Construction tool

Abstract

To provide a fitting capable of preventing a sash from getting off from a frame by arranging the sash to maintain engagement with the top frame.SOLUTION: The fitting includes: a frame that has an upper frame, a lower frame, and left and right vertical frames, and has grooves in the upper frame and lower frame; a sash that has a plane material inside the stile that has an upper crosspiece, a lower crosspiece, and left and right stiles, which is held by inserting the upper end and the lower end into the grooves on the upper frame and lower frame; a retaining member protruding toward the inside of the groove of the upper frame on the upper crosspiece of the sash to prevent the sash from getting off from the upper frame; and a rotation stopper that is placed on the upper frame of the sash to prevent the retaining member from rotating relative to the sash by coming in contact with the retaining member.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to fittings.

Background Art

[0002] Conventionally, there has been known a fitting in which the upper and lower portions of a shoji screen are stored and supported in a kendon manner in rail grooves provided in an upper frame and a lower frame, and the shoji screen is not supported by the left and right vertical frames (see, for example, Patent Document 1). In this fitting, in order to prevent the shoji screen from coming off the lower frame when the shoji screen floats upward due to vertical shaking during an earthquake, a detachment prevention member that protrudes toward the rail groove of the lower frame is provided at the fixing portion of the handle of the lower rail of the shoji screen.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventor further examined the cause of the shoji screen coming off the frame body other than when the shoji screen comes off the lower frame due to vertical shaking during an earthquake. As a result, it was found that when the frame of the shoji screen is thermally deformed and shrinks due to the weight of the facing material, or when the lower frame is bent due to poor construction of the frame body, etc., the shoji screen moves downward and the engagement between the shoji screen and the upper frame is released, and there is a risk that the shoji screen comes off the frame body. The detachment of the shoji screen due to thermal deformation of the shoji screen is particularly remarkable when the frame contains a resin material.

[0005] Therefore, the inventor has found a problem of preventing the shoji screen from coming off the frame body by maintaining the engagement state between the shoji screen and the upper frame.

Means for Solving the Problems

[0006] The fitting of the present disclosure includes a frame body having an upper frame, a lower frame, and left and right vertical frames, and having groove portions in the upper frame and the lower frame, a panel material inside a frame body having an upper rail, a lower rail, and left and right vertical rails, and a shoji screen whose upper end portion and lower end portion are inserted into the groove portions to be held by the upper frame and the lower frame, a detachment prevention member provided on the upper rail of the shoji screen so as to protrude toward the groove portion of the upper frame to prevent the shoji screen from coming off the upper frame, and a rotation prevention portion disposed on the upper rail of the shoji screen and contacting the detachment prevention member to prevent the rotation of the detachment prevention member with respect to the shoji screen.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the fitting of the present disclosure will be described in detail with reference to the drawings. This embodiment shows a FIX window 1 as a fitting. The FIX window 1 is a so-called fixed window and is attached inside a frame 101 provided along the inner periphery of a rectangular opening 100 of a building structure. The FIX window 1 does not open or close the opening 100 except when the shoji screen 3 is removed for cleaning or the like.

[0009] FIG. 1 is a front view of the FIX window 1 as viewed from the indoor side. In FIGS. 2, 3, 5, and 6, the X1 direction indicates the outdoor side of the FIX window 1, and the X2 direction indicates the indoor side of the FIX window 1. Other windows (not shown), such as FIX windows and sliding windows, may be further attached inside the frame 101 on the outdoor side of the FIX window 1. Thereby, a double window is constructed inside the frame 101, and the heat insulation and sound insulation properties are further improved. The FIX window 1 of the present embodiment can be retrofitted on the indoor side of an existing window (not shown).

[0010] The FIX window 1 includes a frame body 2 provided inside the frame 101, a shoji 3 housed inside the frame body 2, and a detachment prevention member 4. The frame body 2 is configured by framing an upper frame 21, a lower frame 22, and left and right vertical frames 23 and 24 in a rectangle. The shoji 3 is removably fitted inside the frame body 2. The detachment prevention member 4 prevents the shoji 3 from coming off the upper frame 21 and is attached to the indoor side surface of the upper end portion of the shoji 3.

[0011] The upper frame 21 of the frame body 2 is integrally extruded and formed of a resin material. The upper frame 21 has a first hollow portion 211 having a rectangular cross-section arranged on the outdoor side, a second hollow portion 212 having a rectangular cross-section arranged on the indoor side, and a flat plate-shaped substrate portion 213 connecting the upper end portions of the first hollow portion 211 and the second hollow portion 212. The first hollow portion 211, the second hollow portion 212, and the substrate portion 213 extend over the entire length of the upper frame 21 in the extending direction. In the present embodiment, the first hollow portion 211 and the second hollow portion 212 protrude downward from the substrate portion 213 at the same height, but they do not necessarily have to protrude at the same height.

[0012] The first hollow portion 211 and the second hollow portion 212 are arranged in parallel at a distance in the indoor-outdoor direction. As a result, a groove portion 214 extending over the entire length in the extending direction of the upper frame 21 is formed between the first hollow portion 211, the second hollow portion 212, and the substrate portion 213. The groove portion 214 opens downward and houses the upper end portion of the shoji 3. The substrate portion 213 constitutes the inner bottom surface of the groove portion 214. An end portion of the first hollow portion 211 is integrally provided with a sealing portion 215 that protrudes toward the indoor side and elastically contacts the outdoor-side surface of the shoji 3. An end portion of the second hollow portion 212 is integrally provided with a fin portion 216 that protrudes toward the outdoor side and elastically contacts the indoor-side surface of the shoji 3. The upper frame 21 is fixed to the upper inner surface of the frame 101 by a fixing screw SC1 that penetrates the substrate portion 213.

[0013] The lower frame 22 of the frame body 2 is integrally extrusion-molded from a resin material. The lower frame 22 includes a first hollow portion 221 having a hollow structure with a rectangular cross-section arranged on the outdoor side, a second hollow portion 222 having a hollow structure with a rectangular cross-section arranged on the indoor side, and a flat plate-shaped substrate portion 223 that connects the lower end portions of the first hollow portion 221 and the second hollow portion 222. The first hollow portion 221, the second hollow portion 222, and the substrate portion 223 extend over the entire length in the extending direction of the lower frame 22. The first hollow portion 221 and the second hollow portion 222 of the present embodiment protrude upward from the substrate portion 223 at the same height, but do not necessarily have to protrude at the same height.

[0014] The first hollow portion 221 and the second hollow portion 222 are arranged in parallel at a distance in the indoor-outdoor direction. As a result, a groove portion 224 extending over the entire length in the extending direction of the lower frame 22 is formed between the first hollow portion 221, the second hollow portion 222, and the substrate portion 223, similar to the upper frame 21. The groove portion 224 is open upward and accommodates the lower end portion of the shoji 3. The substrate portion 223 constitutes the inner bottom surface of the groove portion 224. An upper end portion of the first hollow portion 221 is integrally provided with a sealing portion 225 that protrudes toward the indoor side and elastically contacts the outdoor-side surface of the shoji 3. An upper end portion of the second hollow portion 222 is integrally provided with a fin portion 226 that protrudes toward the outdoor side and elastically contacts the indoor-side surface of the shoji 3. The lower frame 22 is fixed to the lower inner surface of the frame 101 by fixing screws SC2 that penetrate the substrate portion 223.

[0015] The vertical frames 23 and 24 of the frame body 2 are integrally extrusion-molded in a substantially L shape by a resin material, respectively. The vertical frames 23 and 24 extend vertically between the upper frame 21 and the lower frame 22. The vertical frames 23 and 24 include substrate portions 231 and 241 that extend with a predetermined width along the vertical direction of the frame 101, outdoor wall portions 232 and 242 that extend substantially at a right angle from the outdoor end portions of the substrate portions 231 and 241 toward the inside of the frame 101, and abutting piece portions 233 and 243 that extend substantially at a right angle from the inner end portions of the outdoor wall portions 232 and 242 toward the indoor side.

[0016] The abutting piece portions 233 and 243 are formed to be narrower in width than the substrate portions 231 and 241 so as to contact the outdoor-side surface of the shoji 3. Sealing members 234 and 244 made of soft rubber or the like that elastically contact the outdoor-side surface of the shoji 3 are provided at the tips of the abutting piece portions 233 and 243, respectively. The vertical frames 23 and 24 are fixed to the left and right side inner surfaces of the frame 101 by fixing screws SC3 and SC4 that penetrate the substrate portions 231 and 241, respectively.

[0017] The shoji 3 is configured by placing a face material 35 such as glass inside a frame body 30 formed by rectangularly framing an upper rail 31, a lower rail 32, and left and right vertical frames 33, 34. As shown in FIG. 2, the upper rail 31 and the lower rail 32 are each composed of a metal core material 311, 321, a resin cover material 312, 322 that covers the outside thereof, and resin upper cover materials 313 and lower cover materials 323 attached to the upper and lower end surfaces of the resin cover materials 312, 322. As shown in FIG. 3, the vertical frames 33, 34 are each composed of a metal core material 331, 341 and a resin cover material 332, 342 that covers the outside thereof.

[0018] As shown in FIG. 1, the shoji 3 has a vertical-lapping structure in which the upper rail 31 and the lower rail 32 are arranged between the left and right vertical frames 33, 34. Specifically, the left and right vertical frames 33, 34 extend over the entire length in the height direction of the shoji 3. The upper rail 31 and the lower rail 32 are arranged between the left and right vertical frames 33, 34 and connect the upper ends and the lower ends of the vertical frames 33, 34 to each other. A substantially U-shaped handle 36 is attached to the central portion of the indoor-side surface of the lower rail 32.

[0019] The shoji 3 is inserted in a kendon style from the indoor side into the groove portion 214 of the upper frame 21 and the groove portion 224 of the lower frame 22 as follows. First, the upper end portion of the shoji 3 is inserted deep into the groove portion 214 of the upper frame 21. Next, the lower end portion of the shoji 3 is aligned with the groove portion 224 of the lower frame 22. Thereafter, as the shoji 3 descends, the lower end portion of the shoji 3 is inserted into the groove portion 224 of the lower frame 22. As a result, the upper end portion and the lower end portion of the shoji 3 are respectively accommodated in the groove portions 214, 224, and the shoji 3 is fitted and held between the upper frame 21 and the lower frame 22. The left and right vertical frames 23, 24 only bring the sealing members 233a, 243a at the tips of the contact piece portions 233, 243 into contact with the outdoor-side surface of the shoji 3 and do not hold the shoji 3.

[0020] The depths of the groove portion 214 of the upper frame 21 and the groove portion 224 of the lower frame 22 are the same. However, as shown in FIG. 2, a plurality of resin liners 227 for supporting the lower end portion of the shoji 3 are provided at predetermined intervals inside the groove portion 224 of the lower frame 22. The liner 227 is formed in a block shape and has a height slightly lower than the heights of the first hollow portion 221 and the second hollow portion 222 of the lower frame 22. Therefore, the lower end surface of the shoji 3 accommodated in the groove portion 224 of the lower frame 22 is disposed at a position slightly lower than the upper end surfaces of the first hollow portion 221 and the second hollow portion 222 of the lower frame 22.

[0021] In this state, the upper end portion of the shoji 3 is engaged with the upper frame 21 while being maintained in a state of being accommodated in the groove portion 214 of the upper frame 21. The lower end portion of the shoji 3 is engaged with the lower frame 22 while being maintained in a state of being accommodated in the groove portion 224 of the lower frame 22. The sealing portion 215 and the fin portion 216 of the upper frame 21 are respectively in contact with the upper end portion of the shoji 3 from the outdoor side and the indoor side. Thereby, in the upper frame 21, prevention of rattling of the upper end portion of the shoji 3, prevention of intrusion of dust and the like from the outside, and ensuring of airtightness are achieved. The sealing portion 225 and the fin portion 226 of the lower frame 22 are respectively in contact with the lower end portion of the shoji 3 from the outdoor side and the indoor side. Thereby, in the lower frame 22, prevention of rattling of the lower end portion of the shoji 3, prevention of intrusion of dust and the like from the outside, and ensuring of airtightness are achieved.

[0022] The anti-disengagement member 4 is attached to the indoor side surface 31a of the upper rail 31 of the shoji 3. As shown in FIG. 1, the anti-disengagement member 4 of the present embodiment is disposed one by one at both the left and right end portions of the indoor side surface 31a of the upper rail 31. Only one of the two anti-disengagement members 4 provided on the surface 31a may be used. Since the two anti-disengagement members 4 have the same structure, hereinafter, the left anti-disengagement member 4 shown in FIG. 1 will be described with reference to FIGS. 4 to 6.

[0023] As shown in Fig. 4, the anti-disengagement member 4 is composed of a holding portion 41 which is a vertically long rectangular metal or resin case, and a locking tongue piece 42 made of a metal plate material housed inside the holding portion 41. The locking tongue piece 42 is formed in a long plate shape that is longer in the vertical direction than the holding portion 41. Approximately the lower half of the locking tongue piece 42 is inserted into the holding portion 41. Approximately the upper half of the locking tongue piece 42 protrudes from the holding portion 41 into the groove portion 214 of the upper frame 21 as shown in Figs. 5 and 6. The corner at the upper end of the locking tongue piece 42 protruding from the holding portion 41 is chamfered in an R shape.

[0024] In the center of the inner wall portion 41a of the holding portion 41 on the indoor side, a vertically long long hole 411 is formed. The long hole 411 integrally has a circular large-diameter portion 411a at the lower end. On the outer wall portion of the holding portion 41 opposite to the inner wall portion 41a on the indoor side, a vertically long long hole 412 overlapping the long hole 411 is formed. The long hole 412 does not have a large-diameter portion at the lower end.

[0025] In the locking tongue piece 42 inside the holding portion 41, a vertically long long hole 421 is also formed so as to overlap the long holes 411 and 412 of the holding portion 41. The long hole 421 of the locking tongue piece 42 has the same shape as the long hole 411 of the holding portion 41 and integrally has a circular large-diameter portion 421a at the lower end.

[0026] The holding portion 41 integrally has a protruding portion 413 protruding upward. The protruding portion 413 is disposed on the upper surface of the holding portion 41 on the indoor side surface 31a side of the upper crossbar 31 rather than the locking tongue piece 42. The protruding portion 413 has the same width as the left and right widths of the holding portion 41 and has a protruding height smaller than the protruding height of the locking tongue piece 42.

[0027] The anti-disengagement member 4 is attached to the upper rail 31 from the indoor side by one fixing screw 43. Specifically, the anti-disengagement member 4 is temporarily fixed to the indoor-side surface 31a of the upper rail 31 of the shoji 3 before being attached to the frame body 2 by the fixing screw 43. At this time, the shaft portion 431 of the fixing screw 43 is disposed on the upper end sides of the long holes 411, 412 of the holding portion 41 and the long hole 421 of the locking tongue piece 42. The head portion 432 of the fixing screw 43 is disposed on the surface of the indoor-side wall portion 41a of the holding portion 41. Therefore, the anti-disengagement member 4 is temporarily fixed at a position lower than the final attachment position.

[0028] After the shoji 3 is fitted into the frame body 2 in the Kendon style, the anti-disengagement member 4 is slid upward along the long holes 411, 412, 421 until the head portion 432 of the fixing screw 43 is positioned at the large-diameter portions 411a, 421a. As a result, the locking tongue piece 42 is inserted into the groove portion 214 of the upper frame 21 from the gap between the first hollow portion 212 of the upper frame 21 and the upper rail 31 of the shoji 3 as shown in FIG. 5. The upper end portion 42a of the locking tongue piece 42 in the groove portion 214 is disposed in proximity to the substrate portion 213 of the upper frame 21 with a very small gap left therebetween. The distance d1 between the upper end portion 42a of the locking tongue piece 42 and the substrate portion 213 is smaller than the distance d2 (see FIG. 2) at which the lower end portion of the shoji 3 is inserted into the groove portion 224 of the lower frame 22 and engages with the lower frame 22.

[0029] After the head portion 432 of the fixing screw 43 is positioned at the large-diameter portions 411a, 412a, the fixing screw 43 is tightened. As a result, the outdoor-side wall portion of the holding portion 41 is clamped between the head portion 432 of the fixing screw 43 and the upper rail 31 of the shoji 3, and the anti-disengagement member 4 is fixed to the upper rail 31. The shaft portion 431 of the fixing screw 43 penetrates through the resin cover material 312 of the upper rail 31 and is screwed into the metal core material 311. In a state where the anti-disengagement member 4 is fixed to the upper rail 31 by the fixing screw 43, the locking tongue piece 42 is held immovably within the holding portion 41.

[0030] The anti-disengagement member 4 is attached in contact with a stepped portion formed on the upper crosspiece 31 at the upper corners of the left and right ends of the upper crosspiece 31. Specifically, the thickness of the upper crosspiece 31 in the indoor-outdoor direction is slightly thicker than the thickness of the left and right vertical frames 33, 34 in the indoor-outdoor direction. Therefore, as shown in Fig. 6, first stepped portions 30a extending in the vertical direction are formed at the left and right ends of the indoor-side surface 31a of the upper crosspiece 31 due to the dimensional difference between the upper crosspiece 31 and the vertical frames 33, 34. The first stepped portions 30a are constituted by the inner end surfaces of the vertical frames 33, 34. The holding portions 41 are attached by bringing the side end surfaces 41b arranged on the left and right of the holding portions 41 and extending linearly in the vertical direction into contact with the first stepped portions 30a. Thereby, the first stepped portions 30a function as rotation stoppers that prevent the rotational movement of the anti-disengagement member 4 around the fixing screw 43. When the anti-disengagement member 4 is slid in the vertical direction, since the anti-disengagement member 4 is linearly guided along the first stepped portions 30a, the anti-disengagement member 4 can be easily positioned at a predetermined position without rotation.

[0031] As shown in Fig. 4, tapered portions 411b for guiding the head 432 of the fixing screw 43 into the large-diameter portion 411a of the long hole 411 are formed on both sides of the long hole 411 of the holding portion 41. Therefore, when tightening the fixing screw 43 after sliding the anti-disengagement member 4 upward, even if the positions of the head 432 of the fixing screw 43 and the large-diameter portion 411a are slightly misaligned, the head 432 can be guided into the large-diameter portion 411a along the tapered portion 411b.

[0032] The upper end cover material 313 attached to the upper end surface of the upper horizontal bar 31 of the shoji 3 has a dimension in the indoor-outdoor direction that is slightly larger than the dimension of the resin cover material 312 in the indoor-outdoor direction, and is attached so as to be externally fitted to the upper end surface of the resin cover material 312. Therefore, as shown in FIG. 5, on the frame body 30 of the shoji 3, a second stepped portion 30b extending in the lateral direction is formed between the end portion 313a of the upper end cover material 313 protruding inward of the room from the resin cover material 312 and the indoor-side surface 31a of the upper horizontal bar 31. When the anti-disengagement member 4 slides upward, the protruding portion 413 of the holding portion 41 abuts against the second stepped portion 30b. Thus, the second stepped portion 30b functions as another rotation stopper that prevents the rotation-direction movement of the anti-disengagement member 4 around the fixing screw 43. When the protruding portion 413 of the holding portion 41 abuts against the second stepped portion 30b, when the anti-disengagement member 4 is slid upward, the upper end position in the movement direction of the anti-disengagement member 4 is easily positioned.

[0033] Next, the operation of the FIX window 1 to which the anti-disengagement member 4 is attached to the upper part of the shoji 3 will be described.

[0034] The locking tongue piece 42 of the anti-disengagement member 4 is inserted into the groove portion 214 of the upper frame 21 from the upper horizontal bar 31 of the shoji 3 and is disposed close to the substrate portion 213 of the upper frame 21. In this state, for example, even if the frame body 30 of the shoji 3 shrinks due to thermal deformation or the lower frame 21 bends due to poor construction of the frame body 2 and the shoji 3 moves downward, the locking tongue piece 42 of the anti-disengagement member 4 remains inserted into the groove portion 214 of the upper frame 21. Therefore, the engagement between the shoji 3 and the upper frame 21 is not released, and the detachment of the shoji 3 from the frame body 2 is prevented. Even if the shoji 3 moves upward due to vertical shaking such as an earthquake, the upper end portion 42a of the locking tongue piece 42 of the anti-disengagement member 4 abuts against the substrate portion 213 of the upper frame 21, and the upward movement of the shoji 3 is restricted. At this time, since d1 < d2, the shoji 3 does not come off from the lower frame 22.

[0035] The rotation prevention member 4 is prevented from rotating with respect to the shoji 3 by the contact between the side end face 41b of the holding portion 41 and the first step portion 30a of the frame body 30, and the contact between the protruding portion 413 of the holding portion 41 and the second step portion 30b of the frame body 30. Therefore, for example, even if the fixing screw 43 loosens due to long-term use, the rotation prevention member 4 will not be displaced in the rotational direction with respect to the shoji 3 and cause rattling.

[0036] Since the first step portion 30a and the second step portion 30b with which the rotation prevention member 4 comes into contact extend in two directions that are substantially orthogonal to each other, the movement of the rotation prevention member 4 in the rotational direction can be more reliably prevented. Moreover, by the rotation prevention member 4 coming into contact with these first step portion 30a and second step portion 30b, the position of the rotation prevention member 4 with respect to the upper rail 31 of the shoji 3 can be easily positioned at a predetermined position. The rotation stopping portion that comes into contact with the rotation prevention member 4 may be only one of the first step portion 30a and the second step portion 30b.

[0037] As described above, according to the FIX window 1 of the present embodiment, the following effects can be obtained. That is, the FIX window 1 of the present embodiment includes a frame body 2 having an upper frame 21, a lower frame 22, and left and right vertical frames 23, 24, and having groove portions 214, 224 in the upper frame 21 and the lower frame 22, a sash 3 having a top rail 31, a bottom rail 32, and left and right vertical rails 33, 34, with a facing material 35 inside a frame body 30 of the sash 3, and the sash 3 is held by the upper frame 21 and the lower frame 22 by inserting upper and lower end portions into the groove portions 214, 224, a detachment prevention member 4 provided to protrude into the groove portion 214 of the upper frame 21 on the top rail 31 of the sash 3 to prevent the sash 3 from coming off the upper frame 21, and a rotation prevention portion arranged on the top rail 31 of the sash 3 and preventing the rotation of the detachment prevention member 4 with respect to the sash 3 by contacting the detachment prevention member 4. According to this, even if the frame body 30 of the sash 3 shrinks due to thermal deformation or the lower frame 21 bends due to poor construction of the frame body 2 and the sash 3 moves downward, the engagement state between the sash 3 and the upper frame 21 can be maintained by the detachment prevention member 4. Therefore, the sash 3 is prevented from coming off the frame body 2. Moreover, since the rotation of the detachment prevention member 4 with respect to the sash 3 is prevented by the contact with the rotation prevention portion arranged on the top rail 31 of the sash 3, the detachment prevention member 4 does not shift in the rotational direction with respect to the sash 3 and cause rattling.

[0038] The rotation prevention portion may be a first stepped portion 30a arranged at the left and right end portions of the top rail 31 and extending in the vertical direction. According to this, in addition to being able to prevent the movement of the detachment prevention member 4 in the rotational direction, when sliding in the vertical direction, the detachment prevention member 4 can be linearly guided along the first stepped portion 30a. Therefore, the detachment prevention member 4 can be easily positioned at a predetermined position without rotating.

[0039] The rotation prevention portion may be a second stepped portion 30b arranged at the upper end portion of the top rail 31 and extending in the horizontal direction. According to this, in addition to being able to prevent the movement of the detachment prevention member 4 in the rotational direction, when the protruding portion 413 of the holding portion 41 abuts against the second stepped portion 30b, the upper end position in the moving direction of the detachment prevention member 4 can be easily positioned when the detachment prevention member 4 is slid upward.

[0040] The upper frame 21, the lower frame 22, the upper cross member 31, and the lower cross member 32 each contain a resin material. According to this, in addition to the effect that the shoji 3 does not come off from the frame body 2, the FIX window 1 is excellent in heat insulation and dew prevention properties.

[0041] Although not shown, the rotation stopper that contacts the detachment prevention member 4 and prevents its movement in the rotation direction may be constituted by a convex portion that protrudes from the indoor side surface 31a of the upper cross member 31 toward the indoor side. Although not shown, the rotation stopper may be constituted by a concave portion that can accommodate a convex portion provided on the detachment prevention member 4.

Explanation of reference numerals

[0042] 1 FIX window, 2 frame body, 21 upper frame, 22 lower frame, 214, 224 groove portions, 23, 24 vertical frames, 3 shoji, 30 frame, 30a first step portion (rotation stopper), 30b second step portion (rotation stopper), 31 upper cross member, 32 lower cross member, 312, 322 resin cover materials, 33, 34 vertical frames, 35 facing material, 4 detachment prevention member

Claims

1. a frame body having an upper frame, a lower frame, and left and right vertical frames, and having groove portions in the upper frame and the lower frame; a shoji having a facing material on the inner peripheral side of a frame body having an upper rail, a lower rail, and left and right vertical frames, and the upper end portion and the lower end portion thereof being inserted into the groove portions to be held by the upper frame and the lower frame; a detachment prevention member provided on the upper rail of the shoji so as to protrude into the groove portion of the upper frame to prevent the shoji from coming off the upper frame; a rotation prevention portion disposed on the upper rail of the shoji and contacting the detachment prevention member to prevent the detachment prevention member from rotating with respect to the shoji; and the rotation prevention portion includes a first stepped portion formed by a difference in thickness in the indoor-outdoor direction between the upper rail and the vertical frame and extending in the vertical direction between the upper rail and the vertical frame, a fitting.

2. The fitting according to claim 1, wherein the rotation prevention portion is disposed at an upper end portion of the upper rail and includes a second stepped portion extending in the lateral direction.

3. The fitting according to claim 1 or 2, wherein the upper frame and the lower frame and the upper rail and the lower rail each contain a resin material.

Images