JP2003097152A - Cleaning device for outdoor sash with flat sill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sill structure that can maintain high airtightness and high watertightness and easily clean dirt, dust, sand, and the like accumulated in a sill recessed part of a barrier-free type forming the upper face of a sash sill flat, without removing a sash. SOLUTION: In the outdoor opening sash structure, a sliding piece is hung from the lower rail side wall of a double sliding sash, and the sill is provided with a sill recessed part with a slide groove for guiding the sliding piece. A horizontal tight member is further interposed between the side wall of the sill recessed part and the sliding piece. A plurality of mounting locking pieces are provided from a sill base member, and an upper face flat member dividedly provided as an inner sash panel strip member and an outer sash panel strip member so as to be fitted to the mounting locking pieces are divided in a first left panel strip member, a second right panel strip member and a center panel strip member positioned between the first panel strip member and the second panel strip member. The center panel strip member is fixed to the lower frame base member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sash structure in which a shoji slides open / close in a sash frame attached to an outdoor opening of a building, and more particularly to a barrier-free sash lower frame whose upper surface is substantially flat. A structure that is easy to clean.

[0002]

2. Description of the Related Art In general, an outdoor opening of a building is provided with a sash structure in which an upper and lower frame and left and right vertical frames form a frame body, and a shoji slides inside the frame body. In this case, conventionally, as shown in FIG. 16, a ridge-shaped rail is protrudingly provided on the lower frame sash, and a door roller attached to the lower frame of the shoji rotates on the rail to move the shoji. Target. In addition, steps may be provided on the outdoor rails for outdoor sliding doors and indoor rails for indoor sliding doors so that the indoor side becomes higher, or the rail groove may be stepped between the outdoor and indoor sides. We are trying to prevent the intrusion of wind and rain. Therefore, although the upper part of the rail groove is open and can be cleaned, the rail groove is deep, and dust, sand, dust, etc. are likely to be accumulated and become unsanitary.

In the case of a barrier-free type sash structure in which the upper surface of the sash lower frame is formed flat, the wall of the rail groove is eliminated as shown in FIG. For sashes for buildings, wind pressure of about 500 Pa will be received in middle- and high-rise buildings, and air pressure difference due to temperature difference between the outside and the room will occur, and in order to prevent rainwater from entering the room, there is an air-tight seal between the shoji screen and the sash frame. In addition to securing the line, it is necessary to provide a drainage recess in order to ensure high drainage from the upper surface of the lower frame that forms the airtight line, and if dust, dust, sand, etc. collect in this recess, the sliding property of the shoji will be impeded. Could result in poor hygiene.

In recent years, in terrace doors of condominiums and the like, the size of the sash is increasing in order to improve the view, and it is necessary to increase the wind pressure resistance, so that the glass plate becomes thick and the shoji door becomes very heavy. Has become. In particular, for the purpose of energy saving, the use of double glazing and the use of laminated glass for the purpose of soundproofing are increasing, and the shoji becomes heavier, making it difficult to remove the shoji and clean the lower frame.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a sliding sliding door, a sliding sliding door, etc., which slides and opens the lower frame upper surface of a sash composed of vertical and left and right vertical frames attached to a building outdoor opening, As shown in FIG. 15 which is a conceptual view of the construction of the outdoor barrier-free sash according to the present invention, dust, dust, sand, etc. collected in the recess of the barrier-free type lower frame in which the upper surface of the sash lower frame is flat is not removed. The purpose is to provide a lower frame structure that can be easily cleaned and maintains high airtightness and watertightness.

[0006]

The invention according to claim 1 is
A slide groove that is composed of upper and lower frames and left and right vertical frames, and slides the slide piece from the lower frame side wall of the sliding shoji that slides open and close in the frame where the lower frame upper surface is formed into a substantially flat surface and guides the slide piece. In the outdoor opening sash structure in which the lower frame recess having the above is provided in the lower frame, and the horizontal tight material is interposed between the side wall of the lower frame recess and the slide piece, a plurality of attachment locking pieces are provided from the lower frame base member. An upper surface flat member that is fitted to the attachment locking piece and is provided separately for the eye sliding plate material for the internal shoji and the external sliding door is a left side eye plate material first member from the indoor side to the outdoor side direction. And the right eye plate material second member and the eye plate material central member located between the eye plate material first member and the eye plate material second member, and the inner and outer shoji are moved to the right side to remove the shoji inside and outside. Removably attach the 1st member of the eye plate material for shoji, Among without removing the shoji Intention a shoji on the left, the outer sash for the first plate a second member capable mounted desorbed, among were fixed outer sash for th plate central member to the lower frame.

Since an upper surface flat member (eye plate material) having a slide groove width narrower than the width of the lower frame recess in the indoor and outdoor directions is mounted, there is no step as compared with the conventional rail system, and dust and the like in the lower frame recess Although the invasion can be suppressed, if dust, dust, sand or the like is accumulated in the lower frame concave portion as shown in FIG. 12, it is necessary to remove the eye plate material for cleaning as shown in FIG. In this case, as in the invention according to claim 1, a plurality of attachment locking pieces are provided from the lower frame base member, and the inner shoji and the outer shoji are divided so as to be fitted to the attachment locking pieces. Since the plate material is divided into three parts, for example, as shown in FIG. 2, while maintaining high watertightness, as shown in FIG. First member for external shoji screens and first member for internal shoji screens
The lower frame recess can be cleaned by removing the members, and then the inner and outer shoji screens are moved to the left side to remove the outer shoji plate material 2nd member and the inner shoji plate material 2nd member as shown in FIG. You can clean it and replace the eye plate material. This makes it possible to achieve both easy cleaning and high watertightness. At this time, as shown in FIG. 14 for reference, the structure of the lower frame is originally excellent in drainage, so that cleaning can be easily performed by flowing water with a hose or the like.

According to a second aspect of the present invention, a sliding door is slidably mounted between the upper frame and the lower frame, and the upper surface of the sash lower frame of the outdoor pull-on-shake sliding door having a building opening and a sliding door storage portion is substantially flat. The sliding door slide piece is formed on the surface, and the sliding door slide piece is hung from the side wall of the sliding door slide, and the lower frame recess having the sliding door slide groove for guiding the sliding door slide piece is provided in the lower frame. In the sash structure in which the horizontal tight material is interposed when the shoji is closed between the side wall of the recess and the sash structure, a plurality of attachment locking pieces are provided from the lower frame base member so that they can be fitted to the attachment locking pieces. The provided upper flat member is a left eye plate material first member, a right eye plate material second member, and an eye plate material central member located between the eye plate material first member and the eye plate material second member in a direction from the indoor side to the outdoor side. And move the movable shoji to the right. The eye plate material first member is detachably attached without removing the movable shoji, and the eye plate material second member is detachably attached without moving the movable shoji to the left side and the movable shoji is attached, and the eye plate material central member is used as the lower frame. Fixed

For example, in the case of an externally moving piece pulling shoji, as shown in FIG. 9 (a), a sliding door sliding groove is provided on the mounting locking piece provided on the lower frame base member to fit the upper surface member. While ensuring drainage and water tightness of rainwater,
As shown in FIG. 11, the movable shoji is moved to the right side, only the eye plate material first member is removed, the lower frame recess is cleaned, and then the eye plate material first member is attached to the lower frame as before, and then as shown in FIG. Since the movable shoji screen is moved to the left and only the second eye plate member is removed to clean the lower frame recess, and the eye plate member can be attached as it is, it is not necessary to remove the shoji screen for cleaning. Also, high watertightness can be maintained simply by attaching the eye plate material as it was.

If the detachable knob members are attached to the vertical frame side of the eye plate material first member and the eye plate material second member of the upper surface flat member (eye plate material) provided on the upper surface of the lower frame, the eye plate material can be easily attached and detached. become. At this time, the knob member attached to the eye plate material on the side where the shoji closes (the eye plate material located under the shoji when the shoji closes) projects above the sliding surface of the lower frame so as not to obstruct the closing of the shoji. Do not do this, and the knob member attached to the eye plate material on the side that opens the shoji (the eye plate material that is located under the shoji when opening the shoji) should protrude above the sliding surface of the lower frame and serve as a stopper when opening the shoji. Can also play the role of.

By interposing an elastic material between the knob member attached to the upper flat member (eye plate material) and the vertical frame, it is possible to absorb variations in the machining size of the eye plate material with respect to the length dimension of the eye plate material attachment portion of the lower frame. The elastic force with respect to the vertical frame acts so that the left and right eye plate materials are pressed against the central member side, and a gap is prevented from being formed at the division of the eye plate material.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below as an example in which it is applied to a sliding shoji sash structure. FIG. 15 shows an image diagram to which the cleaning device for an outdoor lower frame flat sash according to the present invention is applied. FIG. 18 shows an example of a floor plan of a reinforced concrete building house, and FIG. 17 shows a cross section of the outdoor opening. On the outside of a building house, a grating for drainage is installed, a step adjusting block is laid outside the building, and a balcony is installed on the outside, and a safety fence such as a handrail is installed on the outside. A sash structure including the cleaning device according to the present invention is adopted at the entrance to the balcony from the room.

FIG. 1 is a sectional view of a sash structure according to the present invention, where (b) is a longitudinal sectional view and (c) is a lateral sectional view.
The layout of the top flat member (eye plate material) is shown in FIG. First,
The overall structure of the sash structure will be described. As shown in FIG. 17, the lower frame 10 attached to the frame by the anchor 8 and the upper frame 40 as shown in FIG. 1B and the one shown in FIG. A frame body is formed by the sashes of the left vertical frame 20 and the right vertical frame 30, and the external shoji 50 and the internal shoji 60 are attached to the inside from the outdoor side. The upper surface of the lower frame is formed substantially flat,
As shown in FIG. 17, it has a barrier-free structure in which the floor surface of the indoor floor, the upper surface of the lower frame, and the floor surface of the balcony are arranged substantially horizontally via the grating.

As shown in the enlarged vertical cross-sectional views of the lower frame in FIGS. 1 and 2, the external shoji 50 includes an external shoji lower frame 51 and an upper frame 55.
A frame is formed by the outer shoji door support frame 52 and the outer shoji sliding frame 53, and glass or the like is mounted inside. Outer shoji lower frame 5
An external shoji slide piece 51a is hung on the indoor side of No. 1. An external shoji door pulley 54 is attached to the external shoji lower frame recess 51b of the lower frame, and the external shoji moves on the upper surfaces of the upper surface flat members (eye plate materials) 1a, 2a, 3a of the lower frame 10. The inner shoji 60 is similar to the outer shoji, and the inner shoji lower frame 61 and the upper shovel 6
5, the inner shoji door support frame 62 and the inner shoji sliding frame 63 form a frame, and glass or the like is attached to the inside. An inner shoji sliding piece 61a is hung on the indoor side of the inner shoji lower frame 61,
An inner shoji door pulley 64 is attached to the inner shob lower frame recess portion 61b of the lower frame, and an upper flat member (eye plate material) 1b of the lower frame 10 is provided.
The inner shoji moves on the upper surfaces of 2b and 3b.

Next, the structure of the eye plate material will be described with reference to FIG.
As shown in (a), the external sliding screen sheet material is the left external sliding screen sheet material first member 1a and the right external sliding screen sheet material second member 2a.
Also, it has a three-part structure of the eyebaff central member 3a for external shoji. In addition, the eye sliding plate material for internal shoji also has a three-part structure of the left eye sliding plate first member 1b, the right inner sliding screen second member 2b and the inner sliding screen central member 3b. As shown in FIG. 2, the cross-sectional shape is such that a plurality of attachment locking pieces 100b are provided on the upper portion of the base member 100 of the lower frame 10, and the eye sliding plate eye plate locking pieces 103 and 104 and the internal sliding door eye plate material locking piece 101 are provided. , 102, which are detachably fitted. Since the center member of the eye plate member is not normally removed, it is fixed by a fixing member 4 such as a screw.

By adopting such a structure of the eye plate member, the external shoji screen is opened and brought to the right side as shown in FIG. 3 from a state in which the external shoji screen 50 and the internal shoji screen 60 shown in FIG. 1C are closed. In this state, the first sheet member 1a for external shoji screens and the first member 1b for internal shoji screens are removed, the lower frame recess is cleaned, and the eye plate member is attached as it was. Then, as shown in FIG. With the shoji screen open and the shoji screen moved to the left side, the eye board material second member 2a for external shoji and the eye plate material second member 2b for inner shoji can be removed and cleaned, and the eye board material can be returned to the original state. .

A detachable knob member is attached to the eye plate member as shown in FIGS. 5 to 7, and FIG. 5 shows the first knob member 5 on the side where the shoji closes, and (a) is a plan view. ,
(B) shows the side view. It is attached so as not to project from the upper surface of the eye plate material so as not to hinder the closing of the shoji screen, and the first knob member recess 5a for inserting the fingertip is provided to facilitate the handling of the eye plate material when detaching. Further, the insertion portion 5b is formed in conformity with the inner cross-sectional shape of the eye plate member, and the elastic piece 5c is provided on the opposite side to the contact side with the vertical frame. The left and right eye plate materials are pressed against the central portion by the elastic pieces.

FIG. 6 shows a second knob member attached to the vertical frame side of the open side eye plate member 2a of the shoji screen, (a) being a plan view,
(B) shows the side view. The second knob member is attached to the upper surface of the eye plate member, the second knob member protruding portion 6b is inserted into the eye hole of the eye plate member, and the second knob member is attached to the eye plate member with a screw or the like in the second knob member attaching hole 6d. . Second
An elastic piece 6c is provided on the vertical frame side wall of the knob member. The second knob member also has a function of facilitating the attachment / detachment of the eye plate material and protecting the handle and the lock attached to the shoji when opening the shoji.

FIG. 7 shows a third knob member attached to the vertical frame side of the inner sliding door opening side eye plate material 1b, (a) is a plan view and (b) is a side view thereof. Similarly to the second knob member, the third knob member is also provided with the third knob member projecting portion 7b, the third knob member mounting hole 7d, and the third knob member elastic piece 7c. In the first to third knob members, an example in which the elastic material is provided on the knob side is shown, but as long as it has an action of pressing the left and right eye plate materials toward the center eye plate material, the vertical frame side is provided. It may be provided.

Since the eye plate material is divided into three parts as described above and the knob member is attached to the vertical frame side of the eye plate material, as shown in FIG. 14 as a reference diagram, the eye plate material can be easily removed without removing the shoji. Since the lower frame has a structure with excellent drainage, it can be easily cleaned by flowing water with a hose. The structure of this lower frame will be described below. Lower frame 1
Reference numeral 0 denotes an outer shoji sliding piece 51a hanging on the lower frame of the outer shoji and inner shoji, an outer shoji sliding groove 11a on which the inner shoji sliding piece 61a slides, and an outer shoji lower frame recess 12a having an inner shoji sliding groove 11b. The lower frame recess 12b for shoji is provided, and the lateral tight material fitting groove 1 for outer shoji is provided on the indoor side wall of the recess.
3a, a horizontal tight material fitting groove 13b for internal shoji, a lateral tight material 14a for external shoji and a lateral tight material 14b for internal shoji are arranged, and these lateral tight materials are in sliding contact with sliding pieces of the shoji. . In addition, a bottom frame recess drainage port 17a for external shoji, a bottom frame recess drainage port 17b for inner shoji, and a bottom frame outdoor drainage port 18 are provided, and rainwater sprayed onto a shoji screen or the like falls,
From the external shoji sliding groove 11a and the inner shoji sliding groove 11b on the flat upper surface of the lower frame, the lower frame recess drainage port 17 for external shoji
a and the lower frame recess drainage port 17b for internal shoji, and is drained to the outside through the lower frame outdoor drainage port 18 provided on the lower frame outdoor side.
A back wind / back water stop member 19 is pivotally attached to the outside of the lower frame outdoor drainage port 18 so as to cover the drainage port.

An example in which the cleaning structure according to the present invention is applied to a sliding door will be described below. Fig. 8 (B) shows a vertical cross-sectional view of the outward-moving sliding door structure, and Fig. 8 (C) shows a cross-sectional view thereof.
(A) shows a layout of the eye plate material. The sash frame is the lower frame 110
And the upper frame 140 and the left vertical frame 12 from the indoor to the outdoor
0, the right vertical frame 130 has a rectangular shape. A movable sliding door 150 is slidably mounted on the outdoor side in the sash frame, and a stationary sliding door 160 is mounted on the indoor side.
The movable shoji 150 includes a movable shoji lower frame 151 and a movable shoji upper frame 1.
55, movable shoji door frame 152 and movable shoji summing frame 15
A frame is formed by 3, and glass 156 and the like are mounted inside. On the other hand, the fixed shoji is the lower frame 110 and the fixed shoji upper frame 16
5. The glass 166 is attached to the right frame 130 and the vertical bone 170 by a so-called fit-and-kill method. A movable shoji sliding piece 151a is hung on the movable shoji lower frame 151 of the movable shoji 150, a movable shoji door wheel 154 is attached to the movable shoji lower frame, and the shoji moves along a guide strip on a substantially flat surface of the lower frame 10. The lower frame 110 is provided with a lower frame recess 112a having a movable shoji slide groove 111 in which a movable shoji slide piece 151a hanging on the lower sliding frame slides, and a horizontal tight material fitting groove 113 is formed on the indoor side wall of the lower frame recess. And the horizontal tight member 114 is provided, and the movable shoji slide piece 151a is provided.
The lower frame recess is provided with a drain outlet 117a. Further, the lower frame base member 110a is provided with a plurality of attachment locking pieces 110b, and the eye plate member 110c is attached to the opening fixing shoji side, and the movable shoji slides upper surface members (eye plate materials) 1A, 2A, 3A. Is attached.

In the case of an externally-moving shoji shoji, as shown in FIG. 10, for example, with the movable shoji open, the movable shoji eye plate material first member 1A is removed to clean the lower frame recessed portion. It is possible to attach the plate material first member as it was, then close the movable shoji and remove the movable shoji eye plate material second member 2A for cleaning and return the eye plate material to the original state. Further, the movable shoji plate material central member 3A is fixed by screws or the like. A removable movable shoji first knob member 5A and a movable shoji second knob member 6A are attached to the eye plate member.

[0023]

The sash structure of the present invention is a high watertight structure in which the upper surface of the sash lower frame is formed flat and the upper plate of the lower frame recess is provided with the eye plate material to provide the narrow slide groove corresponding to the width of the slide piece. Therefore, it is difficult for dust and the like to enter the lower frame concave portion with the eye plate material and the tight material. However, when dust or the like is accumulated, the eye plate material is divided into three parts in the longitudinal direction, and the knob is provided at the end of the vertical frame side. Since the member is attached, the eye plate material can be easily removed without removing the shoji screen, so cleaning can be easily performed, and by returning it to the original state, high airtightness and high watertightness can be maintained.

[Brief description of drawings]

FIG. 1 shows an example in which a cleaning structure for a lower frame flat sash according to the present invention is applied to a sliding shoji.

FIG. 2 is a vertical sectional view of a lower frame flat sash structure.

FIG. 3 shows a state in which a shoji screen is moved to the right side and a left eye plate material is removed.

FIG. 4 shows a state in which the shoji is moved to the left side and the eye plate material on the right side is removed.

FIG. 5 shows a first knob member.

FIG. 6 shows a second knob member.

FIG. 7 shows a third knob member.

FIG. 8 shows an example in which the lower frame flat sash cleaning structure according to the present invention is applied to a pulling screen.

FIG. 9 shows a vertical cross-sectional view of a retractable shoji.

FIG. 10 shows a state in which the eye plate member is removed with the movable shoji opened.

FIG. 11 shows a state in which the eye plate member is removed with the movable shoji closed.

FIG. 12 shows a state in which dust or the like has entered the lower frame slide groove.

FIG. 13 shows a state in which an eye plate material is removed.

FIG. 14 shows a state in which the eye plate material is removed for cleaning.

FIG. 15 is a construction image diagram to which an outdoor barrier-free sash cleaning structure according to the present invention is applied.

[Fig. 16] Fig. 16 is a construction image diagram of the conventional sash as seen from the balcony side and the indoor side of the apartment.

FIG. 17 is a vertical sectional view of an outdoor opening.

FIG. 18 shows an example of a floor plan.

[Explanation of symbols]

1a 1st member for external sliding screens 1b 1st member for internal sliding screens 1a 2a 2nd member for external sliding screens 2b 2nd member for internal sliding screens 2a 3 Central member for external sliding screens 3b Internal plate for internal sliding screens Central member 4 Eye plate material Central member fixing member 5 1st knob member 5a 1st knob member recess 5b
1st knob member insertion part 5c 1st knob member elastic piece 6 2nd knob member 6b
2nd knob member protrusion 6c 2nd knob member elastic piece 6d 2nd knob member attachment hole 7 3rd knob member 7b
Third knob member protruding portion 7c Third knob member elastic piece 7d Second knob member mounting hole 10 Lower frame 100 Lower frame base member 100b Lower frame base member mounting locking piece 101, 102 Inner shoji eye plate material locking piece 103, 104 Eye-plate material locking piece for external shoji 11 Flat surface (upper surface) 11a External shoji sliding groove 11b Internal shoji sliding groove 12a External shoji drainage recess 12b Internal shoji draining recess 13a External shoji horizontal tight material fitting groove 13b Internal shoji Horizontal tight material fitting groove 14a Horizontal tight material for external shoji 14b Horizontal tight material for internal shoji 17a Recessed drainage hole for external shoji 17b Inner sliding door recessed drainage hole 18 Lower frame outdoor drainage port 19 Back wind, backwater stop member 20 Left vertical Frame 30 Right Vertical Frame 40 Upper Frame 50 External Shoji 60 Internal Shoji 51 External Shoji Lower Frame 61 Internal Shoji Lower Frame 51a External Shoji Slide Piece 61a Internal Shoji Slide Piece 51b External Obstacle Inner sliding door recessed portion 61b Inner sliding door lower door recessed portion 52 Outer sliding door door tolling 62 Inner sliding door door tolling 53 Outer sliding door fitting frame 63 Inner sliding door fitting frame 53a Outer sliding door butting piece 63a Inner sliding door butting piece 54 Outer sliding door car 64 inside Shoji Doorway 55 External Shoji Upper Frame 65 Inner Shoji Upper Frame 1A Movable Shoji Board Material 1st Member 2A Movable Shoji Board Material 2nd Member 3A Movable Shoji Board Material Central Member 5A Movable Shoji 1st Knob Member 6A Movable Shoji 2nd Knob Member 110 Single sliding door lower frame 140 Single sliding door upper frame 110a Lower frame base member 110b Mounting locking piece 110c Single sliding door eye plate material 120 Single sliding door left vertical frame 130 Single sliding door right vertical frame 112a Lower frame recess 113 Horizontal tight material fitting groove 114 Horizontal tight Material 150 Movable shoji 160 Fixed shoji 151a Movable shoji sliding piece 151 Movable shoji lower frame 152 Movable shoji door tow frame 153 Movable shoji combination frame 155 Allowed Moving shoji upper frame 165 Fixed shoji upper frame

Claims (2)

[Claims] 1. A slide piece is hung from a side wall of a lower frame of a sliding shoji which is composed of an upper and lower frame and left and right vertical frames, and which opens and closes in a frame whose upper surface is a substantially flat surface. In the outdoor opening sash structure in which a lower frame recess having a slide groove for guiding the lower frame is provided in the lower frame, and a horizontal tight material is interposed between the side wall of the lower frame recess and the slide piece, a plurality of mounting members are mounted from the lower frame base member. A stop piece is provided so that it can be fitted to this attachment locking piece, and an upper surface flat member separately provided for the inner sliding door sheet material and the outer sliding door sheet material is left from the indoor side to the outdoor side. The eye plate material first member and the right eye plate material second member and the eye plate material central member located between the eye plate material first member and the eye plate material second member are divided, and the shoji screen is removed by moving the inner and outer shoji to the right side. No. 1 inner and outer eye plate materials for shoji
Without removing the shoji by pulling the inner and outer shoji to the left side, the second part of the eye board material for the outer shoji is detachably installed, and the central member of the eye board material for the inner and outer shoji is placed downwards. Cleaning structure for outdoor lower frame flat sash, which is fixed to the frame. 2. A sliding door is slidably mounted between an upper frame and a lower frame, and an upper surface of a sash lower frame of an outdoor pulling door shovel having a building opening and a sliding door storage portion is formed into a substantially flat surface. A shoji sliding piece is hung from the side wall of the shoji lower frame that slides on a flat surface, and a bottom frame recess having a shoji sliding groove that guides the shoji sliding piece is provided in the bottom frame, and between the shoji sliding piece and the side wall of the bottom frame recess. In the sash structure in which a horizontal tight member is interposed when the shoji screen is closed, a plurality of attachment locking pieces are provided from the lower frame base member, and an upper surface flat member provided so as to be fitted to the attachment locking pieces is provided. The movable sliding door is divided into a left eye plate material first member, a right eye plate material second member, and an eye plate material central member located between the eye plate material first member and the eye plate material second member in the direction from the indoor side to the outdoor side. To the right to remove the movable shoji. The first part of the eye plate material is detachably attached, and the second member of the eye plate material is detachably attached without moving the movable shoji to the left side to remove the movable shoji, and the central member of the eye plate material is fixed to the lower frame. Cleaning structure of the outdoor bottom flat sash.