JP2003003757A - Double-sliding, foldable and openable/closable sash - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a double sliding sash door, which is stored in a sash frame, to be easily and surely folded and opened/closed. SOLUTION: The sash door 10 is opened/closed in a double-sliding manner by making a door end stile 11, a meeting stile 12 and an intermediate coupling frame 14 put in a state of being engaged with guide rails 24 of upper and lower frames 21 and 23; a vertical frame 27 has an internally and externally double structure in an in-plane direction; an inside vertical frame 28 is opened to allow the sash door 10 to be moved to an outside vertical frame 29; the coupling frame 14 reaches a notched part 25 provided in the guide rail 24, when the sash door 10 is moved; and engagement of the coupling frame 14 is released so as to make the sash door 10 foldable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sash which can be selectively folded and opened and which can be selectively opened and closed and folded and opened.

[0002]

2. Description of the Related Art The inventor of the present invention has disclosed that, according to Japanese Patent Application No. 2000-91376, a sash door is rotated between a door end frame and a combination frame and an intermediate connecting frame between these frames. It is configured to be foldable by a partition panel that is freely installed, and the door rails and fitting frames of the sash door are constantly engaged with the guide rails installed on the upper and lower frames of the sash frame, and the intermediate connecting frame is attached to the guide rails. By engaging and disengaging at the intermediate position in the longitudinal direction, both opening and closing of the sash door with the intermediate coupling frame engaged and opening and closing of the sash door with the engagement released can be freely performed. I have already proposed a sash.

At this time, according to the embodiment, the engagement and disengagement of the intermediate connecting frame with respect to the guide rail is performed by using a locking device such as a clemon bolt and a lever handle installed in the intermediate connecting frame and operating the locking device. This is done by vertically moving an L-shaped slider installed on the indoor side of the intermediate connecting frame with respect to the guide rail.

In this case, there are two types of opening / closing by pulling and opening / closing by folding.
Can be selectively opened and closed,
While ensuring sash performance such as airtightness as a double sash, it can be used as a full-open sash that fully opens the window by folding and opening the sash door. When you engage and disengage the frame from the guide rail,
The problem remains that the engagement / disengagement means of the intermediate connecting frame tends to be mechanically complicated.

The present invention has been made in view of the above circumstances, and a problem to be solved by the present invention is to make it possible to secure the sash performance such as airtightness and the structure of the intermediate connecting frame which can be easily engaged and disengaged. The purpose of this is to provide a sash that can be opened and closed by double folding, which can be surely achieved.

[0006]

According to the present invention, the vertical frame of the sash frame has an inner-outer double structure in the in-plane direction (may be referred to as the opening width direction) and the inner longitudinal direction. By opening the frame, the sash door can be moved to the outer vertical frame through the position of the inner vertical frame, and the sash door is engaged with the guide rail corresponding to the position of the intermediate connecting frame in the moved state. By disposing a notch for removal and engaging and disengaging the intermediate connecting frame at the notch, it is possible to reliably engage and disengage the intermediate connecting frame with a simple structure, and a pulling state. By disposing the notch and the intermediate connecting frame at positions where the intermediate connecting frame cannot reach, the possibility of malfunction such as the sash door being accidentally folded is eliminated, while the inner vertical The frame is a vertical frame, and the sash door is pulled up. In this state, the airtightness can be ensured between the door frame and the door frame, and the engagement and disengagement of the intermediate connecting frame is displaced from the fixed position of the intermediate connecting frame when the sash doors are closed by sliding to the vertical frame side. When the sash door is pulled up, the intermediate connecting frame is always kept engaged with the guide rail and the airtightness between the sash door and the guide rail can be secured without swinging. That is, the invention according to claim 1 is obtained by folding the sash door with a door end frame and a combination frame, and a partition panel rotatably installed between these frames through an intermediate connecting frame. If possible, the guide rails installed on the upper and lower frames of the sash frame are always engaged with the above-mentioned door end frame and summing frame of the sash door, and the above-mentioned intermediate connecting frame is arranged on the guide rail or in parallel therewith. Intermediate position on the guide rail in the longitudinal direction A sash capable of both opening and closing the sash door with the intermediate coupling frame engaged by engaging and disengaging freely and folding and opening and closing the sash door with the engagement released. The vertical frame of the sash frame has an in-plane double structure in the in-plane direction by an inner vertical frame on the inner side in the guide rail longitudinal direction and an outer vertical frame on the outer side, and the sash door is opened by opening the inner vertical frame. From the position to the outer vertical frame position, the intermediate frame can be engaged and disengaged from the guide rail by moving the sash door from the fixed position of the intermediate frame in the closed state in which the sash door is closed. A foldable sash that is freely folded and folded, characterized in that it can be freely moved by receiving or withdrawing the intermediate connecting frame with respect to the notch portion of the guide rail arranged at the position displaced to the side. is there.

In addition to the above, the invention according to claim 2 is,
In order to make it possible to switch the sash doors by pulling them and switching between folding and opening and closing by a simple operation, the inner vertical frame is opened in the vertical frame having the double structure in the in-plane direction and the inner vertical frame is opened and closed in the sash frame. The sash door can be moved to the outer vertical frame position by arranging the inner vertical frame so that the inner vertical frame can be opened and closed with respect to the outer vertical frame. It is a sash that can be folded and folded.

According to a third aspect of the present invention, in addition to the above, the relationship between the sash frame and the sash door is constructed by using a protruding rail like the general sash as much as possible. In order to make it possible to apply the airtight means used for the sash and to easily secure the airtightness of the sash, the guide rail for engaging and disengaging the intermediate connection frame is projected in the opposite direction to the upper and lower frames. The sash according to claim 1 or 2, wherein the sash is a protruding rail installed so as to be opened and closed.

In addition to the above, in the invention according to claim 4, the projecting rail is always engaged with the door frame and the summing frame so that the projecting rail can have a preferable form. The guide rail is a protruding rail that engages with the top and bottom of the door frame and the fitting frame that are installed to project in opposite directions on the upper and lower frames, and the guide rail that engages and disengages the intermediate coupling frame is a protrusion that constantly engages these upper and lower frames. A sash that can be opened / closed by folding in a sliding manner according to claim 1, 2 or 3, wherein the sash is a rail, and the guide rails of the door stile, the summing stile, and the intermediate connection frame are common protruding rails. is there.

In addition to the above, in the invention according to claim 5, the sash door is preferably hung on the sash frame so that the sash door can be folded and opened as stably and reliably as possible. The sash is additionally provided with a suspension member rail for guiding the suspension member projecting upward at the upper end of the door frame and the summing frame with the upper frame parallel to the projecting rail. 5. The sash according to claim 4, wherein the door is hung on and supported by an upper frame to constitute a sash.

According to a sixth aspect of the present invention, in addition to the above, an airtight means is disposed between the sash frame and the sash door to ensure the airtightness of the sash.
The fold folding open / close according to claim 1, 2, 3, 4 or 5, wherein an airtight means is arranged between the inner vertical frame, the upper frame and the lower frame of the sash frame and the sash door. It is a free sash.

The present invention provides these as means for solving the above problems as the gist of the invention.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below with reference to the examples of the drawings. A is a sash that can be folded and folded to be opened and closed by sliding, and the sash A has a sash door 10 and a front end frame 1.
1 and the summing frame 12, and a partition panel 13 rotatably installed between these frames 11 and 12 via an intermediate connecting frame 14 so as to be foldable.
The door rail 11 and the fitting rail 12 of the sash door 10 are constantly engaged with the guide rail 24 installed on the guide rail 24, and the intermediate connecting frame 14 is attached to the guide rail 24 or another guide rail arranged in parallel with the guide rail 24. Both the opening and closing of the sash door 10 with the intermediate coupling frame 14 engaged and the folding and opening of the sash door 10 with the engagement disengageably engaged at the intermediate position in the longitudinal direction. In this example, the sash door A has two sash doors 10 arranged on the sash frame 20 so that the sash doors 10 can be opened and closed by opening and closing the sash doors 10. The sash for an armrest window or a terrace window made of, for example, aluminum or a composite material of aluminum and resin, wood or the like is configured as described above.

In this example, the sash door 10 is a doorframe 1
1, a combination frame 12, a plurality of partition walls 13 having the same width, for example, two partition panels 13 having the same width, and an intermediate connecting frame 14, and the door end frame 11 and the combination frame 12 are arranged at both ends in the width direction between them. The partition panel 13 is rotatably connected to the hinge 16, and the intermediate connection frame 14 is also rotatably connected to the hinge panel 16 between the partition panels 13. The two sash doors 1 are
The height of 0 is higher on the outside of the room and slightly lower on the inside of the room. The sash door 10 is attached to the sash frame 20, and the door end frame 11, the summing frame 12, and the intermediate connecting frame 14 are provided. Sash door 1
By engaging the guide rail 24 for 0, the sash door 10 can be opened and closed as a single extended sliding door, and the door end frame 11 and the summing frame 12 can be engaged with the guide rail 24. On the other hand, by releasing the engagement of the intermediate connection frame 14, the intermediate connection frame 14 is made to escape in the crossing direction of the guide rails 24, and the sash door 10 is placed on the outdoor side or the outside with reference to the door frame 11 and the combination frame 12. The interior of the room is made to be able to be folded and opened in a V shape so as to be opened and closed. At this time, the above-mentioned hinge 16 connection of this example includes the door end frame 11, the fitting frame 12, the partition panel 13, and the intermediate connection frame 14. One bearing, which is integrally or integrally installed at the connecting end of the, and the other shaft are fitted so as to be freely rotatable by ¼ circle, and the total length is set in the longitudinal direction of the connecting end, that is, in the vertical direction. , For example, aluminum extruded material And by entirely hinges etc., also while connecting hinge 16 by, the hinge 16
The airtightness of the portion is secured to a high degree, and the sash door 10 is made highly airtight.

The sash frame 20 includes a top frame 21, a bottom frame 23, and left and right vertical frames 27 to form a rectangular opening.
1 and a plurality of inner and outer guide rails 24, for example, two inside and outside, which are necessary for opening and closing the sash door 10 on the lower frame 23 and the sash door 10.
Are arranged, and the sash doors 10 of the sash doors 10 are engaged by engaging the door frame 11, the fitting frame 12, and the intermediate connecting frame 14 of each sash door 10.
The sash door 10 can be folded and opened by releasing the engagement of the intermediate coupling frame 14 and guiding the opening and closing of the sash door. The guide rail 24 of 23 is a projecting rail installed on the upper and lower frames 21 and 23 so as to project in the opposite direction, and the projecting rail includes the door frame 11, the summing frame 12 and the intermediate frame. The connecting frame 14 has a common protruding rail, and the door frame 11 and the fitting frame 12 are constantly engaged with each other, and the intermediate connecting frame 14 is engaged and disengaged. At this time, the upper frame 21 has the protruding rail. By further including a suspending member 17 protruding upward from the upper end of the door frame 11 and the summing frame 12 in parallel with 24, in this example, a suspending member rail 22 for guiding a suspending roller. The sash door 10 is supported by an upper frame 21 so as to be suspended from the upper frame 21. In this example, the rails 22 and 24 are provided with a shallow groove above and inside the upper frame 21 formed in a downward U shape. The pair of inner and outer hanging member rails 22 are arranged horizontally in a stepped manner in which the inside and the outside of the hanging member 22 are raised and the inside of the hanging member is slightly lowered. Similarly, the protruding rails 24 are formed in the same shape as the inner and outer steps to be arranged in parallel and in the same length as the hanging member rails 22, while the lower frame 2 is formed in a step-like shape that is directed upward from the outdoor side toward the indoor side.
A pair of inner and outer projecting rails 24 are arranged in the same horizontal and inner positions as the projecting rails 24 of the upper frame 21 on each horizontal part of 3, and the pair of inner and outer projecting rails 24 are arranged in an inner and outer stepped shape in which the outdoor side is low and the indoor side is slightly high. It has been done.

The vertical frame 27 of the sash frame 20 has a double structure in the in-plane direction inside and outside by an inner vertical frame 28 on the inner side in the longitudinal direction of the guide rail 24 and an outer vertical frame 29 on the outer side. By opening 28, the sash door 10 can be moved from the inner vertical frame 28 position to the outer vertical frame 29 position, and the interlocking of the intermediate connecting frame 14 with respect to the guide rail 24 is performed by closing the sash door 10 by sliding. In this state, the intermediate connecting frame 14 is received or released from the cutout portion 25 of the guide rail 24 arranged at the position displaced toward the vertical frame 27 side with the movement of the sash door 10 from the fixed position. The inner vertical frame 28 of this example is arranged so as to be openable and closable with respect to the outer vertical frame 29. There as those movable to the side vertical frame 29 position.

In this embodiment, the left and right vertical frames 27 have a double structure in the in-plane direction inside and outside, and the inner vertical frame 28 is opened so that the sliding sash doors 10 can be moved to the positions of the outer vertical frames 29, respectively. The notch 2 at the position where the engagement and disengagement of the intermediate connection frame 14 of each sash door 10 is displaced to the left and right vertical frame 27 sides arranged on the plurality of inner and outer guide rails 24.
5 and by disposing the inner vertical frames 28, the space between the inner vertical frames 28 is set to the sash door 1 described above.
The sash door 10 is slid in the width direction between the inner vertical frames 28 as a 0-pitch opening / closing area so that the delta-opening / closing operation can be performed.

At this time, the outer vertical frame 29 is used for the frame of the sash frame 20 that forms the frame of the sash frame 20 by fixing the upper and lower ends of the upper frame 21 and the lower frame 23 in the longitudinal direction to the upper and lower ends in the longitudinal direction. On the other hand, the inner vertical frame 28 is arranged as a vertical frame for the sash door 10 by arranging it.
Airtightness can be secured between the sash door 10 and the door frame 11 of the sash door 10 when the sash door 10 is closed, that is, when the sash door 10 is opened and closed by sliding.

The inner vertical frame 28 of this example is the outer vertical frame 29.
The hinge 30 is connected to the hinge 30 so that it can be freely opened and closed. In this example, the hinge 30 is connected to the sash door 10
The inner vertical frame 28 is rotatably provided on one side of the outer vertical frame 29 opposite to the folding opening / closing direction, such that the inner vertical frame 28 is opened and closed, for example, like a door.
As in the sash door 10, the 0-connection is made by a full-length hinge made of aluminum or the like by making the entire length in the longitudinal direction an integral body or an integral bearing and a rotatable fitting of a shaft. In this example, the hinge 30 of the inner vertical frame 28 is connected inside the room, and the inner vertical frame 28 is opened and closed.
9 is performed at an angle of 1/4 circle.

On the other hand, the guide rail 24, the notch 25 of the protruding rail in this example, opens the inner vertical frame 28, and in this example, the hinge 30 opens the sash door 10. The width corresponding to the movement width to move to the position of the outer vertical frame 29 is set from the fixed position of the intermediate coupling frame 14 to the vertical frame 2
The guide rails 24 of the upper frame 21 and the lower frame 23 displaced so as to move to the 7 side are arranged at the positions of the projecting rails in this example by cutting out so as to partially lack them. The notch 25 is adapted to engage and disengage the intermediate connecting frame 14, and the engaging and disengaging is a guide rail installed by being fitted to the intermediate connecting frame 14 in this example, for example, the upper and lower ends of its hollow portion. Guide member 15 for engagement,
For example, a resin-made slush can be freely moved in and out of the room, and the above-mentioned receiving or escaping can be performed.

In the figure, 18 is a crescent for locking the sash frame 12, 19 is a handle for opening and closing each sash door 10, 26 is a left and right separated arrangement on the upper frame 21 of the sash frame 20, and the folding and opening of the sash door 10 is performed. So as not to hinder the sash door 10 from interlocking with the movement of the sash door 10 to the outer vertical frame 29, for example, by a link mechanism, the slope is raised and the sash door 10 is tilted and lowered in the opposite direction in conjunction with the return. An elevating cover for ensuring watertightness at 21 and 31 at the inner vertical frame 2 of the sash frame 20.
8 shows the airtight means arranged between the upper frame 21, the lower frame 23 and the sash door 10.

By constructing the sash door 10 and the sash frame 20 in this way, the door frame 11 of the sash door 10 is formed.
The upper frame of the sash door 10 is arranged so that the suspension member 17 by the suspension rollers of the combination frame 12 is placed on the suspension member rail 22 so as to guide the suspension member 17 by the suspension member rail 22 in its longitudinal direction. It is suspended and supported on 21 and the above-mentioned door frame 11, combination frame 12, and intermediate connecting frame 1
The upper and lower ends of the sash 4 are engaged with the guide rails 24 of the upper and lower frames 21 and 23, in this example, the projecting rails, through slashes similar to those of the intermediate connecting frame 14 installed on them. The door 10 is arranged so as to be pulled over the sash frame 20 to form the sash A.

The sash A of the present embodiment selectively enables two types of opening and closing, one of which is a sliding opening and the other of which is a folding opening and closing, which enables a full opening of the window opening and a vertical frame 27 of the sash frame 20 within a plane. By forming the inner and outer double structures in the direction and opening the inner vertical frame 28, the sash door 10 can be moved to the outer vertical frame 29 position by passing through the inner vertical frame 28 position. By disposing the notch 25 for engagement and disengagement on the guide rail 24 corresponding to the position of the intermediate coupling frame 14 in the moved state, and engaging and disengaging the intermediate coupling frame 14 at the notch 25, The engagement and disengagement of the intermediate connecting frame 14 can be surely performed by a simple structure, and the cutout portion 25 and the intermediate connecting frame 14 are pulled in the pulled state.
By arranging and shifting the intermediate connecting frame 14 to a position where the intermediate connecting frame 14 cannot reach, the possibility of malfunction such as the sash door 10 being mistakenly folded is eliminated, while the inner vertical frame 28 serves as a door-contact vertical frame. The airtightness can be secured between the sash door 10 and the door sill 11 when the sash door 10 is pulled, and the interlocking of the intermediate connecting frame 14 is performed by fixing the intermediate connecting frame 14 when the sash door 10 is closed by sliding. By displacing the sash door 10 toward the vertical frame 27 side by moving the sash door 10, the sash door 10 swings while the intermediate connecting frame 14 is always kept engaged with the guide rail 24 when the sash door 10 is pulled backward. The airtightness can be secured between the guide rail 24 and the inner vertical frame 28 so that the inner vertical frame 28 can be opened and closed freely on the outer vertical frame 29. Switching The sash frame 20 and the sash door 10 are configured with a protruding rail in the same manner as a general pull sash as much as possible so that the airtight means used for the pull sash can be It can be applied, and the airtightness of the sash can be easily ensured. By making the protruding rail common to the door end frame 11, the summing frame 12 and the intermediate connecting frame 14,
It is possible to make these engagements as simple as possible to ensure airtightness, and by making the sash A a top hanging sash, the folding and opening of the sash door 10 is as stable and reliable as possible. It can be done at any time.

Although the illustrated example is as described above, the inner vertical frame in the vertical frame having the double structure of the inner and outer sides should be detachably installed to the sash frame, for example, the outer vertical frame and the upper and lower frames. When the inner vertical frame is to be opened and closed by, for example, removing and opening it, and then attaching it, the shutter-like one that is folded and stored with respect to the outer vertical frame By so doing, it is configured to be stored and opened, and pulled out to form the door-stop vertical frame, and when the inner vertical frame is opened and closed by using the above-mentioned full-face hinge, the full-face hinges are arranged in two lines. To allow rotation of 1/2 circle, and to accept or disengage the intermediate coupling frame, for example, in the partial notches formed on the fins on one of the inside and outside of the groove rail in the same manner as above. By Including the like that way Nau, the practice of the present invention, the sash door, the door leading stile, 召合 stile, partition panel, the intermediate connecting frame, sash frame, the upper frame,
Lower frame, guide rail, engagement of the guide rail with the above-mentioned door end frame, joining frame, intermediate connecting frame, and disengagement of intermediate connecting frame,
Vertical frame, outer vertical frame, inner vertical frame, opening means for them, protruding rails used as necessary, rails for hanging members, airtight means, etc., specific structures, shapes, materials, numbers, dimensions, and their relationships, Additions to these can be made in various forms without departing from the spirit of the invention.

[0025]

Since the present invention is constructed as described above,
In the invention according to claim 1, the vertical frame of the sash frame has an inner-outer double structure in the in-plane direction, and by opening the inner vertical frame, the sash door is passed through the inner vertical frame position and the sash door is extended vertically. A notch for engaging and disengaging is arranged on the guide rail corresponding to the position of the intermediate connecting frame in a state where the sash door is moved so that the intermediate connecting frame can be engaged and disengaged at the notch. By doing so, the engagement and disengagement of the intermediate connecting frame can be surely achieved by a simple structure, and the notch and the intermediate connecting frame are displaced in a pulling state to a position where the intermediate connecting frame cannot reach. The installation eliminates the possibility of erroneous operation such as the sash door being folded accidentally, while the inner vertical frame is used as a vertical frame for the door contact to ensure the airtightness between the sash door and the door sill in the sliding state. To ensure that
In addition, by engaging and disengaging the intermediate connecting frame at a position closer to the vertical frame side by displacing it from the fixed position of the intermediate connecting frame when the sash door is closed by sliding, the intermediate connecting frame is always guided when the sash door is pulled up. The intermediate connecting frame can be secured while keeping the sash door engaged with the rails and ensuring airtightness with the guide rails without swinging the sash door, while ensuring sash performance such as airtightness. It is possible to provide a sash that can be opened / closed by folding and folding so that it can be reliably engaged and disengaged with a simple structure.

In addition to the above, the invention according to claim 2 is:
By arranging the inner vertical frame on the outer vertical frame so that it can be opened and closed freely, it is possible to switch the sash door between the folding and the folding open / close by a simple operation. By using the protruding rail like the differential sash, the airtight means used for the sliding sash can be applied and the airtightness of the sash can be easily ensured.

In addition to the above, in the invention according to claim 3, the relationship between the sash frame and the sash door is formed by using a protruding rail like the general sash as much as possible. The airtight means used for the sash can be applied, and the airtightness of the sash can be easily ensured.

In the invention described in claim 4, in addition to the above, the projecting rail is common to the door end frame, the summing frame and the intermediate connecting frame, so that these engagements are made as simple as possible. Thus, the airtightness can be easily ensured.

In the invention described in claim 5, in addition to the above, in addition to the above, by using the sash as a suspension sash, the folding and opening of the sash door can be performed as stably and reliably as possible.

In addition to the above, the invention according to claim 6 may be such that an airtight means is arranged between the sash frame and the sash door to ensure the airtightness of the sash.

[Brief description of drawings]

FIG. 1 is a rear view of a sash.

FIG. 2 is a cross-sectional view showing a state where a sash door is closed.

FIG. 3 is a cross-sectional view showing a state in which the sash door is pulled open by pulling it.

FIG. 4 is an enlarged cross-sectional view of a state in which the sash door is folded and opened.

FIG. 5 is a partial enlarged cross-sectional view of the sash showing the relationship between the intermediate connecting frame of the sash door and the cutout portion of the guide rail.

FIG. 6 is a vertical cross-sectional view of a sash showing a relationship between a door rail or a combination rail of a sash door and a guide rail.

FIG. 7 is a vertical cross-sectional view of the sash showing the relationship between the intermediate connecting frame of the sash door and the guide rail.

FIG. 8 is a vertical cross-sectional view of the sash showing the relationship between the partition panel of the sash door and the guide rail.

FIG. 9 is a partial vertical cross-sectional view showing the relationship between the cutout portion of the guide rail and the intermediate coupling frame.

[Explanation of symbols]

A sash 10 sash doors 11 doorstiles 12 Summing frame 13 partition panels 14 Intermediate connection frame 17 Hanging member 20 sash frame 21 Upper frame 22 Rails for hanging members 23 Bottom frame 24 Guide rail 25 Notch 27 vertical frames 28 Inner vertical frame 29 Outer vertical frame

Claims (6)

[Claims] 1. A sash door is constructed so as to be foldable by a door frame and a combination frame, and a partition panel rotatably installed between these frames through an intermediate connecting frame, and is installed on the upper and lower frames of the sash frame. The guide rail is constantly engaged with the door end frame and the combination frame of the sash door, and the intermediate connecting frame is detachably engageable with the guide rail or another guide rail arranged in parallel with the guide rail at its longitudinal intermediate position. A sash that allows both opening and closing of the sash door with the intermediate coupling frame engaged by opening and closing, and folding and opening of the sash door with the engagement disengaged. The vertical frame has a double structure in the in-plane direction with an inner vertical frame on the inner side of the guide rail in the longitudinal direction and an outer vertical frame on the outer side, and by opening the inner vertical frame, the sash door is vertically extended from the inner vertical frame position to the outer vertical direction. Move to frame position It is movable and the engagement and disengagement of the intermediate connecting frame with respect to the guide rail is arranged at a position displaced from the fixed position of the intermediate connecting frame in the closed state of the sash door to the vertical frame side with the movement of the sash door. A foldable sash which can be folded and folded freely by receiving or withdrawing the intermediate connecting frame from the cutout portion of the guide rail. 2. The cross-folding according to claim 1, wherein the inner vertical frame is arranged to be openable and closable with respect to the outer vertical frame so that the sash door can be moved to the outer vertical frame position. A sash that can be opened and closed. 3. The cross-folding folding opening / closing according to claim 1, wherein a guide rail for engaging and disengaging the intermediate coupling frame is a protruding rail installed on the upper and lower frames so as to project in the opposite direction. Free sash. 4. A guide rail for constantly engaging the door end frame and the combination frame is a projecting rail which is installed on the upper and lower frames so as to project in the opposite direction. The guide rail for engaging and disengaging the frame is a projecting rail that constantly engages the upper and lower frames, and the guide rails of the door end frame, the summing frame and the intermediate connecting frame are common projecting rails. A sash that can be opened / closed by folding and folding as described in 2 or 3. 5. The sash is additionally provided with a suspension member rail for guiding a suspension member projecting upward on the upper ends of the door frame and the summing frame so that the upper frame is parallel to the projecting rail. The sash according to claim 4, wherein the sash is constructed by supporting a door on an upper frame so as to be suspended from the upper frame. 6. The airtight means is disposed between the inner vertical frame, the upper frame and the lower frame of the sash frame and the sash door, as claimed in claim 1, 2, 3, 4 or 5. A sash that can be folded and folded freely.