Door frame and door frame installation method
The door frame design with inward-projecting fixed elements and visible edges facilitates easy mortar filling and secure attachment, addressing the challenge of uniform mortar application in door frame construction.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SANWA SHUTTER CORP
- Filing Date
- 2024-11-26
- Publication Date
- 2026-06-05
AI Technical Summary
The challenge in constructing door frames is the difficulty in filling the inside of the lower frame with mortar without gaps, especially when the frame is inverted, making it difficult to achieve uniform attachment to the building structure.
The lower frame is designed with a top surface and visible edges, and fixed elements projecting inward from the vertical frames, allowing the filler material to be filled inside the lower frame without the ends, which are then secured after hardening, and fixed to the building structure using fastening members.
This method improves the workability of installing door frames by enabling easy and gap-free filling of mortar, enhancing the attachment process and ensuring a secure connection to the building structure.
Smart Images
Figure 2026092255000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a door frame and a method for constructing a door frame.
Background Art
[0002] FIG. 12 is a longitudinal sectional view of a conventional door device, showing a door frame in the shape of a four-sided frame composed of an upper frame 1′, left and right vertical frames 2′, and a lower frame 3′, and a door body D attached to the door frame. When attaching a fitting (door frame) to a concrete base, it is common to fill the space between the fitting and the concrete base with mortar M (so-called "wet method"). However, in the door frame, especially the inside of the lower frame cannot be directly observed, so it is difficult to fill the inside of the lower frame with mortar without gaps, and it is difficult to fill the mortar after constructing the door frame. FIG. 13 shows an example of an idea for filling mortar into the lower frame. The door frame composed of the upper frame 1′, left and right vertical frames 2′, and lower frame 3′ is inverted upside down, and mortar M is filled into the lower frame and hardened.
[0003] Patent Document 1 discloses a method for filling a filler in a door frame and a method for assembling a door frame, but it is premised on a construction procedure for attaching a four-sided frame assembled from an upper frame, left and right vertical frames, and a lower frame to a building structure.
Patent Document 1
Disclosure of the Invention
Problems to be Solved by the Invention
[0004] An object of the present invention is to provide a door frame and a method for constructing a door frame with improved attachment workability.
Means for Solving the Problems
[0005] The technical means adopted by the present invention to solve such problems are as follows: In a door frame composed of an upper frame, left and right vertical frames, and a lower frame, The aforementioned lower frame consists of a top surface and a pair of visible edges. At the lower ends of the left and right vertical frames, the left and right fixed elements are projected inward in an opposing manner. The inside of the lower frame is filled with a filler material, except for the ends in the longitudinal direction, and once the filler material has hardened, the ends in the longitudinal direction are placed over the fixed element and secured. It's a door frame.
[0006] In one embodiment, the fixed element has a fixed surface that is in surface contact with the upper surface of the lower frame, and / or at least one of its visible edges. The upper surfaces of both longitudinal ends of the lower frame, and / or at least one of the visible edges, are fixed to the surface to be fixed by fastening members. In one embodiment, the fixed element consists of a horizontal plane and a pair of downward-sloping edges. The horizontal plane, and / or at least one of the hanging edges, forms the fixed surface.
[0007] In one embodiment, the lower frame is provided with partition plates that separate the longitudinal ends from the space in which the filler material is filled. In one embodiment, the distance between the partition plate and the longitudinal edge of the lower frame is greater than or equal to the protruding dimension of the fixed element.
[0008] The door frame construction method adopted in this invention is: The process involves attaching a three-sided frame to the building structure, which consists of an upper frame and left and right vertical frames, with left and right fixed elements projecting inward in a facing manner from the lower ends of the left and right vertical frames. The process involves inverting the lower frame, which consists of a top surface and a pair of visible edges, and filling the inside of the lower frame with filler material, excluding the ends in the longitudinal direction, and allowing it to harden. The steps include fixing the lower frame to the left and right fixed elements by placing the longitudinal ends of the lower frame over the left and right fixed elements, It consists of.
[0009] In one embodiment, the fixed element has a fixed surface that is in surface contact with the upper surface of the lower frame, and / or at least one of its visible edges. The upper surfaces of both ends of the lower frame in the longitudinal direction, and / or at least one of the visible edges, are fixed to the surface to be fixed by fastening members. In one embodiment, the fixed element consists of a horizontal plane and a pair of downward-sloping edges. The horizontal plane, and / or at least one of the hanging edges, forms the fixed surface.
[0010] In one embodiment, the lower frame is provided with partition plates that separate the longitudinal ends from a space into which the filler material is filled, and the filler material is filled into the space and hardened. [Effects of the Invention]
[0011] This invention can improve the workability of installing door frames in so-called wet construction methods. In particular, when a partition plate is provided, the filler material can be easily filled while avoiding the fixed element. [Brief explanation of the drawing]
[0012] [Figure 1] This is a front view of the door frame according to this embodiment. [Figure 2] This is a magnified section of Figure 1. [Figure 3] This is a cross-sectional view of the door frame according to this embodiment. [Figure 4] This is a cross-sectional view taken along the arrows in Figure 3. [Figure 5] This is a front view of the three-sided frame in the door frame according to this embodiment. [Figure 6] These are a front view, a top view, and a view taken from the arrow in the front view (side view seen from the inside) of the lower part of the three-sided frame in the door frame according to this embodiment. [Figure 7] This embodiment includes a plan view, a side view, and a cross-sectional view taken along the arrow in the side view of the lower frame of the door frame. [Figure 8]A diagram for explaining a connection structure between a vertical frame (first shape) and a lower frame (first shape) via a fixed element (first form), where the left diagram is an exploded perspective view and the right diagram is a perspective view showing the connected state. [Figure 9] An exploded perspective view for explaining a connection structure between a vertical frame (first shape) and a lower frame (first shape) via a fixed element (second and third forms). [Figure 10] A cross-sectional view for explaining a connection structure between a vertical frame (second shape) and a lower frame (second shape) via a fixed element (fourth form). [Figure 11] A diagram for explaining a connection structure between a vertical frame (second shape) and a lower frame (second shape) via a fixed element (fourth form), where the left diagram is an exploded perspective view and the right diagram is a perspective view showing the connected state. [Figure 12] A longitudinal sectional view of a conventional door device. [Figure 13] A diagram illustrating a conventional method of filling mortar in the lower frame of a four-sided frame. [Embodiments for Carrying Out the Invention]
[0013] [A] Overview of the Door Frame FIG. 1 shows a door frame in an assembled state. The door frame is a four-sided frame composed of an upper frame 1 extending horizontally, left and right vertical frames 2, 2 extending vertically, and a lower frame (threshold) 3 extending horizontally. A door body (not shown) as a hinged door is to be attached to the door frame. One vertical frame 2 is the leading-side vertical frame, and the other vertical frame 2 is the trailing-side vertical frame. The trailing-side vertical frame 2 is provided with a support element h of a hinge for attaching the door body to the door frame so as to be openable and closable. In the present embodiment, the materials of the upper frame 1, the vertical frames 2, and the lower frame 3 are steel or stainless steel.
[0014] In the present embodiment, the upper frame 1, the vertical frames 2, and the lower frame 3 are formed by bending a steel plate into a predetermined shape and have hollow portions. At least the hollow portion of the lower frame 3 is filled with mortar M. The hollow portions of the upper frame 1 and the vertical frames 2 may be filled with mortar M, but there may also be cases where the hollow portions of the upper frame 1 and the vertical frames 2 are not filled with mortar M.
[0015] The longitudinal ends of the upper frame 1 are fixed in contact with the upper ends of the projection surfaces of the left and right vertical frames 2, and a three-sided frame is formed from the upper frame 1 and the left and right vertical frames 2. While welding and screw fastening are examples of connecting means between the longitudinal ends of the upper frame 1 and the upper ends of the vertical frames 2, the connecting means are not limited. The connecting means between the longitudinal end of the lower frame 3 and the lower ends of the vertical frames 2 consists of fixed elements 4 provided at the lower ends of the left and right vertical frames 2, and fastening means (screws in this embodiment). In this embodiment, the left and right fixed elements 4 are projected inward and opposite to each other from the lower ends of the left and right vertical frames 2 (see Figure 5), and the longitudinal end 3A of the lower frame 3 is fixed with screws S while overlapping the fixed elements 4. In this embodiment, the material of the fixed elements 4 is steel or stainless steel.
[0016] In one embodiment, the upper frame 1 and the left and right vertical frames 2 are assembled in the factory as a three-sided frame, and the left and right fixing elements 4 are provided at the lower ends of the left and right vertical frames 2 in the factory, and the three-sided frame (see Figure 5) is transported to the site. The lower frame 3 is transported to the site separately from the three-sided frame and is attached to the three-sided frame on site to form a four-sided frame-like door frame. The three-sided frame may also be transported to the site as a four-sided frame with the lower ends of the vertical frames 2 temporarily fixed together with a sacrificial frame (not shown), and the sacrificial frame may be removed and attached to the structure as a three-sided frame. Alternatively, the upper frame 1 and the left and right vertical frames 2 (equipped with fixing elements 4) may be transported to the site individually, assembled into a three-sided frame on site, and then the lower frame 3 may be attached to form a four-sided frame-like door frame.
[0017] [B] Vertical frame [B-1] First shape Figures 2 to 6, 8 and 9 disclose the first shape of the vertical frame 2. The vertical frame 2 is a long member extending in the opening height direction and comprises a first visible surface 20 on the outdoor side, a second visible surface 21 on the indoor side, an outdoor-side visible surface 22 extending indoors from the first visible surface 20, an indoor-side visible surface 23 extending outdoors from the second visible surface 21, and an intermediate visible surface 24 connecting the indoor-side end of the outdoor-side visible surface 22 and the outdoor-side end of the indoor-side visible surface 23. In plan view, the visible portion of the vertical frame 2 is stepped from the outdoor-side visible surface 22 and the indoor-side visible surface 23, with the intermediate visible surface 24 serving as the door stop. In this embodiment, the fixed element 4 is fixed (typically by welding) to the lower end of the outdoor-side visible surface 22.
[0018] [B-2]Second shape Figures 10 and 11 disclose a second shape of the vertical frame 2. The vertical frame 2 is a long member extending in the opening height direction, and has a first visible surface 20 on the outdoor side, a second visible surface 21 on the indoor side, an outdoor-side visible surface 22 extending from the first visible surface 20 to the indoor side, an indoor-side visible surface 23 extending from the second visible surface 21 to the outdoor side, and a convex portion with an intermediate visible surface 25 formed between the indoor-side end of the outdoor-side visible surface 22 and the outdoor-side end of the indoor-side visible surface 23. A groove 26 opening toward the outdoor side is formed in the convex portion, and an airtight material (not shown) is fitted into the groove 26. The visible portion of the vertical frame 2 is convex in plan view due to the outdoor-side visible surface 22, the indoor-side visible surface 23 and the convex portion, and the airtight material fitted into the groove 26 formed in the outdoor-side portion of the convex portion serves as the door stop. In this embodiment, the fixed element 4 is fixed (typically by welding) across the lower end of the outdoor-side facing surface 22 and the lower end of the indoor-side facing surface 23. Although the first and second shapes of the vertical frame 2 are shown in the illustration, the shape of the vertical frame 2 is not limited to the illustrated shapes.
[0019] [C] Fixed element [C-1] First form Figures 2-4, 6, and 8 disclose a first form of the fixed element 4. The fixed element 4 is formed in a U-shape in cross-section from a horizontal plane 40 and a pair of hanging edges. In the fixed element 4, one hanging edge is the outdoor-facing edge 41, and the other hanging edge is the indoor-facing edge 42. The fixed element 4 is fixed (welded) to the lower end of the outdoor-facing surface 22 of the vertical frame 2. In the illustrated embodiment, when the fixed element 4 is fixed to the lower end of the outdoor-facing surface 22 of the vertical frame 2, the lower ends of the fixed element 4 (outdoor-facing edge 41 and indoor-facing edge 42) are located slightly above the lower end of the vertical frame 2, but they may be aligned with the lower end of the vertical frame 2.
[0020] The horizontal surface 40 of the fixed element 4, and / or one or both of the outdoor-facing edge 41 and the indoor-facing edge 42, form a fixed surface to which the lower frame 3 (lengthwise end portion 3A) is fixed. In the examples shown in Figures 2 to 4 and Figure 8, the horizontal surface 40 of the fixed element 4 forms the fixed surface.
[0021] The depth of the fixed element 4 is smaller than the depth of the outdoor-side depth surface 22 of the vertical frame 2. When the fixed element 4 is fixed to the outdoor-side depth surface 22, the outdoor-side facing edge 41 of the fixed element 4 is located slightly inward from the first facing surface 20 of the vertical frame 2. The indoor-side facing edge 42 of the fixed element 4 and the intermediate facing surface 24 of the vertical frame 2 are separated and facing each other with a gap 24'. The gap 24' is slightly larger than the thickness of the indoor-side facing edge 32 of the lower frame 3. The facing width of the fixed element 4, i.e., the projection dimension of the fixed element 4 from the outdoor-side depth surface 22, is denoted as dimension α (see Figure 6).
[0022] [C-2] Second form Figure 9 (left) discloses a second form of the fixed element 4. The fixed element 4 has a horizontal surface 40 and a projection piece 43 hanging down from one of the projection edges of the horizontal surface 40, and has an L-shape in cross-section. The fixed element 4 is projected from the vertical frame 2 by fixing the projection piece 43 to the lower end of the outdoor projection surface 22 of the vertical frame 2. In this form, the horizontal surface 40 of the fixed element 4 forms the fixed surface to which the lower frame 3 (lengthwise end 3A) is fixed. The visible width of the fixed element 4 in the second form is the same as in the first form, with dimension α.
[0023] [C-3] Third form Figure 9 (right) discloses a third form of the fixed element 4. The fixed element 4 is formed in a U-shape in plan view from opposing outdoor-side facing edges 41 and indoor-side facing edges 42, and a projection piece 43 that connects the ends of the outdoor-side facing edges 41 and indoor-side facing edges 42. The fixed element 4 is projected from the vertical frame 2 by fixing the projection piece 43 to the lower end of the outdoor-side projection surface 22 of the vertical frame 2. In this form, one or both of the outdoor-side facing edges 41 and indoor-side facing edges 42 of the fixed element 4 form a fixed surface to which the lower frame 3 (lengthwise end portion 3A) is fixed. The visible width of the fixed element 4 in the third form is the same as in the first form, with dimension α.
[0024] [C-4] Fourth form Figures 10 and 11 disclose a fourth form of the fixed element 4. The fixed element 4 is formed in a U-shape in cross-section, consisting of a horizontal surface 40 and a pair of hanging edges. In the fixed element 4, one hanging edge is the outdoor-facing edge 41, and the other hanging edge is the indoor-facing edge 42. The depth of the fixed element 4 is slightly smaller than the depth of the vertical frame 2, and a notch is formed on one of the depth edges of the horizontal surface 40 at an intermediate position in the depth direction to receive the convex portion of the vertical frame 2. The fixed element 4 is fixed (welded) by one of its depth edges across the lower end portions of the outdoor-facing surface 22 and the indoor-facing surface 23 of the vertical frame 2. The horizontal surface 40 of the fixed element 4, and / or one or both of the outdoor-facing edge 41 and the indoor-facing edge 42 form a fixed surface to which the lower frame 3 (lengthwise end portion 3A) is fixed. In the examples shown in Figures 10 and 11, the outdoor-facing edge 41 and the indoor-facing edge 42 of the fixed element 4 form the fixed surface to which the lower frame 3 (lengthwise end portion 3A) is fixed. The visible width of the fixed element 4 in the fourth embodiment is the same as in the first embodiment, with dimension α.
[0025] [D] Bottom frame [D-1] First shape Figures 2-4, 7, 8, and 9 disclose the first shape of the lower frame 3. The lower frame 3 consists of a horizontal top surface 30 and a pair of visible edges, one of which is the outdoor-side visible edge 31 and the other is the indoor-side visible edge 32. The lower frame 3 is formed in a U-shape in cross-section from the top surface 30, the outdoor-side visible edge 31 and the indoor-side visible edge 32, and has an internal space along its length, into which mortar M is filled as a filler material. In this embodiment, the lower frame 3 is provided with a partition plate 33 that separates the longitudinal end portion 3A from the space into which the mortar M is filled. The partition plate 33 has a shape and dimensions that substantially match the cross-sectional shape of the internal space of the lower frame 3, and is fixed to the inner surface of the lower frame 3 by welding or adhesive, for example. Multiple reinforcing plates 35 are fixed (welded) to the lower frame 3 at predetermined locations along its length, connecting the outdoor-facing edge 31 and the indoor-facing edge 32. Additionally, reinforcing bars 34 extending along the length are fixed (welded) to the reinforcing plates 35.
[0026] Within the internal space of the lower frame 3, the area enclosed by the outdoor-facing edge 31, the indoor-facing edge 32, and the left and right partition plates 33 forms a mortar-filled space, and mortar M is filled into this space. That is, within the internal space of the lower frame 3, mortar M is filled except for the longitudinal ends (longitudinal end portions 3A). In this embodiment, the lower frame 3 is transported to the site separately from the three-sided frame (upper frame 1 and left and right vertical frames 2). With the lower frame 3 inverted (with the top surface 30 as the bottom surface), mortar M is filled into the mortar-filled space, and the lower frame 3 is returned to its original position after the mortar M has hardened.
[0027] Mortar M is not filled into the internal space of the longitudinal end portion 3A of the lower frame 3, and this internal space is hollow. A hole 36 for a screw S is formed in the upper surface 30A of the longitudinal end portion 3A (see Figures 7, 8 left, and 9 left). The longitudinal end portion 3A of the lower frame 3 is the part that is fixed to the fixed element 4. In the embodiments shown in Figures 8 and 9 left, the horizontal upper surface 30A of the longitudinal end portion 3A of the lower frame 3 forms a fixing surface that is fixed to the fixed element 4. In the embodiment shown in Figure 9 right, the outdoor-facing edge 31 and the indoor-facing edge 32 of the longitudinal end portion 3A of the lower frame 3 form a fixing surface that is fixed to the fixed element 4, and a hole 37 for a screw S (only one is shown) is formed in the outdoor-facing edge 31 and the indoor-facing edge 32.
[0028] The depth of the internal space of the lower frame 3 (the distance between the inner surface of the outdoor-facing edge 31 and the inner surface of the indoor-facing edge 32) is approximately the same as, or slightly larger than, the depth of, the fixed element 4. When the longitudinal end portion 3A of the lower frame 3 is placed over the fixed element 4, the upper surface 30A abuts against the horizontal surface 40 of the fixed element 4, the outdoor-facing edge 31 is close to or abuts against the outdoor-facing edge 41 of the fixed element 4, and the indoor-facing edge 32 is close to or abuts against the indoor-facing edge 42 of the fixed element 4. The height dimension of the space in the lower frame 3 is such that when the longitudinal end portion 3A of the lower frame 3 is placed over the fixed element 4, the lower ends of the lower frame 3 (outdoor-facing edge 31 and indoor-facing edge 32) are approximately aligned with the lower end of the vertical frame 2. In the lower frame 3, the distance between the partition plate 33 and the longitudinal edge of the lower frame 3, i.e., the visible dimension β of the longitudinal end portion 3A, is approximately the same as or greater than the protruding dimension α of the fixed element 4.
[0029] [D-2]Second shape In the embodiments shown in Figures 10 and 11, the lower frame 3 consists of an upper surface 30 and a pair of visible edges, one of which is the outdoor-side visible edge 31 and the other is the indoor-side visible edge 32. The upper surface 30 consists of a horizontal outdoor-side upper surface 300, a horizontal intermediate upper surface 301 located above the outdoor-side upper surface 300, and an inclined indoor-side upper surface 302 that slopes inward from the indoor-side end of the intermediate upper surface 301. A groove 303 opening to the outside is formed between the indoor-side portion of the outdoor-side upper surface 300 and the outdoor-side portion of the intermediate upper surface 301, and an airtight material (not shown) is fitted into the groove 303.
[0030] The lower frame 3 has an internal space extending along its length, and this internal space is filled with mortar M as a filler material. In this embodiment, the lower frame 3 is provided with a partition plate 33 that separates the longitudinal end portion 3A from the space filled with mortar M. The partition plate 33 has a shape and dimensions that substantially match the cross-sectional shape of the internal space of the lower frame 3, and is fixed to the inner surface of the lower frame 3 by welding, for example. Multiple reinforcing plates (not shown) connecting the outdoor side facing edge 31 and the indoor side facing edge 32 are fixed (welded) to the lower frame 3 at predetermined locations along its length, and one or more reinforcing bars (not shown) extending along its length are fixed (welded) to the reinforcing plates. A notch is formed at the longitudinal end edge of the lower frame 3 (the portion corresponding to the intermediate upper surface 301) corresponding to the convex portion of the depth portion of the vertical frame 2.
[0031] Within the internal space of the lower frame 3, the area enclosed by the outdoor-facing edge 31, the indoor-facing edge 32, and the left and right partition plates 33 forms a mortar-filled space, and mortar M is filled into this space. That is, within the internal space of the lower frame 3, mortar M is filled except for the longitudinal ends (longitudinal end portions 3A). In this embodiment, the lower frame 3 is transported to the site separately from the three-sided frame (upper frame 1 and left and right vertical frames 2). With the lower frame 3 inverted (with the top surface 30 as the bottom surface), mortar M is filled into the mortar-filled space, and the lower frame 3 is returned to its original position after the mortar M has hardened.
[0032] Mortar M is not filled into the internal space of the longitudinal end portion 3A of the lower frame 3, and this internal space is hollow. Screw holes 37 are formed in the outdoor-facing edge 31 and the indoor-facing edge 32 of the longitudinal end portion 3A (see Figure 11). The longitudinal end portion 3A of the lower frame 3 is the part that is fixed to the fixed element 4. In the embodiment shown in Figure 11, the outdoor-facing edge 31 and the indoor-facing edge 32 of the longitudinal end portion 3A of the lower frame 3 form a fixing surface that is fixed to the fixed element 4.
[0033] The depth of the space in the lower frame 3 (distance between the inner surface of the outdoor-side facing edge 31 and the inner surface of the indoor-side facing edge 32) is approximately the same as, or slightly larger than, the depth of the fixed element (fourth form) 4. When the longitudinal end portion 3A of the lower frame 3 is placed over the fixed element 4, the outdoor-side upper surface 300 of the upper surface 30 abuts against the outdoor half of the horizontal plane 40 of the fixed element 4, the outdoor-side facing edge 31 approaches or abuts against the outdoor-side facing edge 41 of the fixed element 4, and the indoor-side facing edge 32 approaches or abuts against the indoor-side facing edge 42 of the fixed element 4. The height dimension of the space in the lower frame 3 is such that when the longitudinal end portion 3A of the lower frame 3 is placed over the fixed element 4, the lower ends of the lower frame 3 (outdoor-side facing edge 31 and indoor-side facing edge 32) approximately coincide with the lower end of the vertical frame 2. Similar to the first shape of the lower frame 3, in the second shape of the lower frame 3, the distance between the partition plate 33 and the longitudinal edge of the lower frame 3, i.e., the visible dimension β of the longitudinal end portion 3A, is approximately the same as or greater than the protruding dimension α of the fixed element 4 (referencing the description of the first shape of the lower frame 3). Although the first and second shapes of the lower frame 3 are shown in the illustration, the shape of the lower frame 3 is not limited to the illustrated shapes.
[0034] [E] Fixing structure of vertical frame and bottom frame [E-1] First form Referring to Figures 2 to 4 and Figure 8, the fixing structure of the vertical frame (first shape) 2 and the lower frame (first shape) 3 via the fixed element (first form) 4 will be described. Mortar M is filled into the mortar-filled space inside the lower frame 3, and when the mortar M has hardened, the longitudinal end portion 3A is placed over the fixed element 4 and fixed. In this specification, "hardened state" does not necessarily mean that the mortar M has hardened completely, but includes a state in which the fluidity has decreased from the initial state of filling (for example, a hardened state in which it does not fall under its own weight). By providing a partition plate 33 in the internal space of the lower frame 3, the internal space of the longitudinal end portion 3A is hollow, and there is no need to check the filling position of the mortar M when placing the longitudinal end portion 3A of the lower frame 3 over the fixed element 4.
[0035] When the longitudinal end portion 3A of the lower frame 3 is placed over the element to be fixed 4, the upper surface 30 abuts against the horizontal surface 40 of the element to be fixed 4 without interfering with the filled mortar M, the outdoor-side facing edge 31 approaches or abuts against the outdoor-side facing edge 41 of the element to be fixed 4, and the indoor-side facing edge 32 approaches or abuts against the indoor-side facing edge 42 of the element to be fixed 4. In addition, the indoor-side facing edge 32 of the longitudinal end portion 3A of the lower frame 3 is inserted into the gap 24' between the indoor-side facing edge 24 of the element to be fixed 4 and the intermediate facing surface 24 of the vertical frame 2. In this state, the upper surface 30A of the longitudinal end portion 3A of the lower frame 3 is fixed to the horizontal surface 40 of the element to be fixed 4 with screws S. With the lower frame 3 fixed to the fixed element 4, the longitudinal edges of the upper surface 30, the outdoor-facing edge 31, and the indoor-facing edge 32 are in contact with the lower end of the outdoor-facing surface 22 of the vertical frame 2.
[0036] [E-2] Second form Referring to the left diagram in Figure 9, the fixing structure of the vertical frame (first shape) 2 and the lower frame (first shape) 3 via the fixed element (second form) 4 will be explained. Mortar M is filled into the mortar-filled space inside the lower frame 3, and once the mortar M has hardened, the longitudinal end portion 3A is placed over the fixed element 4 and fixed. By providing a partition plate 33 in the internal space of the lower frame 3, the internal space of the longitudinal end portion 3A is hollow, and there is no need to check the filling position of the mortar M when placing the longitudinal end portion 3A of the lower frame 3 over the fixed element 4.
[0037] When the longitudinal end portion 3A of the lower frame 3 is placed over the fixed element 4, the upper surface 30A contacts the horizontal surface 40 of the fixed element 4 without interfering with the filled mortar M. In this state, the upper surface 30A of the longitudinal end portion 3A of the lower frame 3 is fixed to the horizontal surface 40 of the fixed element 4 with screws S. With the lower frame 3 fixed to the fixed element 4, the longitudinal edges of the upper surface 30, the outdoor-side facing edge 31, and the indoor-side facing edge 32 contact the lower end portion of the outdoor-side facing surface 22 of the vertical frame 2.
[0038] [E-3] Third form Referring to the right diagram in Figure 9, the fixing structure of the vertical frame (first shape) 2 and the lower frame (first shape) 3 via the fixed element (third form) 4 will be explained. Mortar M is filled into the mortar-filled space inside the lower frame 3, and once the mortar M has hardened, the longitudinal end portion 3A is placed over the fixed element 4 and fixed. By providing a partition plate 33 in the internal space of the lower frame 3, the internal space of the longitudinal end portion 3A is hollow, and there is no need to check the filling position of the mortar M when placing the longitudinal end portion 3A of the lower frame 3 over the fixed element 4.
[0039] When the longitudinal end portion 3A of the lower frame 3 is placed over the element to be fixed 4, both ends of the upper surface 30 in the depth direction abut against the upper edges of the outdoor side facing edge 31 and the indoor side facing edge 32 without interfering with the filled mortar M, the outdoor side facing edge 31 approaches or abuts against the outdoor side facing edge 41 of the element to be fixed 4, and the indoor side facing edge 32 approaches or abuts against the indoor side facing edge 42 of the element to be fixed 4. In this state, the outdoor side facing edge 31 of the longitudinal end portion 3A of the lower frame 3 is fixed to the outdoor side facing edge 41 of the element to be fixed 4 with screws S, and the indoor side facing edge 32 of the longitudinal end portion 3A of the lower frame 3 is fixed to the indoor side facing edge 42 of the element to be fixed 4 with screws S. With the lower frame 3 fixed to the fixed element 4, the longitudinal edges of the upper surface 30, the outdoor-facing edge 31, and the indoor-facing edge 32 are in contact with the lower end of the outdoor-facing surface 22 of the vertical frame 2.
[0040] [E-4] Fourth form Referring to Figures 10 and 11, the fixing structure of the vertical frame (second shape) 2 and the lower frame (second shape) 3 via the fixed element (fourth form) 4 will be described. Mortar M is filled into the mortar-filled space inside the lower frame 3, and once the mortar M has hardened, the longitudinal end portion 3A is placed over the fixed element 4 and fixed. By providing a partition plate 33 in the internal space of the lower frame 3, the internal space of the longitudinal end portion 3A is hollow, and there is no need to check the filling position of the mortar M when placing the longitudinal end portion 3A of the lower frame 3 over the fixed element 4.
[0041] When the longitudinal end portion 3A of the lower frame 3 is placed over the element to be fixed 4, the outdoor upper surface 300 of the upper surface 30 abuts against the outdoor half of the horizontal surface 40 of the element to be fixed 4 without interfering with the filled mortar M, the outdoor visible edge 31 approaches or abuts against the outdoor visible edge 41 of the element to be fixed 4, and the indoor visible edge 32 approaches or abuts against the indoor visible edge 42 of the element to be fixed 4. In this state, the outdoor visible edge 31 of the longitudinal end portion 3A of the lower frame 3 is fixed to the outdoor visible edge 41 of the element to be fixed 4 with screws S, and the indoor visible edge 32 of the longitudinal end portion 3A of the lower frame 3 is fixed to the indoor visible edge 42 of the element to be fixed 4 with screws S. With the lower frame 3 fixed to the fixed element 4, the notch in the middle of the depth direction of the longitudinal end of the upper surface 30 of the lower frame 3 receives the convex portion of the depth surface of the vertical frame 2, the longitudinal edges of the outdoor facing edge 31 and the outdoor upper surface 300 abut against the outdoor depth surface 22, and the longitudinal edges of the indoor facing edge 32 and the indoor upper surface 302 abut against the indoor depth surface 23. In the fourth embodiment, the depth width of the vertical frame 2 and the depth width of the lower frame 3 are approximately the same, and the depth width of the fixed element 4 is also approximately the same as the depth width of the internal space of the lower frame 3. However, as in the first to third embodiments, the depth widths of the lower frame 3 and the fixed element 4 may correspond to the depth width of the outdoor depth surface 22 of the vertical frame 2. Furthermore, in the first to third forms, as in the fourth form, the depth of the vertical frame 2 and the depth of the lower frame 3 may be approximately the same, and the depth of the fixed element 4 may also be approximately the same as the depth of the internal space of the lower frame 3.
[0042] [F] Door frame installation method The method for constructing the door frame according to this embodiment consists of: (1) the step of attaching a three-sided frame to the building structure, which consists of an upper frame 1 and left and right vertical frames 2, with left and right fixed elements 4 projecting inward toward the lower ends of the left and right vertical frames 2; (2) the step of filling the inside of the lower frame 3, which consists of an upper surface 30 and a pair of visible edges (outdoor side visible edge 31, indoor side visible edge 32), with mortar M, except for the ends in the longitudinal direction, and allowing it to harden; and (3) the step of fixing the ends in the longitudinal direction of the lower frame 3 to the left and right fixed elements 4 with screws S while covering the fixed elements 4.
[0043] In this embodiment, by providing a partition plate 33 in the internal space of the lower frame 3, the internal space of the longitudinal end portion 3A is hollow. When placing the longitudinal end portion 3A of the lower frame 3 over the fixed element 4, it is not necessary to check the filling position of the mortar M, and the filled mortar M does not interfere with the mounting element 4, resulting in good workability.
[0044] In this embodiment, the horizontal surface 40 of the fixed element 4, and / or at least one of the outdoor-facing edge 41 and the indoor-facing edge 42 forms a fixed surface, and when the three-sided frame is attached to the building structure, the fixed surface is exposed. The lower frame 3 is fixed to the fixed surface of the fixed element 4 with screws S at the upper surface 30A of the longitudinal end portion 3A, and / or at least one of the outdoor-facing edge 31 and the indoor-facing edge 32. Therefore, when the three-sided frame is attached to the building structure, the longitudinal end portion 3A of the lower frame 3 can be fixed to the vertical frame 2 with screws S via the fixed element 4. Furthermore, the workspace for fixing with screws S is the same as the workspace for attaching the lower frame 3.
[0045] In this embodiment, the mortar M can be filled into the lower frame 3 as a filler before attaching the lower frame 3 to the three-sided frame and assembling the door frame, thus improving the workability of the mortar M filling work. The lower frame 3 is installed below the opening area formed by the three-sided frame attached to the building structure, and the longitudinal end portion 3A is placed over the fixed element 4 and fixed with screws S, resulting in good workability. [Explanation of symbols]
[0046] 1. Top frame 2 Vertical frame 3 Bottom frame 3A End portion in the longitudinal direction 30 Top side 30A Upper surface of both ends in the length direction of the lower frame 31. Outdoor side facing edge (a pair of facing edges) 32 Indoor side facing edge (a pair of facing edges) 33 Partition Plates 4 Fixed element 40 horizontal plane 41. Outdoor side facing edge (a pair of hanging edges) 42 Indoor side facing edge (a pair of hanging edges) S Screw (fastening component) M Mortar (filler) α The visible width of the fixed element (the protruding dimension of the fixed element) β The visible dimension at the end in the longitudinal direction (distance between the partition plate and the longitudinal edge of the lower frame)
Claims
1. In a door frame consisting of an upper frame, left and right vertical frames, and a lower frame, The aforementioned lower frame consists of a top surface and a pair of visible edges. At the lower ends of the left and right vertical frames, the left and right fixed elements are projected inward in an opposing manner. The inside of the lower frame is filled with a filler material, except for the ends in the longitudinal direction, and once the filler material has hardened, the ends in the longitudinal direction are placed over the fixed element and secured. Door frame.
2. The fixed element has a fixed surface that is in surface contact with the upper surface of the lower frame, and / or at least one of its visible edges. The upper surfaces of both longitudinal ends of the lower frame, and / or at least one of the visible edges, are fixed to the surface to be fixed by fastening members. The door frame according to claim 1.
3. The fixed element consists of a horizontal plane and a pair of downward-sloping edges. The horizontal plane, and / or at least one of the hanging edges, forms the fixed surface. The door frame according to claim 2.
4. The lower frame is provided with partition plates that separate the longitudinal ends from the space where the filler material is filled. A door frame according to any one of claims 1 to 3.
5. The distance between the partition plate and the longitudinal edge of the lower frame is greater than or equal to the protruding dimension of the fixed element. The door frame according to claim 4.
6. The process involves attaching a three-sided frame to the building structure, which consists of an upper frame and left and right vertical frames, with left and right fixed elements projecting inward in a facing manner from the lower ends of the left and right vertical frames. The process involves inverting the lower frame, which consists of a top surface and a pair of visible edges, and filling the inside of the lower frame with filler material, excluding the ends in the longitudinal direction, and allowing it to harden. The steps include fixing the lower frame to the left and right fixed elements by placing the longitudinal ends of the lower frame over the left and right fixed elements, A method for constructing a door frame consisting of the following.
7. The fixed element has a fixed surface that is in surface contact with the upper surface of the lower frame, and / or at least one of its visible edges. The upper surfaces of both ends of the lower frame in the longitudinal direction, and / or at least one of the visible edges, are fixed to the surface to be fixed by fastening members. The method for constructing a door frame according to claim 6.
8. The fixed element consists of a horizontal plane and a pair of downward-sloping edges. The horizontal plane, and / or at least one of the hanging edges, forms the fixed surface. The method for constructing a door frame according to claim 7.
9. The lower frame is provided with partition plates that separate the longitudinal ends from the space into which the filler material is filled, and the filler material is filled into the space and hardened. A method for constructing a door frame according to any one of claims 6 to 8.