JP5366247B2 - Natural ventilation window - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an appearance good by concealing a sliding screen opening/closing device from outside, and prevent the adhesion of rubbish, dust, etc., the intrusion of insects, and the like, when the sliding screen opening/closing device is mounted on a window for natural ventilation. <P>SOLUTION: In this window 1A for natural ventilation, the sliding screen opening/closing device 40 for performing the opening operation of putting a sliding screen 3 into an opened state from a closed one and/or the closing operation of putting the sliding screen 3 into the closed state from the opened one is mounted on the indoor side of a sill or a transom. A cover material 41 for covering the under and front surfaces of the sliding screen opening/closing device 40 is attached; and end covers 43 and 43 are attached to both end surfaces of the cover material 41, respectively. Thus, the sliding screen opening/closing device 40 is concealed from outside. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a window for performing natural ventilation such as wind ventilation and gravity ventilation while automatically adjusting the opening degree by wind pressure.

  In recent years, frequent ventilation has been recommended for measures such as sick house. Ventilation methods are broadly divided into natural ventilation and mechanical ventilation. The former natural ventilation is classified into wind ventilation and gravity ventilation. Wind ventilation opens two windows on different sides of the room and uses the positive pressure on the windward side and the negative pressure on the leeward side to ventilate, and the gravity ventilation is warmed. Ventilation is achieved using the principle that air rises lightly.

  As the window for natural ventilation, for example, in Patent Document 1 below, a window frame that is attached facing the outside of the building, a state in which the window is housed in the window frame and the window is closed, and a shoji that is opened outward from the window frame. A natural wind ventilation window having both ends of a rigid frame on both sides of the window frame and a shoji screen, with one end pivotally attached to the upper portion of the shovel and the other end being lower than the one end. A short-length main arm that is pivotally attached, and a sub-arm that is pivotally attached at one end to the middle of the heel and pivotally attached at the other end to the lower part of the heel frame and longer than the main arm. In the state, each arm is oriented substantially vertically, and the pivot position of each arm to the collar is located above the pivot position of each arm to the collar, and The pivoting position is on the indoor side of the center of gravity of the shoji, and relaxed by the weight of the shoji when there is no wind And crab fenestration, natural wind ventilation window to 閉窓 by the wind blowing toward the shoji from the external side have been proposed at the time of fenestration.

Japanese Patent No. 3777441

  However, in the case of a natural wind ventilation window as described in Patent Document 1 above, since it is often provided at a relatively high place that is generally out of reach of human hands, it is necessary to automate the opening and closing operation of the shoji. A shoji door opening / closing device may be provided. However, since the shoji opening / closing device is provided so as to protrude toward the lower frame or the invisible room, there is a problem in that the shoji opening / closing device deteriorates in appearance when viewed from the inside and outside the room. Further, the natural wind ventilation window has a problem that it cannot prevent dust and dirt from adhering to the shoji switchgear and insects entering when the window is open (in a natural ventilation state).

  Therefore, the main problem of the present invention is that the window frame attached to the outer wall of the building and the lower side of the window frame that is accommodated in the window frame squeeze outward and open, and are stationary in an equilibrium state that balances the force when the window is opened. A natural ventilation window comprising a shoji that maintains the state and automatically adjusts the opening degree from the stationary state by the wind pressure from the outside or the inside. In addition, when attaching a shoji opening / closing device that performs an opening operation to change the shoji from the closed state to an open state and / or a closing operation to make the shoji from the open state to the closed state, the shoji opening / closing device is concealed from the outside and looks good In addition, it is to prevent adhesion of dust, dust, etc. and insect invasion.

In order to solve the above-mentioned problem, as the present invention according to claim 1, a window frame attached to the outer wall of a building, and a lower side of the window frame accommodated in the window frame are opened to the outside and opened, and a force is applied when the window is opened. In a natural ventilation window consisting of a shoji that maintains a stationary state in a balanced state that is balanced and automatically adjusts the opening degree from the stationary state by the wind pressure from the outside or the inside,
At the lower frame of the natural ventilation window or on the inside of the room, a shoji opening / closing device for opening the shoji from the closed state to the open state and / or closing from the open state to the closed state is attached.
A cover material for covering the upper surface, the lower surface and the front surface of the shoji switching device is attached, and end covers are attached to both end faces of the cover material to conceal the shoji switching device and cover the upper surface of the shoji switching device. There is provided a natural ventilation window characterized in that a fixing part on the lower end side of the screen door is provided on the material.

  According to the first aspect of the present invention, the shoji opening / closing operation for opening the shoji from the closed state to the open state and / or closing the shoji from the open state to the open state on the lower frame or the inside of the room. In the natural ventilation window to which the device is attached, the cover material for covering the upper surface, the lower surface and the front surface of the shoji opening and closing device is attached, and end covers are attached to both end faces of the cover material, thereby Hide from the outside. Therefore, when visually inspecting from the lower side of the window, the appearance of the shoji opening and closing device provided so as to protrude from the lower frame or the invisible room is made invisible. Furthermore, it is possible to prevent dust and dirt from attaching to the shoji opening and closing device and insects and the like from entering when the window is opened (natural ventilation state).

In addition, by providing an upper surface material that covers the upper surface of the shoji opening and closing device, it is possible to more reliably prevent dust, dirt, and insects from entering. Furthermore, since the upper end material is provided with the fixing portion on the lower end side of the screen door, the screen door can be installed arbitrarily and easily.

As the present invention according to claim 2, in a balanced state in which the window frame attached to the outer wall of the building and the lower heel side housed in the window frame squeeze outward and open, and the force is balanced when the window is opened In the natural ventilation window consisting of a shoji that keeps the stationary state and automatically adjusts the opening degree by the wind pressure from the outside or inside from this stationary state,
At the lower frame of the natural ventilation window or on the inside of the room, a shoji opening / closing device for opening the shoji from the closed state to the open state and / or closing from the open state to the closed state is attached.
A cover material for covering the upper surface, the lower surface and the front surface of the shoji switchgear is attached, and an end lid is attached to one end face of the cover material or is closed by a side face, and the other end face is a side face. The natural ventilation window is provided, wherein the screen door opening / closing device is concealed , and the screen door lower end side fixing portion is provided on the upper surface material covering the upper surface of the sliding door opening / closing device .

The invention described in claim 2 shows an aspect in the case of a vertical window window. Although the point which attaches the cover material for covering the upper surface of the said shoji switching device , the lower surface, and the front, and the point which provides the fixing | fixed part of the screen door lower end side to the said upper surface material are the same as that of the invention of the said Claim 1, For the edge shoji of the continuous window, the end cover is attached to one end face of the cover material, and the other end face is closed by a side face, and the cover material is used for the intermediate shoji. The one side end face is closed by a vertical side surface, and the other side end face is closed by a vertical side face.

  As described above in detail, according to the present invention, the window frame attached to the outer wall of the building, and the lower housing side which is accommodated in the window frame are opened to the outside and opened, and the balanced state in which the force is balanced when the window is opened In a natural ventilation window comprising a shoji that maintains a stationary state and automatically adjusts the opening degree by the wind pressure from the outside or inside from this stationary state, When installing a shoji opening / closing device that opens and / or closes the shoji from the closed state to the open state on the indoor side, the shoji opening / closing device is concealed from the outside. It is possible to prevent dust and dust from attaching and insects from entering. Moreover, insects can be prevented from entering by making it possible to easily attach the screen door.

It is an inside view of window 1 for natural ventilation. It is the II-II arrow directional view (longitudinal sectional view) of FIG. It is the III-III arrow directional view (cross-sectional view) of FIG. It is a side part perspective view of natural ventilation window 1A. It is a one-side front view which shows the connection state of the shoji 3 and the window frame 2. FIG. It is the VI-VI line arrow directional view of FIG. It is the VII-VII line arrow directional view of FIG. It is a longitudinal cross-sectional view which shows the connection state of the shoji 3 and the window frame 2. FIG. It is the IX-IX line arrow directional view of FIG. The anti-rotation device 17 is shown, (A) is a plan view and (B) is a front view. It is a closed window state figure for demonstrating the operation state of the shoji. FIG. 12 is a view taken along the line XII-XII in FIG. 11. It is an open operation state diagram for demonstrating the operating state of the shoji. It is the XIV-XIV line arrow directional view of FIG. It is a balance state diagram for demonstrating the operating state of the shoji. It is the XVI-XVI line arrow figure of FIG. It is a longitudinal cross-sectional view which shows the 2nd example of a storage structure of the shoji switchgear 40. FIG. It is a perspective view which shows the attachment point of the cover material 41 in the continuous-frame window of a vertical bone system. It is a perspective view which shows the attachment point of the cover material 41 in the vertical-type continuous window.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Structure of natural ventilation window 1]
1 is an interior view of the natural ventilation window 1, FIG. 2 is a view taken along the line II-II in FIG. 1, FIG. 3 is a view taken along the line III-III in FIG. 1, and FIG. It is a perspective view.

  The window shown in FIG. 1 is a two-step upper and lower stage window in which a natural ventilation window 1A is installed on the upper side and a fitting window 1B is installed on the lower side.

  The natural ventilation window 1A is housed in a window frame, and the lower side of the natural ventilation window opens and opens toward the outside. The natural ventilation window 1A maintains a stationary state in an equilibrium state in which force is balanced when the window is opened. As shown in FIG. 2, the shoji 3 is moved from the closed state to the lower heel side from the closed state to the lower frame or the invisible room side. A shoji opening / closing device 40 is attached which performs an opening operation for pushing outward toward the outside and / or a closing operation for retracting the shoji 3 from the open state to the window frame side to close it.

[Structural example of natural ventilation window 1A]
As shown in FIGS. 1 to 3, the natural ventilation window 1A has an upper frame 3A, a lower frame 3B on the inner side of the window frame 2 in which an upper frame 2A, a lower frame 2B and vertical frames 2C, 2D are assembled in four directions. In addition, the shovels 3C and 3D are assembled in four directions, and the shoji 3 with the glass G fitted therein is accommodated, and the lower shovel 3B side of the shoji 3 is swung outward and opened.

  The supporting structure of the shoji 3 is such that one end is pivotally attached to the upper part of the vertical eaves 3C and 3D and the other end is the one end between the vertical frames 2C and 2D of the window frame 2 and the eaves 3C and 3D of the shoji 3, respectively. The upper side arms 4 and 4 of relatively short length pivotally attached to the vertical frames 2C and 2D at the lower position, and one end pivotally attached to the middle part of the vertical rods 3C and 3D, and the other end from the one end The lower arms 5 and 5 are relatively long and pivotally attached to the vertical frames 2C and 2D at the lower position.

  This will be described in more detail below.

  The window frame 2 is formed by four-way assembly of an upper frame 2A, a lower frame 2B, and vertical frames 2C and 2D made of an aluminum alloy to form a frame body. Each of the upper frame 2A, the lower frame 2B, and the vertical frames 2C, 2D includes seal holding pieces 2a, 2b, 2c, and 2d at positions closer to the indoor side, and a solid seal 6 at the tip.

  The shoji 3 is composed of an upper iron 3A, a lower iron 3B, and vertical irons 3C, 3D, which are also made of an aluminum alloy, and a glass G is fitted and supported therein. In the state in which the shoji 3 is closed, the airtightness is maintained by the indoor side surfaces of the upper and lower cages 3A, 3B and 3C, 3D coming into contact with the solid seal 6.

  As shown in FIG. 5, the reinforcing base plates 7A and 7B are disposed on the side surface of the vertical rod 3C (3D), and the reinforcing base plate 8 is disposed on the inner surface side of the vertical frame 2C (2D). Install a pivot base member that also serves as a reinforcement. For installation, a backing material is arranged on the opposite side through the window member to fix the screws.

As shown in FIG. 6, the upper arm 4 is pivotally attached to the reinforcing base plate 7 </ b> A at the upper end serving as the pivot point 3 </ b> C (3 </ b> D) side pivot point A, and the vertical frame 2 </ b> C (2 </ b> D) side A lower end serving as a pivot point B is pivotally attached to the reinforcing base plate 8. At this time, when the upper arm 4 is in the closed state, as shown in FIG. 11, the vertical pivot side pivot point A is positioned outside the vertical frame side pivot point B by the shift amount S _1. The vertical frame side pivot point B is located on the indoor side of the center of gravity K of the shoji.

  On the other hand, as shown in FIG. 7, the lower arm 5 is pivotally attached to the reinforcing base plate 7A, 7B at the upper end serving as the vertical pivot 3C (3D) side pivot point C, and the vertical frame 2C. (2D) The lower end serving as the side pivot point D is pivotally attached to the reinforcing base plate 8. At this time, when the lower arm 5 is in the closed state, as shown in FIG. 11, the vertical arm side pivot point C is on the vertical line passing the vertical frame side pivot point D, or the upper arm 4 On the contrary, it is slightly biased to the indoor side. The amount of deviation is 1 to 10 mm, preferably 1 to 5 mm. In the illustrated example, the vertical pivot side pivot point C is biased to the indoor side by 1 mm from the vertical frame pivot point D.

  As shown in FIG. 5, the lower arm 5 is configured by connecting two members with screws so as to be applied to windows of different sizes to form one arm. Yes. The mating surfaces are subjected to serrations, and they are engaged so that they do not shift vertically.

  In the natural ventilation window 1, as shown in FIG. 8, a pulley 9 is provided at a vertical frame position on the upper side of the vertical arm pivot point C of the lower arm 5, and one end is disposed on the lower side. One end of the spring member 11 is connected to the other end of the wire 10 on which the arm 9 is anchored to the longitudinal pivot point C of the arm 5 and the pulley 9 is wound, and the other end of the spring member 11 is positioned in the vertical direction. It is connected to a vertical position adjustment mechanism 12 that can be adjusted. The spring member 11 functions as a tension spring, and is a force that closes the shoji 3 along the wire direction to the longitudinal pivot point C of the lower arm 5 via the wire 10 according to the opening degree of the shoji 3. A pulling force P is applied.

  The vertical position adjusting mechanism 12 includes a feed screw member 13 arranged in the vertical direction, a nut-like member 14 screwed to the feed screw member 13, and a slide member 15 that moves together with the nut-like member 14. A feed screw mechanism is provided, and the other end of the spring member 11 is connected to the slide member 15. The slide member 15 has a through-hole through which the feed screw member 13 penetrates in the vertical direction, and has a structure in which the nut-like member 14 is rotatably held in a lateral groove crossing the through-hole. By rotating the member 14 manually, the member 14 moves up and down together with the nut-like member 14 so that the pulling force P can be adjusted.

  On the other hand, an anti-turn device 17 is provided for the lower frame 2B of the window frame 2. As shown in FIG. 10, the anti-turn device 17 includes a lower frame side metal fitting 18 fixed to the lower frame 2B of the window frame 2, a lower metal side metal fitting 19 fixed to the lower frame 3B of the shoji 3, It consists of an arm member 20 that connects them. The lower frame side metal fitting 18 starts opening a window so that the slide guide 23, the fixing metal fittings 21 and 22 to the lower frame 2B provided at both ends of the slide guide 23, and the slide guide 23 are fitted externally. The first spring member 24 provided at the side end portion, the second spring member 25 provided at the end portion of the opening window end side so as to fit the slide guide 23, and the slide guide 23 are engaged. The slider 26 is movable along the slide guide 23 and includes a slider 26 disposed between the first spring member 24 and the second spring member 25. The lower heel side metal fitting 19 includes a fixing metal fitting 28 for the lower heel 3B and a coil spring 30 interposed between the arm member 20 and the lower heel side metal fitting 19. One end of the arm member is pivotally attached to a slider 26 of the lower frame side metal member 18 by a shaft member 27, and the other end is provided with a coil spring 30 with respect to the fixed metal member 28 of the lower heel side metal member 19. It is pivotally mounted with a pivot therebetween. The coil spring 30 is for absorbing a height difference generated between the lower collar 3B and the lower frame 2B in accordance with the opening of the window.

[Operation explanation of shoji 3]
(Closed window of shoji 3)
In the closed window state shown in FIGS. 11 and 12, the upper arm 4 is centered on the vertical frame side pivot point B by the shoji weight w (W / 4) acting on the vertical axis pivot point A. As a result, a moment M ₁ (w · S ₁ ) for rotating the upper arm 4 outward is generated. Further, in the lower arm 5, because it is oriented vertically, or on the contrary to the upper arm, the downside pivot point (upper side) is slightly inclined to the indoor side, No moment is generated in the lower arm 5 or only a moment in the direction of turning in the room is generated. The moment M ₁ generated in the upper arm 4 acts as a force in a direction in which the lower arm 3B side of the shoji 3 is closed around the longitudinal arm pivot point C of the lower arm. 3 alone has a structure that holds the closed state. The shoji 3 is kept locked by the shoji opening / closing device 40.

(Opening operation of shoji 3)
As shown in FIGS. 13 and 14, when the shoji is unlocked by the shoji opening / closing device 40, the anti-spinning device 17 causes the first spring member 24 to urge the slider 26 toward the shoji opening direction. The shoji 3 starts to open when the arm member 20 is projected. Along with this, the lower arm 5 tilts outward, and an opening direction moment M ₂ (w · S ₂ ) that causes the shoji 3 to rotate outward is also generated in the lower arm 5. In addition, a closing direction moment M ₄ (P · S ₄ ) that causes the shoji 3 to close in the direction of closing the shoji 3 by the wire tension P is generated at the downside pivot point C of the lower arm 5. Further, when the center of gravity K of the shoji 3 moves to the outdoor side from the vertical pivot point C of the lower arm 5, a closing moment M ₃ (W · S ₃ ) that acts in the closing direction of the shoji 3 is generated. Occur.

The increasing rate of the moment M ₂ of the lower arm 5 is larger than that of the upper arm 4 due to the long arm length, and becomes a predetermined opening (L1), and the relationship of M ₂ > M ₁ + M ₃ + M ₄ is established. Then, the force in the direction in which the shoji 3 is opened further exceeds the force in the closing direction, and the shoji 3 automatically starts to open the window. At this stage, the slider 26 of the anti-turn device 17 is separated from the first spring member 24. Therefore, the push-out amount of the shoji lower heel 3B by the curling prevention device 17 is preferably set to an amount with a slight margin at the position where the shoji 3 starts to automatically open.

(Balance state of shoji 3)
As shown in FIGS. 15 and 16, when the shoji 3 starts to automatically open and reaches a predetermined opening (L2), the closing direction moments M ₁ , M ₃ , M acting in the direction to close the shoji 3 are closed. ₄ increases and balances with the opening direction moment M ₂ which acts in the direction which opens the shoji 3. That is, ΣM _1-4 = 0 and the stationary state is maintained in an equilibrium state in which the force is balanced.

  After that, in this stationary state, the opening degree is automatically adjusted by the wind pressure from the outside or inside of the shoji 3. That is, when wind pressure (positive pressure) is applied from the outside, the shoji 3 rotates in the closing direction, and the amount of air flowing in is reduced by narrowing the opening of the shoji 3. After that, when the windless state is reached, the shoji 3 returns to the original opening. Further, when the negative pressure increases or the airflow from the indoor side increases, the shoji 3 rotates in the opening direction, and the amount of air flowing in is increased by increasing the opening of the shoji 3. Thereafter, when the air flow decreases or no negative pressure is applied, the shoji 3 returns to the original opening.

  Further, even if the shoji 3 is closed by a gust of wind in a natural ventilation state, the slider 26 collides with the first spring member 24, and the impact force is alleviated and absorbed, so that the impact and impact sound are alleviated. At the same time, the first spring member 24 pushes the lower arm 3B of the shoji 3 outward, so that the shoji 3 returns to its original opening.

  Further, even when the shoji 3 is squeezed in the opening direction in the natural ventilation state, the impact force is relieved and absorbed by the second spring member 25, so that the impact and impact sound are relieved.

(Close operation of shoji 3)
When the shoji 3 is desired to be closed from the open state, the lower arm 3B of the shoji 3 is pulled to the window frame 2 side by the shoji opening and closing device 40, and is locked as it is. Examples of the retracting structure include a wire method and an arm method.

[Other examples]
(1) In the above embodiment, a single window has been described. However, the present invention can be similarly applied to a continuous window in which the shoji 3, 3,. In this case, by adjusting the opening degree of the shoji 3 by the vertical position adjusting mechanism 12, each shoji 3, 3, ... can be neatly aligned.
(2) In the natural ventilation window, by adjusting the first spring member 24 and the second spring member 25 with different spring elastic forces and lengths, adjustment of the urging force and adjustment of the operating range of the urging force can be performed. It becomes possible.
(3) In the above embodiment, the shoji opening / closing device 40 opens the shoji 3 from the closed state by pushing the lower arm towards the outside and opens it, and the shoji 3 from the open state to the lower arm Although the closing operation is performed so that the shoji 3 is automatically opened from the closed state, the shoji opening / closing device 40 moves the shoji 3 from the open state. It is good also as an apparatus which performs only the closing operation which draws the lower eyelid side into the window frame side, and makes it a closed state.

[Containment structure of shoji switching device 40]
Since the shoji opening / closing device 40 is provided so as to protrude toward the lower frame or the invisible room side, in this embodiment, the shoji opening / closing device 40 is concealed from the outside by a cover material 41 or the like.

  As shown in FIGS. 2 to 4, a roof plate 42 is provided on the indoor side of the window frame 2 along the circumferential direction so as to protrude toward the indoor side. The cover material 41 is installed on the upper surface of the bottom plate 42 on the lower frame 3B side, and conceals the shoji door opening and closing device 40. The cover material 41 is a U-shaped member composed of a lower surface material 41a, a front material 41b, and an upper surface material 41c, and surrounds the shoji opening and closing device 40, as shown in FIG. Further, end covers 43 and 43 are attached to both end faces of the cover material 41, and the side openings are sealed. The cover material 41 may be an L-shaped member with the upper surface material 41c omitted.

  The cover material 41 and the end cover 43 cover the lower surface, front surface, upper surface, and side surfaces of the shoji opening / closing device 40 so that when viewed from the lower side of the window, the cover material 41 and the end cover 43 protrude toward the lower frame or the invisible indoor side. The provided shoji opening and closing device 40 is not visible and the appearance is improved. Furthermore, it is possible to prevent dust and dirt from attaching to the shoji opening and closing device 40 and insects and the like from entering when the window is opened (in a natural ventilation state).

  Next, FIG. 17 shows a second embodiment. In the second embodiment, a screen door lower end side fixing portion 45 is provided on the upper surface material 41c, and the screen door 44 is provided in a space surrounded by the cover plate. The screen door lower end side fixing portion 45 is obtained by fixing a screen door lower end side fixing metal fitting 46 having an L-shaped cross section with a screw 47 to the upper surface of the outdoor side end portion of the upper surface material 41c. A screen door upper end fixing bracket 48 having an L-shaped cross section is also fixed to the upper side plate 42, and the upper arm 44a and the lower arm 44b of the screen door 44 are respectively connected to the screen door upper end fixing bracket 48 and the screen door lower end fixing bracket 46. Secure with screws.

  By the way, in the case of the continuous window in which the shoji 3, 3,... Are connected in the horizontal direction, as shown in FIG. 18, when the vertical bone 50 is located closer to the outdoor side, the cover material 41 is continuously provided in the horizontal direction. The side openings may be sealed by the end lids 43, 43. As shown in FIG. 19, when the intermediate vertical member is a vertical type, the end cover 43 is attached to one end face of the cover material 41 and the other end face is set to the vertical 51 for the end shoji. The intermediate side shoji may be closed by covering the one end face of the cover material 41 with the side face of the vertical 51 and closing the other end face with the side face of the vertical 51.

  DESCRIPTION OF SYMBOLS 1 ... Window for natural ventilation, 2 ... Window frame, 3 ... Shoji, 4 ... Upper arm, 5 ... Lower arm, 9 ... Pulley, 10 ... Wire, 11 ... Spring member, 12 ... Vertical position adjustment mechanism, 13 ... Feed screw member, 14 ... Nut-like member, 15 ... Slide member, 17 ... Anti-turn device, 18 ... Lower frame side metal fitting, 19 ... Lower heel side metal fitting, 20 ... Arm member, 23 ... Slide guide, 24 ... First spring Member, 25 ... second spring member, 26 ... slider, 40 ... shoji opening and closing device, 41 ... cover material, 42 ... girdle, 43 ... end cover, 44 ... screen door, 45 ... screen door lower end side fixing portion

Claims (2)

A window frame attached to the outer wall of the building, and the lower wing side that is housed in this window frame rolls outward and opens, and maintains a stationary state in an equilibrium state where the force is balanced when the window is opened. In the natural ventilation window consisting of a shoji that automatically adjusts the opening degree by the wind pressure from the outside or inside from
At the lower frame of the natural ventilation window or on the inside of the room, a shoji opening / closing device for opening the shoji from the closed state to the open state and / or closing from the open state to the closed state is attached.
A cover material for covering the upper surface, the lower surface and the front surface of the shoji switching device is attached, and end covers are attached to both end faces of the cover material to conceal the shoji switching device and cover the upper surface of the shoji switching device. A natural ventilation window characterized in that a fixed part on the lower end side of the screen door is provided on the material . A window frame attached to the outer wall of the building, and the lower wing side that is housed in this window frame rolls outward and opens, and maintains a stationary state in an equilibrium state where the force is balanced when the window is opened. In the natural ventilation window consisting of a shoji that automatically adjusts the opening degree by the wind pressure from the outside or inside from
At the lower frame of the natural ventilation window or on the inside of the room, a shoji opening / closing device for opening the shoji from the closed state to the open state and / or closing from the open state to the closed state is attached.
A cover material for covering the upper surface, the lower surface and the front surface of the shoji switchgear is attached, and an end lid is attached to one end face of the cover material or is closed by a side face, and the other end face is a side face. A window for natural ventilation, characterized in that it is closed with a cover , conceals the shoji switching device, and a fixing portion on the lower end side of the screen door is provided on the upper surface material covering the upper surface of the shoji switching device .

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