JP2023082757A - Fitting - Google Patents

Abstract

To provide a fitting capable of preventing a sash from coming off out of a frame body by maintaining engagement of the sash and an upper frame even when the sash moves downward or the position of an upper crosspiece of the sash is lowered.SOLUTION: A fitting includes: a frame body having an upper frame, a lower frame, and left and right vertical frames, in which the upper frame and the lower frame have a groove respectively; a sash that has a plain member inside a housing including an upper crosspiece, a lower crosspiece, and left and right vertical housings, and that is held by the upper frame and the lower frame with an upper and a lower end inserted into the grooves respectively; and an upper retaining member that is provided to an upper end face of the sash protruding upward to prevent the sash from coming off out of the upper frame. The upper retaining member has a rib that extends along the length direction of the upper crosspiece, and protrudes upward to fit in a space between the upper end face of the sash and an inner bottom surface of the groove with the upper end of the sash inserted diagonally upward into the groove of the upper frame.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to fittings.

Conventionally, fittings that store and support the upper and lower parts of the shoji in the rail grooves provided in the upper frame and the lower frame in the Kendon style and do not support the shoji in the left and right vertical frames are known (for example, Patent Document 1 reference). In this fitting, in order to prevent the shoji from detaching from the lower frame when the shoji floats upward due to the pitching motion of an earthquake, the fixed part of the handle of the lower rail of the shoji is attached toward the rail groove of the lower frame. A protruding detent member is provided.

JP 2018-184709 A

The inventor further examined the cause of the shoji coming off from the frame other than the case where the shoji comes off from the lower frame due to pitching caused by an earthquake. As a result, when the lower frame bends due to poor construction of the frame, the shoji moves downward and the engagement between the shoji and the upper frame is released, and there is a risk that the shoji will come off the frame. found.

Furthermore, in general, a large amount of direct sunlight that irradiates the fittings from the outdoor side penetrates into the vicinity of the lower part of the fittings. In addition, when the lower rail is softened by the heat of direct sunlight, the lower rail may bend due to the weight of the face material such as glass contained in the shoji, deforming the shoji and reducing the vertical dimension of the shoji. If the vertical dimension of the shoji becomes smaller, the position of the upper rail of the shoji will be lowered, changing the engagement state between the shoji and the frame, which may cause the shoji to rattle or come off the frame. be.

Therefore, even if the shoji moves downward or the position of the upper rail of the shoji is lowered, the engagement state between the shoji and the upper frame can be maintained, thereby preventing the shoji from the frame body. We found a problem of preventing the detachment.

The fittings of the present disclosure include a frame body having an upper frame, a lower frame, and left and right vertical frames, and having grooves in the upper frame and the lower frame, respectively, and a frame body having an upper rail, a lower rail, and the left and right vertical frames. A shoji that has a face material on the inside and is held by the upper frame and the lower frame by inserting the upper end and the lower end into the groove, respectively; and an upper detachment preventing member for preventing the shoji from coming off the upper frame, the upper detachment preventing member extending along the length direction of the upper rail, and the upper end of the shoji The fixture has ribs that protrude upward so as to fit in the space between the upper end surface of the shoji and the inner bottom surface of the groove in a state of being inserted obliquely upward into the groove of the frame. .

It is the front view which looked at the fittings from the indoor side. FIG. 2 is a vertical cross-sectional view taken along line AA in FIG. 1; FIG. 2 is a cross-sectional view taken along line BB in FIG. 1; It is a perspective view which expands and shows the lower part of the indoor side of fittings. It is a perspective view which expand|deploys and shows the top detachment|prevention member of the upper end part of a shoji. It is a longitudinal cross-sectional view which shows a mode that a shoji is attached to a frame. 7 is an enlarged view of the upper frame of the fitting shown in FIG. 6. FIG. It is an enlarged view of the upper frame of the fittings which has an upper detachment|prevention member which concerns on other embodiment. It is a longitudinal cross-sectional view which shows a mode that the shoji shown in FIG. 8 is attached to a frame. It is a perspective view which expands and shows the upper end part of the shoji which has an upper detachment|prevention member which concerns on other embodiment.

Hereinafter, each embodiment of fittings of the present disclosure will be described in detail with reference to the drawings. The fixture in the embodiment shows the FIX window 1 . The FIX window 1 is a so-called fitted window, and is attached inside a frame 101 provided along the inner circumference of a rectangular opening 100 in the building frame. The FIX window 1 does not open or close the opening 100 except when the shoji 3 is removed for cleaning or the like.

FIG. 1 is a front view of the FIX window 1 as seen from the inside of the room. In the drawings shown below, 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. FIG. Other windows (not shown) such as a FIX window and a sliding window may be further attached inside the frame 101 on the outdoor side of the FIX window 1 . As a result, a double window is constructed inside the frame 101 to further improve heat and sound insulation. The FIX window 1 of this embodiment can be retrofitted to the interior side of an existing window (not shown).

A FIX window 1 has a frame 2 provided inside a frame 101, a shoji 3 housed inside the frame 2, a lower retaining member 4, and an upper retaining member 5. - 特許庁The frame body 2 is configured by forming an upper frame 21, a lower frame 22, and left and right vertical frames 23, 23 into a rectangular frame. The shoji 3 is detachably fitted inside the frame 2. - 特許庁Both the lower retaining member 4 and the upper retaining member 5 are members for preventing the shoji 3 from coming off the frame 2 .

An upper frame 21 of the frame body 2 is integrally extruded from a resin material. The upper frame 21 includes a first hollow portion 211 having a hollow structure with a rectangular cross section arranged on the outdoor side, a second hollow portion 212 having a hollow structure with a rectangular cross section arranged on the indoor side, and the first hollow portion 211. and a plate-like substrate portion 213 connecting the upper end portions of the second hollow portions 212 to each other. 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. The first hollow portion 211 and the second hollow portion 212 project downward from the substrate portion 213 at the same height.

The first hollow portion 211 and the second hollow portion 212 are arranged parallel to each other while being separated from each other in the indoor-outdoor direction. Thus, a groove portion 214 is formed between the first hollow portion 211 , the second hollow portion 212 and the base plate portion 213 over the entire length of the upper frame 21 in the extending direction. The groove 214 opens downward and accommodates the upper end of the shoji 3 . The substrate portion 213 constitutes the inner bottom surface of the groove portion 214 .

The lower end of the first hollow portion 211 is provided with a sealing portion 215 that protrudes toward the indoor side and elastically contacts the surface of the shoji 3 on the outdoor side. The lower end of the second hollow portion 212 is provided with a fin portion 216 that protrudes toward the outside of the room and elastically contacts the surface of the shoji 3 on the inside of the room. The upper frame 21 is fixed to the upper inner surface of the frame 101 by screws (not shown) penetrating the substrate portion 213 .

A lower frame 22 of the frame body 2 is integrally extruded 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 the first hollow portion 221. and a plate-like substrate portion 223 connecting the lower end portions of the second hollow portions 222 to each other. The first hollow portion 221 , the second hollow portion 222 and the substrate portion 223 extend over the entire length of the lower frame 22 in the extending direction. Although 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, they do not necessarily have to protrude at the same height.

The first hollow portion 221 and the second hollow portion 222 are arranged parallel to each other while being separated from each other in the indoor-outdoor direction. As a result, between the first hollow portion 221 , the second hollow portion 222 and the substrate portion 223 , a groove portion 224 is formed over the entire length of the lower frame 22 in the extending direction, similarly to the upper frame 21 . The groove 224 opens upward and accommodates the lower end of the shoji 3 . The substrate portion 223 constitutes the inner bottom surface of the groove portion 224 .

The 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 surface of the shoji 3 on the outdoor side. An upper end portion of the second hollow portion 222 is integrally provided with a fin portion 226 that protrudes toward the outside of the room and elastically contacts the surface of the shoji 3 on the inside of the room. The lower frame 22 is fixed to the lower inner surface of the frame 101 by screws (not shown) penetrating the base plate portion 223 .

As shown in FIG. 2, inside the groove 224 of the lower frame 22, a plurality of resin liners 227 for supporting the lower end of the shoji 3 are provided at predetermined intervals. The liner 227 is formed in a block shape and has a height slightly lower than the height 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 placed on the upper surface of the liner 227 so that the upper end surface of the first hollow portion 221 and the second hollow portion 222 of the lower frame 22 is lowered. is placed slightly lower.

The vertical frames 23, 23 of the frame 2 are integrally extruded into a substantially L-shape from a resin material. The vertical frames 23 , 23 extend vertically across the space between the upper frame 21 and the lower frame 22 . The vertical frames 23, 23 include substrate portions 231, 231 extending with a predetermined width along the vertical direction of the frame 101, and outdoor wall portions extending from the outdoor end portions of the substrate portions 231, 231 toward the inside of the frame 101 at a substantially right angle. 232, 232, and contact piece portions 233, 233 extending from the inner end portions of the exterior wall portions 232, 232 toward the interior side at substantially right angles.

The contact piece portions 233 and 233 are formed narrower than the substrate portions 231 and 241 so as to contact the surface of the shoji 3 on the outdoor side. Sealing portions 234 , 234 are integrally provided at the tips of the abutment pieces 233 , 233 , respectively, to elastically contact the surface of the shoji 3 on the outdoor side. The vertical frames 23, 23 are fixed to the inner surfaces of the left and right side portions of the frame 101 by screws (not shown) passing through the substrate portions 231, 231, respectively.

The shoji 3 has a frame 30 in which an upper rail 31, a lower rail 32, and left and right vertical frames 33, 33 are assembled in a rectangular frame. It is constructed by paying The face material may be double glazing consisting of two sheets of glass. In the case of double glazing, it is held by a holding member made of soft vinyl chloride provided on the frame.

As shown in FIG. 2, the upper rail 31 and the lower rail 32 are composed of metal core members 311 and 321, resin cover members 312 and 322 covering the outdoor side and the indoor side, and resin cover members 312 and 322. A resin upper end cover member 313 and a lower end cover member 323 are attached to the upper end surface and the lower end surface, respectively. As shown in FIGS. 3 and 5, the vertical frames 33, 33 are composed of metal core members 331, 331, resin cover members 332, 332 covering the outer sides thereof, and upper and lower end faces of the vertical frames 33, 33, respectively. and end cover members 333, 333 (see FIG. 5), respectively.

As shown in FIG. 1, the shoji 3 has a vertical structure in which an upper crosspiece 31 and a lower crosspiece 32 are arranged between vertical frames 33, 33 on the left and right sides. Specifically, the left and right vertical frames 33, 33 extend over the entire length of the shoji 3 in the vertical direction. The upper rail 31 and the lower rail 32 are arranged between the left and right vertical rails 33, 33, and connect the upper end portions and the lower end portions of the vertical rails 33, 33, respectively. The end cover members 333 on the upper and lower end faces of the vertical rails 33, 33 are arranged flush with the upper end cover member 313 of the upper rail 31 and the lower end cover member 323 of the lower rail 32, respectively. A substantially U-shaped handle 35 is attached to the central portion of the inner surface of the lower rail 32 .

The lower detachment prevention member 4 is the same member as the conventional one, and as shown in FIGS. 32 and the indoor side surface 32a.

As shown in FIG. 4, the lower retaining member 4 includes a holding portion 41 which is a vertically long rectangular metal or resin case, and a locking tongue made of a metal plate housed inside the holding portion 41. 42 , and a long hole 43 extending vertically through the holding portion 41 and the locking tongue piece 42 . The locking tongue piece 42 is formed in a long plate shape longer than the holding portion 41 in the vertical direction. A substantially upper half of the locking tongue piece 42 is inserted into the holding portion 41 . A substantially lower half of the locking tongue piece 42 protrudes from the holding portion 41 into the groove portion 224 of the lower frame 22 . Since the upper end surface 41a of the holding portion 41 is closed, the locking tongue piece 42 inside the holding portion 41 does not move upward. The corners of the locking tongue piece 42 protruding from the holding portion 41 are chamfered in an R shape.

The lower retaining member 4 is attached to the room-side surface 32 a of the lower rail 32 with a fixing screw 44 . Specifically, the lower retaining member 4 is arranged between the indoor-side surface 32 a of the lower rail 32 of the shoji 3 before being attached to the frame 2 and the base 351 of the handle 35 . The lower retaining member 4 is temporarily fixed by loosely fitting the fixing screw 44 for attaching the base 351 into the screw insertion hole of the base 351 . At this time, the shaft portion 431 of the fixing screw 44 is arranged on the lower end side of the elongated hole 43 so that the lower end portion of the lower retaining member 4 is inserted into the groove portion 224 of the lower frame 22 of the shoji 3 without hindrance. are moving upwards. Therefore, the lower retaining member 4 is temporarily fixed at a position higher than the final mounting position.

As will be described later, after the shoji 3 is fitted into the frame 2 by the Kendon method, the lower retaining member 4 is slid downward along the elongated hole 43 . As a result, the locking tongue piece 42 is inserted into the groove 224 of the lower frame 22 through the gap between the second hollow portion 222 of the lower frame 22 and the lower beam 32 of the shoji 3, as shown in FIG. The locking tongue piece 42 in the groove 224 protrudes downward from the lower end cover material 323 of the lower rail 32 of the shoji 3 and is arranged between the liner 227 and the second hollow portion 222 of the lower frame 22 . The lower end portion 42 a of the locking tongue piece 42 is close to the base plate portion 223 of the lower frame 22 . After that, by tightening the fixing screw 44 , the lower retaining member 4 is clamped between the lower rail 32 and the base portion 351 of the handle 35 and fixed to the lower rail 32 . Since the shaft portion 431 of the fixing screw 44 is arranged at the upper end of the long hole 43, the locking tongue piece 42 inside the holding portion 41 does not move downward.

By attaching the lower retaining member 4 to the lower rail 32 of the shoji 3, even if the shoji 3 moves upward due to pitching of an earthquake or the like, the locking tongue piece 42 is engaged with the groove 224 of the lower frame 22. maintain state. Therefore, the lower end of the shoji 3 is prevented from coming off the lower frame 22.例文帳に追加

Next, the upper retaining member 5 will be described with reference to FIGS. 1, 2 and 5. FIG. The upper detachment prevention member 5 is arranged on the upper end surface of the shoji 3 and protrudes upward. The upper detachment prevention member 5 of the present embodiment is composed of end cover members 333 made of resin that are attached to the upper end surfaces of the vertical rails 33 , 33 . The end cover material 333 is a member that connects the vertical frame 33 and the upper rail 31 . The upper retaining member 5 constituted by the end cover material 333 is attached to the upper end surface of the vertical frame 33 by the attachment leg portion 333b.

The upper retaining member 5 has hard resin ribs 51 a and 51 b formed integrally with the upper surface 333 a of the end cover member 333 . The ribs 51a and 51b extend in parallel along the longitudinal direction of the upper crosspiece 31 of the shoji 3 on the upper surface 333a of the end cover material 333 and protrude at a predetermined protruding height H1. An upper surface 333 a of the end cover material 333 is the upper end surface of the shoji 3 . The rib 51a is arranged close to the outdoor edge 333c of the upper surface 333a of the end cover member 333, and the rib 51b is arranged close to the indoor edge 333d of the upper surface 333a of the end cover member 333. be done. The protrusion heights of the two ribs 51a and 51b are the same. Since this upper retaining member 5 is formed integrally with the end cover material 333 of the vertical frame 33, it is low cost, and the upper part of the shoji 3 can be secured simply by attaching the end cover material 333 to the vertical frame 33. The detent member 5 can be easily provided.

Next, a method of inserting the shoji 3 into the frame 2 by the Kendon method will be described. As shown in FIG. 6, the shoji 3 is inserted into the groove 214 of the upper frame 21 and the groove 224 of the lower frame 22 from the indoor side in a Kendon manner. First, the upper end of the shoji 3 is tilted toward the outside of the room, and the upper end of the shoji 3 is inserted deep into the groove 214 of the upper frame 21 obliquely upward.

When the shoji 3 is inserted deep into the groove 214, as shown in FIG. A triangular space S having a low height on the indoor side is formed. The ribs 5a1 and 51b of the upper retaining member 5 protrude from the upper surface 333a of the end cover member 333 so as to be accommodated in the space S. As shown in FIG. Specifically, the ribs 51b arranged on the interior side of the space S where the height is low protrude from the upper surface 333a of the end cover member 333 so as to be accommodated within the space S. As shown in FIG.

To fit within the space S means that the ribs 51a and 51b do not interfere with the substrate portion 213 when inserting the upper end portion of the shoji 3 into the groove portion 214, thereby not interfering with the insertion operation of the shoji 3. It means that it protrudes to The ends of the ribs 51a and 51b may come into contact with the base plate portion 213 as long as the operation of inserting the shoji 3 is not hindered.

After inserting the upper end of the shoji 3 into the groove 214 , the lower end of the shoji 3 is moved toward the outside of the room and aligned with the groove 224 of the lower frame 22 . After that, the shoji 3 is lowered and the lower end of the shoji 3 is inserted into the groove 224 of the lower frame 22 . As a result, the upper and lower ends of the shoji 3 are accommodated in the grooves 214 and 224, respectively, and the shoji 3 is fitted and held between the upper frame 21 and the lower frame 22. As shown in FIG. The vertical frames 23, 23 bring the sealing portions 234, 234 into contact with the vertical frames 33, 33 of the shoji 3 from the outdoor side, thereby regulating the position of the shoji 3 on the outdoor side. The vertical frames 23 , 23 only bring the sealing portions 234 , 234 into contact with the surface of the shoji 3 on the outdoor side, and do not hold the shoji 3 . The sealing part 215 and the fin part 216 of the upper frame 21 secure airtightness and prevent rattling of the upper end of the shoji 3 by abutting against the upper end of the shoji 3 from the outside and the inside of the room, respectively. At the same time, it prevents dust and the like from entering from the outside. The sealing part 225 and the fin part 226 of the lower frame 22 secure airtightness and prevent rattling of the lower end of the shoji 3 by abutting against the lower end of the shoji 3 from the outside and the inside of the room, respectively. At the same time, it prevents dust and the like from entering from the outside.

When the shoji 3 is attached to the frame 2, the upper end of the shoji 3 is, as shown in FIG. increase in grip. Therefore, even if the shoji 3 moves downward or the position of the upper beam 31 of the shoji 3 is lowered, the engagement state between the groove 214 and the shoji 3 is maintained by the protrusion height H1 of the ribs 51a and 51b. and the shoji 3 is prevented from coming off the frame 2.例文帳に追加Since the ribs 51a and 51b have a height that can be accommodated in the space S between the upper end face of the shoji 3 inserted deep into the groove 214 and the substrate portion 213 in the groove 214, the ribs 51a and 51b are placed against the upper frame 21. The operation of inserting the shoji 3 is not hindered.

The protrusion heights of the two ribs 51a, 51b of the upper retaining member 5 may be different, as shown in FIG. In the upper detachment preventing member 5 shown in FIG. 8, the projection height H2 of the rib 51a on the exterior side is formed higher than the projection height H1 of the rib 51b on the interior side. This is because, as shown in FIG. 9, when the upper end of the shoji 3 is inserted obliquely upward into the groove 214 of the upper frame 21, the rib 51a on the outside of the room is positioned on the higher side of the space S. This is because it is placed in Since the rib 51a on the outdoor side can have a projection height H2 larger than that of the rib 51b on the indoor side, the hook of the upper end of the shoji 3 to the upper frame 21 can be further increased. As a result, the effect of preventing the shoji 3 from coming off the frame 2 can be improved.

The upper retaining member 5 can also be provided on the upper crosspiece 31 of the shoji 3, as shown in FIG. The upper retaining member 5 shown in FIG. 10 has a substrate 52 fixed to the upper surface 313 a of the upper end cover member 313 of the upper rail 31 with screws 53 . An upper surface 313 a of the upper end cover material 313 is the upper end surface of the shoji 3 . The ribs 51 a and 51 b are integrally formed on the upper surface of the substrate 52 . The outdoor-side rib 51 a is arranged close to the outdoor-side edge 313 b of the upper surface 313 a of the upper end cover member 313 .

A plurality of upper detachment preventing members 5 shown in FIG. 10 can be provided on the upper surface 313 a of the upper end cover member 313 at intervals in the longitudinal direction of the upper rail 31 . The ribs 51 a and 51 b and the substrate 52 may be formed along the entire length of the upper rail 31 . The ribs 51 a and 51 b may be formed integrally with the upper surface 313 a of the upper end cover member 313 in the same manner as the end cover member 333 of the vertical frame 33 .

The number of ribs that the upper detachment preventing member 5 has is not limited to two, which are respectively arranged on the outdoor side and the indoor side. At least one rib should be arranged close to the edges 313b and 333c on the upper end surface of the shoji 3 on the outdoor side.

In short, the FIX window 1, which is a fixture of the present embodiment, has the following effects. That is, the FIX window 1 includes a frame body 2 having an upper frame 21, a lower frame 22, left and right vertical frames 23, 23 and having grooves 214, 224 in the upper frame 21 and the lower frame 22, respectively; A frame 30 having a crosspiece 32 and left and right vertical frames 33, 33 has a surface member 34 inside, and the upper end and lower end are inserted into grooves 214, 224, respectively, so that the upper frame 21 and the lower frame 22 are attached. It has a shoji 3 to be held, and an upper detachment prevention member 5 provided on the upper end surface of the shoji 3 and protruding upward to prevent the shoji 3 from coming off the upper frame 21. - 特許庁The upper detachment prevention member 5 extends along the length direction of the upper crosspiece 31, and in a state in which the upper end of the shoji 3 is inserted obliquely upward into the groove 214 of the upper frame 21, the upper end surface of the shoji 3 and the substrate portion 213 which is the inner bottom surface of the groove portion 214. Ribs 51a and 51b protrude upward so as to fit in the space S between the groove portion 214 and the substrate portion 213, which is the inner bottom surface of the groove portion 214. As shown in FIG. According to this, the protrusion height of the ribs 51a and 51b of the upper detachment prevention member 5 increases the engagement with the upper frame 21, so that the shoji 3 moves downward and the position of the upper crosspiece 31 of the shoji 3 is changed. Even if it is lowered, the engagement state between the groove 214 and the shoji 3 is maintained by the protrusion height of the ribs 51a and 51b, and the shoji 3 is prevented from coming off the frame 2.例文帳に追加Since the ribs 51a and 51b have a height that can be accommodated in the space S between the upper end face of the shoji 3 inserted deep into the groove 214 and the substrate portion 213 in the groove 214, the ribs 51a and 51b are placed against the upper frame 21. The operation of inserting the shoji 3 is not hindered.

When the ribs are arranged at least close to the outdoor side edges 313b and 333c on the upper end surface of the shoji 3, the protrusion height of the ribs can be increased. can be further increased. As a result, the effect of preventing the shoji 3 from coming off the frame 2 can be improved.

When the ribs are provided on the upper end cover material 313 and the end cover material 333 that form the upper end surface of the shoji 3, the top cover member 313 and the end cover material 333 can be attached to the shoji 3 by simply attaching the upper end cover material 313 and the end cover material 333. 5 can be easily provided.

1 FIX window (fitting) 2 Frame body 21 Top frame 213 Substrate part (inner bottom surface of groove part) 22 Bottom frame 23 Vertical frame 3 Shoji screen 30 Frame body 31 Upper rail 313 Upper end cover material 313a Upper surface (upper end surface of shoji) 313b Outdoor-side edge 32 Lower rail 33 Vertical frame 333 End cover material 333a Upper surface (upper end surface of shoji) 333c Outdoor-side edge 34 Face material 5 Upper part retaining member 51a, 51b Rib S Space

Claims (3)

a frame body having an upper frame, a lower frame and left and right vertical frames and having grooves in the upper frame and the lower frame, respectively;
A shoji having a face member inside a frame having an upper rail, a lower rail, and left and right vertical frames, and held by the upper frame and the lower frame by inserting the upper end and the lower end into the groove, respectively. and,
an upper detachment prevention member provided on the upper end surface of the shoji and protruding upward to prevent the shoji from coming off the upper frame;
The upper retaining member extends along the length direction of the upper rail, and the upper end portion of the shoji is inserted obliquely upward into the groove of the upper frame, and the above-mentioned A fitting having ribs protruding upward so as to fit in a space between an upper end surface and an inner bottom surface of the groove. 2. The fitting according to claim 1, wherein said rib is arranged at least close to an outdoor-side edge of said upper end face of said shoji. The fitting according to claim 1 or 2, wherein said rib is provided on a cover material forming said upper end surface of said shoji.

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