connect the first vertical frame 1 and the upper frame 3, which are installed in the opening O before the upper frame 3, in a vertically-adjusted manner, and the second vertical frame 2, which is installed in the opening O after the upper frame 3, is connected to the upper frame 3 without using the door frame connecting member 10. If the door frame connecting member 10 is used, the first vertical frame 1 and the upper frame 3 can be easily connected vertically, and if the first vertical frame 1 and the upper frame 3 can be connected vertically, the second vertical frame 2 and the upper frame 3 can be easily connected vertically in a vertically-adjusted manner without misalignment even without using the door frame connecting member 10. Therefore, in the door frame 5, the door frame connecting member 10 is used only when connecting the first vertical frame 1 and the upper frame 3, which are installed first. Therefore, according to the door frame 5 of the present embodiment 1, even if it is a large one, by connecting the first vertical frame 1 and the upper frame 3 using the door frame connecting member 10, a worker can easily install it in the opening O by himself.

[0054] In the door frame construction method of the present embodiment 1, when constructing the door frame 5 having at least the first and second vertical frames 1, 2 and the upper frame 3 in the opening O, the fixing portion 11 of the door frame connecting member 10 is first fixed to the upper end portion of the first vertical frame 1 to be constructed in the opening O first, and then the first vertical frame 1 is constructed in the opening O, so that the plate-shaped base 12 continuous with the fixing portion 11 is disposed so as to extend in the extension direction (left-right direction) of the upper frame 3 above the planned installation location of the upper frame 3. Therefore, by simply arranging the upper frame 3 so that the engagement protrusions 13, 13 protruding downward from the lower surface of the base 12 fit into the recesses 7, 7 formed in the upper surface of the upper frame 3, the upper frame 3 can be easily disposed (positioned) in a predetermined connection position where it can be vertically connected to the first vertical frame 1. In other words, by using the door frame connecting member 10, even if each frame material 1 to 3 of the door frame 5 is individually installed in the opening O, the first vertical frame 1 and the upper frame 3 can be easily connected vertically without misalignment. Also, if the first vertical frame 1 and the upper frame 3 can be connected vertically, the second vertical frame 2 and the upper frame 3 can be easily connected vertically without misalignment. Therefore, according to the door frame installation method of the present embodiment 1, even if the door frame 5 is large, by connecting the first vertical frame 1 and the upper frame 3 using the door frame connecting member 10, a worker can easily install the door frame 5 in the opening O by himself.

[0055] Second Embodiment of the Invention In the second embodiment, a door frame connecting member 10 having a shape partially different from that of the first embodiment is used for construction of a door frame 5. Specifically, as shown in Figs. 5 and 6, the width of the fixing portion 11 in the front-rear direction of the door frame connecting member 10 in the second embodiment is narrower than that of the first embodiment, and the fixing portion 11 is formed to have a length equal to or less than the width of the door frame groove 4 in the front-rear direction so as to fit into the door frame groove 4 of the first vertical frame 1. In the second embodiment, the fixing portion 11 is formed with only one insertion hole 11v for inserting a screw v1 when fixing the door frame connecting member 10 to the first vertical frame 1. In the second embodiment, a blocking portion 14 is provided in the corner formed by the fixing portion 11 and the base portion 12, and blocks the upper end of the door frame groove 4 together with the fixing portion 11. The other configurations are the same as those of the first embodiment, so detailed explanations are omitted.

[0056] - Door frame construction method - In the second embodiment as well, the door frame 5 is provided in the opening O by individually installing each of the frame materials 1-3 in the opening O in the order of the first vertical frame 1, the upper frame 3, and the second vertical frame 2, rather than installing the frame materials (first vertical frame 1, second vertical frame 2, upper frame 3) that make up the door frame 5 in a framed state in the opening O. Specifically, in the second embodiment, the door frame installation method includes a first vertical frame installation step S11, a fixing step S12, an upper frame installation step S13, and a second vertical frame installation step S14.

[0057] In the second embodiment, first, a first vertical frame construction step S11 is performed to construct the first vertical frame 1 in the opening O. The first vertical frame 1 is placed on the inside (right side) of the left pillar A of the opening O so that a stalk (not shown) is sandwiched between them, and the first vertical frame 1 is fixed to the pillar A by driving screws (not shown) into multiple places in the door groove 4 of the first vertical frame 1.

[0058] After the first vertical frame construction step S11, a fixing step S12 is performed to fix the door frame connecting member 10 to the first vertical frame 1 (see FIG. 5). The door frame connecting member 10 is arranged at a fixing position where the outer surface of the fixing part 11 abuts against the bottom surface of the door clearance groove 4 formed on the inner surface of the first vertical frame 1, the lower surface of the base part 12 abuts against the upper end surface of the first vertical frame 1, and the closing part 14 fits into the upper end of the door clearance groove 4. At the fixing position, the screw v1 is driven toward the first vertical frame 1 so as to pass through the insertion hole 11v of the fixing part 11, thereby fixing the fixing part 11 (door frame connecting member 10) to the first vertical frame 1.

[0059] After the fixing step S12, a top frame construction step S13 is performed in which the top frame 3 is constructed in the opening O. The top frame construction step S13 is similar to the top frame construction step S3 in the first embodiment, and will not be described in detail. However, after the top frame 3 is placed in a predetermined connection position where it can be vertically connected to the first vertical frame 1 (see FIG. 6), the top frame 3 is fixed to the lintel B by driving screws (not shown) upward into multiple locations in the groove 6 formed on the bottom surface of the top frame 3. Also, in the second embodiment, the top frame 3 is also fixed to the first vertical frame 1 by driving the screws v2 diagonally upward (diagonally upward to the left in FIG. 1) into the groove 6 formed on the bottom surface of the top frame 3 so as to reach the first vertical frame 1.

[0060] After the upper frame construction step S13, a second vertical frame construction step S14 is performed in which the second vertical frame 2 is constructed in the opening O. The second vertical frame construction step S14 is similar to the second vertical frame construction step S4 in the first embodiment, and therefore a detailed description thereof will be omitted.

[0061] Even if the door frame 5 is installed in the opening O using the door frame connecting member 10 of the second embodiment, the same effects as those of the first embodiment can be achieved.

[0062] According to the door frame construction method of the second embodiment, when constructing the door frame 5, which includes at least the first and second vertical frames 1, 2 and the upper frame 3, in the opening O, the first vertical frame 1 is first constructed in the opening O, and then the fixing portion 11 of the door frame connecting member 10 is fixed to the upper end of the first vertical frame 1. As a result, the plate-shaped base 12, which is continuous with the fixing portion 11, is disposed above the planned installation location of the upper frame 3, so as to extend in the extension direction (left-right direction) of the upper frame 3. Therefore, by simply disposing the upper frame 3 so that the engagement protrusions 13, 13 protruding downward from the lower surface of the base 12 fit into the recesses 7, 7 formed on the upper surface of the upper frame 3, the upper frame 3 can be easily disposed (positioned) in a predetermined connection position where it can be vertically connected to the first vertical frame 1. In other words, by using the door frame connecting member 10, even if each frame material 1 to 3 of the door frame 5 is individually installed in the opening O, the first vertical frame 1 and the upper frame 3 can be easily connected vertically without misalignment. Also, if the first vertical frame 1 and the upper frame 3 can be connected vertically, the second vertical frame 2 and the upper frame 3 can be easily connected vertically without misalignment. Therefore, according to the door frame installation method of the second embodiment, even if the door frame 5 is large, by connecting the first vertical frame 1 and the upper frame 3 using the door frame connecting member 10, a worker can easily install the door frame 5 in the opening O by himself.

[0063] In the second embodiment, the fixing step S12 is carried out after the first vertical frame construction step S11. However, when the door frame connecting member 10 of the second embodiment is used for constructing the door frame 5, the first vertical frame construction step of constructing the first vertical frame 1 to the opening O may be carried out after the fixing step of fixing the fixing portion 11 of the door frame connecting member 10 to the upper end of the first vertical frame 1, as in the first embodiment.

[0064] Other Embodiments In the above-mentioned first and second embodiments, the door frame 5 having a three-sided frame has been described, but the door frame 5 according to the present invention may have at least the first and second vertical frames 1, 2 arranged at a distance from each other on the left and right, and the upper frame 3 that vertically connects the upper ends of the first and second vertical frames 1, 2, and may have a four-sided frame. Furthermore, the fitting 50 is not limited to the sliding door shown in the first and second embodiments, but may be a sliding door or a hinged door. When the fitting 50 is a hinged door, a door stop groove is formed in the door frame 5 instead of the door stop groove 4, and the blocking portion 14 is formed so as to fit into the upper end of the door stop groove, so that the door frame connecting member 10 can be easily positioned at the fixing position for fixing the first vertical frame 1.

[0065] In the above-mentioned first and second embodiments, the door frame connecting member 10 is provided with the blocking portion 14, but the blocking portion 14 may not be provided. If the door frame 5 does not have a groove such as a door shim groove 4 or a door stop groove, the body of the outer periphery of the door frame 5 cannot be seen from the groove, so the blocking portion 14 is not required, and a door frame connecting member 10 without the blocking portion 14 may be used. Even if the door frame 5 has a groove such as a door shim groove 4 or a door stop groove, a door frame connecting member 10 without the blocking portion 14 may be used, and a blocking member for blocking the upper end of the groove may be provided separately from the door frame connecting member 10. Also, as in the first and second embodiments, if the upper end of the groove such as the door shim groove 4 or the door stop groove is blocked by the base 12 even without the blocking portion 14, a door frame connecting member 10 without the blocking portion 14 may be used without providing a blocking member separately.

[0066] In particular, in the configuration in which the fixing part 11 fits into the door groove 4 as in the second embodiment, if the width of the fixing part 11 in the front-to-rear direction is formed to a length that fits snugly into the door groove 4, then simply fitting the fixing part 11 into the door groove 4 makes it possible to easily position the fixing part 11 in the front-to-rear direction at the desired fixed position when fixing the door frame connecting member 10 to the first vertical frame 1. Therefore, in the above case, the fixing part 11 plays a role in positioning the blocking part 14, and the base part 12 plays a role in blocking the upper end of the door groove 4 of the blocking part 14, so that the blocking part 14 does not need to be provided.

[0067] In the above first and second embodiments, the fixed portion 11 and the base portion 12 are vertically connected to each other to form an L-shape, but the fixed portion 11 and the base portion 12 may be connected to each other on the same plane. In that case, the fixed portion 11 can be fixed to the upper end surface (butt end surface) of the first vertical frame 1 by screws or the like.

[0068] Furthermore, the fixing portion 11 and the base portion 12 of the door frame connecting member 10 may be plate-like bodies having a certain degree of strength, and may not be rectangular in shape. For example, the base portion 12 may have no other portions as long as the fixing portion 11 and the portion from which the blocking portion 14 protrudes are continuous, and the portion from which the blocking portion 14 protrudes is continuous with the portion from which the engaging projections 13, 13 protrude.

[0069] In addition, one of the fixed part 11 and the base part 12 of the door frame connecting member 10 may be composed of a plurality of plate-like bodies, and the fixed part 11 or the base part 12 composed of a plurality of plate-like bodies may be continuous with the base part 12 or the fixed part 11 composed of a single plate-like body. For example, the fixed part 11 may be composed of two plate-like bodies each having an insertion hole 11v, and in the case where the fixing part 11 does not have the blocking part 14, the base part 12 may be composed of two plate-like bodies each having an engagement protrusion 13 protruding therefrom.

[0070] In the above first and second embodiments, the fixing portion 11 of the door frame connecting member 10 is fixed to the first vertical frame 1 with the screw v1, but the means for fixing the fixing portion 11 to the first vertical frame 1 is not limited to the screw v1, and bolts and nuts may be used. In the above first and second embodiments, a screw hole may be pre-drilled at the location of the first vertical frame 1 where the screw v1 is to be driven. [Industrial Applicability]

[0071] The present invention is useful for door frame connecting members, door frames, door frame construction methods, and building fixtures. [Explanation of symbols]

[0072] 1 First vertical frame 2. Second vertical frame 4. Tojakuri Groove (Groove) 5 Door frame 7 Recess 10 Door frame connecting members 11 Fixed part 12 Base 13 Engagement protrusion 13a Left edge (side edge) 14 Occlusion 50 Doors and windows

Claims

1. A door frame connecting member for connecting the first vertical frame and the upper frame of a door frame to be installed in an opening, the door frame including at least first and second vertical frames arranged at an interval to the left and right and extending in the up-down direction, and an upper frame extending in the left-right direction and vertically connecting the upper ends of the first and second vertical frames, A plate-shaped fixing portion fixed to the first vertical frame; a plate-shaped base portion that is continuous with the fixing portion, extends in the left-right direction, and abuts against an upper surface of the upper frame; an engagement protrusion that protrudes downward from the lower surface of the base and fits into a recess formed in the upper surface of the upper frame; When the fixing portion is fixed to the first vertical frame installed in the opening, the engaging projection is fitted into the recess of the upper frame, so that the upper frame is arranged at a predetermined connecting position where it can be connected vertically to the first vertical frame. A door frame connecting member characterized by:

2. The door frame connecting member according to claim 1, The engagement projection is formed in a tapered shape that becomes thinner from the base end side toward the tip end side, and the side edge on the fixed portion side in the left-right direction is inclined so as to approach the fixed portion from the tip end side toward the base end side. A door frame connecting member characterized by:

3. The door frame connecting member according to claim 2, The engagement projection is formed so that its cross section is circular. A door frame connecting member characterized by:

4. The door frame connecting member according to claim 1, The base portion is perpendicular to and continuous with the fixed portion. A door frame connecting member characterized by:

5. The door frame connecting member according to claim 1, The base further includes a blocking portion that protrudes downward from the lower surface of the base and fits into an upper end of a groove formed on the inner surface of the first vertical frame from the upper end to the lower end, thereby blocking the upper end of the groove. A door frame connecting member characterized by:

6. A door frame constructed in an opening, comprising at least first and second vertical frames arranged at an interval to the left and right and extending in the up-down direction, and an upper frame extending in the left-right direction and vertically connecting the upper ends of the first and second vertical frames, The door frame connecting member according to any one of claims 1 to 5 is further provided, The first vertical frame and the upper frame are connected using the door frame connecting member, The second vertical frame and the upper frame are connected without using the door frame connecting member. A door frame characterized by:

7. A method for constructing a door frame in an opening, the method comprising: first and second vertical frames arranged at a distance from each other and extending in a vertical direction; and an upper frame extending in the horizontal direction and vertically connecting upper ends of the first and second vertical frames; A fixing step of fixing the fixing portion of the door frame connecting member according to any one of claims 1 to 5 to the upper end portion of the first vertical frame; After the fixing process, a first vertical frame construction process of constructing the first vertical frame in the opening; After the first vertical frame construction step, the upper frame is placed at the predetermined connection position where the engagement protrusion of the door frame connection member fits into the recess formed on the upper surface of the upper frame, and constructed in the opening; After the upper frame construction step, a second vertical frame construction step is performed to construct the second vertical frame in the opening so as to be vertically connected to the upper frame. A method for constructing a door frame.

8. A method for constructing a door frame in an opening, the method comprising: first and second vertical frames arranged at a distance from each other and extending in a vertical direction; and an upper frame extending in the horizontal direction and vertically connecting upper ends of the first and second vertical frames; A first vertical frame construction process of constructing the first vertical frame in the opening; After the first vertical frame construction step, a fixing step of fixing the fixing portion of the door frame connecting member according to claim 5 to a groove bottom surface of a groove extending from an upper end to a lower end formed on an inner surface of the first vertical frame; After the fixing process, the upper frame is placed at the predetermined connection position where the engagement protrusion of the door frame connecting member fits into the recess formed on the upper surface of the upper frame, and then installed in the opening. After the upper frame construction step, a second vertical frame construction step is performed to construct the second vertical frame in the opening so as to be vertically connected to the upper frame. A method for constructing a door frame.

9. A fixture comprising the door frame according to claim 6.

Images