Sliding door, fixture and method for installing sliding door

Abstract

To provide a sliding door and a method for installing the sliding door that can reduce the amount of processing required at ends of vertical frames or ends of horizontal frames.SOLUTION: A sliding door 20 comprises: a frame body 200 formed by framing a pair of vertical members 23, 24 and a pair of horizontal members 21, 22; corner blocks 25, 26, 27, 28 provided between the vertical members 23, 24 and the horizontal members 21, 22 at corner portions of the frame body 200; overlapping portions 20a, 20b, 20c, 20d arranged so that parts of the vertical members 23, 24 and horizontal members 21, 22 overlap each other when viewed in a depth direction, with ends of the horizontal members 21, 22 arranged near glass groove bottoms 230a, 240a of the vertical members 23, 24; and fixing members 25a, 26a, 27a, 28a that fasten the vertical members 23, 24 and the horizontal members 21, 22 and are at least partially arranged inside the corner blocks 25, 26, 27, 28.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present disclosure relates to shoji screens, fittings, and methods for installing shoji screens. [Background technology]

[0002] Conventionally, a shoji screen has been known that includes a frame body formed by joining a pair of vertical frames (vertical members) and a pair of horizontal frames (horizontal members), and glass placed within the frame body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-60225 Summary of the Invention [Problem to be solved by the invention]

[0004] In the shoji screen described in Patent Document 1, when combining and installing vertical and horizontal frames, it was necessary to cut out the ends of the vertical and horizontal frames at the corners of the frame. There is a demand for reducing the amount of processing required at the ends of the vertical and horizontal frames.

[0005] The present disclosure aims to provide a shoji screen, fittings, and a shoji screen installation method that can reduce the amount of processing required on the ends of vertical or horizontal stiles. [Means for solving the problem]

[0006] The present disclosure relates to a shoji screen comprising: a frame body having a pair of vertical members and a pair of horizontal members and constructed by joining the frames together; a corner block provided between the vertical members and the horizontal members at the corner portion of the frame body; an overlapping portion where portions of the vertical members and the horizontal members overlap when viewed from the front, with the end of one of the horizontal members or the vertical members positioned near the bottom of the glass groove of the other of the horizontal members or the vertical members; and a fixing member that fastens the vertical members and the horizontal members and has at least a portion that is positioned inside the corner block. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a view of a vertical sliding window according to a first embodiment as seen from the inside of a room. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along line BB in FIG. [Figure 4] FIG. 2 is a perspective view of the frame of the vertical sliding window of the first embodiment as seen from the indoor side. [Figure 5] FIG. 5 is a perspective view showing a state in which a pair of vertical frames with corner blocks attached thereto have been removed from the upper and lower frames from the state shown in FIG. 4. [Figure 6] FIG. 10 is a diagram showing the state in which the attachment member is attached to the vertical frame. [Figure 7] This is an oblique view showing the state in which the corner block has been removed from the vertical frame. [Figure 8] FIG. 1 is a perspective view of the shoji screen of a vertical sliding window of the first embodiment, viewed from the inside of the room. [Figure 9] FIG. 1 is a perspective view of the shoji screen of a vertical sliding window of the first embodiment, viewed from the outside of the room. [Figure 10] 9 is a perspective view showing a state in which a pair of vertical stiles with corner blocks attached thereto have been removed from the upper and lower stiles from the state shown in FIG. 8. FIG. [Figure 11] FIG. 9 is a cross-sectional view taken along line CC in FIG. 8. [Figure 12] FIG. 9 is a cross-sectional view taken along the line DD in FIG. 8. [Figure 13]This is a perspective view showing the state in which the corner block has been removed from the vertical stile. [Figure 14] FIG. 14 is a diagram showing a first modified example of the first embodiment, in which the heat-foaming material is arranged at a different position compared to FIG. 13. [Figure 15] FIG. 14 is a diagram showing a second modified example of the first embodiment, in which the heat-foaming material is arranged at a different position compared to FIG. 13. [Figure 16] FIG. 10 is a view of a sliding window according to a second embodiment as seen from the inside of the room. [Figure 17] 17 is a cross-sectional view taken along line EE in FIG. 16. [Figure 18] FIG. 17 is a cross-sectional view taken along the line FF in FIG. 16. [Figure 19] This is an oblique view of the inner shoji screen of the second embodiment as seen from the inside of the room. [Figure 20] This is an oblique view of the inner shoji screen of the second embodiment as seen from the outside of the room. [Figure 21] 20 is a perspective view showing a state in which a pair of vertical stiles with corner blocks attached thereto have been removed from the upper and lower stiles from the state shown in FIG. 19. FIG. [Figure 22] FIG. 20 is a cross-sectional view taken along line GG in FIG. 19. [Figure 23] 20 is a cross-sectional view taken along line HH in FIG. 19. [Figure 24] FIG. 20 is a cross-sectional view taken along line II in FIG. 19. [Figure 25] This is an oblique view showing the state in which the corner block has been removed from the vertical frame of the inner shoji screen. [Figure 26] This is an oblique view showing the state in which the corner block has been removed from the vertical door frame of the inner shoji screen. [Figure 27] FIG. 27 is a diagram showing a first modified example of the second embodiment, in which the heated foaming material is arranged at a different position from the lower frame of FIG. 26. [Figure 28] This is an oblique view showing the state in which a door roller is attached to the bottom frame of a shoji screen. [Figure 29] FIG. 28 is a diagram showing a state in which a door roller is attached to the bottom frame of a shoji screen via a spacer member. [Figure 30]This is a diagram showing a second modified example of the second embodiment, and is a perspective view showing a state in which a door roller having two rows of wheels is attached to the bottom frame of an inner shoji screen. [Figure 31] FIG. 30 is a diagram showing a state in which two rollers are attached to the bottom frame of a shoji screen via a spacer member. [Figure 32] This is an oblique view of the inner shoji screen of the third embodiment as seen from the inside of the room. [Figure 33] This is an oblique view of the inner shoji screen of the third embodiment as seen from the outside of the room. [Figure 34] 33 is a perspective view showing a state in which a pair of vertical frames with corner blocks attached thereto have been removed from the upper and lower frames from the state shown in FIG. 32. FIG. [Figure 35] 33 is a cross-sectional view taken along line JJ in FIG. 32. [Figure 36] 33 is a cross-sectional view taken along the line KK in FIG. 32. [Figure 37] 33 is a cross-sectional view taken along line LL in FIG. 32. [Figure 38] This is an oblique view showing the state in which the corner block has been removed from the vertical frame of the inner shoji screen. [Figure 39] This is an oblique view showing the state in which the corner block has been removed from the vertical door frame of the inner shoji screen. [Figure 40] FIG. 10 is a view of the multi-window structure of the fourth embodiment as seen from the indoor side. [Figure 41] FIG. 10 is a perspective view of the multi-window structure of the fourth embodiment as seen from the indoor side. [Figure 42] FIG. 10 is a view of the continuous window of the fourth embodiment as seen from above. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In this specification, the "front view direction" refers to the direction along the indoor / outdoor direction of a fixture. The "front view direction" refers to the direction along the surface direction of the surface material (glass) of the fixture, and is a direction perpendicular to the front view direction. The "front view surface" refers to the surface of the fixture facing the outdoor side and the indoor side, respectively, and the "front view surface" refers to the surface of the fixture extending in the indoor / outdoor direction. In the drawings, the outdoor side of the fixture is referred to as "outdoor side X1" and the indoor side of the fixture is referred to as "indoor side X2". The horizontal direction when the fixture is viewed from the front is referred to as "left and right".

[0009] A first embodiment will be described. In the first embodiment, the fitting is configured as a vertical sliding window 1. As shown in Figs. 1 to 3, the vertical sliding window 1 (fitting) is placed in an opening 110 provided in a building skeleton 100. The vertical sliding window 1 comprises a frame body 10 and a shoji screen 20 that is arranged within the frame body 10 so that it can be opened and closed. The frame body 10 is fixed to the building skeleton 100. The shoji screen 20 can be opened by pushing the door edge side out to the outside X1 and rotating it around a rotation axis (not shown) provided on the hanging side.

[0010] 2 to 5, the frame body 10 is formed by framing an upper frame 11 (horizontal frame, cross member), a lower frame 12 (horizontal frame, cross member), and left and right vertical frames 13, 14 (hanging side vertical frame 13 and door end side vertical frame 14) (frames, vertical members) in a rectangular shape. The upper frame 11, lower frame 12, and left and right vertical frames 13, 14 are formed by extruding a metal material such as aluminum.

[0011] As shown in Figure 2, the upper frame 11 has a hollow section 111 extending in the forward direction, an outdoor-side upward protrusion 112 protruding upward from the outdoor-side X1 end of the upper surface of the hollow section 111, an indoor-side upward protrusion 113 protruding upward from the indoor-side X2 end of the upper surface of the hollow section 111, an outdoor-side downward protrusion 114 protruding downward from a portion of the underside of the hollow section 111 closer to the outdoor side X1, and an indoor-side downward extension 115 extending downward from a portion of the underside of the hollow section 111 closer to the indoor side X2. An airtight material 116 is attached to the outdoor-side X1 visible surface of the lower end of the indoor-side downward extension 115.

[0012] The lower frame 12 has a stepped portion 121 having a lower step 121a formed on the outside side X1 and an upper step 121c formed on the indoor side X2 via a step 121b on the lower step 121a, an outdoor upper protrusion 122 protruding upward from the end of the stepped portion 121 on the outside side X1, an outdoor downward protrusion 123 protruding downward from the end of the stepped portion 121 on the outside side X1, a hollow portion 124 formed at the top of the end of the stepped portion 121 on the indoor side X2, an indoor downward extension 125 extending downward from the end of the lower surface of the hollow portion 124 on the indoor side X2, and a protrusion 126 protruding upward from the end of the upper surface of the hollow portion 124 on the outside side X1. An airtight material 127 is attached to the visible surface of the protrusion 126 on the outside side X1.

[0013] As shown in Figure 3, the hanging side vertical frame 13 and the door end side vertical frame 14 each have a front-direction extending portion 131, 141, an outdoor protruding portion 132, 142 that protrudes outward in the left-right direction from the outdoor side X1 end of the front-direction extending portion 131, 141, an outdoor side inner extending portion 133, 143 that extends inward in the left-right direction from the outdoor side X1 end of the front-direction extending portion 131, 141, an indoor side outer protruding portion 134, 144 that protrudes outward in the left-right direction from the indoor side X2 end of the front-direction extending portion 131, 141, and a hollow portion 135, 145 formed inward in the left-right direction at the indoor side X2 end of the front-direction extending portion 131, 141.

[0014] The exterior-side interior extending portions 133, 143 have left-right extending plates 1331, 1431 extending inward in the left-right direction from the exterior X1 end of the projection extending portions 131, 141, bent portions 1332, 1432 bending from the interior left-right end of the left-right extending plates 1331, 1431 toward the interior X2, and protrusions 1333, 1433 protruding inward in the left-right direction from the interior X2 side end of the bent portions 1332, 1432. Airtight materials 233a, 243a attached to the exterior extending portions 233, 243 of the left and right vertical frames 23, 24 of the shoji screen 20 abut against the interior X2 surfaces of the protrusions 1333, 1433.

[0015] 3 to 5, attachment members 136, 146 are attached to the inner surfaces (inner peripheral surfaces) in the left-right direction of the projection-direction extending portions 131, 141 of the hanging-side vertical frame 13 and the door-end-side vertical frame 14. The attachment members 136, 146 are formed in an L-shape in cross section, and extend longitudinally along the longitudinal direction of the hanging-side vertical frame 13 and the door-end-side vertical frame 14.

[0016] As shown in Figures 4 and 5, when the upper frame 11, lower frame 12 and left and right vertical frames 13, 14 (the hanging side vertical frame 13 and the door end side vertical frame 14) are framed together, the attachment members 136, 146 have both longitudinal ends formed shorter than the both ends of the hanging side vertical frame 13 and the door end side vertical frame 14 so that the upper frame 11 or the lower frame 12 is positioned outside the longitudinal ends of the attachment members 136, 146.

[0017] As shown in Fig. 3, the attachment members 136, 146 are formed in the shape of a plate that is L-shaped in cross section, and are arranged across the inner left-right surfaces of the forward-extending portions 131, 141 and the outdoor X1 surface of the hollow portions 135, 145. Both the attachment members 136, 146 have the same shape except for being symmetrical, and are both attached to the inner left-right surfaces (inner peripheral surfaces) of the hanging-side vertical frame 13 and the door-end-side vertical frame 14. Note that the attachment members 136, 146 do not have to be L-shaped in cross section, and may be, for example, linear in cross section, or Z-shaped or U-shaped with a step in the middle of the straight line.

[0018] The attachment members 136, 146 have front-direction extension plates 1361, 1461 that extend in the front-direction along the inner left-right surfaces of the front-direction extension portions 131, 141, and front-direction extension plates 1362, 1462 that extend inward in the left-right direction from the ends of the front-direction extension plates 1361, 1461 on the indoor side X2.

[0019] The front-direction extending plates 1361, 1461 are fixed by screws 137, 147 to the inner left-right surfaces of the front-direction extending portions 131, 141. The outer left-right surfaces of the front-direction extending plates 1361, 1461 are formed with tip protrusions 1361a, 1461a formed at the end on the outside side X1 and protruding outward in the left-right direction, and a pair of protrusions 1361b, 1461b protruding outward in the left-right direction midway in the front direction.

[0020] The pair of protrusions 1361b, 1461b protrude slightly outward in the left-right direction from the outer left-right surfaces of the front-direction extending plates 1361, 1461, and are arranged at a predetermined interval in the front-direction.

[0021] The screws 137, 147 fasten and fix the forward extension plates 1361, 1461 of the attachment members 136, 146 and the forward extension portions 131, 141 of the hanging side vertical frame 13 and the door end side vertical frame 14, with the forward extension plates 1361, 1461 of the attachment members 136, 146 overlapping the inner left-right surfaces of the forward extension portions 131, 141 of the hanging side vertical frame 13 and the door end side vertical frame 14.

[0022] The screws 137, 147 pass between the pair of protrusions 1361b, 1461b and are moved from the inside to the outside in the left-right direction of the forward extension plates 1361, 1461 of the attachment members 136, 146, penetrating the forward extension plates 1361, 1461 of the attachment members 136, 146 and the forward extension portions 131, 141 of the hanging side vertical frame 13 and the door end side vertical frame 14, thereby fastening the forward extension plates 1361, 1461 of the attachment members 136, 146 to the forward extension portions 131, 141 of the hanging side vertical frame 13 and the door end side vertical frame 14. The pair of protrusions 1361b, 1461b abut against the projections 1131, 1141 of the hanging side vertical frame 13 and the door end side vertical frame 14, suppressing deformation of the attachment members 136, 146 when the tightening torque of the screws 137, 147 is applied.

[0023] Airtight materials 138, 148 (components) are attached to the exterior X1 surfaces of the inner left-right ends of the sight-direction extending plates 1362, 1462. As shown in FIG. 5, the airtight materials 138, 148 are provided throughout the entire longitudinal area of ​​the sight-direction extending plates 1362, 1462 of the attachment members 136, 146. As shown in FIG. 3, the airtight materials 138, 148 are arranged opposite the interior X2 surfaces of the outer left-right ends of the hollow portions 232, 242 of the left and right vertical frames 23, 24 of the shoji screen 20. As a result, the airtight materials 138, 148 come into contact with the interior X2 surfaces of the outer left-right ends of the hollow portions 232, 242 of the left and right vertical frames 23, 24 of the shoji screen 20 when the shoji screen 20 is in the closed position.

[0024] As shown in Figure 3, the surface of the viewing direction extension plates 1362, 1462 on the indoor side X2 midway in the left-right direction is formed with L-shaped engagement protrusions 1362a, 1462a (engagement portions) that protrude toward the indoor side X2, and protrusions 1362b, 1462b that protrude toward the indoor side X2 outside the L-shaped engagement protrusions 1362a, 1462a in the left-right direction.

[0025] The L-shaped engagement protrusions 1362a, 1462a are formed in an L-shape that opens outward in the left-right direction, and engage in a hooked state with the hook engagement portions 1351, 1451 formed on the exterior side X1 surfaces of the hollow portions 135, 145 of the hanging-side vertical frame 13 and the door-end-side vertical frame 14. As a result, the attachment members 136, 146 are attached to the hanging-side vertical frame 13 and the door-end-side vertical frame 14 by engaging the L-shaped engagement protrusions 1362a, 1462a with the hook engagement portions 1351, 1451 of the hanging-side vertical frame 13 and the door-end-side vertical frame 14.

[0026] The following describes the case where the attachment member 136 is attached to the hanging-side vertical frame 13. Note that the case where the attachment member 146 is attached to the door-end vertical frame 14 is the same as the case where the attachment member 136 is attached to the hanging-side vertical frame 13, so the description will be omitted.

[0027] When attaching the attachment member 136 to the hanging-side vertical frame 13, as shown in Fig. 6, the L-shaped engagement protrusion 1362a provided on the front-direction extending plate 1362 of the attachment member 136 is hooked and engaged with the hook engagement portion 1351 formed on the exterior-side X1 surface of the hollow portion 135 of the hanging-side vertical frame 13, and the attachment member 136 is positioned so as to straddle the inner left-right surface of the front-direction extending portion 131 and the exterior-side X1 surface of the hollow portion 135. In this state, by moving the screw 137 from the inner left-right side to the outer left side of the front-direction extending plate 1361 of the attachment member 136, the screw 137 is passed through the front-direction extending plate 1361 of the attachment member 136 and the front-direction extending portion 131 of the hanging-side vertical frame 13 to fix the attachment member 136 to the hanging-side vertical frame 13, as shown in Fig. 3.

[0028] Conventionally, when providing fins for attaching airtight material to vertical frames, fins extending longitudinally through the horizontal frames (upper and lower frames) are provided, and notches are cut into the longitudinal ends of either the vertical or horizontal frames (upper and lower frames) so that the fins do not overlap when the ends of the vertical and horizontal frames (upper and lower frames) are combined. Therefore, additional notches were required from the so-called raw state, which is formed by cutting in a direction perpendicular to the longitudinal direction of the vertical and horizontal frames (upper and lower frames).

[0029] In contrast to this, in this embodiment, the attachment members 136, 146 are attached to the hanging side vertical frame 13 and the door end side vertical frame 14, so by providing attachment members 136, 146 with adjusted lengths without performing additional notch processing on the longitudinal ends of the hanging side vertical frame 13 and the door end side vertical frame 14, it is possible to provide members for attaching airtight materials 138, 148 to the hanging side vertical frame 13 and the door end side vertical frame 14.

[0030] In this embodiment, the attachment members 136, 146 are attached to the hanging-side vertical frame 13 and the door-end-side vertical frame 14, but this is not limiting. The attachment members may also be attached to the upper frame 11 and the lower frame 12. When the attachment members are attached to the upper frame 11 and the lower frame 12, the longitudinal length of the attachment members is formed to be shorter than the longitudinal lengths of the upper frame 11 and the lower frame 12. In this way, by providing attachment members with adjusted lengths without performing additional notch processing on the longitudinal ends of the upper frame 11 and the lower frame 12, it is possible to provide members for attaching airtight material to the upper frame 11 and the lower frame 12.

[0031] Furthermore, in the present embodiment, the airtight materials 138, 148 have been described as an example of a component attached to the attachment members 136, 146, but this is not limiting. The component may be any component that extends over the entire longitudinal length of the attachment members 136, 146, such as a glazing channel, bead material, sealant, waterproof material, or heat-foaming material. Furthermore, the component attached to the attachment members 136, 146 does not have to extend over the entire longitudinal length of the attachment members 136, 146, and may be, for example, a metal component such as a handle clamping receiver or a sub-lock clamping receiver.

[0032] Furthermore, in this embodiment, the attachment members 136, 146 are attached to the vertical frames 13, 14 of the frame body 10, but this is not limiting. The attachment members may also be attached to the inner periphery of either the vertical frame (vertical member) or the horizontal frame (horizontal member) of the frame body (frame body) of the shoji screen. Furthermore, in this embodiment, an example in which the attachment members are applied to a vertical sliding window has been described, but this is not limiting, and the attachment members can also be applied to sliding windows, horizontal sliding windows, stile doors (doors in which a panel is fitted into a rectangular frame body), etc.

[0033] Furthermore, in the past, when constructing a stepped window in which multiple window sections are arranged in a vertical direction, if a blind is placed between adjacent window sections, the fins of the vertical frame would get in the way, so notches had to be cut out of the fins. In contrast, by attaching the attachment member of this embodiment to the vertical frame, notches need not be cut out of the fins of the vertical frame, and a stepped window can be provided without additional notches in the vertical frame.

[0034] As shown in Figure 4, the four corner portions of the frame body 10 are provided with an upper corner block 15 (corner block) on the hanging side frame side, a lower corner block 16 (corner block) on the hanging side frame side, an upper corner block 17 (corner block) on the door edge side frame side, and a lower corner block 18 (corner block) on the door edge side frame side.

[0035] 4 and 5, the hanging-side frame-side upper corner block 15 is provided between the hanging-side vertical frame 13 and the upper frame 11 at the corner where the hanging-side vertical frame 13 and the upper frame 11 are combined, and connects the hanging-side vertical frame 13 and the upper frame 11. The lower surface of the hanging-side frame-side upper corner block 15 is positioned opposite the edge of the upper longitudinal end of the hanging-side vertical frame 13, and the side surface is positioned opposite the edge of the end of the upper frame 11 on the hanging-side vertical frame 13 side in the longitudinal direction.

[0036] The hanging-side frame-side lower corner block 16 is provided between the hanging-side vertical frame 13 and the lower frame 12 at the corner where the hanging-side vertical frame 13 and the lower frame 12 are combined, and connects the hanging-side vertical frame 13 and the lower frame 12. The upper surface of the hanging-side frame-side lower corner block 16 is positioned opposite the edge of the lower longitudinal end of the hanging-side vertical frame 13, and the side surface is positioned opposite the edge of the end of the lower frame 12 on the hanging-side vertical frame 13 side in the longitudinal direction.

[0037] The leading edge frame upper corner block 17 is provided between the leading edge vertical frame 14 and the upper frame 11 at the corner where the leading edge vertical frame 14 and the upper frame 11 are combined, and connects the leading edge vertical frame 14 and the upper frame 11. The bottom surface of the leading edge frame upper corner block 17 is positioned opposite the edge of the longitudinal upper end of the leading edge vertical frame 14, and the side surface is positioned opposite the edge of the longitudinal end of the upper frame 11 on the leading edge vertical frame 14 side.

[0038] The leading edge frame lower corner block 18 is provided between the leading edge vertical frame 14 and the bottom frame 12 at the corner where the leading edge vertical frame 14 and the bottom frame 12 are combined, and connects the leading edge vertical frame 14 and the bottom frame 12. The leading edge frame lower corner block 18 is arranged with its top surface facing the edge of the lower longitudinal end of the leading edge vertical frame 14, and its side surface facing the edge of the longitudinal end of the bottom frame 12 on the leading edge vertical frame 14 side.

[0039] At the four corners of the frame body 10, the upper frame 11, lower frame 12 and left and right vertical frames 13, 14 (the vertical frame 13 on the hanging side and the vertical frame 14 on the door end side), as shown in Figures 5 and 7, are all formed by simply cutting the longitudinal ends in a direction perpendicular to the longitudinal direction, with no additional cutout processing, and are formed in a so-called raw cut state.

[0040] As shown in Figure 1, when the upper frame 11 and the hanging-side vertical frame 13 are combined by placing the hanging-side upper corner block 15 between them, the longitudinal end of the upper frame 11 on the hanging-side vertical frame 13 side is inserted into the hanging-side vertical frame 13, forming an overlapping portion 10a where parts of the hanging-side vertical frame 13 and the upper frame 11 overlap when viewed from the front. Also, when the upper frame 11 and the leading-side vertical frame 14 are combined by placing the leading-side upper corner block 17 between them, the longitudinal end of the upper frame 11 on the leading-side vertical frame 14 side is inserted into the leading-side vertical frame 14, forming an overlapping portion 10b where parts of the leading-side vertical frame 14 and the upper frame 11 overlap when viewed from the front. The longitudinal end of the bottom frame 12 on the side of the hanging-side vertical frame 13 does not overlap with the hanging-side vertical frame 13. The longitudinal end of the bottom frame 12 on the side of the door-end vertical frame 14 does not overlap with the door-end vertical frame 14.

[0041] The upper corner block 15 and the lower corner block 16 on the hanging side frame are symmetrical in shape to the upper corner block 17 and the lower corner block 18 on the door edge side frame, but have the same basic structure. Therefore, the following explanation will mainly focus on the upper corner block 15 and the lower corner block 16 on the hanging side frame.

[0042] The hanging-side frame-side upper corner block 15 will now be described. As shown in Fig. 1, the hanging-side frame-side upper corner block 15 is positioned closer to the outer periphery of the frame body 10 than the overlapping portion 10a where the hanging-side vertical frame 13 and the upper frame 11 partially overlap when viewed from the front. As shown in Fig. 7, the hanging-side frame-side upper corner block 15 has a design portion 151 exposed to the outside and a fixing portion 152 that fixes the hanging-side vertical frame 13 and the upper frame 11 together.

[0043] The design part 151 has a design part side substrate part 1511 formed in the shape of a plate having thickness in the left-right direction, width in the up-down direction, and extending in the forward direction, an L-shaped protrusion part 1512 protruding outward in the left-right direction from the end of the design part side substrate part 1511 on the outside side X1, and an L-shaped protrusion part 1513 protruding outward in the left-right direction from the end of the design part side substrate part 1511 on the inside side X2.

[0044] As shown in Fig. 5, the design-side substrate portion 1511 is disposed opposite the small end surface of the end portion of the upper frame 11 on the hanging-side vertical frame 13 side in the left-right direction. As shown in Fig. 7, a sealant 1511a is attached to the inner left-right surface of the design-side substrate portion 1511. As shown in Fig. 5, the outside X1 surface of the L-shaped protrusion 1512 disposed on the outside X1 side is exposed to the outside of the outside X1 and constitutes the design surface of the outside X1 side of the hanging-side frame upper corner block 15. The indoor side X2 surface of the L-shaped protrusion 1513 disposed on the inside X2 side is exposed to the outside of the inside X2 and constitutes the design surface of the inside X2 side of the hanging-side frame upper corner block 15.

[0045] As shown in Figure 7, the fixing portion 152 has a vertical extension plate 1521, a plate-shaped protrusion 1522 protruding outward in the left-right direction from the end of the vertical extension plate 1521 on the outside side X1, a plate-shaped protrusion 1523 protruding outward in the left-right direction from the end of the vertical extension plate 1521 on the inside side X2, a lower end protrusion plate 1524 (horizontal protrusion plate) protruding outward in the left-right direction from the lower end of the vertical extension plate 1521, and an upper end protrusion 1525 (protrusion) protruding inward in the left-right direction from the upper end of the vertical extension plate 1521.

[0046] The vertically extending plate 1521 is disposed so as to extend vertically (up and down) along the outer surfaces in the left and right directions of the design portion side substrate portion 1511. The vertically extending plate 1521 extends vertically along the edge surface of the end face of the upper frame 11 in the longitudinal direction.

[0047] As shown in Figure 5, the vertical extension plate 1521 is fixed to the screw fastening portion 11a on the end surface of the end portion of the upper frame 11 on the hanging side vertical frame 13 side in the longitudinal direction, with the vertical extension plate 1521 and the design side base plate portion 1511 fastened together by a pair of screws 15a arranged apart in the forward direction.

[0048] 7, a pair of slit openings 1521a extending in the up-down direction are formed in the vertically extending plate 1521. When the lower end protruding plate 1524 of the fixing part 152 is fixed to the end face of the upper end of the hanging-side vertical frame 13 in the longitudinal direction with the screws 15b, the pair of slit openings 1521a extend up and down so as not to come into contact with the screws 15b that are moved downward.

[0049] The lower end protruding plate 1524 is arranged to extend laterally (horizontally) along the edge of the upper end of the lengthwise direction of the hanging-side vertical frame 13. The lower end protruding plate 1524 is formed to protrude laterally from the end of the vertically extending plate 1521 on the hanging-side vertical frame 13 side to the opposite side from the upper frame 11, and is arranged along the edge of the end face of the lengthwise end of the hanging-side vertical frame 13.

[0050] A sealant 1524a is attached to the underside of the lower end protruding plate 1524. The lower end protruding plate 1524 is fixed to the screw fastening portion 13a on the end surface of the upper end of the hanging-side vertical frame 13 in the longitudinal direction by a pair of screws 15b arranged apart in the projection direction.

[0051] As shown in Figure 4, when the upper corner block 15 on the hanging side frame side is attached between the hanging side vertical frame 13 and the upper frame 11, the upper end protrusion 1525 protrudes from the upper end of the vertical extension plate 1521 (the end opposite the lower end protrusion plate 1524) toward the upper frame 11 along the outer upper surface (visible surface) of the hanging side vertical frame 13.

[0052] When fixing the hanging-side frame-side upper corner block 15 to the hanging-side vertical frame 13, the pair of screws 15b that secure the lower-end protruding plate 1524 are tightened, thereby pulling the upper-end protruding portion 1525 of the hanging-side frame-side upper corner block 15 toward the hanging-side vertical frame 13. As a result, when fixing with the screws 15b, the upper-end protruding portion 1525 pulls the upper surface of the upper frame 11 toward the hanging-side vertical frame 13 from the upper surface side of the upper frame 11, sandwiching and fixing the longitudinal end of the upper frame 11 between the upper end of the hanging-side vertical frame 13 and the upper-end protruding portion 1525. Therefore, the hanging-side frame-side upper corner block 15 can firmly fix the upper frame 11 and the hanging-side vertical frame 13.

[0053] The hanging-side frame-side lower corner block 16 will now be described. As shown in Figure 7, the hanging-side frame-side lower corner block 16 has a design portion 161 exposed to the outside and a fixing portion 162 fixed to the hanging-side vertical frame 13 and the lower frame 12. The design portion 161 has a design-side base plate 1611 formed in a plate shape with a thickness in the left-right direction and a width in the up-down direction extending in the projection direction, an L-shaped protrusion 1612 protruding outward in the left-right direction from the end of the design-side base plate 1611 on the outside X1 side, an L-shaped protrusion 1613 protruding outward in the left-right direction from the end of the design-side base plate 1611 on the inside X2 side, and an inward protrusion 1614 protruding inward in the left-right direction from the end of the design-side base plate 1611 on the outside X1 side.

[0054] The configuration of the design portion 161 and fixing portion 162 of the hanging-side frame lower corner block 16 differs from that of the hanging-side frame upper corner block 15 in that the design portion 161 of the hanging-side frame lower corner block 16 has an inward protrusion 1614, the vertical orientation, the shape of each part, and the fixing position of the screws, but the basic configuration and function are the same. Therefore, in the explanation of the hanging-side frame lower corner block 16, the symbols corresponding to those of the hanging-side frame upper corner block 15 will be used, and the "upper frame," "upper portion," "upper surface," "upper end," "lower end," and "lower" described in the hanging-side frame upper corner block 15 will be read as "lower frame," "lower portion," "lower surface," "lower end," "upper end," and "upper," and the explanation will be omitted.

[0055] In the above-described frame body 10, the corner blocks 15, 16 have design portions 151, 161 exposed to the outside and fixing portions 152, 162 that fix the vertical frame 13 and the horizontal frame (upper frame 11, lower frame 12). Therefore, corner blocks 15, 16 having design portions 151, 161 and fixing portions 152, 162 are provided at the corner portions of the frame body 10, thereby ensuring both the design of the exterior and the strength of the corner portions of the frame body 10. Furthermore, by configuring the corner portions of the frame body 10 with corner blocks 15, 16 having design portions 151, 161 and fixing portions 152, 162, the number of parts constituting the corner portions can be reduced.

[0056] Furthermore, the frame body 10 has overlapping portions 10a and 10b at the corners where a part of the upper frame 11 overlaps a part of the vertical frame (the hanging-side vertical frame 13 and the door-end-side vertical frame 14). This improves the strength of the corners of the frame body 10.

[0057] As shown in Figures 1 to 3, the shoji screen 20 includes a frame body 200 formed by assembling an upper frame 21 (horizontal member), a lower frame 22 (horizontal member), and left and right vertical frames 23, 24 (vertical members) into a rectangular shape, and glass 201 fitted and fixed into the frame body 200. As shown in Figure 3, when viewed from the room side X2, the left and right vertical frames 23, 24 are made up of a hanging-side vertical frame 23 located on the left side and a door-end-side vertical frame 24 located on the right side. The upper frame 21, lower frame 22, and left and right vertical frames 23, 24 are formed by extruding a metal material such as aluminum.

[0058] 2, the upper frame 21 has an upper frame body 211 and a flange 217 attached to the indoor side X2 of the upper frame body 211 and extending downward on the indoor side X2 of the upper frame body 211. The upper frame body 211 has a hollow portion 212, an outdoor downward extension portion 213 extending downward from the outdoor side X1 end of the lower surface of the hollow portion 212, an outdoor upward extension portion 214 extending upward from the outdoor side X1 end of the upper surface of the hollow portion 212, an indoor upward extension portion 215 protruding upward from the indoor side X2 end of the upper surface of the hollow portion 212, and a fitting portion 216 formed at the indoor side X2 end of the lower surface of the hollow portion 212.

[0059] An airtight material 214a is attached to the indoor side X2 surface of the upper end of the outdoor side upward extension 214. The tip of the airtight material 214a abuts the outdoor side X1 surface of the outdoor side downward protrusion 114 provided on the underside of the hollow portion 111 of the upper frame 11.

[0060] A flange 217 is fitted and attached to the fitting portion 216, and the flange 217 presses against the peripheral edge of the glass 201. As a result, the edge of the upper end of the glass 201 is clamped between the flange 217 and the outdoor-side downward extension 213 of the upper frame body 211. An airtight material 116 attached to the outdoor-side X1 facing surface of the lower end of the indoor-side downward extension 115 of the upper frame 11 abuts against the indoor-side X2 facing surface of the indoor-side upward protrusion 215.

[0061] The lower frame 22 has a hollow portion 221, an outdoor upward extension portion 222 extending upward from the outdoor side X1 end of the upper surface of the hollow portion 221, an outdoor downward extension portion 223 extending downward from the outdoor side X1 end of the lower surface of the hollow portion 221, an indoor downward protrusion portion 224 extending downward from the indoor side X2 end of the lower surface of the hollow portion 221, and an indoor upward extension portion 225 extending upward from the indoor side X2 end of the upper surface of the hollow portion 221.

[0062] The lower end of the glass 201 is positioned between the hollow portion 221, the outdoor upper extension 222, and the indoor upper extension 225, and the edge of the lower end of the glass 201 is clamped between the outdoor upper extension 222 and the indoor upper extension 225. An airtight material 127 attached to the outdoor side X1 facing surface of the protrusion 126 of the lower frame 12 abuts against the indoor side X2 surface of the indoor side downward protrusion 224.

[0063] 3, the left and right vertical frames 23, 24 each have a vertical frame main body 231, 241 and a push edge 237, 247 attached to the indoor side X2 of the vertical frame main body 231, 241 and extending inward in the left-right direction of the vertical frame main body 231, 241. The vertical frame main body 231, 241 has a hollow portion 232, 242, an outer extension portion 233, 243 extending outward in the left-right direction from the end of the outdoor side X1 of the outer surface of the hollow portion 232, 242, an inner extension portion 234, 244 extending inward in the left-right direction from the end of the outdoor side X1 of the inner surface of the hollow portion 232, and a fitting portion 235, 245 formed on the end side of the indoor side X2 of the inner surface of the hollow portion 232 in the left-right direction.

[0064] Pressing edges 237, 247 are fitted into the fitting portions 235, 245 and attached, and the pressing edges 237, 247 press against the peripheral edge of the glass 201. As a result, the edges of both left and right ends of the glass 201 are clamped between the inward extending portions 234, 244 of the stile main bodies 231, 241 and the pressing edges 237, 247. Airtight materials 233a, 243a are attached to the indoor-side X2 surfaces of the outer left and right ends of the outer extending portions 233, 243. The tips of the airtight materials 233a, 243a abut against the protrusions 1333, 1433 of the outdoor-indoor extending portions 133, 143 of the hanging-side vertical frame 13 and the door-end-side vertical frame 14.

[0065] The airtight materials 138, 148 attached to the outdoor X1 surfaces of the inner left-right ends of the sight-direction extension plates 1362, 1462 of the attachment members 136, 146 attached to the hanging-side vertical frame 13 and the door-end side vertical frame 14 abut against the indoor X2 surfaces of the outer left-right ends of the hollow portions 232, 242.

[0066] 1 and 3, an operating handle 24a is attached to the middle position in the vertical direction on the inside side X2 of the door-front vertical frame 24. The shoji screen 20 can be opened by grasping and rotating the operating handle 24a from the inside side X2, pushing the door-front vertical frame 24 to the outside side X1, and rotating it around the rotation axis provided on the hanging side.

[0067] As shown in Figures 1 to 3, the glass 201 is formed into a rectangular shape and is fitted and fixed in the frame 200. As shown in Figures 2 and 3, the glass 201 fitted in the frame 200 of the shoji screen 20 is a double-glazed glass having a glass sheet 201a on the outside X1, a glass sheet 201b on the inside X2, and a spacer 201c sandwiched between the two glass sheets 201a and 201b at the ends of the two glass sheets 201a and 201b, and has excellent heat insulation properties.

[0068] In addition, as shown in Figures 8 to 10, the four corner portions of the frame body 200 are provided with an upper corner block 25 (corner block) on the frame side of the hanging point, a lower corner block 26 (corner block) on the frame side of the hanging point, an upper corner block 27 (corner block) on the frame side of the door edge, and a lower corner block 28 (corner block) on the frame side of the door edge.

[0069] As shown in Figures 8 to 10, the hanging-side frame-side upper corner block 25 is provided between the hanging-side vertical frame 23 and the upper frame 21 at the corner where the hanging-side vertical frame 23 and the upper frame 21 are combined, and connects the hanging-side vertical frame 23 and the upper frame 21. The hanging-side frame-side upper corner block 25 is arranged such that the lower insertion portion 253 (see Figures 11 and 13) is inserted into the end of the hanging-side vertical frame 23 from the end face of the upper end of the hanging-side vertical frame 23 in the longitudinal direction, and the side surface is arranged facing the end face of the end of the upper frame 21 on the hanging-side vertical frame 23 side in the longitudinal direction.

[0070] The hanging-side stile-side lower corner block 26 is provided between the hanging-side vertical stile 23 and the lower stile 22 at the corner where the hanging-side vertical stile 23 and the lower stile 22 are combined, and connects the hanging-side vertical stile 23 and the lower stile 22. The hanging-side stile-side lower corner block 26 is positioned such that the upper insertion portion 263 (see Figures 12 and 13) is inserted into the end of the hanging-side vertical stile 23 from the end face of the lower end of the hanging-side vertical stile 23 in the longitudinal direction, and the side surface is positioned facing the end face of the end of the lower stile 22 on the hanging-side vertical stile 23 side in the longitudinal direction.

[0071] The leading-side stile-side upper corner block 27 is provided between the leading-side stile 24 and the upper stile 21 at the corner where the leading-side stile 24 and the upper stile 21 are combined, and connects the leading-side stile 24 and the upper stile 21. The leading-side stile-side upper corner block 27 is arranged so that its lower insertion portion 273 (see Figure 11) is inserted into the end of the leading-side stile 24 from the edge of the upper end of the leading-side stile 24 in the longitudinal direction, and its side surface is arranged facing the edge of the end of the upper stile 21 on the leading-side stile 24 side in the longitudinal direction.

[0072] The lower corner block 28 on the leading edge stile side is provided between the leading edge stile 24 and the bottom stile 22 at the corner where the leading edge stile 24 and the bottom stile 22 are combined, and connects the leading edge stile 24 and the bottom stile 22. The upper insertion portion 283 (see Figure 12) of the lower corner block 28 on the leading edge stile side is inserted into the end of the leading edge stile 24 from the edge face of the lower end of the leading edge stile 24 in the longitudinal direction, and the side surface is positioned facing the edge face of the end of the bottom stile 22 on the leading edge stile 24 side in the longitudinal direction.

[0073] At the four corners of the frame 200, the upper frame 21, the lower frame 22 and the left and right vertical frames 23, 24 (the vertical frame 23 on the hanging side and the vertical frame 24 on the door end side) are all formed by simply cutting the longitudinal ends in a direction perpendicular to the longitudinal direction, as shown in Figures 10 and 13, and no additional cutouts are made, so they are formed in a so-called raw cut state.

[0074] 9 and 11, when the hanging-side frame-side upper corner block 25 is installed between the upper frame 21 and the hanging-side vertical frame 23, as shown in Fig. 11, the end 210a of the upper frame 21 on the hanging-side vertical frame 23 side in the longitudinal direction is swallowed into the glass arrangement groove 230 (swallowing portion, glass groove) in which the glass 201 of the hanging-side vertical frame 23 is swallowed and arranged, and is arranged near the bottom 230a of the glass arrangement groove 230 of the hanging-side vertical frame 23. The end 210a of the upper frame 21 on the hanging-side vertical frame 23 side in the longitudinal direction is arranged in contact with the visible surface of the bottom 230a of the glass arrangement groove 230 of the hanging-side vertical frame 23. 9 and 11, an overlapping portion 20a is formed where parts of the upper frame 21 and the hanging-side vertical frame 23 overlap when viewed from the front side. Furthermore, the left-right dimension of the overlapping portion 20a should be greater than the distance from the end 210a of the upper frame 21 to the bottom 230a of the glass placement groove 230 of the hanging-side vertical frame 23.

[0075] In this embodiment, the end 210a of the upper frame 21 on the side of the hanging base vertical frame 23 in the longitudinal direction is arranged in the vicinity of the bottom 230a of the glass arrangement groove 230 of the hanging base vertical frame 23. This not only means that the end 210a of the upper frame 21 on the side of the hanging base vertical frame 23 in the longitudinal direction is arranged in contact with the visible surface of the bottom 230a of the glass arrangement groove 230 of the hanging base vertical frame 23, but also means that the end 210a of the upper frame 21 on the side of the hanging base vertical frame 23 in the longitudinal direction is arranged in contact with the visible surface of the bottom 230a of the glass arrangement groove 230 of the hanging base vertical frame 23. This also means that the end 210a of the upper frame 21 on the hanging-side vertical frame 23 side in the longitudinal direction is positioned near the bottom 230a of the glass placement groove 230 of the hanging-side vertical frame 23, even when the end 210a on the hanging-side vertical frame 23 side in the longitudinal direction of the upper frame 21 is separated, for example, by a distance of 0 to 10 mm from the bottom 230a of the glass placement groove 230 of the hanging-side vertical frame 23. Note that the case where the end 210a is separated by a distance of 0 mm refers to the case where the end 210a on the hanging-side vertical frame 23 side in the longitudinal direction of the upper frame 21 abuts against the bottom 230a of the glass placement groove 230 of the hanging-side vertical frame 23. Furthermore, in the following explanations of this specification, the term "near" in the configuration where "the longitudinal end of the horizontal frame (upper frame or lower frame) on the vertical frame side is positioned near the bottom of the glass placement groove in the vertical frame" has the same meaning.

[0076] Also, for example, a step may be provided on the side or bottom 230a of the glass placement groove 230, with the end 210a of the upper frame 21 abutting against the step. Also, a component such as a block may be placed on the bottom 230a of the glass placement groove 230, with the end 210a of the upper frame 21 abutting against the component.

[0077] 9 and 11, when the door-front-side stile-side upper corner block 27 is provided between the upper frame 21 and the door-front-side stile 24, as shown in Fig. 11, the end 210b of the upper frame 21 on the door-front-side stile 24 side in the longitudinal direction is swallowed into the glass arrangement groove 240 (swallowing portion, glass groove) in which the glass 201 in the door-front-side stile 24 is swallowed and arranged, and is arranged near the bottom 240a of the glass arrangement groove 240 of the door-front-side stile 24. The end 210b of the upper frame 21 on the door-front-side stile 24 side in the longitudinal direction is arranged in contact with the visible surface of the bottom 240a of the glass arrangement groove 240 of the door-front-side stile 24. In this state, as shown in Figures 9 and 11, an overlapping portion 20b is formed where parts of the upper frame 21 and the door-end vertical frame 24 overlap when viewed from the front side.

[0078] 9 and 12, when the hanging-side frame-side lower corner block 26 is provided between the lower frame 22 and the hanging-side vertical frame 23, as shown in Fig. 12, the end 220a of the lower frame 22 on the hanging-side vertical frame 23 side in the longitudinal direction is swallowed into the glass placement groove 230 (swallowing portion, glass groove) in which the glass 201 of the hanging-side vertical frame 23 is swallowed and placed, and is placed in contact with the visible surface of the bottom 230a of the glass placement groove 230 of the hanging-side vertical frame 23 near the bottom 230a of the glass placement groove 230 of the hanging-side vertical frame 23. In this state, as shown in Figs. 9 and 12, an overlapping portion 20c is formed where parts of the lower frame 22 and the hanging-side vertical frame 23 overlap when viewed in the visible direction.

[0079] 9 and 12, when the door-front-side stile-side lower corner block 28 is provided between the stile 22 and the door-front-side stile 24, as shown in FIG. 12, the longitudinal end 220b of the stile 22 is swallowed into the glass arrangement groove 240 (swallowing portion, glass groove) into which the glass 201 of the door-front-side stile 24 is swallowed and arranged, and is arranged near the bottom 240a of the glass arrangement groove 240 of the door-front-side stile 24. The longitudinal end 220b of the stile 22 is arranged in contact with the visible surface of the bottom 240a of the glass arrangement groove 240 of the door-front-side stile 24. In this state, as shown in FIG. 9 and 12, an overlapping portion 20d is formed in which parts of the stile 22 and the door-front-side stile 24 overlap when viewed in the visible direction.

[0080] The hanging-side stile-side upper corner block 25 and the hanging-side stile-side lower corner block 26 have the same basic structure as the door-end-side stile-side upper corner block 27 and the door-end-side stile-side lower corner block 28. Therefore, the following explanation will mainly focus on the hanging-side stile-side upper corner block 25 and the hanging-side stile-side lower corner block 26. The explanation of the door-end-side stile-side upper corner block 27 and the door-end-side stile-side lower corner block 28 can be made by referring to the explanation of the hanging-side stile-side upper corner block 25 and the hanging-side stile-side lower corner block 26.

[0081] 9, the upper corner block 25 on the hanging-side frame side is positioned closer to the outer periphery of the frame body 200 than the overlapping portion 20a where the upper frame 21 and the hanging-side vertical frame 23 partially overlap when viewed from the front. The lower corner block 26 on the hanging-side frame side is positioned closer to the outer periphery of the frame body 200 than the overlapping portion 20c where the lower frame 22 and the hanging-side vertical frame 23 partially overlap when viewed from the front.

[0082] 13, the hanging-side stile-side upper corner block 25 and the hanging-side stile-side lower corner block 26 are each mainly composed of two members: a resin block main body 251, 261 (resin portion) made of a resin material, and a metal reinforcing portion 255, 265 (metal portion) made of a metal material. The block main body 251, 261 is composed of an integrated part that integrates an exterior configuration portion 252, 262 that is arranged exposed to the outside, and an insertion portion 253, 263 that is arranged by being inserted into the upper end or lower end of the hanging-side vertical stile 23 in the longitudinal direction.

[0083] The exterior components 252, 262 have end components 2521, 2621 and facing panel portions 2522, 2622 that are arranged on the outdoor side X1 of the end components 2521, 2621 and extend in the facing direction.

[0084] The insertion portions 253, 263 are inserted into the end of the hanging-side vertical stile 23 from the small end face of the upper or lower end in the longitudinal direction of the hanging-side vertical stile 23. The insertion portions 253, 263 have a pair of protruding plates 2531, 2631 that protrude toward the hanging-side vertical stile 23 from the face of the end portion constituent portions 2521, 2621 on the hanging-side vertical stile 23 side, and horizontal plate portions 2532, 2632 that connect the ends of the pair of protruding plates 2531, 2631 on the hanging-side vertical stile 23 side. In the block main body portions 251, 261, internal spaces S1, S2 are formed inside the end portion constituent portions 2521, 2621 and the pair of protruding plates 2531, 2631 and horizontal plate portions 2532, 2632 of the insertion portions 253, 263. Reinforcing portions 255 and 265 are disposed in the internal spaces S1 and S2 of the block main bodies 251 and 261.

[0085] The reinforcing portions 255, 265 are formed in the shape of L-shaped plates that open outward on the diagonal of the shoji screen 20 at each corner of the shoji screen 20. The reinforcing portions 255, 265 are made of a metal material. The reinforcing portions 255, 265 reinforce the corners of the frame body 200.

[0086] The reinforcing portions 255, 265 have fixed-side vertical plate portions 2551, 2651 that have thickness in the left-right direction and width in the up-down direction and extend in the front direction, and fitting-side horizontal plate portions 2552, 2652 that are plate-shaped and extend horizontally outward in the left-right direction from the end portions of the fixed-side vertical plate portions 2551, 2651 on the hanging-side vertical frame 23 side. The fitting-side horizontal plate portions 2552, 2652 have opening fitting portions 2552a, 2652a formed therein.

[0087] The opening fitting portions 2552a, 2652a of the fitting-side horizontal plate portions 2552, 2652 of the reinforcing portions 255, 265 are fitted and fixed to the fitting claws 2532a, 2632a of the horizontal plate portions 2532, 2632 of the insertion portions 253, 263 of the block main bodies 251, 261 in a state in which the reinforcing portions 255, 265 are arranged inside the internal spaces S1, S2 on the inside of the block main bodies 251, 261. As shown in FIGS. 10 to 13, the reinforcing portions 255, 265 are fixed in a state in which they are arranged inside the block main bodies 251, 261 and fitted and fixed to the block main bodies 251, 261 by fastening them with screws 25a, 26a (fixing members, fastening members) to screw fastening portions 21a, 22a formed on the end faces of the longitudinal ends of the upper frame 21 or the lower frame 22.

[0088] Next, we will explain the procedure for assembling the hanging side vertical frame 23 and the upper frame 21 with the hanging side frame upper corner block 25 interposed therebetween, and the procedure for assembling the hanging side vertical frame 23 and the lower frame 22 with the hanging side frame lower corner block 26 interposed therebetween.

[0089] First, as shown in Figure 13, the reinforcing parts 255, 265 are inserted into the internal spaces S1, S2 of the block main bodies 251, 261, and the reinforcing parts 255, 265 are fitted and fixed to the horizontal plate parts 2532, 2632 of the insertion parts 253, 263 of the block main bodies 251, 261. After that, the insertion part 253 of the hanging-side stile-side upper corner block 25 is inserted and attached from the end face of the upper longitudinal end of the hanging-side vertical stile 23. Also, the insertion part 263 of the hanging-side stile-side lower corner block 26 is inserted and attached from the end face of the lower longitudinal end of the hanging-side vertical stile 23.

[0090] Next, with the hanging-side frame-side upper corner block 25 attached to the upper longitudinal end of the hanging-side vertical frame 23, as shown in Figure 11, the longitudinal end 210a of the upper frame 21 is inserted into the glass arrangement groove 230 of the hanging-side vertical frame 23 so that the hanging-side frame-side upper corner block 25 abuts against the longitudinal end 210a of the upper frame 21. Also, with the hanging-side frame-side lower corner block 26 attached to the lower longitudinal end of the hanging-side vertical frame 23, as shown in Figure 12, the longitudinal end 220a of the lower frame 22 is inserted into the glass arrangement groove 230 of the hanging-side vertical frame 23 so that the hanging-side frame-side lower corner block 26 abuts against the longitudinal end 220a of the lower frame 22.

[0091] Then, as shown in Figure 13, the screws 25a, 26a are moved from the outside to the inside in the left-right direction through the through holes 2311a, 2311b of the left-right outer plate 2311 of the vertical frame body 231 of the hanging side vertical frame 23, and as shown in Figures 11 and 12, the screws 25a, 26a are passed through the through holes 2312a, 2312b of the left-right inner plate 2312 of the vertical frame body 231 of the hanging side vertical frame 23 and the fixed side vertical plate portions 2551, 2651 of the reinforcing portions 255, 265, and fastened to the screw fastening portions 21a, 22a of the upper frame 21 and the lower frame 22 to fix them. Here, some of the screws 25a, 26a are arranged inside the upper corner block 25 on the frame side of the hanging base and the lower corner block 26 on the frame side of the hanging base, and the screws 25a, 26a are arranged passing through the inside of the upper corner block 25 on the frame side of the hanging base and the lower corner block 26 on the frame side of the hanging base.

[0092] By inserting screws 25a and 26a into the left-right inner plate 2312 of the vertical frame body 231 of the hanging side vertical frame 23, the fixed side vertical plate portions 2551 and 2651 of the reinforcing portions 255 and 265, and the screw fastening portions 21a and 22a of the upper frame 21 and the lower frame 22, screws 25a and 26a fasten the hanging side vertical frame 23 to the upper frame 21, and also fasten the hanging side vertical frame 23 to the lower frame 22. This allows the hanging side vertical frame 23, to which the hanging side frame upper corner block 25 is attached, to be fixed to the longitudinal end of the upper frame 21 with screws 25a, and the hanging side vertical frame 23, to which the hanging side frame lower corner block 26 is attached, to be fixed to the longitudinal end of the lower frame 22 with screws 26a.

[0093] The shoji screen 20 constructed as described above comprises corner blocks 25-28 provided between the vertical frames 23, 24 and the horizontal frames (upper frame 21, lower frame 22) at the corners of the frame body 200, overlapping portions 20a-20d where parts of the vertical frames 23, 24 and the horizontal frames (upper frame 21, lower frame 22) overlap when viewed from the front with the ends of the horizontal frames (upper frame 21, lower frame 22) positioned near the bottoms 230a, 240a of the glass placement grooves 230, 240 of the vertical frames 23, 24, and screws 25a, 26a, 27a, 28a (fixing members) which fasten the vertical frames 23, 24 and the horizontal frames (upper frame 21, lower frame 22) and at least parts of which are positioned inside the corner blocks 25-28.

[0094] Therefore, by providing corner blocks 25-28 between the vertical frames 23, 24 and the horizontal frames (upper frame 21, lower frame 22), the corner portions of the frame body 200 of the shoji screen 20 can be configured without additional notching at the longitudinal ends of the vertical frames 23, 24 and horizontal frames (upper frame 21, lower frame 22). This reduces the amount of additional notching at the longitudinal ends of the shapes of the vertical frames 23, 24 and horizontal frames (upper frame 21, lower frame 22). In addition, since there are overlapping portions 20a-20d in which parts of the vertical frames 23, 24 and the horizontal frames (upper frames 21, lower frames 22) overlap when viewed from the front side with the ends of the horizontal frames (upper frames 21, lower frames 22) positioned near the bottoms 230a, 240a of the glass placement grooves 230, 240 of the vertical frames 23, 24, it is possible to improve the strength of the corner portions of the frame body 200. Furthermore, since at least parts of the screws 25a, 26a, 27a, 28a are positioned inside the corner blocks 25-28, it is possible to improve the strength of the corner portions of the frame body 200.

[0095] In addition, in the shoji screen 20, the corner blocks 25, 26 have insertion portions 253, 263 that are inserted into the longitudinal ends of the vertical stile 23. Therefore, the corner blocks 25, 26 of the shoji screen 20 can be easily attached to the longitudinal ends of the vertical stile 23 in a positioned state.

[0096] In addition, in the shoji screen 20, the corner blocks 25, 26 have block main bodies 251, 261 each having an exterior configuration portion 252, 262 exposed to the outside and an insertion portion 253, 263 inserted into the longitudinal end of the vertical frame 23, and reinforcing portions 255, 265 attached to the block main bodies 251, 261 to reinforce the corners of the frame 200. As a result, since the exterior configuration portions 252, 262 are exposed to the outside, the exterior colors of the frame 10 and the corner blocks 25, 26 can be unified by appropriately setting the color of the exterior configuration portions 252, 262. Furthermore, the reinforcing portions 255, 265 can improve the strength of the corners of the frame 200.

[0097] Furthermore, in the shoji screen 20, the corner blocks 25-28 are positioned more outer circumferentially than the overlapping portions 20a-20d. This allows the corner blocks 25-28 to be provided on the outer circumferential side of the overlapping portions 20a-20d, where parts of the vertical frames 23, 24 and the horizontal frames (upper frame 21, lower frame 22) overlap, at the ends, without requiring additional cutout processing at the longitudinal ends of the vertical frames 23, 24. Therefore, while the strength of the corners of the shoji screen 20 is ensured by the overlapping portions 20a-20d, the assembly rigidity can be improved by providing the corner blocks 25-28 more outer circumferentially than the overlapping portions 20a-20d.

[0098] In addition, in the shoji screen 20, the longitudinal ends of the horizontal frames (upper frame 21, lower frame 22) are inserted into the glass placement grooves 230, 240 of the vertical frames 23, 24, and the longitudinal ends of the horizontal frames (upper frame 21, lower frame 22) abut against the visible surfaces of the bottoms 230a, 240a of the glass placement grooves 230, 240 of the vertical frames 23, 24. This improves the assembly strength between the horizontal frames (upper frame 21, lower frame 22) and the vertical frames 23, 24.

[0099] This method of installing a shoji screen 20 includes the steps of inserting and attaching the insertion portions 253, 263 of the corner blocks 25, 26 into the longitudinal ends of the vertical stiles 23, and fixing the vertical stiles 23 with the corner blocks 25, 26 attached to the longitudinal ends of the horizontal stiles (upper stile 21, lower stile 22) with screws 25a, 26a. This allows the corner blocks 25, 26 to be easily installed between the vertical stiles 23 and the horizontal stiles (upper stile 21, lower stile 22).

[0100] Next, we will explain the heated foam material 256 attached to the upper corner block 25 on the frame side of the hanging base, and the heated foam material 266 attached to the lower corner block 26 on the frame side of the hanging base. As mentioned above, the block main body parts 251, 261 of the upper corner block 25 on the frame side of the hanging base are made of resin, and the exterior components 252, 262 of the block main body parts 251, 261 form the exterior of the corner part of the shoji screen 20.

[0101] As shown in Figure 13, heated foaming materials 256, 266 are attached to the indoor side X2 surfaces of the facing panel parts 2522, 2622 of the exterior components 252, 262 of the block main bodies 251, 261 of the upper corner block 25 on the hanging side frame side and the lower corner block 26 on the hanging side frame side so as to foam toward the outer periphery of the shoji screen 20 and the indoor side X2. The heated foaming materials 256, 266 are formed in the shape of rectangular plates that have a thickness in the projection direction and extend in the left-right direction.

[0102] The heated foam material 256 is attached by being inserted into a groove provided on the indoor-side X2 surface of the facing panel 2522 of the exterior configuration part 252 of the block main body 251 of the hanging-side stile-side upper corner block 25. Because the metal reinforcing part 255 (metal part) is positioned below the heated foam material 256, the heated foam material 256 is positioned above the metal reinforcing part 255 (metal part). The heated foam material 266 is attached to the indoor-side X2 surface of the facing panel 2622 of the exterior configuration part 262 of the block main body 261 of the hanging-side stile-side lower corner block 26. Because the metal lower frame 12 made of a metal material is positioned below the heated foam material 266, the heated foam material 266 is positioned above the metal lower frame 12.

[0103] In the event of a fire, the heated foaming materials 256, 266 foam toward the frame 10 located on the outer periphery of the shoji screen 20 and toward the indoor side X2. When the resin block main body 251 melts due to the heat of a fire, the heated foaming material 256 falls and gets caught on the metal reinforcing part 255 located below the heated foaming material 256, where it foams. In the event of a fire, when the resin block main body 261 melts due to the heat of a fire, the heated foaming material 266 falls onto the metal lower frame 12 located below the heated foaming material 266 and foams from the lower frame 12. This improves fire resistance.

[0104] A first modified example of the first embodiment will be described. As shown in Fig. 14, the first modified example of the first embodiment is similar to the first embodiment in the hanging-side stile-side upper corner block 25 and the hanging-side stile-side lower corner block 26, and in the heated foam material 256, but differs in the attachment state of the heated foam material 266A and in that heated foam materials 257, 267 are further provided. In the first modified example of the first embodiment, the same description of the first embodiment is applied to the same configuration as the first embodiment.

[0105] In a first modification of the first embodiment, the heated foaming materials 256, 266A are inserted into grooves provided on the indoor side X2 surface of the facing panel portion 2522 of the exterior configuration portion 252 of the block main body portions 251, 261 of the hanging-side frame-side upper corner block 25 and the hanging-side frame-side lower corner block 26, so as to foam toward the outer periphery of the shoji screen 20 and the indoor side X2, as shown in Fig. 14. Because the metal reinforcing portion 255 (metal portion) is positioned below the heated foaming material 256, the heated foaming material 256 is positioned above the metal reinforcing portion 255 (metal portion). Because the metal lower frame 12 made of a metal material is positioned below the heated foaming material 266A, the heated foaming material 266A is positioned above the metal lower frame 12. In addition, the heated foaming material 257, 267 is attached to the surface opposite to the hanging-side vertical frame 23 side of the mating side horizontal plate portion 2552, 2652 of the metal reinforcing portion 255, 265 of the hanging-side frame side upper corner block 25 and the hanging-side frame side lower corner block 26 so that it foams toward the outer periphery of the shoji screen 20.

[0106] In the first modified example of the first embodiment, similarly to the first embodiment, in the event of a fire or the like, the heated foaming materials 256, 266A foam toward the frame body 10 located on the outer periphery of the shoji screen 20 and toward the room side X2. When the resin block main body 251 melts due to the heat of a fire, the heated foaming material 256 falls and gets caught on the metal reinforcing part 255 located below the heated foaming material 256, where it foams. When the resin block main body 261 melts due to the heat of a fire, the heated foaming material 266A falls onto the metal lower frame 12 located below the heated foaming material 266, and foams from the lower frame 12. In the event of a fire, if the resin block main bodies 251, 261 melt due to the heat of the flames, the heated foaming materials 257, 267 will foam toward the frame 10 located on the outer periphery of the shoji screen 20, sealing the gap between the shoji screen 20 and the frame 10 in the melted areas of the resin block main bodies 251, 261, as well as sealing the areas where the vertical and horizontal frames (upper and lower frames) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening. This reduces the penetration of heat from the flame in the forward direction of the vertical sliding window 1, thereby improving fire resistance.

[0107] The heated foam materials 257, 267 are attached to the mating side horizontal plate portions 2552, 2652 of the metal reinforcing portions 255, 265. Therefore, in the event of a fire or the like, even if the resin block main bodies 251, 261 melt due to the heat of the flames, the metal reinforcing portions 255, 265 do not melt, thereby reducing the risk of the heated foam materials 257, 267 falling from the upper corner block 25 on the hanging-side stile side and the lower corner block 26 on the hanging-side stile side. As a result, even if the resin block main body 251, 261 melts due to the heat of the flames in the event of a fire, the heated foaming materials 257, 267 attached to the mating side horizontal plate portions 2552, 2652 of the metal reinforcing portions 255, 265 will foam toward the outer periphery of the shoji screen 20, sealing the gap between the shoji screen 20 and the frame 10, as well as sealing the portions where the vertical and horizontal frames (upper and lower frames) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening. This effectively reduces the penetration of heat from the flames in the forward direction of the vertical sliding window 1. This further improves fire resistance.

[0108] A second modified example of the first embodiment will be described. As shown in FIG. 15 , the second modified example of the first embodiment differs from the first embodiment in that the shapes of the reinforcing portions 255A, 265A and the positions of the heated foam materials 258, 268 are different. As shown in FIG. 15 , the second modified example of the first embodiment differs from the first embodiment in that, in addition to the configuration of the reinforcing portions 255, 265 of the first embodiment, the metal reinforcing portions 255A, 265A are provided with outer horizontal plate portions 2553, 2653 extending a predetermined length outward in the left-right direction from the end of the fixed-side vertical plate portion 2551, 2651 opposite the mating-side horizontal plate portion 2552, 2652 in the up-down direction, and the heated foam materials 258, 268 are attached to the surfaces of the outer horizontal plate portions 2553, 2653 opposite the hanging-side vertical stile 23 and the door-end-side vertical stile 24. In the second modified example of the first embodiment, the same configuration as in the first embodiment is described with reference to the first embodiment.

[0109] As shown in Figure 15, the metal reinforcement portion 255A, 265A of the second modified example of the first embodiment has a fixed side vertical plate portion 2551, 2651 that has a thickness in the left-right direction and a width in the up-down direction and extends in the forward direction, a plate-shaped mating side horizontal plate portion 2552, 2652 that extends outward in the left-right direction from the end of the fixed side vertical plate portion 2551, 2651 on the up-down direction toward the hanging side vertical frame 23, and an outer horizontal plate portion 2553, 2635 that extends outward in the left-right direction by a predetermined length from the end of the fixed side vertical plate portion 2551, 2651 opposite the mating side horizontal plate portion 2552, 2652.

[0110] In the second modification of the first embodiment, the heated foaming materials 258, 268 are attached to the outer surfaces (upper or lower surfaces) of the outer horizontal plate portions 2553, 2635 of the metal reinforcing portions 255A, 265A in the vertical direction so as to foam toward the outer periphery of the shoji screen 20. In the event of a fire or the like, if the resin block main bodies 251A, 261A melt due to the heat of the flames, the heated foaming materials 258, 268 foam toward the frame 10 located on the outer periphery of the shoji screen 20, sealing the gap between the shoji screen 20 and the frame 10 in the melted portions of the resin block main bodies 251A, 261A, sealing the portions where the vertical and horizontal frames (upper and lower frames) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening hole. This reduces the penetration of heat from the flames in the forward direction of the vertical sliding window 1. Therefore, the fire prevention performance can be improved.

[0111] The heated foam materials 258, 268 are attached to the outer surfaces in the vertical direction of the outer horizontal plate portions 2553, 2635 of the metal reinforcing portions 255A, 265A. Therefore, in the event of a fire or the like, even if the resin block main bodies 251A, 261A melt due to the heat of the flames, the metal reinforcing portions 255A, 265A do not melt, thereby reducing the risk of the heated foam materials 258, 268 falling from the hanging-side stile-side upper corner block 25 and the hanging-side stile-side lower corner block 26. As a result, even if the resin block main body 251A, 261A melts due to the heat of the flames in the event of a fire, the heated foaming materials 258, 268 attached to the outer horizontal plate portions 2553, 2635 of the metal reinforcing portions 255A, 265A will foam toward the outer periphery of the shoji screen 20, sealing the gap between the shoji screen 20 and the frame 10, sealing the portions where the vertical and horizontal frames (upper and lower frames) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening. This effectively reduces the penetration of heat from the flames in the forward direction of the vertical sliding window 1. This further improves fire resistance.

[0112] The method of attaching the heated foam materials 256, 266, 266A, 257, 267, 258, 268 to the corner blocks 25, 26 is not limited, and the heated foam materials 256, 266, 266A, 257, 267, 258, 268 may be attached, for example, by sticking them to the corner blocks 25, 26, or by providing an arrangement groove in the corner blocks 25, 26 and inserting them into the arrangement groove, or by providing an arrangement space in the corner blocks 25, 26 and inserting them into the arrangement space.

[0113] Next, a second embodiment will be described. In the second embodiment, the fitting is configured as a double sliding window 1A.

[0114] As shown in Figure 16, the sliding window 1A (fitting) of the second embodiment is composed of a frame 30 attached to an opening 110 in a building skeleton 100, and two shoji screens fitted inside the frame 30: an outer shoji screen 40 (shoji screen) placed on the outside X1, and an inner shoji screen 50 (shoji screen) placed on the inside X2. The outer shoji screen 40 and the inner shoji screen 50 are slidably arranged within the frame 30, and slide within the frame 30 in the left-right direction (horizontal direction) of the viewing direction. The sliding window 1A (fitting) constitutes a sliding window in which the outer shoji screen 40 and the inner shoji screen 50 can slide left-right. The frame 30 is fixed to the building skeleton 100.

[0115] The frame body 30 is formed by a rectangular frame of an upper frame 31 (horizontal frame), a lower frame 32 (horizontal frame), and left and right vertical frames 33, 34. The upper frame 31, the lower frame 32, and the left and right vertical frames 33, 34 are formed by extruding a metal material such as aluminum. As shown in Figure 17, the upper frame 31 is provided with an exterior rail 311 and an interior rail 312. The exterior rail 311 is formed to protrude downward from the upper frame 31 at the exterior side X1 of the upper frame 31 and guides the upper end of the outer shoji screen 40. The interior rail 312 is formed to protrude downward from the upper frame 31 at the interior side X2 of the upper frame 31 and guides the upper end of the inner shoji screen 50.

[0116] The lower frame 32 is provided with an exterior rail 321 and an interior rail 322. The exterior rail 321 is formed to protrude upward from the lower frame 32 at the exterior side X1 of the lower frame 32, and guides the lower end of the outer shoji screen 40. The interior rail 322 is formed to protrude upward from the lower frame 32 at the interior side X2 of the lower frame 32, and guides the lower end of the inner shoji screen 50.

[0117] As shown in Figure 16, the four corners of the frame body 30 are provided with a frame-side upper left corner block 35 (corner block), a frame-side lower left corner block 36 (corner block), a frame-side upper right corner block 37 (corner block), and a frame-side lower right corner block 38 (corner block).

[0118] At the four corner portions of the frame body 30, similar to the corner portions of the frame body 10 of the first embodiment, the upper frame 31, the lower frame 32 and the left and right vertical frames 33, 34 are all formed by cutting only the longitudinal ends in a direction perpendicular to the longitudinal direction, and no additional cutout processing is performed, so that they are formed in a so-called raw cut state.

[0119] In the frame body 30 of the second embodiment, while the frame body 10 of the first embodiment has overlapping portions 10a, 10b where the upper frame 11 and the vertical frames (hanging side vertical frame 13, door end side vertical frame 14) overlap, the frame body 30 does not have overlapping portions where the horizontal frames (upper frame 31, lower frame 32) and the vertical frames (left and right vertical frames 33, 34) overlap.

[0120] Specifically, in the second embodiment, the longitudinal end of the upper frame 31 on the vertical frame 33 side is not swallowed up by the vertical frame 33, and the longitudinal end of the upper frame 31 on the vertical frame 33 side does not overlap with the vertical frame 33. Furthermore, the longitudinal end of the upper frame 31 on the vertical frame 34 side is not swallowed up by the vertical frame 34, and the longitudinal end of the upper frame 31 on the vertical frame 34 side does not overlap with the vertical frame 34. Furthermore, in the frame body 30 of the second embodiment, as with the frame body 10 of the first embodiment, the longitudinal end of the lower frame 32 on the vertical frame 33 side is not swallowed up by the vertical frame 33, and the longitudinal end of the lower frame 32 on the vertical frame 33 side does not overlap with the vertical frame 33. Furthermore, the longitudinal end of the lower frame 32 on the vertical frame 34 side is not swallowed up by the vertical frame 34, and the longitudinal end of the lower frame 32 on the vertical frame 34 side does not overlap with the vertical frame 34.

[0121] The four corner blocks of the frame body 30 of the second embodiment (frame-side upper left corner block 35, frame-side lower left corner block 36, frame-side upper right corner block 37, and frame-side lower right corner block 38) have the same basic configuration as the four corner blocks 15 to 18 of the frame body 10 of the first embodiment. Therefore, the explanation of the corner blocks 35 to 38 of the frame body 30 of the second embodiment will be omitted, and the explanation of the four corner blocks 15 to 18 of the frame body 10 of the first embodiment will be used.

[0122] As shown in Figures 16 to 18, the outer shoji screen 40 is constructed by fitting glass 401, which is made up of two glass plates, inside a frame body 400 which is made up of an upper frame 41 (horizontal member), a lower frame 42 (horizontal member), a front-end vertical frame 43 (vertical member) located on the door front side, and an outer joining vertical frame 44 (vertical member) which is a vertical frame located on the door rear end, all assembled into a rectangular shape. As shown in Figure 2, the outer shoji screen 40 is engaged with the outdoor rails 311, 321 of the upper frame 31 and the lower frame 32 so as to be movable in the left-right direction. The lower frame 42 of the outer shoji screen 40 is provided with a door roller 61 which rolls on the outdoor rail 321 of the lower frame 32.

[0123] As shown in Figures 16 to 18, the inner shoji screen 50 is constructed by fitting glass 501, which is made up of two glass plates, inside a frame body 500 which is constructed by assembling an upper frame 51 (horizontal member), a lower frame 52 (horizontal member), a front-end vertical frame 53 (vertical member) located on the door front side, and an inner joining vertical frame 54 (vertical member) located on the door rear side into a rectangular frame assembly. As shown in Figure 2, the inner shoji screen 50 is engaged with the interior rails 312, 322 of the upper frame 31 and the lower frame 32 so as to be movable in the left-right direction. The lower frame 52 of the inner shoji screen 50 is provided with a door roller 62 which rolls on the interior rail 322 of the lower frame 32.

[0124] In this embodiment, the upper frame 41, the lower frame 42, the door-front vertical frame 43 located on the door-front side, and the outer joining vertical frame 44, which is a vertical frame located on the door-end side, of the outer shoji screen 40 correspond to the upper frame 51, the lower frame 52, the door-front vertical frame 53 located on the door-front side, and the inner joining vertical frame 54 (vertical member) located on the door-end side of the inner shoji screen 50, and all have the same basic configuration. Therefore, in this embodiment, the inner shoji screen 50 will be described in detail, and the description of the outer shoji screen 40 will be omitted, citing the description of the inner shoji screen 50.

[0125] As shown in Figures 19 to 21, the four corner portions of the frame body 500 of the inner shoji screen 50 are provided with an upper corner block 55 (corner block) on the inner joining vertical frame side, a lower corner block 56 (corner block) on the inner joining vertical frame side, an upper corner block 57 (corner block) on the door edge side frame side, and a lower corner block 58 (corner block) on the door edge side frame side.

[0126] As shown in Figures 19 to 22 and 24, the inner joining vertical stile side upper corner block 55 is provided between the inner joining vertical stile 54 and the upper stile 51 at the corner where the inner joining vertical stile 54 and the upper stile 51 are combined, and connects the inner joining vertical stile 54 and the upper stile 51. The inner joining vertical stile side upper corner block 55 is arranged such that the lower insertion portion 553 (see Figures 22 and 25) is inserted into the end of the inner joining vertical stile 54 from the fore-end face of the upper end of the inner joining vertical stile 54 in the longitudinal direction, and the side face is arranged facing the fore-end face of the end of the upper stile 51 on the inner joining vertical stile 54 side in the longitudinal direction.

[0127] 19 to 21, 23, and 24, the inner joining vertical stile side lower corner block 56 is provided between the inner joining vertical stile 54 and the lower stile 52 at the corner where the inner joining vertical stile 54 and the lower stile 52 are combined, and connects the inner joining vertical stile 54 and the lower stile 52. The inner joining vertical stile side lower corner block 56 is arranged such that the upper insertion portion 563 (see FIGS. 23 and 25) is inserted into the end of the inner joining vertical stile 54 from the fore-end face of the lower end in the longitudinal direction of the inner joining vertical stile 54, and the side face is arranged facing the fore-end face of the end of the lower stile 52 on the inner joining vertical stile 54 side in the longitudinal direction.

[0128] As shown in Figures 19 to 22 and 24, the leading-side stile-side upper corner block 57 is provided between the leading-side stile 53 and the upper stile 51 at the corner where the leading-side stile 53 and the upper stile 51 are combined, and connects the leading-side stile 53 and the upper stile 51. The leading-side stile-side upper corner block 57 is arranged so that its lower insertion portion 573 (see Figures 22 and 26) is inserted into the end of the leading-side stile 53 from the edge of the upper end of the leading-side stile 53 in the longitudinal direction, and its side surface is arranged facing the edge of the end of the upper stile 51 on the leading-side stile 53 side in the longitudinal direction.

[0129] As shown in Figures 19 to 21, 23 and 24, the lower corner block 58 on the leading edge side stile is provided between the leading edge side stile 53 and the bottom stile 52 at the corner where the leading edge side stile 53 and the bottom stile 52 are combined, and connects the leading edge side stile 53 and the bottom stile 52. The lower corner block 58 on the leading edge side stile is arranged such that its upper insertion portion 583 (see Figures 23 and 26) is inserted into the end of the leading edge side stile 53 from the edge of the lower longitudinal end of the leading edge side stile 53, and its side surface is arranged facing the edge of the end of the bottom stile 52 on the leading edge side stile 53 side in the longitudinal direction.

[0130] At the four corners of the frame 500, the upper frame 51, the lower frame 52, the door-end vertical frame 53 and the inner joining vertical frame 54 are all formed by simply cutting the longitudinal ends in a direction perpendicular to the longitudinal direction, as shown in Figures 21, 25 and 26, and no additional cutouts are made, so they are formed in a so-called raw cut state.

[0131] 19 and 22, when the inner joining vertical frame side upper corner block 55 is installed between the upper frame 51 and the inner joining vertical frame 54, as shown in Fig. 22, the end 510a of the upper frame 51 on the inner joining vertical frame 54 side in the longitudinal direction is swallowed into the glass arrangement groove 540 (swallowing portion, glass groove) in which the glass 501 of the inner joining vertical frame 54 is swallowed and arranged, and is arranged near the bottom 540a of the glass arrangement groove 540 of the inner joining vertical frame 54. The end 510a of the upper frame 51 on the inner joining vertical frame 54 side in the longitudinal direction is arranged in contact with the visible surface of the bottom 540a of the glass arrangement groove 540 of the inner joining vertical frame 54. In this state, as shown in Figures 20 and 22, an overlapping portion 50a is formed where parts of the upper frame 51 and the inner joining vertical frame 54 overlap when viewed from the front side.

[0132] 19 and 23, when the lower corner block 56 on the inner joining vertical frame side is provided between the lower frame 52 and the inner joining vertical frame 54, as shown in FIG. 23, the end 520a of the lower frame 52 on the inner joining vertical frame 54 side in the longitudinal direction is swallowed into the glass arrangement groove 540 (swallowing portion, glass groove) in which the glass 501 of the inner joining vertical frame 54 is swallowed and arranged, and is arranged near the bottom 540a of the glass arrangement groove 540 of the inner joining vertical frame 54. The end 520a of the lower frame 52 on the inner joining vertical frame 54 side in the longitudinal direction is arranged in contact with the visible surface of the bottom 540a of the glass arrangement groove 540 of the inner joining vertical frame 54. In this state, as shown in Figures 20 and 23, an overlapping portion 50b is formed in which parts of the lower frame 52 and the inner joining vertical frame 54 overlap when viewed from the front side.

[0133] 19 and 22, when the door-front-side stile-side upper corner block 57 is provided between the upper stile 51 and the door-front-side stile 53, as shown in Fig. 22, the end 510b of the upper stile 51 on the door-front-side stile 53 side in the longitudinal direction is swallowed into the glass arrangement groove 530 (swallowing portion, glass groove) in which the glass 501 in the door-front-side stile 53 is swallowed and arranged, and is arranged near the bottom 530a of the glass arrangement groove 530 of the door-front-side stile 53. The end 510b of the upper stile 51 on the door-front-side stile 53 side in the longitudinal direction is arranged in contact with the visible surface of the bottom 530a of the glass arrangement groove 530 of the door-front-side stile 53. In this state, as shown in Figures 20 and 22, an overlapping portion 50c is formed in which parts of the upper frame 51 and the door-end side vertical frame 53 overlap when viewed from the front side.

[0134] 19 and 23, when the door-front-side stile-side lower corner block 58 is installed between the bottom stile 52 and the door-front-side vertical stile 53, as shown in FIG. 23, the longitudinal end 520b of the bottom stile 52 is swallowed into the glass arrangement groove 530 (swallowing portion, glass groove) in which the glass 501 of the door-front-side vertical stile 53 is swallowed and arranged, and is arranged near the bottom 530a of the glass arrangement groove 530 of the door-front-side vertical stile 53. The longitudinal end 520b of the bottom stile 52 is arranged in contact with the visible surface of the bottom 530a of the glass arrangement groove 530 of the door-front-side vertical stile 53. In this state, as shown in FIGS. 20 and 23, an overlapping portion 50d is formed in which parts of the door-front-side stile 52 and the door-front-side vertical stile 53 overlap when viewed in the visible direction.

[0135] The upper corner block 55 on the inner joining vertical frame side and the upper corner block 57 on the door-end side frame side will be described. As shown in Figure 20, the upper corner block 55 on the inner joining vertical frame side is positioned closer to the outer periphery of the frame body 500 than the overlapping portion 50a where parts of the upper frame 51 and the inner joining vertical frame 54 overlap when viewed from the front. The upper corner block 57 on the door-end side frame side is positioned closer to the outer periphery of the frame body 500 than the overlapping portion 50c where parts of the upper frame 51 and the door-end side vertical frame 53 overlap when viewed from the front.

[0136] 25 and 26, the interior joining vertical stile-side upper corner block 55 and the door-end side stile-side upper corner block 57 have block main bodies 551, 571 (resin parts) made of resin and extending in the vertical direction, and metal frame parts 555, 575 (reinforcement parts) attached to the upper sides of the block main bodies 551, 571. The interior joining vertical stile-side upper corner block 55 and the door-end side stile-side upper corner block 57 are each composed of two main parts: the block main bodies 551, 571 (resin parts) made of resin, and the metal frame parts 555, 575 (metal parts) made of metal material.

[0137] If the resin block main body parts 551, 571 are damaged when the upper corner block 55 on the joining vertical stile side and the upper corner block 57 on the door edge side are installed, only the resin block main body parts 551, 571 can be removed from the upper corner block 55 on the joining vertical stile side and the upper corner block 57 on the door edge side by removing the appropriate screws, etc.

[0138] Cover members 550, 570 are attached to the indoor side X2 portions of the small end faces of the upper ends of the inner joining vertical frame 54 and the door-front side vertical frame 53 on the indoor side X2 of the upper corner block 55 on the inner joining vertical frame side and the upper corner block 57 on the door-front side frame side.

[0139] The block main body portions 551, 571 are configured as an integrated part in which upper constituent portions 552, 572 (exterior constituent portions) that are placed at the top and exposed to the outside and insertion portions 553, 573 that are placed at the bottom are integrated.

[0140] The upper end sides of the upper constituent parts 552, 572 are exposed to the outside, and metal frame parts 555, 575 are attached at a position a predetermined height lower than the upper end of the upper constituent parts 552, 572. Cutout parts 5521, 5721 that serve as rail running grooves along which the indoor rail 312 of the upper frame 31 runs are formed at the upper end of the upper constituent parts 552, 572. Because the block main body parts 551, 571 are made of resin, metallic noises can be prevented when the indoor rail 312 of the upper frame 31 runs along the cutout parts 5521, 5721.

[0141] The insertion portions 553, 573 are inserted and positioned inside the ends of the inner joining vertical frame 54 and the door-end side vertical frame 53 from the small end faces of the upper longitudinal ends of the inner joining vertical frame 54 and the door-end side vertical frame 53.

[0142] The metal frame portions 555, 575 are formed so as to surround a part of the upper side of the block main body portions 551, 571. The metal frame portions 555, 575 reinforce the corner portions of the frame 500.

[0143] The metal frame portions 555, 575 have exterior sight panel portions 5551, 5751 arranged on the exterior side X1 and extending in the sight direction, interior sight panel portions 5552, 5752 arranged on the interior side X2 and extending in the sight direction, and interior sight panel portions 5553, 5753 and exterior sight panel portions 5554, 5754 that extend in the sight direction and connect the exterior sight panel portions 5551, 5751 and the interior sight panel portions 5552, 5752. The interior sight panel portions 5553, 5753 and exterior sight panel portions 5554, 5754 have their upper end portions cut out in a U-shape that opens upward along the cutout portions 5521, 5721 of the upper constituent portions 552, 572.

[0144] The lower corner block 56 on the inner joining vertical frame side and the lower corner block 58 on the door-end side will be described. As shown in Figure 20, the lower corner block 56 on the inner joining vertical frame side is positioned closer to the outer periphery of the frame body 500 than the overlapping portion 50b where parts of the lower frame 52 and the inner joining vertical frame 54 overlap when viewed from the front. The lower corner block 58 on the door-end side is positioned closer to the outer periphery of the frame body 500 than the overlapping portion 50d where parts of the lower frame 52 and the door-end side vertical frame 53 overlap when viewed from the front.

[0145] 25 and 26, the inner stile-side lower corner block 56 and the door-end stile-side lower corner block 58 have block main bodies 561, 581 (resin parts) made of resin and extending in the vertical direction, and metal frame parts 565, 585 (reinforcement parts) attached to the lower sides of the block main bodies 561, 581. The inner stile-side lower corner block 56 and the door-end stile-side lower corner block 58 are each composed of two main parts: the block main bodies 561, 581 (resin parts) made of resin, and the metal frame parts 565, 585 (metal parts) made of metal.

[0146] If the resin block main bodies 561, 581 are damaged when the lower corner block 56 on the inner joining vertical stile side and the lower corner block 58 on the door edge side are installed, only the resin block main bodies 561, 581 can be removed from the lower corner block 56 on the inner joining vertical stile side and the lower corner block 58 on the door edge side by removing the appropriate screws, etc.

[0147] Cover members 560, 580 are attached to the indoor side X2 portions of the small end faces of the inner joining vertical frame 54 and the upper end of the door-front side vertical frame 53 on the indoor side X2 of the lower corner block 56 on the inner joining vertical frame side and the lower corner block 58 on the door-front side frame side.

[0148] The block main body portions 561, 581 are configured as an integrated part in which lower component portions 562, 582 (exterior component portions) that are arranged at the bottom and exposed to the outside and insertion portions 563, 583 that are arranged at the top are integrated.

[0149] The lower end sides of the lower constituent parts 562, 582 are arranged exposed to the outside, and metal frame parts 565, 585 are attached at a position a predetermined height higher than the lower end of the lower constituent parts 562, 582. Cutout parts 5621, 5821 that serve as rail running grooves along which the indoor rail 322 of the lower frame 32 runs are formed at the lower end of the lower constituent parts 562, 582. Because the block main body parts 561, 581 are made of resin, metallic noise can be prevented from being generated when the indoor rail 322 of the lower frame 32 runs along the cutout parts 5621, 5821.

[0150] The insertion portions 563, 583 are inserted and positioned inside the ends of the inner joining vertical frame 54 and the door-end side vertical frame 53 from the small end faces of the lower longitudinal ends of the inner joining vertical frame 54 and the door-end side vertical frame 53.

[0151] The metal frame portions 565, 585 are formed so as to surround a part of the upper side of the block main body portions 561, 581. The metal frame portions 565, 585 reinforce the corner portions of the frame 500.

[0152] The metal frame portions 565, 585 have exterior facing panel portions 5651, 5851 arranged on the exterior side X1 and extending in the facing direction, interior facing panel portions 5652, 5852 arranged on the interior side X2 and extending in the facing direction, and interior facing panel portions 5653, 5853 and exterior facing panel portions 5654, 5854 which connect the exterior facing panel portions 5651, 5851 and the interior facing panel portions 5652, 5852 and extend in the facing direction.

[0153] We will explain the procedure for assembling the inner joining vertical frame 54 and the upper frame 51 with the inner joining vertical frame side upper corner block 55 interposed between them, and the procedure for assembling the door end side vertical frame 53 and the upper frame 51 with the door end side frame side upper corner block 57 interposed between them.

[0154] First, as shown in Figures 25 and 26, with the metal frame portions 555, 575 attached to the upper sides of the block main bodies 551, 571 of the upper corner block 55 on the inner joining vertical stile side and the upper corner block 57 on the door-front stile side, the insertion portions 553, 573 of the block main bodies 551, 571 are inserted and attached from the small end faces of the upper longitudinal ends of the inner joining vertical stile 54 and the door-front vertical stile 53.

[0155] Then, the screws 55a, 57a (fixing members) are moved from the outside to the inside of the through holes 541a, 531a in the left-right outer panels 541, 531 of the inner joining vertical frame 54 and the door-end side vertical frame 53, passing through the through holes 541a, 531a, and as shown in Figure 22, the screws 55a, 57a are passed through the through holes 542a, 532a in the left-right inner panels 542, 532 of the inner joining vertical frame 54 and the door-end side vertical frame 53 and the mounting brackets 554, 574 fixed to the metal frame portions 555, 575, and fastened to the screw fastening portions 51a of the upper frame 51 to fix them. Here, some of the screws 55a, 57a are arranged inside the upper corner block 55 on the inner joining vertical stile side and the upper corner block 57 on the door edge side stile side, and the screws 55a, 57a are arranged passing through the inside of the upper corner block 55 on the inner joining vertical stile side and the upper corner block 57 on the door edge side stile side.

[0156] By inserting screws 55a, 57a into the inner left-right inner plates 542, 532 of the inner joining vertical frame 54 and the door-front vertical frame 53, the mounting brackets 554, 574 fixed to the metal frame portions 555, 575, and the screw fastening portion 51a of the upper frame 51, the screws 55a, 57a fasten the inner joining vertical frame 54 and the upper frame 51, and also fasten the door-front vertical frame 53 and the upper frame 21. As a result, the inner joining vertical frame 54, to which the inner joining vertical frame upper corner block 55 is attached, is fixed to the longitudinal end of the upper frame 51 on the inner joining vertical frame 54 side with screws 55a, and the door-end side vertical frame 53, to which the door-end side frame upper corner block 57 is attached, is fixed to the longitudinal end of the upper frame 51 on the door-end side vertical frame 53 side with screws 57a.

[0157] The screws 55a, 57a are inserted into the left and right inner panels 542, 532 of the inner joining vertical frame 54 and the door-front vertical frame 53, the mounting brackets 554, 574 fixed to the metal frame parts 555, 575, and the screw fastening part 51a of the upper frame 51, and tighten them together to secure them in place.Therefore, even if the inner shoji screen 50 slides and the upper corner block 55 on the joining vertical frame side and the upper corner block 57 on the door-front frame side hit the shoji stopper (not shown), the upper corner block 55 on the joining vertical frame side and the upper corner block 57 on the door-front frame side can be prevented from coming off. In addition, the screws 55a, 57a secure the metal parts of the mounting brackets 554, 574 fixed to the metal frame parts 555, 575 and the left and right inner panels 542, 532 of the inner joining vertical frame 54 and the door end vertical frame 53, and the screw fastening part 51a of the upper frame 51, so that the fastening is strong.

[0158] We will explain the procedure for assembling the inner joining vertical frame 54 and the lower frame 52 with the inner joining vertical frame side lower corner block 56 interposed between them, and the procedure for assembling the door end side vertical frame 53 and the lower frame 52 with the door end side frame side lower corner block 58 interposed between them.

[0159] First, as shown in Figures 25 and 26, with the metal frame portions 565, 585 attached to the lower sides of the block main bodies 561, 581 of the lower corner block 56 on the inner joining vertical stile side and the lower corner block 58 on the door-front stile side, the insertion portions 563, 583 of the block main bodies 561, 581 are inserted and attached from the small end faces of the lower longitudinal ends of the inner joining vertical stile 54 and the door-front vertical stile 53.

[0160] Then, the screws 56a, 58a are moved from the outside to the inside of the through holes 541b, 531b in the left-right outer panels 541, 531 of the inner joining vertical frame 54 and the door-end vertical frame 53, and as shown in Figure 23, the screws 56a, 58a are passed through the through holes 542b, 532b in the left-right inner panels 542, 532 of the door-end vertical frame 53 and the mounting brackets 564, 584 fixed to the metal frame portions 565, 585, and fastened to the screw fastening portions 52a of the bottom frame 52 to secure them. Here, some of the screws 56a, 58a are arranged inside the lower corner block 56 on the inner joining vertical stile side and the lower corner block 58 on the door edge side stile side, and the screws 56a, 58a are arranged passing through the inside of the lower corner block 56 on the inner joining vertical stile side and the lower corner block 58 on the door edge side stile side.

[0161] By inserting the screws 56a, 58a into the inner left-right inner plates 542, 532 of the inner joining vertical frame 54 and the door-front vertical frame 53, the mounting brackets 564, 584 fixed to the metal frame portions 565, 585, and the screw fastening portion 52a of the bottom frame 52, the screws 56a, 58a fasten the inner joining vertical frame 54 to the bottom frame 22, and also fasten the door-front vertical frame 53 to the bottom frame 22. As a result, the inner joining vertical frame 54, to which the inner joining vertical frame side lower corner block 56 is attached, is fixed to the end of the bottom frame 52 on the inner joining vertical frame 54 side in the longitudinal direction with screws 56a, and the door-end side vertical frame 53, to which the door-end side frame side lower corner block 58 is attached, is fixed to the end of the bottom frame 52 on the door-end side vertical frame 53 side in the longitudinal direction with screws 58a.

[0162] The screws 56a, 58a are inserted into the left and right inner panels 542, 532 of the inner joining vertical frame 54 and the door-front vertical frame 53, the mounting brackets 564, 584 fixed to the metal frame parts 565, 585, and the screw fastening part 52a of the lower frame 52, and are fastened together and fixed in place.Therefore, even if the inner shoji screen 50 slides and the lower corner block 56 on the inner joining vertical frame side and the lower corner block 58 on the door-front frame side hit the shoji stopper (not shown), the lower corner block 56 on the inner joining vertical frame side and the lower corner block 58 on the door-front frame side can be prevented from coming off. In addition, the screws 56a, 58a secure the metal parts of the inner left-right inner plates 542, 532 of the inner joining vertical frame 54 and the door-end vertical frame 53, the mounting brackets 564, 584 fixed to the metal frame parts 565, 585, and the screw fastening part 52a of the lower frame 52, so the fastening is strong.

[0163] The inner shoji screen 50 constructed as described above comprises corner blocks 55-58 provided between the vertical frames 54, 53 and the horizontal frames (upper frame 51, lower frame 52) at the corners of the frame body 500, overlapping portions 50a-50d where portions of the vertical frames 53, 54 and the horizontal frames (upper frame 51, lower frame 52) overlap when viewed from the front, and screws 55a, 56a, 57a, 58a (fixing members) that fasten the vertical frames 54, 53 and the horizontal frames (upper frame 51, lower frame 52) and at least portions of which are arranged inside the corner blocks 55-58.

[0164] Therefore, by providing corner blocks 55-58 between the vertical frames 54, 53 and the horizontal frames (upper frame 51, lower frame 52), the corner portion of the frame body 500 of the inner shoji screen 50 can be configured without additional notching at the longitudinal ends of the vertical frames 54, 53 and horizontal frames (upper frame 51, lower frame 52). Therefore, it is possible to reduce the amount of additional notching at the longitudinal ends of the shapes of the vertical frames 54, 53 and horizontal frames (upper frame 51, lower frame 52). In addition, with the ends of the horizontal frames (upper frame 51, lower frame 52) positioned near the bottoms 530a, 540a of the glass placement grooves 530, 540 of the vertical frames 53, 54, parts of the vertical frames 54, 53 and the horizontal frames (upper frame 51, lower frame 52) overlap when viewed from the front, thereby improving the strength of the corners of the frame 500. Furthermore, since at least parts of the screws 55a, 56a, 57a, 58a are positioned inside the corner blocks 55-58, the strength of the corners of the frame 500 can be improved.

[0165] In the inner shoji screen 50, the corner blocks 55 to 58 have insertion portions 553 to 583 that are inserted into the longitudinal ends of the vertical frames 54, 53. Therefore, the corner blocks 55 to 58 of the inner shoji screen 50 can be easily attached to the longitudinal ends of the vertical frames 54, 53 in a positioned state.

[0166] In the inner shoji screen 50, the corner blocks 55 to 58 have block main bodies 551, 561, 571, 581 made of resin and extending in the vertical direction, and metal frame bodies 555, 565, 575, 585 attached to the block main bodies 551, 561, 571, 581. Therefore, the corner blocks 55 to 58 are mainly composed of two members, the block main bodies 551, 561, 571, 581 made of resin, and the metal frame bodies 555, 565, 575, 585. Therefore, the block main bodies 551, 561, 571, 581 have upper components 552, 572 or lower components 562, 582 that are located at the top and exposed to the outside. Therefore, by appropriately setting the color of the block main bodies 551, 561, 571, 581, the exterior colors of the frame body 300 and the corner blocks 55 to 58 can be unified. Furthermore, since the resin block main bodies 551, 561, 571, and 581 can be removed, if the block main bodies 551, 561, 571, and 581 are damaged, they can be easily replaced. Furthermore, since the metal frame portions 555, 565, 575, and 585 are provided, the strength of the corners of the frame 500 can be improved.

[0167] Furthermore, in the inner shoji screen 50, the corner blocks 55 to 58 have cutouts 5521, 5621, 5721, and 5821 that serve as rail running grooves along which the rails of the frame body 300 (the indoor side rail 312 of the upper frame 31 and the indoor side rail 322 of the lower frame 32) run. This eliminates the need for additional processing on the longitudinal ends of the vertical frames 54 and 53 to provide the rail running grooves, and it is possible to provide rail running grooves along which the rails of the frame body 300 (the indoor side rail 312 of the upper frame 31 and the indoor side rail 322 of the lower frame 32) run without additional cutout processing on the vertical frames 54 and 53.

[0168] Furthermore, in the inner shoji screen 50, the corner blocks 55-58 are positioned more outer periphery than the overlapping portions 50a-50d. This allows the corner blocks 55-58 to be provided on the outer periphery of the overlapping portions 50a-50d, where portions of the vertical stiles 54, 53 and the horizontal stiles (upper stile 51, lower stile 52) overlap, at the ends, without requiring additional cutouts to be made in the longitudinal direction of the vertical stiles 54, 53. Therefore, while the overlapping portions 50a-50d ensure the strength of the corners of the inner shoji screen 50, by providing the corner blocks 55-58 more outer periphery than the overlapping portions 50a-50d with less cutouts made in the longitudinal direction of the shaped members of the vertical stiles 54, 53 and the horizontal stiles (upper stile 51, lower stile 52), the assembly rigidity can be improved.

[0169] In addition, in the inner shoji screen 50, the longitudinal ends of the horizontal frames (upper frame 51, lower frame 52) are inserted into the glass placement grooves 540, 530 of the vertical frames 54, 53, and the longitudinal ends of the horizontal frames (upper frame 51, lower frame 52) abut against the visible surfaces of the bottoms 540a, 530a of the glass placement grooves 540, 530 of the vertical frames 54, 53. This improves the assembly strength between the horizontal frames (upper frame 51, lower frame 52) and the horizontal frames (upper frame 51, lower frame 52).

[0170] This method of installing inner shoji screen 50 includes the steps of inserting insertion portions 553-583 of corner blocks 55-58 into the longitudinal ends of vertical frames 54, 53 and fixing vertical frames 54, 53 with corner blocks 55-58 attached to the longitudinal ends of horizontal frames (upper frame 51, lower frame 52) with screws 55a-58a. This allows corner blocks 55-58 to be easily installed between vertical frames 54, 53 and horizontal frames (upper frame 51, lower frame 52).

[0171] Next, we will explain the heated foam material 556 attached to the interior joining vertical stile side upper corner block 55, the heated foam material 566 attached to the interior joining vertical stile side lower corner block 56, the heated foam material 576 attached to the door edge side stile side upper corner block 57, and the heated foam material 586 attached to the door edge side stile side lower corner block 58. As mentioned above, the block main bodies 551, 561, 571, 581 of the interior joining vertical stile side upper corner block 55, the interior joining vertical stile side lower corner block 56, the door edge side stile side upper corner block 57, and the door edge side stile side lower corner block 58 are made of resin.

[0172] As shown in Figure 25, a heated foam material 556 is attached to the indoor-side X2 surface of the block main body 551 of the interior joining vertical stile-side upper corner block 55. At the upper side of the heated foam material 556, an indoor-side facing panel portion 5552 of the metal frame portion 555 is arranged on the indoor-side X2 surface of the heated foam material 556. A heated foam material 566 is attached to the indoor-side X2 surface of the block main body 561 of the interior joining vertical stile-side lower corner block 56. At the lower side of the heated foam material 566, an indoor-side facing panel portion 5652 of the metal frame portion 565 is arranged on the indoor-side X2 surface of the heated foam material 566.

[0173] As shown in Figure 26, a heat-foaming material 576 is attached to the outer left-right surface of the outer projection panel portion 5754 of the metal frame portion 575 of the door-leading-side stile-side upper corner block 57 so as to foam toward the outer periphery of the inner shoji screen 50. A heat-foaming material 586 is attached to the outer left-right surface of the outer projection panel portion 5854 of the metal frame portion 585 of the door-leading-side stile-side lower corner block 58 so as to foam toward the outer periphery of the inner shoji screen 50.

[0174] In the event of a fire, if the resin block main bodies 551, 561 melt due to the heat of the flames, the heated foaming materials 556, 566 foam toward the inner joining vertical stile 54, sealing the hollow portion of the inner joining vertical stile 54. In the event of a fire, if the resin block main bodies 571, 581 melt due to the heat of the flames, the heated foaming materials 576, 586 foam toward the frame body 30 located on the outer periphery of the inner shoji screen 50, sealing the gap between the inner shoji screen 50 and the frame body 30 at the melted portion of the resin block main bodies 571, 581, sealing the portion where the vertical stiles and horizontal stiles (upper and lower stiles) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening. This reduces the penetration of heat from the flames in the forward direction of the sliding window 1A, thereby improving fire resistance.

[0175] In addition, the heated foam materials 576, 586 are attached to the metal frame portions 575, 585. Therefore, in the event of a fire or the like, even if the resin block main bodies 571, 581 melt due to the heat of the flames, the metal frame portions 575, 585 do not melt, thereby reducing the risk of the heated foam materials 576, 586 falling from the door-edge-side stile-side upper corner block 57 and the door-edge-side stile-side lower corner block 58. As a result, even if the resin block main bodies 571, 581 melt due to the heat of the flames in the event of a fire or the like, the heated foam materials 576, 586 attached to the metal frame portions 575, 585 will foam toward the outer periphery of the inner shoji screen 50, sealing the gap between the inner shoji screen 50 and the frame body 30, sealing the portions where the vertical and horizontal frames (upper and lower frames) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening hole. This effectively reduces the penetration of heat from a fire in the forward direction of the sliding window 1A, thereby further improving fire resistance.

[0176] A first modified example of the second embodiment will be described. As shown in Fig. 27, the first modified example of the second embodiment differs from the mounting bracket 584 of the second embodiment in that the configuration of the mounting bracket 584A is different, and the position at which the heated foam material 587 is arranged is different. Note that in Fig. 27, the metal frame portion 585 of the lower corner block 58 on the door edge side stile side in Fig. 26 is not shown. In the first modified example of the second embodiment, the description of the second embodiment is used for the same configuration as the first embodiment.

[0177] 27 , in a first modification of the second embodiment, a metal mounting bracket 584A is L-shaped and has a vertically extending plate 5841 that is thick in the left-right direction and wide in the projection direction and extends in the up-down direction, and a bottom plate 5842 that protrudes horizontally inward in the left-right direction from the lower end of the vertically extending plate 5841. A heat-foaming material 587 is attached to the lower surface of the bottom plate 5842.

[0178] In a first variation of the second embodiment, the heated foaming material 587 is attached to the underside of the bottom panel 5842 of the metal mounting bracket 584A so as to foam toward the outer periphery of the inner shoji screen 50. In the event of a fire, if the resin block main body 581A melts due to the heat of the flames, the heated foaming material 587 foams toward the frame 30 located on the outer periphery of the inner shoji screen 50, sealing the gap between the inner shoji screen 50 and the frame 30 at the melted portion of the resin block main body 581A, sealing the portion where the vertical and horizontal stiles (upper and lower stiles) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening. This reduces the penetration of heat from the flame in the forward direction of the sliding window 1A. This improves fire resistance.

[0179] Furthermore, because the mounting bracket 584A (metal portion) is made of metal, even if the resin block body 581A melts due to the heat of the flames in the event of a fire, the metal mounting bracket 584A does not melt, reducing the risk of the heated foam material 587 falling from the lower corner block 58 on the door edge side of the stile. As a result, even if the resin block body 581A melts due to the heat of the flames in the event of a fire, the heated foam material 587 attached to the metal mounting bracket 584A will foam toward the outer periphery of the inner shoji screen 50, sealing the gap between the inner shoji screen 50 and the frame 30, sealing the areas where the vertical and horizontal stiles (upper and lower stiles) are not positioned and penetrate in the forward direction, and sealing each screw hole and opening. This effectively reduces the penetration of heat from the flames in the forward direction of the sliding window 1A. This improves fire resistance.

[0180] The method of attaching the heated foam materials 556, 566, 576, 586, 587 to the corner blocks 55 to 58, 58A is not limited, and the heated foam materials 556, 566, 576, 586, 587 may be attached, for example, by sticking them to the corner blocks 55 to 58, 58A, or by providing an arrangement groove in the corner blocks 55 to 58, 58A and inserting the materials into the arrangement groove, or by providing an arrangement space in the corner blocks 55 to 58, 58A and inserting the materials into the arrangement space.

[0181] Next, we will explain the mounting structure of the two door rollers 62 attached to the lower end of the inner shoji screen 50. As shown in Fig. 24, two door rollers 62 are attached to both left and right end sides of the bottom frame 52 of the inner shoji screen 50. The door rollers 62 are attached to the bottom frame 52 of the inner shoji screen 50 via mounting parts 65, as shown in Fig. 28.

[0182] 28 and 29, the door roller 62 is disposed inside a downward-opening frame portion 521 formed at the bottom of the bottom stile 52. The downward-opening frame portion 521 is formed in a U-shaped frame that opens downward. The downward-opening frame portion 521 has an upper surface plate 5211 formed in the shape of a horizontal plate that has a width in the front direction and extends in the left-right direction, and a pair of downward extending plates 5212 that extend downward from both ends of the upper surface plate 5211 in the front direction and are disposed opposite each other.

[0183] 29, on the inner surface of the lower end side of each of the pair of downward extending plates 5212, there are formed a pair of first grooves 5213 formed at the lower ends of the pair of downward extending plates 5212, extending in the left-right direction and opening toward the inside of the pair of downward extending plates 5212, and a pair of second grooves 5214 formed above the pair of first grooves, extending in the left-right direction and opening toward the inside of the pair of downward extending plates 5212. A pair of protrusions 651 formed at both ends of the mounting part 65 in the width direction (projection direction) are inserted into the pair of second grooves 524, and the mounting part 65 is mounted.

[0184] The mounting part 65 is formed in the shape of a rectangular frame with a rectangular opening penetrating in the vertical direction. The mounting part 65 is arranged parallel to the horizontal direction, has a predetermined thickness in the vertical direction, has a width in the projection direction, and extends in the left-right direction.

[0185] As shown in Figure 29, the mounting part 65 has a pair of protrusions 651 formed at both ends in the projection direction and protruding outward in both width directions (projection direction), a pair of locking recesses 652 formed on the edges of the opening on both sides in the projection direction on one side in the left-right direction, sandwiching the opening, and a pair of fitting portions 653 formed on the edges of the opening on both sides in the projection direction, sandwiching the opening, midway in the left-right direction.

[0186] When the mounting part 65 is inserted from one of the left-right sides of the pair of second grooves 5214, the pair of protrusions 651 are inserted into the pair of second grooves 5214 formed on the inner surfaces of the pair of downward extension plates 5212 of the bottom frame 52. As a result, the mounting part 65 is inserted into the bottom frame 52 from the longitudinal end of the bottom frame 52 and attached to the bottom frame 52.

[0187] As shown in Fig. 28, the door roller 62 is fixed by fitting to an attachment part 65 attached to the bottom frame 52. As shown in Fig. 29, the door roller 62 has a door roller holding frame 63 and one wheel 64 fixed to the door roller holding frame 63. The door roller holding frame 63 has a pair of locking pieces 631 formed on the lower end side on one side in the left-right direction and locked into a pair of locking recesses 652 of the attachment part 65, a pair of claw parts 632 formed on the lower end side on the other side in the left-right direction and locked into a pair of fitting parts 653 of the attachment part 65, and an upper protrusion 633 (protrusion, positioning protrusion) formed to protrude upward from the upper surface.

[0188] 24, when the door roller 62 is fixed to the attachment part 65 attached to the lower frame 52, the upper protrusion 633 is arranged in a through-hole 5211a (positioning part, positioning hole) formed in the upper surface plate 5211 of the lower open frame part 521 of the lower frame 52. In this embodiment, the upper protrusion 633 is arranged by being inserted into the through-hole 5211a formed in the upper surface plate 5211 of the lower open frame part 521 of the lower frame 52. As shown in FIGS. 24 and 29, when the door roller 62 is fixed to the attachment part 65, the upper protrusion 633 is inserted into the through-hole 5211a formed in the upper surface plate 5211 of the lower open frame part 521 of the lower frame 52 to position the position of the lower frame 52 in the left-right direction (longitudinal direction), and restricts the left-right movement of the door roller 62 so that the door roller 62 does not move in the left-right direction.

[0189] In this embodiment, the positioning of the door roller 62 in the left-right direction (longitudinal direction) of the bottom frame 52 is configured by arranging the upper protrusion 633 (protrusion) of the door roller 62 in the through-hole 5211a (positioning portion) of the bottom frame 52, but is not limited to this. For example, the bottom frame 52 may have multiple protrusions (positioning portions), and the protrusions of the door roller 62 may be arranged between adjacent protrusions of the multiple protrusions, so that the protrusions of the door roller 62 are hooked onto the protrusions of the bottom frame 52 to be positioned, or the bottom frame 52 may have one protrusion (positioning portion), the door roller 62 has multiple protrusions, and the protrusions of the door roller 62 are arranged between adjacent protrusions of the multiple protrusions of the door roller 62, so that the protrusions of the door roller 62 are hooked onto the protrusions of the bottom frame 52 to be positioned.

[0190] 29, two drainage holes, that is, through hole 5211a and through hole 5211b, are formed in the upper surface plate 5211 of the lower open frame portion 521 of the lower frame 52, and through hole 5211a is one of the two drainage holes formed in the lower frame 52. In this embodiment, the through hole 5211a that restricts the left-right movement of the upper protrusion 633 of the door roller holding frame 63 of the door roller 62 is one of the two drainage holes, that is, through hole 5211a and through hole 5211b, formed in the lower frame 52.

[0191] Therefore, without providing a new through hole 5211a for restricting the left-right movement of the upper protrusion 633 of the door roller 62, the through hole 5211a, which is a drainage hole, can be used to restrict the left-right movement of the upper protrusion 633 of the door roller holding frame 63 of the door roller 62. When water flows into the door roller 62 from the through hole 5211a, a path is formed in the door roller 62 through which the water flows downward from an opening formed in the upper surface of the door roller holding frame 63 through the inside of the door roller 62. As a result, when water flows into the door roller 62 from the through hole 5211a, the water can be allowed to flow into the lower frame 32 of the frame body 30.

[0192] When attaching the door roller 62 to the lower frame 52, first, as shown in Fig. 29, the attachment part 65 is inserted from one end in the left-right direction of the lower open frame portion 521 of the lower frame 52, and the attachment part 65 is attached to the lower frame 52. In this case, a pair of protrusions 651 formed on both ends of the attachment part 65 in the width direction (projection direction) is inserted into a pair of second groove portions 5214 of the lower frame 52, and the attachment part 65 is slid inward in the left-right direction of the lower frame 52.

[0193] Next, the door roller 62 is attached to the mounting part 65 attached to the bottom frame 52. In this case, the door roller 62 is moved from the lower side of the mounting part 65 toward the mounting part 65, and the pair of locking pieces 631 of the door roller 62 is locked into the pair of locking recesses 652 of the mounting part 65, and the pair of claws 632 is fitted into the pair of fitting parts 653 of the mounting part 65, thereby fitting and fixing the door roller 62 to the mounting part 65 attached to the bottom frame 52.

[0194] Here, when the door roller 62 is attached to the attachment part 65 attached to the bottom frame 52, the upper protrusion 633 of the door roller 62 is inserted into the through-hole 5211a formed in the top plate 5211 of the lower open frame part 521 of the bottom frame 52, as shown in Fig. 24. The upper protrusion 633 is inserted into the through-hole 5211a formed in the top plate 5211 of the lower open frame part 521 of the bottom frame 52, thereby restricting the left-right movement of the door roller 62 so that the door roller 62 does not move in the left-right direction. The through-hole 5211a is a drainage hole in the bottom frame 52.

[0195] As described above, when attaching the door roller 62 to the bottom frame 52, the door roller 62 can be easily attached to the bottom frame 52 by simply attaching the attachment part 65 to the bottom frame 52 and then fitting and fixing the door roller 62 to the attachment part 65 attached to the bottom frame 52. Because the door roller 62 can be attached to the bottom frame 52 using the attachment part 65, no additional processing is required on the bottom frame 52 to attach the door roller 62. Furthermore, because the door roller 62 is fitted and fixed to the attachment part 65, no fastening members such as screws are required.

[0196] In this embodiment, the door roller 62 is configured to have one wheel 64, but is not limited to this. As shown in Figures 30 and 31, the door roller 62A may be configured to have two double wheels 64. In this case, as in the case of attaching the door roller 62 having one wheel 64 to the bottom frame 52 described above, as shown in Figures 30 and 31, the attachment part 65 is attached to the bottom frame 52 by inserting it into the bottom frame 52, and then the door roller 62A is fitted and fixed to the attachment part 65 attached to the bottom frame 52, so that the door roller 62 can be easily attached to the bottom frame 52.

[0197] When attaching the door roller 62A to the mounting part 65, the door roller 62A is moved from the lower side of the mounting part 65 attached to the bottom frame 52 toward the mounting part 65, and the pair of locking pieces 634 of the door roller holding frame 63 of the door roller 62A are engaged with the pair of locking portions 654 (see Figure 31) of the mounting part 65, and the pair of claw portions 635 are engaged with the pair of fitting portions 655 (see Figure 31) of the mounting part 65.

[0198] When the door roller 62A is attached to the attachment part 65 attached to the bottom frame 52, the upper protrusion 636 of the door roller holding frame 63 of the door roller 62A is inserted into the through-hole 5211b (see FIG. 31) formed in the top plate 5211 of the lower open frame part 521 of the bottom frame 52. As a result, the upper protrusion 636 of the door roller holding frame 63 of the door roller 62A is inserted into the through-hole 5211b formed in the top plate 5211 of the lower open frame part 521 of the bottom frame 52, thereby restricting the left-right movement of the door roller 62A so that the door roller 62A does not move in the left-right direction.

[0199] A third embodiment will be described. In the third embodiment, an embodiment of an inner shoji screen 70 that is used in place of the inner shoji screen 50 of the second embodiment will be described. In the description of the third embodiment, the same content as in the second embodiment may be omitted.

[0200] As shown in Figure 32, the inner shoji screen 70 (shōji screen) of the third embodiment is constructed by fitting glass 701 made of two glass plates inside a frame body 700 constructed by assembling an upper frame 71 (horizontal member), a lower frame 72 (horizontal member), a front-end vertical frame 73 (vertical member) located on the front door side, and an inner joining vertical frame 74 (vertical member) located on the rear door side into a rectangular frame assembly. Two door rollers 62 (see Figure 37) are provided on the lower frame 72 of the inner shoji screen 70.

[0201] As shown in Figures 32 to 37, the four corner portions of the frame body 700 of the inner shoji screen 70 are provided with an upper corner block 75 (corner block) on the inner joining vertical frame side, a lower corner block 76 (corner block) on the inner joining vertical frame side, an upper corner block 77 (corner block) on the door edge side frame side, and a lower corner block 78 (corner block) on the door edge side frame side.

[0202] As shown in Figures 32 to 35 and 37, the inner joining vertical stile side upper corner block 75 is provided between the inner joining vertical stile 74 and the upper stile 71 at the corner where the inner joining vertical stile 74 and the upper stile 71 are combined, and connects the inner joining vertical stile 74 and the upper stile 71. The inner joining vertical stile side upper corner block 75 is arranged such that the lower insertion portion 753 (see Figures 35 and 38) is inserted into the end of the inner joining vertical stile 74 from the fore-end face of the upper end of the inner joining vertical stile 74 in the longitudinal direction, and the side face is arranged facing the fore-end face of the end of the upper stile 71 on the inner joining vertical stile 74 side in the longitudinal direction.

[0203] 32 to 34, 36, and 37, the inner joining vertical stile side lower corner block 76 is provided between the inner joining vertical stile 74 and the lower stile 72 at the corner where the inner joining vertical stile 74 and the lower stile 72 are combined, and connects the inner joining vertical stile 74 and the lower stile 72. The inner joining vertical stile side lower corner block 76 is arranged such that the upper insertion portion 763 (see FIGS. 36 and 38) is inserted into the end of the inner joining vertical stile 74 from the fore-end face of the lower end of the inner joining vertical stile 74 in the longitudinal direction, and the side face is arranged facing the fore-end face of the end of the lower stile 72 on the inner joining vertical stile 74 side in the longitudinal direction.

[0204] As shown in Figures 32 to 35 and 37, the leading-side stile upper corner block 77 is provided between the leading-side stile 73 and the upper stile 71 at the corner where the leading-side stile 73 and the upper stile 71 are combined, and connects the leading-side stile 73 and the upper stile 71. The leading-side stile upper corner block 77 is arranged so that its lower insertion portion 773 (see Figures 35 and 39) is inserted into the end of the leading-side stile 73 from the edge of the upper end of the leading-side stile 73 in the longitudinal direction, and its side surface is arranged facing the edge of the end of the upper stile 71 on the leading-side stile 73 side in the longitudinal direction.

[0205] As shown in Figures 32 to 34, 36 and 37, the lower corner block 78 on the leading edge side stile is provided between the leading edge side stile 73 and the bottom stile 72 at the corner where the leading edge side stile 73 and the bottom stile 72 are combined, and connects the leading edge side stile 73 and the bottom stile 72. The lower corner block 78 on the leading edge side stile is positioned such that its upper insertion portion 783 (see Figures 36 and 39) is inserted into the end of the leading edge side stile 73 from the edge of the lower longitudinal end of the leading edge side stile 73, and its side surface is positioned facing the edge of the end of the bottom stile 72 on the leading edge side stile 73 side in the longitudinal direction.

[0206] At the four corners of the frame 500, the upper and lower frames 71 and 72 are each formed by simply cutting the longitudinal ends in a direction perpendicular to the longitudinal direction, as shown in Figure 34, with no additional cutouts made, and are formed in a so-called raw cutout state. On the other hand, unlike the second embodiment, the door end vertical frame 73 and the interior joining vertical frame 74 each have a cutout formed at their longitudinal ends, cutting out a portion of the interior side X2, as shown in Figures 38 and 39. The cutouts formed at the longitudinal ends of the door end vertical frame 53 and the interior joining vertical frame 54 are simple cutouts formed by simply cutting out only a portion of the interior side X2 in a direction perpendicular to the longitudinal direction.

[0207] 32 and 35, when the inner joining vertical frame side upper corner block 75 is installed between the upper frame 71 and the inner joining vertical frame 74, as shown in Fig. 35, the end 710a of the upper frame 71 on the inner joining vertical frame 74 side in the longitudinal direction is swallowed into the glass arrangement groove 740 (swallowing portion, glass groove) in which the glass 701 of the inner joining vertical frame 74 is swallowed and arranged, and is arranged near the bottom 740a of the glass arrangement groove 740 of the inner joining vertical frame 74. The end 710a of the upper frame 71 on the inner joining vertical frame 74 side in the longitudinal direction is arranged in contact with the visible surface of the bottom 740a of the glass arrangement groove 740 of the inner joining vertical frame 74. In this state, as shown in Figures 33 and 35, an overlapping portion 70a is formed where parts of the upper frame 71 and the inner joining vertical frame 74 overlap when viewed from the front side.

[0208] 32 and 36, when the lower corner block 76 on the inner joining vertical frame side is provided between the lower frame 72 and the inner joining vertical frame 74, as shown in FIG. 36, the end 720a on the inner joining vertical frame 74 side in the longitudinal direction of the lower frame 72 is swallowed into the glass arrangement groove 740 (swallowing portion, glass groove) in which the glass 701 in the inner joining vertical frame 74 is swallowed and arranged, and is arranged near the bottom 740a of the glass arrangement groove 740 of the inner joining vertical frame 74. The end 720a on the inner joining vertical frame 74 side in the longitudinal direction of the lower frame 72 is arranged in contact with the visible surface of the bottom 740a of the glass arrangement groove 740 of the inner joining vertical frame 74. In this state, as shown in Figures 32 and 36, an overlapping portion 70b is formed where parts of the lower frame 72 and the inner joining vertical frame 74 overlap when viewed from the front side.

[0209] 32 and 35, when the door-front-side stile-side upper corner block 77 is installed between the upper frame 71 and the door-front-side stile 73, as shown in Fig. 35, the end 710b of the upper frame 71 on the door-front-side stile 73 side in the longitudinal direction is swallowed into the glass arrangement groove 730 of the door-front-side stile 73 and is arranged near the bottom 730a of the glass arrangement groove 730 (swallowing portion, glass groove) into which the glass 701 in the door-front-side stile 73 is swallowed and arranged. The end 710b of the upper frame 71 on the door-front-side stile 73 side in the longitudinal direction is arranged in contact with the visible surface of the bottom 730a of the glass arrangement groove 730 of the door-front-side stile 73. In this state, as shown in Figures 33 and 35, an overlapping portion 70c is formed in which parts of the upper frame 71 and the door-end side vertical frame 73 overlap when viewed from the front side.

[0210] 32 and 36, when the door-front-side stile-side lower corner block 78 is installed between the stile 72 and the door-front-side vertical stile 73, as shown in FIG. 36, the longitudinal end 720b of the stile 72 is swallowed into the glass arrangement groove 730 (swallowing portion, glass groove) in which the glass 701 of the door-front-side vertical stile 73 is swallowed and arranged, and is arranged near the bottom 730a of the glass arrangement groove 730 of the door-front-side vertical stile 73. The longitudinal end 720b of the stile 72 is arranged in contact with the visible surface of the bottom 730a of the glass arrangement groove 730 of the door-front-side vertical stile 73. In this state, as shown in FIGS. 33 and 36, an overlapping portion 70d is formed in which parts of the stile 72 and the door-front-side vertical stile 73 overlap when viewed in the visible direction.

[0211] The upper corner block 75 on the inner joining vertical frame side and the upper corner block 77 on the door-end side frame side will be described. As shown in Figure 33, the upper corner block 75 on the inner joining vertical frame side is positioned closer to the outer periphery of the frame body 700 than the overlapping portion 70a where parts of the upper frame 71 and the inner joining vertical frame 74 overlap when viewed from the front. The upper corner block 77 on the door-end side frame side is positioned closer to the outer periphery of the frame body 700 than the overlapping portion 70c where parts of the upper frame 71 and the door-end side vertical frame 73 overlap when viewed from the front.

[0212] As shown in Figures 38 and 39, the upper corner block 75 on the inner join vertical stile side and the upper corner block 77 on the door-end side stile side are made of resin and have block main bodies 751, 771 (resin parts) that extend in the vertical direction. The upper corner block 75 on the inner join vertical stile side and the upper corner block 77 on the door-end side stile side are mainly composed of one member, the block main bodies 751, 771, which are made of resin.

[0213] When the upper corner block 75 on the inner joining vertical frame side and the upper corner block 77 on the door-front side frame side are installed, if the resin block main body parts 751, 771 are damaged, only the resin block main body parts 751, 771 can be removed from the inner joining vertical frame 74 and the door-front side vertical frame 73 by removing the appropriate screws, etc.

[0214] Cover members 750, 770 that cover the indoor side X2 portion of the small end surface of the upper end of the inner joining vertical frame 74 and the door-front side vertical frame 73 are attached to the cutout portions of the indoor side X2 of the inner joining vertical frame 74 and the door-front side vertical frame 73 on the upper side corner block 75 of the inner joining vertical frame side and the door-front side frame side upper corner block 77.

[0215] The block main body portions 751, 771 are configured to have upper constituent portions 752, 772 (exterior constituent portions) arranged at the top, and insertion portions 753, 773 arranged at the bottom.

[0216] The upper end sides of the upper constituent parts 752, 772 are arranged so as to be exposed to the outside. Cutout parts 7521, 7721 that serve as rail running grooves along which the indoor rail 312 of the upper frame 31 runs are formed at the upper ends of the upper constituent parts 752, 772. Because the block main bodies 751, 771 are made of resin, metallic noises can be prevented from being generated when the indoor rail 312 of the upper frame 31 runs along the cutout parts 7521, 7721.

[0217] The insertion portions 753, 773 are inserted into the interior of the ends of the inner joining vertical frame 74 and the door-front side vertical frame 73 from the small end faces of the longitudinal upper ends of the inner joining vertical frame 74 and the door-front side vertical frame 73.

[0218] The lower corner block 76 on the inner joining vertical frame side and the lower corner block 78 on the door-end side frame side will be described. As shown in Figure 33, the lower corner block 76 on the inner joining vertical frame side is positioned closer to the outer periphery of the frame body 700 than the overlapping portion 70b where parts of the lower frame 72 and the inner joining vertical frame 74 overlap when viewed in the forward direction. The lower corner block 78 on the door-end side frame side is positioned closer to the outer periphery of the frame body 700 than the overlapping portion 70d where parts of the lower frame 72 and the door-end side vertical frame 73 overlap when viewed in the forward direction.

[0219] 38 and 39, the lower corner block 76 on the inner stile side and the lower corner block 78 on the door-end stile side have resin block main bodies 761, 781 (resin portions) formed of a resin material and extending in the vertical direction. The lower corner block 76 on the inner stile side and the lower corner block 78 on the door-end stile side are each mainly composed of one member of the resin block main bodies 761, 781.

[0220] When the lower corner block 76 on the inner joining vertical frame side and the lower corner block 78 on the door-end side frame side are installed, if the resin block main body parts 761, 781 are damaged, only the resin block main body parts 761, 781 can be removed from the inner joining vertical frame 74 and the door-end side vertical frame 73 by removing the appropriate screws, etc.

[0221] Cover members 760, 780 that cover the indoor side X2 portion of the small end surface of the upper end of the inner joining vertical frame 74 and the door-front side vertical frame 73 are attached to the cutout portions of the indoor side X2 of the inner joining vertical frame 74 and the door-front side vertical frame 73 on the lower corner block 76 on the inner joining vertical frame side and the lower corner block 78 on the door-front side frame side.

[0222] The block main body portions 761, 781 are configured to have lower constituent portions 762, 782 (exterior constituent portions) arranged at the bottom, and insertion portions 763, 783 arranged at the top.

[0223] The lower end sides of the lower constituent parts 762, 782 are arranged so as to be exposed to the outside. Cutout parts 7621, 7821 that serve as rail running grooves along which the indoor rail 322 of the lower frame 32 runs are formed at the lower ends of the lower constituent parts 762, 782. Because the block main bodies 761, 781 are made of resin, metallic noises can be prevented from being generated when the indoor rail 322 of the lower frame 32 runs along the cutout parts 7621, 7821.

[0224] The insertion portions 763, 783 are inserted into the inside of the ends of the inner joining vertical frame 74 and the door-front side vertical frame 73 from the small end faces of the longitudinal lower ends of the inner joining vertical frame 74 and the door-front side vertical frame 73.

[0225] We will explain the procedure for assembling the inner joining vertical frame 74 and the upper frame 71 with the inner joining vertical frame side upper corner block 75 interposed between them, and the procedure for assembling the door end side vertical frame 73 and the upper frame 71 with the door end side frame side upper corner block 77 interposed between them.

[0226] First, as shown in Figures 38 and 39, the insertion portions 753, 773 of the block main body portions 751, 771 of the upper corner block 75 on the inner joining vertical frame side and the upper corner block 77 on the door-end side frame side are inserted and attached from the small end faces of the upper longitudinal ends of the inner joining vertical frame 74 and the door-end side vertical frame 73.

[0227] Then, screws 75a, 77a (fixing members) are moved from the outside to the inside in the left-right direction through the through holes 741a, 731a of the left-right outer plates 741, 731 of the inner joining vertical stile 74 and the door-front side vertical stile 73, and as shown in Figure 35, the screws 75a, 77a pass through the through holes 742a, 732a of the left-right inner plates 742, 732 and are fastened to the screw fastening portions 71a of the upper stile 71 for fixation. Here, a portion of the screws 75a, 77a is disposed inside the inner joining vertical stile-side upper corner block 75 and the door-front side stile-side upper corner block 77, and the screws 75a, 77a are disposed passing through the interior of the inner joining vertical stile-side upper corner block 75 and the door-front side stile-side upper corner block 77.

[0228] By inserting the screws 75a and 77a into the through holes 742a and 732a of the left-right inner plates 742 and 732 of the inner joining vertical frame 74 and the door-front vertical frame 73 and into the screw fastening portion 71a of the upper frame 71, the screws 75a and 77a fasten the inner joining vertical frame 74 and the upper frame 71, as well as fasten the door-front vertical frame 73 and the upper frame 71. As a result, the inner joining vertical frame 74, to which the inner joining vertical frame upper corner block 75 is attached, is fixed to the longitudinal end of the upper frame 71 on the inner joining vertical frame 74 side with screws 75a, and the door-end side vertical frame 73, to which the door-end side frame upper corner block 77 is attached, is fixed to the longitudinal end of the upper frame 71 on the door-end side vertical frame 73 side with screws 77a.

[0229] We will explain the procedure for assembling the inner joining vertical frame 74 and the bottom frame 72 with the inner joining vertical frame side lower corner block 76 interposed between them, and the procedure for assembling the door end side vertical frame 73 and the bottom frame 72 with the door end side frame side lower corner block 78 interposed between them.

[0230] First, as shown in Figures 38 and 39, the insertion portions 763, 783 of the block main body portions 761, 781 of the lower corner block 76 on the inner joining vertical frame side and the lower corner block 78 on the door-front frame side are inserted and attached from the small end faces of the lower longitudinal ends of the inner joining vertical frame 74 and the door-front vertical frame 73.

[0231] Then, screws 76a, 78a are moved from the outside to the inside in the left-right direction through the through holes 741b, 731b of the left-right outer plates 741, 731 of the inner joining vertical stile 74 and the door-front side vertical stile 73, and as shown in Figure 36, the screws 76a, 78a pass through the through holes 742b, 732b of the left-right inner plates 742, 732 and are fastened to the screw fastening portions 72a of the bottom stile 72 for fixation. Here, a portion of the screws 76a, 78a is disposed inside the inner joining vertical stile-side lower corner block 76 and the door-front side stile-side lower corner block 78, and the screws 76a, 78a are disposed passing through the interior of the inner joining vertical stile-side lower corner block 76 and the door-front side stile-side lower corner block 78.

[0232] By inserting the screws 76a, 78a into the through holes 742b, 732b of the left-right inner plates 742, 732 of the inner joining vertical frame 74 and the door-front vertical frame 73 and into the screw fastening portion 72a of the bottom frame 72, the screws 76a, 78a fasten the inner joining vertical frame 74 and the bottom frame 72, as well as fasten the door-front vertical frame 73 and the bottom frame 72. As a result, the inner joining vertical frame 74, to which the inner joining vertical frame side lower corner block 76 is attached, is fixed to the end of the bottom frame 72 on the inner joining vertical frame 74 side in the longitudinal direction with screws 76a, and the door end side vertical frame 73, to which the door end side stile side lower corner block 78 is attached, is fixed to the end of the bottom frame 72 on the door end side vertical frame 73 side in the longitudinal direction with screws 78a.

[0233] The inner shoji screen 70 constructed as described above comprises corner blocks 75-78 provided between the vertical frames 74, 73 and the horizontal frames (upper frame 71, lower frame 72) at the corners of the frame body 700, overlapping portions 70a-70d where portions of the vertical frames 73, 74 and the horizontal frames (upper frame 71, lower frame 72) overlap when viewed from the front, and screws 75a, 76a, 77a, 78a (fixing members) that fasten the vertical frames 74, 73 and the horizontal frames (upper frame 71, lower frame 72) and have at least portions disposed inside the corner blocks 75-78.

[0234] Therefore, by providing corner blocks 75-78 between the vertical frames 74, 73 and the horizontal frames (upper frame 71, lower frame 72), the corner portions of the frame body 700 of the inner shoji screen 70 can be formed simply by making simple cutouts on the longitudinal ends of the vertical frames 74, 73 and horizontal frames (upper frame 71, lower frame 72). This reduces the need for additional cutouts on the longitudinal ends of the shapes of the vertical frames 74, 73 and horizontal frames (upper frame 71, lower frame 72). Furthermore, with the ends of the horizontal frames (upper frame 71, lower frame 72) positioned near the bottoms 730a, 740a of the glass placement grooves 730, 740 of the vertical frames 73, 74, parts of the vertical frames 74, 73 and the horizontal frames (upper frame 71, lower frame 72) overlap when viewed from the front, thereby improving the strength of the corners of the frame 700. Furthermore, at least parts of the screws 75a, 76a, 77a, 78a are positioned inside the corner blocks 75-78, thereby improving the strength of the corners of the frame 700.

[0235] In the inner shoji screen 70, the corner blocks 75 to 78 have insertion portions 753 to 783 that are inserted into the longitudinal ends of the vertical frames 74, 73. Therefore, the corner blocks 75 to 78 of the inner shoji screen 70 can be easily attached to the longitudinal ends of the vertical frames 74, 73 in a positioned state.

[0236] Furthermore, in the inner shoji screen 70, the corner blocks 75 to 78 have cutouts 7521, 7621, 7721, and 7821 that serve as rail running grooves along which the rails of the frame body 300 (the indoor side rail 312 of the upper frame 31 and the indoor side rail 322 of the lower frame 32) run. This eliminates the need for additional processing on the longitudinal ends of the vertical frames 74 and 73 to provide the rail running grooves, and it is possible to provide rail running grooves along which the rails of the frame body 300 (the indoor side rail 312 of the upper frame 31 and the indoor side rail 322 of the lower frame 32) run without additional cutout processing on the vertical frames 74 and 73.

[0237] Furthermore, in the inner shoji screen 70, the corner blocks 75-78 are positioned more outer periphery than the overlapping portions 70a-70d. As a result, by simply performing a simple notch process on the longitudinal ends of the vertical stiles 74, 73, the corner blocks 75-78 can be provided on the outer periphery of the overlapping portions 70a-70d where parts of the vertical stiles 74, 73 and the horizontal stiles (upper stile 71, lower stile 72) overlap at the ends. Therefore, while the overlapping portions 70a-70d ensure the strength of the corners of the inner shoji screen 70, by providing the corner blocks 75-78 more outer periphery than the overlapping portions 70a-70d with less notch process on the longitudinal ends of the shapes of the vertical stiles 74, 73 and the horizontal stiles (upper stile 71, lower stile 72), the assembly rigidity can be improved.

[0238] In addition, in the inner shoji screen 70, the longitudinal ends of the horizontal frames (upper frame 71, lower frame 72) are inserted into the glass placement grooves 740, 730 of the vertical frames 74, 73, and the longitudinal ends of the horizontal frames (upper frame 71, lower frame 72) abut against the visible surfaces of the bottoms 740a, 730a of the glass placement grooves 740, 730 of the vertical frames 74, 73. This improves the assembly strength between the horizontal frames (upper frame 71, lower frame 72) and the horizontal frames (upper frame 71, lower frame 72).

[0239] This method of installing inner shoji screen 70 includes the steps of inserting insertion portions 753-783 of corner blocks 75-78 into the longitudinal ends of vertical frames 74, 73 and fixing vertical frames 74, 73 with corner blocks 75-78 attached to the longitudinal ends of horizontal frames (upper frame 71, lower frame 72) with screws 75a-78a. This allows corner blocks 75-78 to be easily installed between the vertical frames 74, 73 and the horizontal frames (upper frame 71, lower frame 72).

[0240] Next, we will explain the heated foam material 756 attached to the interior joining vertical stile-side upper corner block 75, the heated foam material 766 attached to the interior joining vertical stile-side lower corner block 76, and the heated foam materials 786, 787 attached to the door-edge stile-side lower corner block 78. Note that no heated foam material is attached to the door-edge stile-side upper corner block 77. As mentioned above, the block main bodies 751, 761, 771, 781 of the interior joining vertical stile-side upper corner block 75, the interior joining vertical stile-side lower corner block 76, the door-edge stile-side upper corner block 77, and the door-edge stile-side lower corner block 78 are made of resin.

[0241] 38, a hollow portion 7531 extending in the left-right direction is formed inside the insertion portion 753 of the block body portion 751 of the inner joining vertical stile-side upper corner block 75. A heated foam material 756 is attached to the upper surface of the inside of the hollow portion 7531.

[0242] A hollow frame portion 7631 having a rectangular cross section and extending vertically is formed in the insertion portion 763 of the block body portion 761 of the lower corner block 76 on the inner joining vertical stile side. A heated foam material 766 is attached to the inner surface of the indoor side plate portion 7631a on the indoor side X2 of the hollow frame portion 7631.

[0243] As shown in FIG. 39 , a hollow portion 7822 extending in the left-right direction is formed inside the interior side X2 of the lower structural portion 782 of the leading-edge frame-side lower corner block 78. A heat-foaming material 786 is attached inside the hollow portion 7822 so as to foam toward the outer periphery of the inner shoji screen 70. A hollow frame portion 7831 having a rectangular cross section and extending in the vertical direction is formed in the insertion portion 783 of the leading-edge frame-side lower corner block 78. A heat-foaming material 787 is attached to the lower part of the inner surface formed on the outer left-right side of the hollow frame portion 7831 so as to foam toward the outer periphery of the inner shoji screen 70. A metal lower frame (not shown) made of a metal material is positioned below the heat-foaming materials 786, 787, so the heat-foaming materials 786, 787 are positioned above the metal lower frame.

[0244] In the event of a fire or the like, if the resin block main body portions 751, 761 melt due to the heat of the flames, the heated foaming materials 756, 766 foam toward the inner joining vertical frame 74, sealing the hollow portion of the inner joining vertical frame 74. In the event of a fire or the like, the heated foaming materials 786, 787 foam toward the frame body (not shown) located on the outer periphery of the inner shoji screen 70 and toward the interior side X2. When the resin block main body portion 781 melts due to the heat of a fire, the heated foaming materials 786, 787 drop onto the bottom frame (not shown) and foam from the metal bottom frame located below the heated foaming materials 786, 787. This improves fire resistance.

[0245] The method of attaching the heated foam materials 756, 766, 786, and 787 to the corner blocks 75, 76, and 78 is not limited, and the heated foam materials 756, 766, 786, and 787 may be attached, for example, by sticking them to the corner blocks 75, 76, and 78, or by providing placement grooves in the corner blocks 75, 76, and 78 and inserting them into the placement grooves, or by providing placement spaces in the corner blocks 75, 76, and 78 and inserting them into the placement spaces.

[0246] Next, the fourth embodiment will be described. As shown in Figure 40, the fourth embodiment is an embodiment in which the fittings are applied to a multi-window window 1B. The multi-window window 1B of the fourth embodiment is constructed by connecting two window sections 80 side by side (horizontally) via a mullion 90. Both window sections 80 are fixed windows (fixed windows). The multi-window window has two window sections 80 arranged adjacent to each other in the left-right direction, and a mullion 90 arranged between the two window sections 80. The mullion 90 extends in the vertical direction.

[0247] As shown in FIG. 40, each window section 80 has a frame body 10 and glass 101 arranged within the frame body 10. The frame body 10 is composed of an upper frame 11, a lower frame 12, an inner vertical frame 13, and an outer vertical frame 14. In FIG. 40, the frame body 10 arranged to the right of the upright 90 has the same configuration as the frame body 10 of the first embodiment (see FIGS. 1 to 7), while the frame body 10 arranged to the left of the upright 90 has the same configuration as the frame body 10 of the first embodiment (see FIGS. 1 to 7) but flipped left and right. In the explanation of the fourth embodiment, the "hanging-side vertical frame 13" and the "door-end-side vertical frame 14" of the first embodiment will be read as the "inner vertical frame 13" and the "outer vertical frame 14."

[0248] Adjacent frame bodies 10 are each constructed by a rectangular frame consisting of an upper frame 11, a lower frame 12, and left and right vertical frames 13, 14. The upper frame 11 and lower frame 12 extend in the left-right direction. The inner vertical frame 13 and the outer vertical frame 14 extend in the up-down direction. The outer vertical frames 14 of adjacent frame bodies 10 are each positioned on both the left and right outside of the continuous window 1B. The inner vertical frames 13 of adjacent frame bodies 10 are each positioned on the inside of the continuous window 1B in the left-right direction, and are positioned opposite each other with the mullions 90 in between.

[0249] Adjacent frames 10 each have four corner blocks 15, 16, 17, and 18 provided at four corner portions. The configurations of the four corner blocks 15, 16, 17, and 18 are basically the same as the configurations of the corner blocks 15, 16, 17, and 18 in the first embodiment.

[0250] In each of adjacent frame bodies 10, the four corner blocks 15, 16, 17, 18 have, as in the first embodiment, design portions 151, 161, 171, 181 exposed to the outside and fixed portions 152, 162, 172, 182 fixed to the vertical frames 13, 14 and the horizontal frames (upper frame 11, lower frame 12), as shown in Fig. 41. The configurations of the four corner blocks 15, 16, 17, 18 are similar to those of the four corner blocks 15, 16, 17, 18 in the first embodiment, and therefore detailed description thereof will be omitted.

[0251] As shown in Figure 41, a mullion 90 is arranged between the inner vertical frames 13 of the frame bodies 10 adjacent to the two window sections 80. At the upper ends of the vertical frames 13, the mullion 90 is arranged between the corner blocks 15 provided at the upper ends of the adjacent vertical frames 13, as shown in Figure 42, and at the lower ends of the vertical frames 13, the mullion 90 is arranged between the corner blocks 16 provided at the lower ends of the adjacent vertical frames 13.

[0252] Next, we will explain the configuration around the two corner blocks 17 that are arranged on either side of the mullion 90 on the upper side of the mullion 90. Note that the configuration around the two corner blocks 18 that are arranged on either side of the mullion 90 on the lower side of the mullion 90 is similar to the configuration around the two corner blocks 17 that are arranged on either side of the mullion 90 on the upper side of the mullion 90, so we will not explain it here.

[0253] As shown in Figures 41 and 42, the upright 90 has a upright main body 91 that is formed to extend long in the vertical direction and extends in the forward direction, a connecting member 92 that is arranged on the indoor side of the upright main body 91 and extends in the vertical direction, and a cover material 93 that is attached to the connecting member 92, is arranged at the end on the indoor side X2, and extends in the vertical direction.

[0254] As shown in Figure 42, when the multi-window window 1B is viewed from above, the upright body 91 has a hollow portion 911 extending in the front direction, a pair of left and right protruding plates 912 extending outward in both the left and right directions from the end of the hollow portion 911 on the outside side X1, and a pair of L-shaped engagement pieces 913 protruding outward in the left and right directions from both left and right surfaces at the end of the hollow portion 911 on the inside side X2. Recesses 911a that are recessed inward in the left and right direction are formed on both outside left and right surfaces of the hollow portion 911 midway along the front direction of the hollow portion 911.

[0255] The pair of left and right protruding plates 912 are arranged in the vertical direction opposite the outdoor X1 surface of the corner blocks 15, 16 at the upper and lower ends where the corner blocks 15, 16 are arranged, and are arranged opposite the outdoor X1 surface of the inner vertical frame 13 at the part where the inner vertical frame 13 is arranged.

[0256] Airtight materials 912a extending in the vertical direction are attached to the indoor-side X2 surfaces of the pair of left-right protruding plates 912. The airtight materials 912a are pressed against the outdoor-side X1 surfaces of the corner blocks 15, 16 at the upper and lower ends where the corner blocks 15, 16 are arranged, and against the outdoor-side X1 surfaces of the inner vertical frames 13 where the inner vertical frames 13 are arranged.

[0257] The pair of L-shaped engagement pieces 913 are engaged with engagement pieces 119 formed on the indoor side X2 of the corner blocks 15, 16 at the upper and lower ends where the corner blocks 15, 16 are arranged, and are engaged with engagement pieces (not shown) formed on the indoor side X2 of the inner vertical frame 13 at the portion where the inner vertical frame 13 is arranged.

[0258] The lower end protruding plate 1524 of the fixing portion 152 of the corner block 15 arranged at the top of the inner vertical frame 13 located inside the frame body 10 of the adjacent window portion 80 is formed to protrude toward the adjacent window portion 80. The lower end protruding plate 1524 is arranged along the edge surface of the upper end in the longitudinal direction of the hanging side vertical frame 13. The lower end protruding plate 1524 is fixed to the screw fastening portion 13a on the edge surface of the upper end in the longitudinal direction of the hanging side vertical frame 13 by a pair of screws 15b arranged apart in the projection direction.

[0259] In the lower end protruding plates 1524 of the fixing parts 152 of adjacent corner blocks 15, two corners 152a are formed at both ends, on the outdoor side X1 and the indoor side X2, in the projected direction of the tip of the adjacent lower end protruding plates 1524 that protrude toward each other. The outline of the two corners 152a is formed in an arc shape. In adjacent lower end protruding plates 1524, the two corners 152a are arranged opposite each other in the left-right direction, with the mullion 90 in between.

[0260] Since the outer shapes of the two corners 152a on the outside X1 and inside X2 of the lower end protruding plates 1524 of the fixing parts 152 of adjacent corner blocks 15 are formed in an arc shape, when placing a mullion 90 between two window parts 80, even if the mullion 90 is placed between the lower end protruding plates 1524 of the fixing parts 152 of adjacent corner blocks 15, the two corners 152a of the lower end protruding plates 1524 can be prevented from interfering with the placement of the mullion 90 or damaging the mullion 90.

[0261] Although one embodiment of the present disclosure has been described above, the present disclosure can be modified as appropriate. [Explanation of symbols]

[0262] 20 Shoji screen, 21 Upper frame (horizontal member), 22 Lower frame (horizontal member), 23 Vertical frame (vertical member), 24 Vertical frame (vertical member), 25, 26, 27, 28 Corner block, 20a, 20b, 20c, 20d Overlapping portion, 25a, 26a, 27a, 28a Screw (fixing member), 100 Building frame, 110 Opening, 200 Frame, 251, 261 Block main body, 252, 262 Appearance component, 253, 263, 273, 283 Insertion portion, 255, 265 Reinforcement portion, 210a, 210b End of upper frame (end of horizontal member), 220a, 220b End of lower frame (end of horizontal member), 230, 240 Glass placement groove (swallowing portion, glass groove), 230a, 240a bottom, 30 frame body, 321, 322 indoor rail, 50 inner shoji (shōji), 51 upper frame (horizontal member), 52 lower frame (horizontal member), 53 vertical frame (vertical member), 54 vertical frame (vertical member), 55, 56, 57, 58 corner block, 50a, 50b, 50c, 50d overlapping portion, 55a, 56a, 57a, 58a screws (fixing member), 500 frame body, 551, 561, 571, 581 block body, 552, 572 upper component (exterior component), 562, 582 lower component (exterior component), 553, 563, 573, 583 Insertion portion, 555, 565, 575, 585 Metal frame portion (reinforcement portion), 5521, 5621, 5721, 5821 Cutout portion, 510a, 510b End of upper frame (end of horizontal member), 520a, 520b End of lower frame (end of horizontal member), 530, 540 Glass placement groove (swallow portion, glass groove), 530a, 540a Bottom portion, 70 Inner shoji (shōji), 71 Upper frame (horizontal member), 72 Lower frame (horizontal member), 73 Vertical frame (vertical member), 74 Vertical frame (vertical member), 75, 76, 77, 78 Corner block, 70a, 70b, 70c, 70d Overlapping portion, 75a, 76a, 77a, 78a Screws (fixing members), 700 frame, 751, 761, 771, 781 block body, 7521, 7621, 7721, 7721 notch, 710a, 710b upper frame end (horizontal member end), 720a, 720b lower frame end (horizontal member end), 730, 740 glass placement groove (swallow portion, glass groove), 730a, 740a bottom

Claims

1. A frame body having a pair of vertical members and a pair of horizontal members and configured by frame assembly; a corner block provided between the vertical member and the horizontal member at a corner portion of the frame; an overlapping portion in which parts of the vertical member and the horizontal member overlap when viewed in a forward direction, with an end portion of one of the horizontal member and the vertical member being positioned near the bottom of the glass groove of the other of the horizontal member and the vertical member; A shoji screen comprising: a fixing member that fastens the vertical member and the horizontal member and has at least a portion disposed inside the corner block.

2. The shoji screen according to claim 1, wherein the corner block has an insertion portion that is inserted into the vertical member from an end portion in the longitudinal direction of the vertical member.

3. The corner block of the shoji screen described in claim 1 has a block main body portion having an exterior component portion exposed to the outside and an insertion portion inserted into the vertical member, and a reinforcing portion attached to the block main body portion to reinforce the corner portion of the frame.

4. The shoji screen is slidably disposed within the frame body, The shoji screen according to any one of claims 1 to 3, wherein the corner block has a cutout portion that serves as a rail running groove along which the rail of the frame body runs.

5. The shoji screen according to any one of claims 1 to 3, wherein the corner blocks are arranged on the outer periphery side of the overlapping portion.

6. The longitudinal end of the horizontal member is disposed in a swallowing portion in which the glass of the vertical member is disposed, A shoji screen according to any one of claims 1 to 3, wherein the longitudinal ends of the horizontal members abut against the projecting surfaces of the bottoms of the swallowing portions of the vertical members.

7. a frame body fixed to an opening provided in a building skeleton; A fitting comprising a shoji screen according to any one of claims 1 to 3, which is placed within the frame body.

8. The method for installing a shoji screen according to any one of claims 1 to 3, a step of inserting and attaching the insertion portion of the corner block to the longitudinal end of the vertical member; and a step of fixing the vertical member with the corner block attached to the longitudinal end of the horizontal member using the fixing member.

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