Barrier-free building fixtures
The replaceable lower frame mounting member system addresses the lack of barrier-free design in sliding windows by allowing conversion to accessible configurations, improving accessibility and reducing costs through component reuse.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SANKYO TATEYAMA INC
- Filing Date
- 2023-04-27
- Publication Date
- 2026-06-11
- Estimated Expiration
- Not applicable · inactive patent
Smart Images

Figure 0007873205000001 
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Figure 0007873205000003
Abstract
Description
【Technical Field】 【0001】 The present invention relates to barrier-free fittings. 【Background Art】 【0002】 A sash of a sliding window having a plurality of shoji that can be opened and closed in the width direction is known. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0003】 Recently, the promotion of barrier-free design by flattening the floor surface at the entrance inside the room has been underway. Barrier-free design has also been demanded for sashes. 【Means for Solving the Problems】 【0004】 In order to solve the above problems, the fitting according to claim 1 includes a lower frame and a lower frame mounting member. The lower frame has an outdoor rail and an indoor rail. The lower frame mounting member has two types: a non-barrier-free member with a large step with respect to the rail and a barrier-free member with a small step with respect to the rail, and is replaceable so as to be changed from the non-barrier-free member to the barrier-free member. The barrier-free member includes an intermediate lower frame auxiliary member provided between the rails and a rail auxiliary member provided at the upper end of the indoor rail. A hanging piece of the shoji is positioned between the intermediate lower frame auxiliary member and the rail auxiliary member, and the rail auxiliary member is engaged and held only at the upper end of the rail. , only on the upper end of the rail and is characterized in that it is held. Further, the fitting according to claim 2 includes a lower frame and a lower frame mounting member. The lower frame has an outdoor rail and an indoor rail. The lower frame mounting member has two types: a non-barrier-free member with a large step with respect to the rail and a barrier-free member with a small step with respect to the rail. The barrier-free member includes an intermediate lower frame auxiliary member provided between the rails and a rail auxiliary member provided at the upper end of the indoor rail. A hanging piece of the shoji is positioned between the intermediate lower frame auxiliary member and the rail auxiliary member, and the rail auxiliary member is engaged only at the upper end of the rail. , only on the upper end of the railIt is held in place and is characterized by being replaceable so that it can be changed from a barrier-free component to a non-barrier-free component. 【0005】 Furthermore, the joinery according to claim 3 comprises a lower frame and a lower frame mounting member, the lower frame having an exterior rail and an interior rail, the lower frame mounting member being of two types: a non-barrier-free member with a large step difference with the rail and a barrier-free member with a small step difference with the rail, the barrier-free member including an intermediate lower frame auxiliary member provided between the rails and a rail auxiliary member provided at the upper end of the interior rail, the hanging piece of the sash being positioned between the intermediate lower frame auxiliary member and the rail auxiliary member, and the rail auxiliary member engaging only with the upper end of the rail. , only on the upper end of the rail It is held in place and is characterized by the ability to select and attach either a non-barrier-free component or a barrier-free component. [Effects of the Invention] 【0006】 With the above configuration, this invention can achieve barrier-free design for non-barrier-free building fixtures. [Brief explanation of the drawing] 【0007】 [Figure 1] This is a partially cutaway longitudinal cross-sectional view of a barrier-free building component according to an embodiment of the present invention. [Figure 2] This is a partially cutaway cross-sectional view of a barrier-free building component according to an embodiment of the present invention. [Figure 3] This is an enlarged view of the main part of Figure 1. [Figure 4] This is an enlarged cross-sectional view showing the shoji screen side of a barrier-free door. [Figure 5] This shows the bottom frame with the bottom frame support material and rollers removed. [Figure 6] This is an enlarged cross-sectional view showing the lower frame side of a barrier-free door / window. [Figure 7] This is a process diagram showing the manufacturing method of barrier-free building components according to the present invention, where (a) shows non-barrier-free building components, (b) shows the first step, and (c) shows the second step. [Figure 8]This is a process diagram showing the manufacturing method of barrier-free building components according to the present invention, where (a) shows the third step, (b) shows the fourth step, (c) shows a shoji screen composed of the third and fourth steps, (d) shows the fifth step, and (e) shows the sixth step. [Modes for carrying out the invention] 【0008】 Hereinafter, an embodiment of the barrier-free building component A according to the present invention will be described with reference to the drawings. In the following explanation, the same symbols in different figures indicate parts with the same function, and redundant explanations in each figure will be omitted where appropriate. 【0009】 [Configuration of barrier-free building fixtures] Barrier-free fixture A, as shown in Figures 1 and 2, is a sash with a sliding window in which an inner sash (sash) 1 and an outer sash (sash) 2 are arranged to slide freely in the opening direction, and is equipped with a barrier-free structure B. In the barrier-free building fixture A, an inner sash 1 and an outer sash 2 are arranged to slide freely in the width direction (hereinafter referred to as the left-right direction) relative to a window frame 3 fixed to the inner circumference of an opening a1 in the building structure a. 【0010】 As shown in Figures 1 and 2, the inner and outer sliding doors 1 and 2 are each four-sided frame structure, having upper and lower frames 1a, 1b, 2a, and 2b, and left and right vertical frames 1c, 1d, 2c, and 2d. Panels 1e and 2e, such as glass, are placed on the inner circumference, and rollers f are placed on the lower outer circumference of the lower frames 1b and 2b. As will be described later, door roller f is used in barrier-free door fixture A, and is replaced with the existing door roller c1, which will be described later, when the door is made barrier-free. 【0011】 As shown in Figures 1 and 2, the window frame 3 is a four-sided frame structure having upper and lower frames 3a and 3b and left and right vertical frames 3c and 3d, and is fixed to the inner circumference of the opening a1 of the building structure a. The lower frame 3b is provided with an indoor rail 30b and an outdoor rail 31b extending across its entire width. On the indoor side rail 30b, the door wheel f of the inner shutter 1 is placed, and on the outdoor side rail 31b, the door wheel f of the outer shutter 2 is placed. The inner shutter 1 and the outer shutter 2 are respectively guided by the indoor side rail 30b and the outdoor side rail 31b and open and close in the left - right direction. 【0012】 [Configuration of barrier - free structure] Next, the barrier - free structure B of the barrier - free fitting A will be described with reference to FIGS. 3 to 6. Also, the barrier - free structure B reduces the step on the inner - peripheral side of the lower frame 3b and reduces the step between the inner - peripheral side of the lower frame 3b and the indoor floor surface a2. 【0013】 The barrier - free structure B is provided so as to span the lower frames 1b, 2b of the inner and outer shutters 1, 2 and the lower frame 3b. On the inner and outer shutters 1, 2 side, as shown in FIG. 3, lower - frame auxiliary members 4 arranged in the recesses 10b, 20b on the lower - outer periphery of the lower frames 1b, 2b of the inner and outer shutters 1, 2 are provided. Since the configurations of the lower - frame auxiliary members 4 of the inner and outer shutters 1, 2 and the configurations of the door wheels f are the same, hereinafter, by explaining the configuration of the lower - frame auxiliary member 4 on the inner shutter 1 side and the configuration of the door wheel f, the explanation of the configuration of the lower - frame auxiliary member 4 on the outer shutter 2 side and the configuration of the door wheel f will be omitted by attaching the same reference numerals. 【0014】 (Configuration of lower - frame auxiliary member) As shown in FIGS. 4 and 5, the lower - frame auxiliary member 4 includes a fitting portion 4a fitted into the recesses 10b, 20b of the lower frame 1b and a hanging piece 4b continuously provided below the outdoor side of the fitting portion 4a, and the length in the longitudinal direction is formed over the entire left - right direction of the shutter 1. 【0015】 As shown in FIGS. 4 and 5, the fitting portion 4a is formed in a downward - concave shape, a through - hole 400 through which the door wheel f penetrates is provided in the upper wall 40a, and a protrusion 401 protrudes from the outer surface of the outdoor - side wall surface 40. When the fitting portion 4a is fitted into the recesses 10b, 20b, the upper wall 40a abuts against the upper walls 11b, 21b of the recesses 10b, 20b. The through hole 400 communicates with the through holes 12b and 22b provided in the upper walls 11b and 21b of the recesses 10b and 20b. When the door wheel f is installed, the door wheel f is passed through the through hole 400 so that the door wheel f passes through the through holes 12b and 22b. 【0016】 As shown in FIGS. 4 and 5, the protrusion 401 is provided at a position where the lower surface of the protrusion 401 is substantially flush with the upper surface of the engaging portion 100 provided on the outdoor side within the recesses 10b and 20b when the fitting portion 4a is fitted into the recesses 10b and 20b. Thereby, when the fitting portion 4a is fitted into the recesses 10b and 20b, the protrusion 401 can be engaged with the upper surface of the engaging portion 100 provided on the outdoor side within the recesses 10b and 20b. Also, the indoor-side wall surface 42a of the fitting portion 4a is provided such that the lower end of the wall surface 42a engages with the upper surface of the engaging portion 101 provided on the outdoor side within the recesses 10b and 20b when the fitting portion 4a is fitted into the recesses 10b and 20b. Such a fitting portion 4a is fixed by screwing a screw (not shown) from below in a state where the upper wall 40a abuts against the upper walls 11b and 21b of the recesses 10b and 20b. 【0017】 As shown in FIGS. 4 and 5, the hanging piece 4b is provided downward at the lower end of the outdoor-side wall surface 41a of the fitting portion 4a and is provided so as to protrude downward from the lower end of the lower frame 1b. The protruding length of the hanging piece 4b is formed such that the lower end is below the lowermost end of the roller 2f of the door wheel f and is swallowed into the guide groove 7 described later. 【0018】 (Configuration of the door wheel mounting structure) As shown in FIGS. 4 and 5, a fitting recess 402 into which the outdoor-side surface of the adapter 1f of the door wheel f is fitted is formed inside the outdoor-side wall surface 41a of the fitting portion 4a. Also, fitting holes 403 and 404 through which the engaging protrusions 11f provided on the adapter 1f penetrate and are fitted are formed in the outdoor-side wall surface 41a and the indoor-side wall surface 42a, respectively. The fitting holes 403 and 404 are positioned such that when the fitting portion 4a is fitted into the recesses 10b and 20b, the lower edges of the fitting holes 403 and 404 are substantially flush with the upper surface of the engaging portion 101. 【0019】 (The structure of the door roller) As shown in Figures 4 and 5, the door roller f is equipped with the aforementioned adapter 1f for attachment to the bottom frame 1b. The adapter 1f includes a contact portion 10f that abuts against the inner circumference of the upper walls 130 and 131 of the hollow portions 13b and 23b of the lower frame 1b, and an engaging projection 11f that engages with the upper surfaces of the engaging portions 100 and 101 within the recesses 10b and 20b. This adapter 1f is formed such that when the contact portion 10f contacts the upper walls 130 and 131, the engaging projection 11f engages with the upper surfaces of the engaging portions 100 and 101, and the lower side of the roller 2f of the door roller f is formed to protrude downward from the lower end of the lower frame 1b. This ensures that when the roller 2f is placed on the indoor rail 30b and the outdoor rail 31, a space is secured between the lower end of the bottom frame 1b and the inner circumference of the lower frame 3b, which is raised and becomes almost flush with the bottom as described later, thereby preventing interference between the sashes 1 and 2 and the inner circumference of the lower frame 3b. 【0020】 As shown in Figure 4, when the roller f is attached to the bottom frame 1b, the adapter 1f has a contact portion 10f that contacts the upper walls 130 and 131 of the hollow portions 13b and 23b of the bottom frames 1b and 2b, and an engaging projection 11f that engages with the upper surface of the engaging portions 100 and 101, so that the adapter 1f is sandwiched between the upper walls 130 and 131 of the bottom frames 1b and 2b and the upper surface of the engaging portions 100 and 101. Furthermore, when the roller f is attached to the bottom frame 1b, the adapter 1f has its exterior surface fitted into the fitting recess 402, and the engaging projection 11f penetrates the fitting holes 403 and 404 of the fitting portion 4a and engages with the engaging portions 100 and 101. 【0021】 In other words, the adapter 1f of the door roller f attached to the bottom frame 1b is held in place by being clamped between the upper walls 11b and 21b and the upper surfaces of the engaging parts 100 and 101. This eliminates the need for fixing with screws or the like when installing the door roller f, thereby increasing the ease and speed of barrier-free construction of the door. Furthermore, when the roller f is attached to the bottom frame 1b, the adapter 1f's exterior surface is fitted into the fitting recess 402, and the engaging projection 11f penetrates the fitting holes 403 and 404 of the fitting portion 4a and engages with the engaging portions 100 and 101, thereby ensuring the secure attachment of the roller f without the need for screws or other fasteners. 【0022】 On the other hand, as shown in Figure 3, the lower frame 3b side is provided with an outdoor lower frame auxiliary member 5a positioned in the outdoor recess 300 of the lower frame 3b, an intermediate lower frame auxiliary member 5b positioned in the intermediate recess 301 between the indoor rail 30b and the outdoor rail 31b of the lower frame 3b, a flat member 5c positioned in the indoor recess 302 of the lower frame 3b, and rail auxiliary members 6 provided at the upper end of the indoor rail 30b and the upper end of the outdoor rail 31b. Furthermore, the aforementioned guide grooves 7 are provided between the lower frame support material 5a and the outdoor rail 31b, and between the lower frame support material 5b and the indoor rail 30b. 【0023】 (Configuration of lower frame support material) The lower frame support members 5a, 5b and the flat member 5c are formed so that their longitudinal length extends across the entire left-right area of the lower frame. As shown in Figure 6, the lower frame support members 5a, 5b and the flat member 5c are formed such that their respective upper surfaces 50a, 50b, and 50c are at approximately the same height as the upper ends of the indoor rail 30b and the outdoor rail 31b. In other words, the lower frame support members 5a, 5b and the flat member 5c raise the outdoor recess 300, the intermediate recess 301, and the indoor recess 302, thereby reducing the step difference across the entire inner circumference of the lower frame 3b, and also reducing the step difference between the inner circumference of the lower frame 3b and the indoor floor surface a2. 【0024】 As shown in Figure 6, the lower frame support member 5a comprises an upper surface portion 50a and a fixed wall 51a and a support wall 52a provided below the upper surface portion 50a. The lower frame support member 5a has an upper surface portion 50a that straddles the upper end of the outdoor wall portion 303 of the outdoor recess 300 of the lower frame 3b, a fixed wall 51a that faces the outer surface of the outdoor wall portion 303 and is fixed to the outdoor wall portion 303 by screws or the like, and a support wall 52a that is fitted into the outdoor recess 300. An insertion space 7a for the hanging piece 4b is provided on the upper side of the support wall 52a. 【0025】 As shown in Figure 6, the lower frame support member 5b comprises an upper surface portion 50b and two support walls 51b and 52b located below the upper surface portion 50b, and is fitted into the intermediate recess 301. An insertion space 7a for the hanging piece 4b is provided above the support wall 51a on the interior side. 【0026】 (Composition of flat material) As shown in Figure 6, the flat material 5c comprises an upper surface portion 50c and two support walls 51c and 52c located below the upper surface portion 50c, one on the inside and one on the outside, and is fitted into the interior recess 302. 【0027】 (Composition of rail support materials) As shown in Figure 6, the rail support material 6 has a guide projection 6a on its upper end that guides the rolling of the roller 2f of the door roller f, and an airtight material holding portion 6b provided on the outdoor side of the upper surface 6a, and is fitted and attached to the upper ends of the indoor rail 30b and the outdoor rail 31b. The airtight material holding section 6b is provided to hold the airtight material 60 within the outdoor recess 300 and the intermediate recess 301 of the lower frame 3b. 【0028】 (Guide groove configuration) As shown in Figure 6, the guide groove 7 consists of a swallowing space 7a and an upper opening 7b that communicates with the swallowing space 7a. The guide groove 7 is formed between the outdoor end of the airtight material holding part 6b and the indoor ends of the lower frame auxiliary members 5a and 5b, respectively. The position of the opening 7b is directly opposite the hanging piece 4b in the vertical direction, so that when the inner and outer sashes 1 and 2 are attached to the lower frame 1b, the hanging piece 4b is inserted through the opening 7b. The airtight seal 60, held by the airtight seal holder 6b, is in elastic contact with the interior side of the swallowed hanging piece 4b, thereby suppressing rattling when the interior and exterior sashes 1 and 2 are opened and closed. 【0029】 [Manufacturing method for barrier-free building fixtures] Next, the manufacturing method of barrier-free building fixture A will be explained with reference to Figures 7 and 8. Barrier-free building component A is manufactured using existing non-barrier-free building component C shown in Figure 7(a). By adding a barrier-free structure B to the existing non-barrier-free building component C, the existing non-barrier-free building component is transformed into barrier-free building component A. Barrier-free building fixture A has the same configuration as non-barrier-free building fixture C, with the interior and exterior sliding doors 1 and 2 and window frame 3 being the same. It is manufactured by providing a barrier-free structure B having the aforementioned components to the common interior and exterior sliding doors 1 and 2 and window frame 3. In the following explanation, since the configurations of the inner and outer shoji screens 1 and 2 are the same, some process diagrams will only illustrate and explain the inner shoji screen 1. 【0030】 Step 1: Remove the inner and outer sliding doors 1 and 2 from the lower frame 3b of the existing non-barrier-free door C shown in Figure 7(a), and remove the door rollers c1 from the lower rails 1b and 2b as shown in Figure 7(b). Step 2: Remove the cover members c2, c3 and rail support members c4, c5 from the lower frame 3b of the existing non-barrier-free door C shown in Figure 7(a), as shown in Figure 7(c). This makes it possible to attach the aforementioned components of barrier-free structure B to the lower frame 1b and lower frame 3b. 【0031】 Steps 3 and beyond involve installing barrier-free structure B. Step 3: As shown in Figure 8(a) (the state in Figure 8(b)), the lower frame auxiliary material 4 is fitted into the recesses 10b and 20b from the underside of the lower frame 1b, and the upper wall 40a of the lower frame auxiliary material 4 is brought into contact with the upper walls 11b and 21b of the recesses 10b and 20b and fixed in place with screws (not shown). By attaching the lower frame support material 4 to the lower frame 1b, a hanging piece 4b is provided on the lower frame 1b. 【0032】 Step 4: As shown in Figure 8(b), the door roller f is fitted into the lower frame auxiliary material 4a from below. When fitting the door roller f, as described above, the door roller f is passed through the through hole 400 in the upper wall 40 of the lower frame auxiliary material 4 and the through hole 12b in the upper wall 11b of the recess 10b. Furthermore, when the roller f penetrates, the contact portion 10f of the adapter 1f comes into contact with the upper wall 130 of the hollow portion 13b (as shown in Figure 4), thereby the roller f is held in place by being sandwiched between the bottom frame 1b and the bottom frame auxiliary material 4, as described above. Through these third and fourth steps, one of the barrier-free structures B can be provided to the interior sliding door 1, as shown in Figure 8(c). 【0033】 Step 5: As shown in Figure 8(d), lower frame auxiliary members 5a, 5b, and flat member 5c are attached to the outdoor recess 300, intermediate recess 301, and indoor recess 302 of the lower frame 3b, respectively, and rail auxiliary members 6 for barrier-free structure B are attached to the upper ends of the indoor rail 30b and the outdoor rail 31b. In other words, by attaching the lower frame support material 5a, the lower frame support material 5b, and the flat material 5c, the outdoor recess 300, the intermediate recess 301, and the indoor recess 302 are raised, making the inner circumference of the lower frame 3b approximately flush with the surface. Furthermore, by attaching the rail support material 6, a guide groove 7 can be formed in the lower frame 3b. This fifth step allows the other barrier-free structure B to be provided on the lower frame 3b. 【0034】 Step 6: As shown in Figure 8(e), the inner and outer sliding doors 1 and 2, which have one side of the barrier-free structure B installed in Step 4, are attached to the lower frame 3b, which has the other side of the barrier-free structure B installed in Step 5. At this time, by placing the roller 2f of the door roller f on the guide projection 6a of the rail support material 6, the hanging piece 4b of the lower frame support material 4 can be inserted into the guide groove 7. This sixth step allows for the construction of barrier-free building component A. 【0035】 Through the above steps 1 to 6, barrier-free building components A can be manufactured from existing non-barrier-free building components C. In other words, since barrier-free fixture A shares some components with existing non-barrier-free fixture C, manufacturing costs can be reduced. Furthermore, the barrier-free building component A manufactured using this method allows the inner circumference of the lower frame 3b to have minimal irregularities and be almost flush with the surface. 【0036】 Although the building components of the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and any design changes, etc., that do not depart from the spirit of the present invention are also included. 【0037】 Furthermore, the aforementioned embodiments can be combined by utilizing each other's technologies, as long as there are no particular contradictions or problems in their purpose, configuration, etc. [Explanation of symbols] 【0038】 A: Barrier-free building fixtures B: Barrier-free structure a: skeleton a1: opening a2: Floor surface 1: Inner shoji screen (shoji screen) 1a: Upper stile 1b: Lower stile 1c: Stiles 1d: Stiles 1e: Panel 10b: recess 11b: Upper wall 12b: Through hole 13b: Hollow part 100: Engaging part 101: Engaging part 130: Upper wall 131: Upper wall 2: Outer shoji screen (shoji screen) 2a: Upper stile 2b: Lower stile 2c: Stiles 2d: Stiles 2e: Panel 20b: Recess 21b: Upper wall 23b: Hollow part 22b: Through hole 3: Window frame 3a: Upper frame 3b: Bottom frame 3c: Vertical frame 3d: Vertical frame 30b: Indoor rail 31b: Outdoor rail 300: Outdoor side recess 301: Intermediate recess 302: Interior side recess 303:Outdoor wall 4: Lower stile auxiliary material 4a: Fitting part 4b: Hanging piece 40a: Upper wall 41a: Wall surface 42a: Wall surface 400: Through hole 401: Protrusion 402: Fitting recess 403: Fitting hole 404: Fitting hole f: Door roller 1f: Adapter 10f: Contact part 11f: Engagement protrusion 2f: Laura 5a: Outdoor lower frame support material (lower frame support material) 5b: Lower frame support material for the middle section (lower frame support material) 5c: Flat material 50a: Top part 50b:Top part 50c:Top part 51a: Fixed wall 51b: Support wall 52a: Support wall 52b: Support wall 6: Rail support material 6a: Guide convex strip 6b: Airtight material holding section 60: Airtight material 7: Guide groove 7a: Swallowing space 7b: Opening C: Non-barrier-free fixtures c1: Door roller c2: Cover component c3: Cover component c4: Rail support material c5: Rail support material
Claims
[Claim 1] It comprises a lower frame and lower frame mounting members. The lower frame has an outdoor rail and an indoor rail. The lower frame mounting members come in two types: a non-barrier-free member with a large step difference from the rail and a barrier-free member with a small step difference from the rail. It is possible to replace non-barrier-free components with barrier-free components. The barrier-free components include an intermediate lower frame support member installed between the rails and a rail support member installed at the upper end of the indoor rail, with the hanging piece of the sliding door positioned between the intermediate lower frame support member and the rail support member. The rail support material engages only with the upper end of the rail and is held only at the upper end of the rail. A type of joinery characterized by its features. [Claim 2] It comprises a lower frame and lower frame mounting members. The lower frame has an outdoor rail and an indoor rail. The lower frame mounting members come in two types: a non-barrier-free member with a large step difference from the rail and a barrier-free member with a small step difference from the rail. The barrier-free components include an intermediate lower frame support member installed between the rails and a rail support member installed at the upper end of the indoor rail, with the hanging piece of the sliding door positioned between the intermediate lower frame support member and the rail support member. The rail support material engages only with the upper end of the rail and is held only at the upper end of the rail. It is possible to replace barrier-free components with non-barrier-free components. A type of joinery characterized by its features. [Claim 3] It comprises a lower frame and lower frame mounting members. The lower frame has an outdoor rail and an indoor rail. The lower frame mounting members come in two types: a non-barrier-free member with a large step difference from the rail and a barrier-free member with a small step difference from the rail. The barrier-free components include an intermediate lower frame support member installed between the rails and a rail support member installed at the upper end of the indoor rail, with the hanging piece of the sliding door positioned between the intermediate lower frame support member and the rail support member. The rail support material engages only with the upper end of the rail and is held only at the upper end of the rail. It is possible to select and install either non-barrier-free components or barrier-free components. A type of joinery characterized by its features. [Claim 4] The non-barrier-free component includes an interior cover member disposed in the interior recess and an intermediate cover member disposed in the intermediate recess. The barrier-free component has an interior lower frame auxiliary material that raises the interior recess. A building fitting according to any one of claims 1 to 3.