Fittings

Abstract

To provide a fitting that is not easily deformed even if thermal elongation due to fire disaster occurs.SOLUTION: A fitting comprises: a frame body; a top rail; a bottom rail; a face bar; a pair of stiles 23, 24, which have grooves 1A, 1B, respectively, on the other stiles 24, 23 sides of each other; a crosspiece 25 whose both ends are assembled to the pair of stiles 23, 24; and a sash fitted to the frame body. The pair of grooves 1A, 1B have a pair of lateral surfaces 2A, 2B between which an end of the crosspiece 25 can be inserted, and bottom surfaces 3A, 3B that are connected orthogonal to the pair of lateral surfaces. Both ends of the crosspiece 25 are inserted in the pair of grooves 1A, 1B, respectively. A resin block 70 having a cylindrical projection is disposed between at least one end of the crosspiece 25 and one bottom surface 1A.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to building materials. [Background technology]

[0002] Conventionally, shoji screens with a middle sash have been widely used. By having a middle sash, the strength of the entire shoji screen is improved compared to when the surface material is held in place by only the frame. The middle sash is configured to be interposed between a pair of vertical frames that make up the shoji screen. In Patent Document 1, a resin block is placed in the groove of the vertical frame, and the middle sash and vertical frame are screwed together via the block, thereby attaching the middle sash to the vertical frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 01-013744 Summary of the Invention [Problem to be solved by the invention]

[0004] A problem with metal sashes such as aluminum is that when heated, the components expand and thermally expand. When thermal expansion occurs, forces are applied between contacting components, which can lead to deformation. In Patent Document 1, the central sash is configured to abut against the vertical stile, so when the central sash is heated, thermal expansion applies a force in a direction that pushes the vertical stile apart, which can cause deformation of the vertical stile or the central sash itself.

[0005] In particular, in the event of a fire, metal sashes are prone to high temperatures, which can cause deformation of the fixtures. When the fixtures deform, gaps can appear between the frame and components. From a fire prevention perspective, it is preferable to minimize gaps in the fixtures to prevent the fire from spreading. Therefore, there is a demand for fixtures that are less likely to deform even when thermal expansion occurs due to a fire. [Means for solving the problem]

[0006] The present disclosure provides a fitting having a frame body, an upper frame, a lower frame, a face material, a pair of vertical frames each having a groove portion on the other vertical frame side, a middle bar whose both ends are assembled to the pair of vertical frames, and a shoji screen attached to the frame body, wherein the pair of groove portions each have a pair of side portions into which the middle bar can be inserted, and a bottom surface portion that is connected perpendicular to the pair of side portions, both ends of the middle bar are inserted and positioned in the pair of groove portions, at least one end of the middle bar and one of the bottom surfaces face each other with a thermal expansion allowance for the middle bar between them, and a resin block with a cylindrical protrusion is positioned in the thermal expansion allowance. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a sliding shoji screen according to a first embodiment. [Figure 2] This is a diagram showing the horizontal cross section of the upper surface of the middle rail and the vertical stile when a screw with threads along its entire length is used. [Figure 3] FIG. 2 is a view showing a vertical cross section of a center rail according to the first embodiment. [Figure 4A] 3A and 3B are diagrams showing a resin block and a bracket according to the first embodiment. [Figure 4B] 3A and 3B are diagrams showing a resin block and a bracket according to the first embodiment. [Figure 5] 1 is a diagram showing a horizontal cross section of the upper surface of the center rail and the vertical stile of the first embodiment. FIG. [Figure 6] 4A and 4B are diagrams showing an assembly screw according to the first embodiment. [Figure 7] FIG. 2 is a diagram showing a horizontal cross section of the vertical stile and frame of the sliding shoji screen of the first embodiment. [Figure 8] FIG. 10 is a diagram showing a shoji screen according to a second embodiment. [Figure 9] FIG. 10 is a diagram showing a horizontal cross section of the upper surface of the center rail and the vertical stile of the second embodiment. [Figure 10] FIG. 10 is a view showing a vertical cross section of a center rail according to the second embodiment. [Figure 11] FIG. 10 is a diagram showing a resin block according to a second embodiment. [Figure 12]FIG. 10 is a horizontal view of a resin block according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] First Embodiment As shown in Fig. 1, the fitting 100 according to the first embodiment of the present disclosure is a sliding shoji screen comprising a frame 10 and two shoji screens 20, 30. In this embodiment, the fitting 100 constitutes a window that separates the interior and exterior of a building, but there are no particular limitations on the location or size of the fitting 100. The fitting 100 can be applied without any problems in any location where sliding windows or sliding doors have traditionally been used.

[0009] The frame body 10 is formed by framing an upper frame 11, a lower frame 12, a vertical frame 14 on the inner shoji screen 20 side, and a vertical frame 13 on the outer shoji screen 30 side on all four sides. The frame body 10 is configured to be large enough to hold the inner shoji screen 20 and the outer shoji screen 30 within the frame, and is placed at the edge of an opening in the wall of a building. The frame body 10 can be made of a metal material such as aluminum that has high strength. For example, in this embodiment, the upper frame 11, the lower frame 12, the vertical frame 13, and the vertical frame 14 are extruded aluminum profiles.

[0010] The two shoji screens 20, 30 are the inner shoji screen 20, which is located on the indoor side of the building, and the outer shoji screen 30, which is located on the outdoor side of the building. Each of the two shoji screens 20, 30 has a pair of vertical frames, each consisting of an upper frame 21, 31, a lower frame 22, 32, a vertical frame 23, 33 on the vertical frame 14, 13 side, and a vertical frame 24, 34 on the joining side, a middle sash 25, 35 assembled approximately midway between the pair of vertical frames, and face plates 26, 36 surrounded and held by the frame and middle sash 25, 35. In this embodiment, the frame and middle sash 25, 35 are made of aluminum, and the face plates 26, 36 are made of glass. The two shoji screens 20, 30 are configured to be opened and closed by sliding relative to the frame 10, and can be locked with a crescent lock 40.

[0011] The configuration of the shoji screen of the present disclosure described below can be applied to both the inner shoji screen and the outer shoji screen, and therefore, for the sake of brevity, the following description of this embodiment will focus on the inner shoji screen 20 only.

[0012] As shown in Figure 2, the middle sash 25 of the inner shoji screen 20 is assembled to a pair of vertical frames 24, 23 as described above. Each of the pair of vertical frames 23, 24 has a groove 1A, 1B on the other side of the vertical frame 24, 23, and both ends of the middle sash 25 are inserted into the groove 1A, 1B. Each of the grooves 1A, 1B has a pair of side faces 2A, 2B into which the middle sash 25 can be inserted, and a bottom face 3A, 3B that is connected perpendicularly to the pair of side faces 2A, 2B. One end of the middle sash 25 is inserted into the groove 1A and faces the bottom face 3A, with a resin block 70 interposed between them. The other end of the middle sash 25 is inserted between the side faces 2B of the groove 1B and faces the bottom face 3B.

[0013] The resin block 70 has a screw hole in the fitting portion 73 for assembling one end of the middle crosspiece 25 and the vertical stile 23, and is screwed together with one end of the middle crosspiece 25 to the vertical stile 23. The resin block 70 is made of thermoplastic resin and melts and softens when heated by a fire or other heat. Simultaneously with a fire, the metal middle crosspiece 25 heats up and expands, causing thermal elongation. Therefore, the thermally elongated middle crosspiece 25 can penetrate into the position of the resin block 70 that has softened due to the high temperature. In other words, the resin block 70 interposed between one end of the middle crosspiece 25 and the bottom surface portion 3A provides a thermal elongation allowance for the middle crosspiece 25. This ensures a thermal elongation allowance for the middle crosspiece 25, reducing the force applied when the thermally elongated middle crosspiece 25 strikes the vertical stile 23 and suppressing deformation of the vertical stile 23.

[0014] The other end of the middle crosspiece 25 is inserted into the groove 1B and is disposed so as to abut against the bottom surface 3B. As a result, when the middle crosspiece 25 thermally expands, it receives force from the bottom surface 3B, and the side surface 2A acts as a guide to regulate the direction of thermal expansion, so that the middle crosspiece 25 is more likely to thermally expand toward the thermal expansion allowance.

[0015] The bottom surface portion 3B faces the other end of the middle crosspiece 25 on its front surface (the right surface in FIG. 2 ), and has a first reinforcing member 90 extending vertically along the vertical stile 24 on its back surface (the left surface in FIG. 2 ). In FIG. 2 , the vertical stile 24 has a hollow portion 27 on the back surface side of the bottom surface portion 3B. The first reinforcing member 90 is disposed inside the hollow portion 27 and extends vertically along the vertical stile 24 to reinforce the bottom surface portion 3B and restrict deformation. The cross-sectional shape of the first reinforcing member 90 is not limited to the U-shape shown in FIG. 2 , as long as it reinforces the bottom surface portion 3B and restricts deformation. The horizontal cross section of the first reinforcing member 90 may be rectangular, for example. The material constituting the first reinforcing member 90 is not particularly limited. The first reinforcing member 90 may be made of stainless steel, for example. This makes the bottom surface portion 3B less likely to deform, and therefore the middle crosspiece 25 is more likely to receive force from the bottom surface portion 3B toward the thermal elongation allowance, making the middle crosspiece 25 more likely to thermally elongate toward the thermal elongation allowance.

[0016] The middle rail 25 includes a second reinforcing member 60 extending along the middle rail 25. As shown in FIG. 3, the second reinforcing member 60 has a U-shaped vertical cross section that extends along the top and side surfaces of the middle rail 25, reinforcing the middle rail 25 and restricting deformation. The cross-sectional shape of the second reinforcing member 60 is not limited to the U-shaped cross section shown in FIG. 3, as long as it reinforces the middle rail 25 and restricts deformation. The horizontal cross section of the second reinforcing member 60 may be rectangular, for example. The material constituting the second reinforcing member 60 is not particularly limited. The second reinforcing member 60 may be made of stainless steel, for example. This improves the strength of the middle rail 25, making it less prone to warping, and restricts deformation in directions other than the extension direction of the middle rail 25, making the middle rail 25 more susceptible to thermal elongation toward its thermal elongation allowance.

[0017] 4A and 4B, resin block 70 is configured with an assembly portion 71 to which bracket 80 is attached, and a fitting portion 73 having a cylindrical protrusion that fits into vertical stile 23 for assembly. Vertical stile 23 has an assembly hole for fitting into fitting portion 73 for assembly, and fitting portion 73 is inserted into the assembly hole to fit. Fitting portion 73 has a screw hole inside the cylindrical protrusion, and vertical stile 23 and center crosspiece 25 are assembled by screwing through the screw hole inside the cylindrical protrusion of fitting portion 73.

[0018] An assembly screw 78 is used to assemble the vertical stile 23 and the middle crosspiece 25 shown in FIG. 2. The assembly screw 78 has a screw head 75 and a thread portion 77 formed over the entire length of the screw. The assembly screw 74 assembles the vertical stile 23 and the middle crosspiece 25 through a threaded hole inside a cylindrical protrusion of the fitting portion 73 of the resin block 70. As a result, the assembly hole of the vertical stile 23 is configured to have a larger diameter than the assembly screw 74, and the cylindrical resin protrusion is positioned in the gap between the assembly screw 78 and the assembly hole. This melts the cylindrical resin protrusion at high temperatures, providing room for the thread portion 77 to move, and prevents the thread portion 77 from getting caught in the assembly hole when the middle crosspiece 25 thermally expands.

[0019] An assembly screw 74 is used to assemble the vertical stile 23 and the middle crosspiece 25 shown in Figure 5. As shown in Figure 6, the assembly screw 74 has a flat portion 76 without threads between the screw head 75 and the threaded portion 77. The assembly screw 74 assembles the vertical stile 23 and the middle crosspiece 25 through a threaded hole inside the cylindrical protrusion of the fitting portion 73 of the resin block 70. Note that although the form shown in Figure 5 has a cylindrical protrusion, because the assembly screw 74 has the flat portion 76, the flat portion 76 will not get caught in the assembly hole of the vertical stile 23 even if the resin block 70 does not have a cylindrical protrusion portion.

[0020] The metal bracket 80 has a U-shaped cross section and includes a screw hole 81 for assembling the resin block 70 to the vertical frame 23, and a pair of guide portions 82 that fit into and connect to the second reinforcing member 60. The bracket 80 fits into the fitting portion of the resin block 70 to form a single unit. The guide portions 82 fit into the second reinforcing member 60. This aligns the thermal expansion of the middle crosspiece 25 with the guide portions 82, more reliably guiding it to the resin block 70, i.e., the thermal expansion allowance. Furthermore, the metal bracket 80 remains even if the resin block 70 melts and softens due to the high temperature caused by a fire, and can continue to guide the thermal expansion of the middle crosspiece 25. It can also support the load of the second reinforcing member 60.

[0021] The fitting 100 may also have other reinforcing materials to prevent deformation. For example, as shown in Figure 7, the outer shoji screen 30 also has a hollow portion in the joint frame 34 and has a first reinforcing material 90. The joint frame 34 further has a third reinforcing material 91 with an L-shaped horizontal cross section in the groove portion 4B. This causes the joint frame 34 to deform in a direction that widens the opening of the groove portion 4B, reducing the force holding the surface material 36 and preventing the surface material 36 from falling.

[0022] The fitting 100 according to the first embodiment of the present disclosure has been described. The fitting 100 provides the following effects.

[0023] The building material 100 is a building material having a frame body 10, an upper frame 21, a lower frame 22, a surface material 26, a pair of vertical frames 23, 24 each having a groove 1A, 1B on the other side of the vertical frames 24, 23, a middle sash 25 whose both ends are assembled to the pair of vertical frames 23, 24, and a shoji screen 20 attached to the frame body 10, wherein the pair of grooves 1A, 1B each have a pair of side portions 2A, 2B into which the end of the middle sash 25 can be inserted, and a bottom portion 3A, 3B which is connected perpendicular to the pair of side portions, and both ends of the middle sash 25 are inserted into the pair of grooves 1A, 1B, respectively, and at least one end of the middle sash 25 and one of the bottom portions 1A face each other with a thermal expansion allowance for the middle sash 25 between them, and a resin block 70 having a cylindrical protrusion is placed in the thermal expansion allowance. This allows the resin block to melt when it becomes hot in the event of a fire, and by ensuring that the middle bar has room to expand due to heat, the force applied when the expanded middle bar hits the vertical frame can be reduced, thereby suppressing deformation of the vertical frame.

[0024] One of the bottom surfaces 3A has an assembly hole for inserting a resin block 70, and the cylindrical protrusion is inserted into the assembly hole, and an assembly screw 78 is attached to the cylindrical protrusion between a screw head 75 and a thread portion 77. As a result, the assembly hole in the vertical stile is configured to be larger in diameter than the assembly screw, and the resin cylindrical protrusion is positioned in the gap between the assembly screw and the assembly hole, so that the thread will not get caught in the assembly hole when the middle crosspiece is thermally stretched.

[0025] The other end of the middle crosspiece 25 is arranged to abut against the other bottom surface portion 3B. As a result, when the middle crosspiece 25 thermally expands, it receives force from the bottom surface portion 3B, and the side surface portion acts as a guide to regulate the direction of thermal expansion, making it easier for the middle crosspiece to thermally expand toward the thermal expansion allowance.

[0026] The other bottom surface portion 3B faces the other end of the middle crosspiece 25 on its front surface, and has a first reinforcing member 90 on its back surface that extends along the vertical frame 24 or vertical frame 13 and restricts deformation of the bottom surface portion 3B. This makes the other bottom surface portion less likely to deform, making the middle crosspiece more likely to receive force from the other bottom surface portion toward the thermal elongation allowance, and making it easier for the middle crosspiece to thermally elongate toward the thermal elongation allowance.

[0027] Inside the central crosspiece 25, there is further provided a second reinforcing member 60 that extends along the central crosspiece 25 and restricts deformation of the central crosspiece 25. This improves the strength of the central crosspiece and makes it less susceptible to warping, making it easier for the central crosspiece to thermally expand toward the thermal expansion allowance.

[0028] The fitting 100 is placed between one end 25 of the central sash and one bottom surface portion 3A, and the resin block 70 has a metal bracket 80 that fits and connects to the second reinforcing member 60. This allows the thermal expansion of the central sash to be aligned with part of the bracket, more reliably guiding it to the thermal expansion allowance. Furthermore, the metal bracket remains even if the resin block melts and softens due to the high temperature caused by a fire, allowing it to continue guiding the thermal expansion of the central sash. It can also support the load of the second reinforcing member 60.

[0029] Second Embodiment The first embodiment of the present disclosure has been described above. Next, a second embodiment of the present disclosure will be described. The fitting 200 according to the second embodiment of the present disclosure is a fixed window. In other words, compared to the fitting 100 according to the first embodiment, the fitting 200 does not have a frame and is configured so that it cannot be opened or closed. In addition, the shape of the resin block 170 is different, and the fitting does not have a bracket or a first reinforcing member.

[0030] 8, a fitting 200 according to a sixth embodiment of the present disclosure is a fixed window comprising a frame 110 and a window portion 120. In this embodiment, the fitting 200 constitutes a window that separates the interior and exterior of a building, and there are no particular limitations on the location or size of the fitting 200 to be applied.

[0031] The frame body 110 is formed by framing an upper frame 111, a lower frame 112, a vertical frame 113, and a vertical frame 114 on all four sides. The frame body 110 is configured to be large enough to hold the middle crosspiece 125 and the facing material 126 within the frame, and is placed at the edge of an opening in the wall of a building. The frame body 110 can be formed, for example, from a metal material such as aluminum that has high strength. For example, in this embodiment, the upper frame 11, the lower frame 12, the vertical frame 13, and the vertical frame 14 are extruded aluminum members.

[0032] The fitting 200 has a middle sash 125 and a face material 126 that is surrounded and held by the frame 110 and the middle sash 125. In this embodiment, the frame 110 and the middle sash 125 are made of aluminum, and the face material 126 is made of glass. The fitting 200 is a fixed window that cannot be opened or closed, and is installed for the purpose of adding design to a building and for the purpose of letting in light.

[0033] As shown in FIG. 9 , the middle rail 125 is assembled to the pair of vertical frames 113, 114 as described above. The pair of vertical frames 113, 114 each have grooves 101A, 101B on the side of the other vertical frame 114, 113. Each of the grooves 101A, 101B has a pair of side surfaces 102A, 102B into which the middle rail 125 can be inserted, and bottom surfaces 103A, 103B that are perpendicularly connected to the pair of side surfaces 102A, 102B. One end of the middle rail 125 is inserted between the pair of side surfaces 102A and faces the bottom surface 103A, with a resin block 170 interposed between them. The other end of the middle rail 125 is inserted between the side surfaces 102B and faces the bottom surface 103B.

[0034] The resin block 170 has a fitting portion 173 inside the cylindrical protrusion that has a screw hole for assembling one end of the middle crosspiece 125 and the vertical frame 113, and is assembled by screwing it to the vertical frame 113 together with one end of the middle crosspiece 125. The resin block 170 is made of thermoplastic resin and melts and softens when it becomes hot due to a fire or other such event. When a fire breaks out, the metal middle crosspiece 125 also becomes hot and expands, causing thermal elongation. Therefore, the thermally elongated middle crosspiece 125 can enter the position of the resin block 170 that has become softened by the high temperature. In other words, the resin block 170 interposed between one end of the middle crosspiece 125 and the bottom surface portion 103A provides a thermal elongation allowance for the middle crosspiece 125. This ensures a thermal elongation allowance for the middle crosspiece.

[0035] The other end of the middle crosspiece 125 is inserted into the groove 101B and is disposed so as to abut against the bottom surface 103B (not shown). As a result, when the middle crosspiece 125 thermally expands, it receives force from the bottom surface 103B, and the side surface acts as a guide to regulate the direction of thermal expansion, making it easier for the middle crosspiece to thermally expand toward the thermal expansion allowance.

[0036] Inside the middle rail 125 is a second reinforcing member 160 extending along the middle rail 125. As shown in FIG. 10, the second reinforcing member 160 is formed with an L-shaped vertical cross section along the middle rail 125, reinforcing the middle rail 125 and restricting deformation. The second reinforcing member 160 is not limited to an L-shaped cross section as shown in FIG. 10, as long as it reinforces the middle rail 125 and restricts deformation. For example, the horizontal cross section of the second reinforcing member 160 may be rectangular. There is no particular restriction on the material constituting the second reinforcing member 160. The second reinforcing member 160 is made of stainless steel, for example. This improves the strength of the middle rail, making it less likely to warp, and restricts deformation in directions other than the extension direction of the middle rail, making it more likely to thermally elongate toward the thermal elongation allowance.

[0037] As shown in Fig. 11, the resin block 170 is configured to have a fitting portion 171 and a fitting portion 173 that has a cylindrical protrusion and is fitted into the vertical frame 113 for assembly. The vertical frame 113 has an assembly hole for fitting into the fitting portion 173 for assembly, and the fitting portion 173 is inserted into the assembly hole to fit. The fitting portion 173 has a screw hole inside the cylindrical protrusion, and the vertical frame 113 and the middle crosspiece 125 are assembled by screwing them into the screw hole in the fitting portion 173, as shown in Fig. 12. The fitting portion 171 is fitted into the middle crosspiece 125 or the second reinforcing member 160.

[0038] The fitting 200 according to the second embodiment of the present disclosure has been described. The fitting 200 provides the following effects.

[0039] The fitting 200 is a fitting having a frame body 110 consisting of an upper frame 111, a lower frame 112, and a pair of vertical frames 113, 114 each having a groove portion 101A, 101B on the other side of the vertical frame 114, 113, a middle sash 125 whose both ends are assembled to the pair of vertical frames 113, 114, and a surface material 126 held by the frame body 110 and the middle sash 125, and the pair of groove portions 101A, 101B are both The frame has a pair of side surfaces 102A, 102B that can be inserted between them, and bottom surfaces 103A, 103B that are connected perpendicular to the pair of side surfaces, and both ends of the middle crosspiece 125 are inserted into the pair of grooves 101A, 101B, respectively, and at least one end of the middle crosspiece 125 and one of the bottom surfaces 101A face each other with a thermal expansion allowance for the middle crosspiece 125 between them, and a resin block 70 with a cylindrical protrusion is placed in the thermal expansion allowance. As a result, the resin block, which becomes hot when a fire breaks out, melts, and by ensuring a thermal expansion allowance for the middle crosspiece, the force applied when the thermally expanded middle crosspiece hits the vertical frame can be reduced, and deformation of the vertical frame can be suppressed.

[0040] Although the first and second embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments. Appropriate modifications and improvements of the above embodiments are also included in the present disclosure.

[0041] In the modified example of the present disclosure, for example, the second embodiment may have a bracket and a first reinforcing member similar to the first embodiment, and the second reinforcing member and the resin block may be formed in a U-shape instead of an L-shape. Additionally, resin blocks may be disposed on both ends of the center rail instead of only one end. [Explanation of symbols]

[0042] 1A, 1B...Groove portion, 2A, 2B...Side portion, 3A, 3B...Bottom portion, 4A, 4B...Groove portion, 5A, 5B...Side portion, 6A, 6B...Bottom portion, 10...Frame body, 11...Upper frame, 12...Lower frame, 13...Vertical frame, 14...Vertical frame, 20...Inner shoji screen, 21...Upper frame, 22...Lower frame, 23...Vertical frame, 24...Joint frame, 25...Middle crosspiece, 26...Face material, 30...Inner shoji screen, 31...Upper frame, 32...Lower frame, 33...Vertical frame, 34...Joint frame, 35...Middle crosspiece, 36...Face material, 40...Crescent lock, 50...Outdoor side of middle crosspiece, 51...Indoor side of middle crosspiece, 60...Second reinforcing material, 70...Resin block, 71...Assembly portion, 73...Fitting portion, 74...assembly screw, 75...screw head, 76...flat portion, 77...thread portion, 78...assembly screw, 80...bracket, 81...hole portion, 82...guide portion, 90...first reinforcing member, 91...third reinforcing member, 101A, 101B...groove portion, 102A...side portion, 103A...bottom portion, 110...frame body, 111...upper frame, 112...lower frame, 113...vertical frame, 114...vertical frame, 125...middle crosspiece, 126...face material, 150...outdoor side of middle crosspiece, 151...indoor side of middle crosspiece, 160...second reinforcing member, 161...upper end portion, 162...horizontal portion, 170...resin block, 171...fitting portion, 173...fitting portion

Claims

1. A frame body, A fitting having an upper frame, a lower frame, a surface material, a pair of vertical frames each having a groove on the other vertical frame side, and a metal center rail whose both ends are assembled to the pair of vertical frames, and a shoji screen attached to the frame body, Each of the pair of grooves has a pair of side surfaces into which the middle rail can be inserted, and a bottom surface connected perpendicularly to the pair of side surfaces, Both ends of the center rail are inserted into the pair of grooves, At least one end surface of the middle rail is disposed on one surface of the pair of vertical frames with a space therebetween, a resin block having a cylindrical protrusion and capable of being melted and softened by heat is disposed between at least one end of the middle rail and one of the bottom surfaces; The bottom surface of one of the base portions has an assembly hole for inserting the resin block, and the cylindrical protrusion is inserted into the assembly hole. A fitting, in which an assembly screw is assembled to the cylindrical protrusion, and the outer diameter of the cylindrical protrusion is smaller than the outer diameter of the screw head of the assembly screw.

2. A frame body including an upper frame, a lower frame, and a pair of vertical frames each having a groove on the other vertical frame side; A metal middle rail whose both ends are attached to the pair of vertical frames; A fitting having a surface material held by the frame body and the middle rail, Each of the pair of grooves has a pair of side surfaces into which the middle rail can be inserted, and a bottom surface connected perpendicularly to the pair of side surfaces, Both ends of the center rail are inserted into the pair of grooves, At least one end surface of the middle rail is disposed on one surface of the pair of vertical frames with a space therebetween, a resin block having a cylindrical protrusion and capable of being melted and softened by heat is disposed between at least one end of the middle rail and one of the bottom surfaces; The bottom surface of one of the base portions has an assembly hole for inserting the resin block, and the cylindrical protrusion is inserted into the assembly hole. A fitting, in which an assembly screw is assembled to the cylindrical protrusion, and the outer diameter of the cylindrical protrusion is smaller than the outer diameter of the screw head of the assembly screw.

3. A frame body, A fitting having an upper frame, a lower frame, a surface material, a pair of vertical frames each having a groove on the other vertical frame side, and a metal center rail whose both ends are attached to the pair of vertical frames, and a shoji screen attached to the frame body, Each of the pair of grooves has a pair of side surfaces into which the middle rail can be inserted, and a bottom surface connected perpendicularly to the pair of side surfaces, Both ends of the center rail are inserted into the pair of grooves, At least one end surface of the middle rail is disposed on one surface of the pair of vertical frames with a space therebetween, a resin block having a cylindrical protrusion and capable of being melted and softened by heat is disposed between at least one end of the middle rail and one of the bottom surfaces; One end of the middle rail and one of the vertical frames are assembled by an assembly screw, The assembly screw has a flat portion without threads between the screw head and the threaded portion, The bottom surface of one of the base portions has an assembly hole for inserting the resin block, and the cylindrical protrusion is inserted into the assembly hole. The assembly screw is assembled to the cylindrical protrusion, and the outer diameter of the cylindrical protrusion is smaller than the outer diameter of the screw head of the assembly screw.

4. A frame body including an upper frame, a lower frame, and a pair of vertical frames each having a groove on the other vertical frame side; A metal middle rail whose both ends are attached to the pair of vertical frames; A fitting having a surface material held by the frame body and the middle rail, Each of the pair of grooves has a pair of side surfaces into which the middle rail can be inserted, and a bottom surface connected perpendicularly to the pair of side surfaces, Both ends of the center rail are inserted into the pair of grooves, At least one end surface of the middle rail is disposed on one surface of the pair of vertical frames with a space therebetween, a resin block having a cylindrical protrusion and capable of being melted and softened by heat is disposed between at least one end of the middle rail and one of the bottom surfaces; One end of the central rail and one of the vertical frames are assembled with an assembly screw, The assembly screw has a flat portion without threads between the screw head and the threaded portion, The bottom surface of one of the base portions has an assembly hole for inserting the resin block, and the cylindrical protrusion is inserted into the assembly hole. The assembly screw is assembled to the cylindrical protrusion, and the outer diameter of the cylindrical protrusion is smaller than the outer diameter of the screw head of the assembly screw.

5. The fixture according to any one of claims 1 to 4, wherein the other end of the middle rail is positioned to abut against the other bottom surface portion.

6. The other bottom portion faces the other end of the middle rail on its front surface and has a first reinforcing member on its back surface extending along the vertical frame or vertical frame to regulate deformation of the bottom portion.

7. The fixture according to any one of claims 1 to 6, further comprising a second reinforcing member inside the middle rail, extending along the middle rail and restricting deformation of the middle rail.

8. The fixture according to claim 7 , wherein the resin block has a metal bracket extending toward the second reinforcing material and fittingly connecting to the second reinforcing material.

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