JP7612337B2 - Fittings - Google Patents

Description

The present invention relates to building materials.

Traditionally, shoji screens with a middle bar have been widely used. By having a middle bar, the strength of the entire screen is improved compared to when the surface material is held by the frame alone. The middle bar is interposed between a pair of vertical frames that make up the screen. In Patent Document 1, a resin block is placed in the groove of the vertical frame, and the middle bar is attached to the vertical frame by screwing the middle bar to the vertical frame via the block.

Japanese Utility Model Application Publication No. 01-013744

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

In particular, in the event of a fire, metal sashes are prone to becoming very hot, which can easily cause deformation of fittings. When fittings deform, gaps can appear between the frame and components. From a fire prevention perspective, it is preferable to keep gaps in fittings small to prevent the spread of fire. Therefore, fittings that are less likely to deform even when thermal expansion occurs due to a fire are required.

The present disclosure provides a fitting having a frame body, an upper frame, a lower frame, a facing, 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 perpendicularly 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 having a cylindrical protrusion is positioned in the thermal expansion allowance.

FIG. 2 is a diagram showing a sliding door according to the first embodiment. This figure shows a horizontal cross section of the upper surface of the middle rail and the vertical frame when a screw with a thread along its entire length is used. FIG. 2 is a diagram showing a vertical cross section of a center rail of the first embodiment. 3A and 3B are diagrams illustrating a resin block and a bracket according to the first embodiment. 3A and 3B are diagrams illustrating a resin block and a bracket according to the first embodiment. A diagram showing a horizontal cross section of the upper surface of the center rail and the vertical frame of the first embodiment. FIG. 4 is a diagram showing an assembly screw of the first embodiment. A figure showing a horizontal cross-section of the vertical frame and frame body of a sliding shoji screen in the first embodiment. FIG. 11 is a diagram showing a sash screen according to a second embodiment. A diagram showing a horizontal cross section of the upper surface of the center rail and the vertical frame of the second embodiment. FIG. 13 is a diagram showing a vertical cross section of a center rail of the second embodiment. FIG. 13 is a diagram showing a resin block according to a second embodiment. FIG. 11 is a horizontal view of a resin block according to a second embodiment.

First Embodiment
As shown in Fig. 1, the fitting 100 according to the first embodiment of the present disclosure is a sliding door comprising a frame 10 and two doors 20 and 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 problem in any location where sliding windows or sliding doors have traditionally been used.

The frame body 10 is formed by framing the upper frame 11, the lower frame 12, the vertical frame 14 on the inner screen 20 side, and the vertical frame 13 on the outer screen 30 side on all four sides. The frame body 10 is constructed to a size that can hold the inner screen 20 and the outer 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 constructed, 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 shapes.

The two shoji screens 20, 30 are the inner shoji screen 20, which is placed on the indoor side of the building, and the outer shoji screen 30, which is placed on the outdoor side of the building. Each of the two shoji screens 20, 30 has a pair of vertical frames consisting of upper frames 21, 31, lower frames 22, 32, vertical frames 23, 33 on the vertical frames 14, 13 side, and vertical frames 24, 34 on the joint side, as well as middle bars 25, 35 assembled at approximately the midpoint of the pair of vertical frames extending vertically, and surface materials 26, 36 surrounded and held by these frames and middle bars 25, 35. In this embodiment, the frames and middle bars 25, 35 are made of aluminum, and the surface materials 26, 36 are made of glass. The two shoji screens 20, 30 can be opened and closed by sliding relative to the frame 10, and can also be locked with a crescent lock 40.

The configuration of the screen of this disclosure described below can be applied to both the inner screen and the outer screen. Therefore, for the sake of brevity, the following will focus on the inner screen 20 only and describe this embodiment in detail.

As shown in FIG. 2, the middle rail 25 of the inner sash 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 vertical frame 24, 23 side, and both ends of the middle rail 25 are inserted into the groove 1A, 1B. Both grooves 1A, 1B are configured with a pair of side portions 2A, 2B between which the middle rail 25 can be inserted, and bottom portions 3A, 3B that are connected perpendicularly to the pair of side portions 2A, 2B. One end of the middle rail 25 is inserted into the groove 1A and faces the bottom portion 3A, with a resin block 70 interposed between them. The other end of the middle rail 25 is inserted between the side portions 2B of the groove 1B and faces the bottom portion 3B.

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 frame 23, and is screwed to the vertical frame 23 together with one end of the middle crosspiece 25. The resin block 70 is made of thermoplastic resin, and melts and softens when it becomes hot due to a fire or the like. At the same time, when a fire breaks out, the metal middle crosspiece 25 becomes hot and expands, causing thermal elongation. Therefore, the thermally expanded middle crosspiece 25 can enter the position of the resin block 70 that has become hot and softened. In other words, the resin block 70 interposed between one end of the middle crosspiece 25 and the bottom surface portion 3A becomes the thermal elongation allowance of the middle crosspiece 25. As a result, by ensuring the thermal elongation allowance of the middle crosspiece 25, the force applied by the thermally expanded middle crosspiece 25 hitting the vertical frame 23 can be reduced, and deformation of the vertical frame 23 can be suppressed.

The other end of the middle crosspiece 25 is inserted into the groove 1B and is positioned against the bottom surface 3B. As a result, when the middle crosspiece 25 thermally expands, it receives a force from the bottom surface 3B, and the side surface 2A acts as a guide to regulate the direction of thermal expansion, making it easier for the middle crosspiece 25 to thermally expand toward the thermal expansion allowance.

The bottom surface portion 3B faces the other end of the middle rail 25 on the front surface (the surface on the right side in FIG. 2), and has a first reinforcing member 90 extending vertically along the vertical frame 24 on the back surface (the surface on the left side in FIG. 2). In FIG. 2, the vertical frame 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, extends vertically along the vertical frame 24, and reinforces the bottom surface portion 3B to restrict deformation. The first reinforcing member 90 is not limited to a U-shaped cross-sectional shape as shown in FIG. 2, as long as it reinforces the bottom surface portion 3B to restrict deformation. The first reinforcing member 90 may have a rectangular horizontal cross section, for example. The material constituting the first reinforcing member 90 is not particularly limited. The first reinforcing member 90 is made of, for example, stainless steel. This makes it difficult for the bottom surface portion 3B to deform, so that the middle rail 25 is more likely to receive force from the bottom surface portion 3B toward the thermal elongation allowance, and the middle rail 25 is more likely to thermally elongate toward the thermal elongation allowance.

Inside the middle rail 25, there is a second reinforcing member 60 that extends along the middle rail 25. As shown in FIG. 3, the second reinforcing member 60 is formed in a U-shape in vertical cross section along the upper surface and side portion of the middle rail 25, reinforcing the middle rail 25 and restricting deformation. The second reinforcing member 60 is not limited to a U-shape in cross section as shown in FIG. 3, as long as it reinforces the middle rail 25 and restricts deformation. For example, the horizontal cross section of the second reinforcing member 60 may be rectangular. The material constituting the second reinforcing member 60 is not particularly limited. The second reinforcing member 60 is made of stainless steel, for example. This improves the strength of the middle rail 25 and makes it less likely to warp, and since deformation in directions other than the direction in which the middle rail 25 extends is restricted, the middle rail 25 is more likely to thermally expand toward the thermal expansion allowance.

As shown in Figures 4A and 4B, the resin block 70 is configured with an assembly portion 71 to which the bracket 80 is attached, and an engagement portion 73 having a cylindrical protrusion that engages with the vertical frame 23 for assembly. The vertical frame 23 has an assembly hole for engaging with the engagement portion 73 for assembly, and the engagement portion 73 is inserted into the assembly hole to engage. The engagement portion 73 has a screw hole inside the cylindrical protrusion, and the vertical frame 23 and the middle rail 25 are assembled by screwing through the screw hole inside the cylindrical protrusion of the engagement portion 73.

Assembly screws 78 are used to assemble the vertical frame 23 and the middle crosspiece 25 shown in FIG. 2. The assembly screws 78 have a screw head 75 and a threaded portion 77 formed over the entire length of the screw. The assembly screws 74 assemble the vertical frame 23 and the middle crosspiece 25 through a threaded hole inside the cylindrical protrusion of the fitting portion 73 of the resin block 70. As a result, the assembly hole of the vertical frame 23 is configured to have a larger diameter than the assembly screws 74, and a cylindrical resin protrusion is interposed in the gap between the assembly screws 78 and the assembly hole. This melts the cylindrical resin protrusion at high temperatures, providing room for the threaded portion 77 to move, so that the threaded portion 77 does not get caught in the assembly hole when the middle crosspiece 25 expands due to heat.

Assembly screws 74 are used to assemble the vertical frame 23 and middle crosspiece 25 shown in FIG. 5. As shown in FIG. 6, the assembly screws 74 have a flat portion 76 without threads between the screw head 75 and the threaded portion 77. The assembly screws 74 assemble the vertical frame 23 and 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 FIG. 5 has a cylindrical protrusion, the assembly screws 74 have flat portions 76, so that the flat portions 76 will not get caught in the assembly holes of the vertical frame 23 even if the resin block 70 does not have a cylindrical protrusion portion.

The metal bracket 80 is configured with a U-shaped cross section, and has a screw hole 81 that is attached to the vertical frame 23 together with the resin block 70, and a pair of guide parts 82 that fit and connect to the second reinforcing material 60. The bracket 80 fits into the fitting part of the resin block 70 to form a single unit. The guide parts 82 fit into the second reinforcing material 60. This allows the thermal expansion direction of the middle crosspiece 25 to be aligned with the guide parts 82, more reliably guiding it to the resin block 70, i.e., the thermal expansion allowance. Furthermore, the metal bracket 80 can remain 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 direction of the middle crosspiece 25. It can also bear the load of the second reinforcing material 60.

The fitting 100 may also have other reinforcing materials to prevent deformation. For example, as shown in FIG. 7, the outer 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.

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

The fitting 100 has a frame 10, an upper frame 21, a lower frame 22, a facing material 26, a pair of vertical frames 23, 24 each having a groove 1A, 1B on the other vertical frame 24, 23 side, a middle rail 25 whose both ends are assembled to the pair of vertical frames 23, 24, and a screen 20 attached to the frame 10, wherein the pair of grooves 1A, 1B each have a pair of side portions 2A, 2B into which the end of the middle rail 25 can be inserted, and a bottom portion 3A, 3B which is connected perpendicularly to the pair of side portions, and both ends of the middle rail 25 are inserted and positioned in the pair of grooves 1A, 1B, respectively, and at least one end of the middle rail 25 and one of the bottom portions 1A face each other with a thermal expansion allowance for the middle rail 25 between them, and a resin block 70 having a cylindrical protrusion is positioned in the thermal expansion allowance. This allows the resin block to melt when a fire breaks out, and by ensuring the thermal expansion of the middle bar, it is possible to reduce the force applied when the thermally expanded middle bar hits the vertical frame, suppressing deformation of the vertical frame.

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 the screw head 75 and the thread portion 77. As a result, the assembly hole of the vertical frame is made larger in diameter than the assembly screw, and the cylindrical resin protrusion is interposed in the gap between the assembly screw and the assembly hole, so that the thread does not get caught in the assembly hole when the middle rail is thermally stretched.

The other end of the middle crosspiece 25 is butted 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.

The other bottom surface portion 3B faces the other end of the middle crosspiece 25 on the front surface, and has a first reinforcing member 90 on the back surface that extends along the vertical frame 24 or vertical frame 13 and restricts deformation of the bottom surface portion 3B. This makes it difficult for the other bottom surface portion to deform, so that the middle crosspiece is more likely to receive force from the other bottom surface portion toward the thermal expansion allowance, and the middle crosspiece is more likely to thermally expand toward the thermal expansion allowance.

The middle rail 25 further includes a second reinforcing member 60 that extends along the middle rail 25 and restricts deformation of the middle rail 25. This improves the strength of the middle rail and makes it less prone to warping, making it easier for the middle rail to thermally expand toward the thermal expansion allowance.

The fitting 100 is placed between one end 25 of the middle rail and one of the bottom surfaces 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 middle rail to be guided along 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, and can continue to guide the thermal expansion of the middle rail. It can also support the load of the second reinforcing member 60.

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. That is, compared to the fitting 100 according to the first embodiment, the fitting 200 does not have a frame and is configured so as not to be opened or closed. In addition, the shape of the resin block 170 is different, and the fitting 200 does not have a bracket or a first reinforcing member.

As shown in FIG. 8, the fitting 200 according to the sixth embodiment of the present disclosure is a fixed window comprising a frame 110 and a window section 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.

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 constructed to a size that allows the middle rail 125 and the surface material 126 to be held within the frame, and is placed at the edge of an opening in the wall of a building. The frame body 110 can be constructed, 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 shapes.

The fitting 200 has a middle sash 125 and a surface 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 surface 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 improving the design of the building and for the purpose of letting in light.

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 a groove 101A, 101B on the side of the other vertical frame 114, 113. Both grooves 101A, 101B are configured with a pair of side portions 102A, 102B between which the middle rail 125 can be inserted, and bottom portions 103A, 103B that are connected perpendicularly to the pair of side portions 102A, 102B. One end of the middle rail 125 is inserted between the pair of side portions 102A and faces the bottom portion 103A, with a resin block 170 interposed between them. The other end of the middle rail 125 is inserted between the side portions 102B and faces the bottom portion 103B.

The resin block 170 has a fitting portion 173 inside a cylindrical protrusion that has a screw hole for assembling one end of the middle crosspiece 125 and the vertical frame 113, and is screwed 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 the like. At the same time, when a fire breaks out, the metal middle crosspiece 125 becomes hot and expands, causing thermal elongation. Therefore, the thermally expanded middle crosspiece 125 can enter the position of the resin block 170 that has become hot and softened. In other words, the resin block 170 interposed between one end of the middle crosspiece 125 and the bottom surface portion 103A becomes the thermal elongation allowance of the middle crosspiece 125. This ensures the thermal elongation allowance of the middle crosspiece.

The other end of the middle crosspiece 125 is inserted into the groove 101B and is positioned against the bottom surface 103B (not shown). As a result, when the middle crosspiece 125 thermally expands, it receives a 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.

Inside the middle rail 125, there is a second reinforcing member 160 extending along the middle rail 125. As shown in FIG. 10, the second reinforcing member 160 is formed in an L-shaped vertical cross section along the middle rail 125, and reinforces the middle rail 125 to restrict 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 to restrict deformation. For example, the horizontal cross section of the second reinforcing member 160 may be rectangular. The material constituting the second reinforcing member 160 is not particularly limited. The second reinforcing member 160 is made of stainless steel, for example. This improves the strength of the middle rail and makes it less likely to warp, and since deformation in directions other than the direction in which the middle rail extends is restricted, the middle rail is more likely to thermally expand toward the thermal expansion allowance.

As shown in FIG. 11, the resin block 170 is configured with a fitting portion 171 and a fitting portion 173 having a cylindrical protrusion that fits 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 for fitting. The fitting portion 173 has a screw hole inside the cylindrical protrusion, and the vertical frame 113 and the middle crosspiece 125 are assembled as shown in FIG. 12 by screwing through the screw hole of the fitting portion 173. The fitting portion 171 is fitted into the middle crosspiece 125 or the second reinforcing member 160.

The second embodiment of the fitting 200 of the present disclosure has been described. The fitting 200 provides the following effects.

The fixture 200 is a fixture having a frame body 110 consisting of an upper frame 111, a lower frame 112, a pair of vertical frames 113, 114 each having a groove portion 101A, 101B on the other vertical frame 114, 113 side, a middle sash 125 whose both ends are attached to the pair of vertical frames 113, 114, and a surface material 126 held by the frame body 110 and the middle sash 125. The pair of groove portions 101A, 101B are both It has a pair of side sections 102A, 102B that can be inserted between them, and bottom sections 103A, 103B that are connected perpendicular to the pair of side sections, 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 sections 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 becomes hot when a fire breaks out and melts, and by securing the thermal expansion allowance for the middle crosspiece, the force applied by the thermally expanded middle crosspiece when it hits the vertical frame can be reduced, and deformation of the vertical frame can be suppressed.

The first and second embodiments of the present disclosure have been described above, but 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.

In the modified example of the present disclosure, for example, the second embodiment may have a bracket or a first reinforcing member as in the first embodiment, and the second reinforcing member or the resin block may be formed in a U-shape instead of an L-shape. In addition, the resin block may be disposed on both ends of the center rail instead of only one end.

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 screen, 21...upper frame, 22...lower frame, 23...vertical frame, 24...joint frame, 25...middle crosspiece, 26...face material, 30...inner 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 part, 74...assembly screw, 75...screw head, 76...flat part, 77...thread part, 78...assembly screw, 80...bracket, 81...hole part, 82...guide part, 90...first reinforcement, 91...third reinforcement, 101A, 101B...groove part, 102A...side part, 103A...bottom part, 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 reinforcement, 161...upper end, 162...horizontal part, 170...resin block, 171...fitting part, 173...fitting part

Claims (8)

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. 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. 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;
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. 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. The fitting according to any one of claims 1 to 4, in which the other end of the middle bar is butted against the other bottom surface portion. The fitting according to claim 5, wherein the other bottom surface portion faces the other end of the middle rail on the front surface and has a first reinforcing member on the back surface that extends along the vertical frame or the vertical frame and restricts deformation of the bottom surface portion. The fitting 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. The fixture according to claim 7, wherein the resin block has a metal bracket that extends toward the second reinforcing material and fits into and connects to the second reinforcing material.

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