JP7084280B2 - Shoji assembly - Google Patents

Description

The present invention relates to a shoji assembly, and more particularly to a shoji assembly having a rail structure.

The building is provided with a shoji assembly that can be opened and closed at the opening, leaving an opening at an appropriate position on the wall during construction for ventilation and daylighting. In the case of a sliding door, a fixed glass shoji and a movable glass shoji are arranged in the outer frame of the opening portion, and the movable glass shoji can be moved along the rail structure to open and close the fixed glass shoji.

Generally, both the fixed glass sash and the movable glass sash are composed of a frame and a glass plate arranged on the frame, and the user can see the outdoor environment through the glass plate of the sash assembly. However, the frame has a certain width, and the viewing area is limited. On the other hand, normally, a screen door is arranged on the outdoor side of the movable glass shoji, but the frame of the screen door also limits the viewing area.

In order to prevent the frame of the fixed glass sash and the frame of the screen door from limiting the viewing area, the present invention provides a sash assembly capable of increasing the area ratio occupied by the glass plate.

The shoji assembly of the present invention includes an outer frame, a movable shoji (for example, a movable glass shoji), a fixed shoji (for example, a fixed glass shoji), and a ventilation shoji (for example, a screen door). The outer frame includes a rail structure and a vertical column arranged in the rail structure and having an internal contraction portion. The movable shoji is movably connected to the rail structure and moves along the rail structure to open and close. The fixed shoji includes a first inner frame fixed to the outer frame and a first light transmitting plate (for example, a glass plate) arranged in the first inner frame, and the lower frame of the first inner frame. The portion is shielded by a rail structure, and the lower end of the first light transmitting plate is located in the lower frame portion of the first inner frame. The ventilation sash is placed in the outer frame and partially hidden in the internal contraction.

The sash assembly of the present invention includes an outer frame, a fixed sash, a movable sash, and a ventilation sash. The outer frame includes a rail structure and a vertical column arranged in the rail structure and having an internal contraction portion. The fixed shoji is fixed to the outer frame. The movable shoji is movably connected to the rail structure and moves along the rail structure to open and close. The ventilation sash is placed in the outer frame and partially hidden in the internal contraction.

As described above, by providing the lower frame portion of the first inner frame of the fixed shoji so as to be shielded by the rail structure, the lower frame portion of the first inner frame does not occupy the viewing area above the rail structure. Therefore, the ratio of the area occupied by the first light transmitting plate of the fixed shoji increases. Further, as described above, by providing the ventilation sash so as to be partially hidden in the internal contraction portion of the stanchion, it is possible to prevent the ventilation sash from occupying the viewing area inside the stanchion excessively. As a result, the viewing area of the shoji assembly is relatively unrestricted.

In one embodiment of the present invention, the rail structure includes a rail portion and a recessed portion, a movable shoji is movably connected to the rail portion, the recessed portion is adjacent to the rail portion, and is under the first inner frame. The frame portion is arranged in the recessed portion. Due to the design of the recessed portion, the lower frame portion of the first inner frame can be positioned at a position lower than the rail portion, and the lower frame portion of the first inner frame can be shielded by the rail portion. Further, the recessed portion has opposite upper and lower ends, the upper end of the recessed portion and the upper end of the rail structure are aligned, and the depth from the upper end to the lower end of the recessed portion is equal to or higher than the altitude of the lower frame portion of the first inner frame. Is. As a result, it is possible to secure the lower frame portion of the first inner frame so as not to protrude from the recessed portion.

In one embodiment of the present invention, the above-mentioned ventilation obstacle includes a third inner frame and a ventilation net, the ventilation net is arranged in the third inner frame, and the third inner frame is arranged in the outer frame. Partially hidden in the internal contraction. As a result, the third inner frame can be partially shielded by the vertical pillar so as not to excessively occupy the viewing area inside the vertical pillar.

In one embodiment of the present invention, the lower frame portion of the third inner frame is fixed to the rail structure, and the side frame portion of the third inner frame is movably coupled to the lower frame portion of the third inner frame. Then, it moves along the lower frame part of the third inner frame to move away from the vertical column, opens and closes the ventilation obstacle, or moves along the lower frame part of the third inner frame, and at least a part of it is inside the internal contraction part. Hide in and open the ventilation shoji. As a result, when the ventilation sash is open, at least a part of the side frame portion of the third inner frame is shielded by the standing pillar, and the viewing area inside the standing pillar is not excessively occupied.

In one embodiment of the present invention, the side frame portion of the third inner frame has a ventilation sash operation portion, the side frame portion of the second inner frame has a movable sash operation portion, and the ventilation sash is opened. When the ventilation sash operation part is exposed to the outside of the internal contraction part, the movable sash is closed, and the ventilation sash is open, the side frame part of the second inner frame is adjacent to the vertical column and the third inner frame. At least a part of the movable shoji operation part is exposed from the side frame part of the frame. As a result, when the ventilation sash is open, the user applies force to the ventilation sash operation part to make it easier to close the ventilation sash, and when the ventilation sash is open and the movable sash is closed, the user applies force to the movable sash operation part. Adds to make it easier to open the movable shoji.

In one embodiment of the present invention, the ventilation net has a foldable structure, and when the ventilation obstacle is open, at least a part of the ventilation net is folded and stored in the side frame portion of the third inner frame. , Located in the internal contraction. That is, the internal contraction portion of the vertical column has a function of accommodating the ventilation net and the side frame portion of the third inner frame.

In one embodiment of the present invention, the above-mentioned third inner frame includes a fixed portion, the fixed portion is fixed to a vertical column, hidden in the internal contraction portion, and the opposite ends of the ventilation net are the fixed portion and the third inner, respectively. Join to the side frame of the frame. That is, the fixed portion of the third inner frame is shielded by the internal contraction portion of the vertical column and does not excessively occupy the viewing area inside the vertical column.

In one embodiment of the present invention, the above-mentioned ventilation obstacle includes a third inner frame and a ventilation net, the ventilation net is arranged in the third inner frame, and the third inner frame is arranged in the outer frame. At least a part of the lower frame portion of the third inner frame is shielded by the rail structure. As a result, the lower frame portion of the third inner frame does not occupy the viewing area above the rail structure.

In one embodiment of the present invention, the above-mentioned vertical pillar includes a main pillar body and a structurally strengthened pillar body, and the structurally strengthened pillar body is arranged in the main pillar body. As a result, it is possible to avoid a decrease in the structural strength of the vertical column due to having the internal contraction portion. Further, the internal contraction portion is formed in a structurally reinforced pillar body, and the main pillar body has an open end, and the internal contraction portion is exposed by the open end. As a result, a part of the ventilation sash can be stored in the internal contraction portion via the open end of the main prism.

As described above, by providing the lower frame portion of the first inner frame of the fixed shoji so as to be shielded by the rail structure, the lower frame portion of the first inner frame does not occupy the viewing area above the rail structure. Therefore, the ratio of the area occupied by the first light transmitting plate of the fixed shoji increases. Further, as described above, by providing the ventilation sash so as to be partially hidden in the internal contraction portion of the stanchion, it is possible to prevent the ventilation sash from occupying the viewing area inside the stanchion excessively. As a result, the viewing area of the shoji assembly is relatively unrestricted.

It is a perspective view of the shoji assembly which concerns on one Embodiment of this invention. It is sectional drawing along the line AA of the shoji assembly of FIG. FIG. 3 is a cross-sectional view taken along the line BB of the shoji assembly of FIG. FIG. 3 is a cross-sectional view taken along the line CC of the shoji assembly of FIG.

In order to more clearly understand the above-mentioned features and merits of the present invention, examples will be given below and described in detail together with drawings.

FIG. 1 is a perspective view of a shoji assembly according to an embodiment of the present invention. Referring to FIG. 1, the shoji assembly 100 of this embodiment includes an outer frame 110, a movable shoji 120, and a fixed shoji 130. The outer frame 110 is, for example, an aluminum frame. The fixed shoji 130 is, for example, a fixed glass shoji, and is fixed to the outer frame 110. The movable shoji 120 is, for example, a movable glass shoji, which is movably arranged on the outer frame 110 and moves along the direction D1 or the direction D2 with respect to the outer frame 110 and the fixed shoji 130 to open and close the shoji assembly 100. (Fig. 1 shows the closed state). In this embodiment, the shoji assembly 100 is provided, for example, between the indoor environment I and the outdoor environment O.

In this embodiment, the fixed sash 130 of the sash assembly 100 can be coupled to another fixed sash 130'. The sash assembly 100 can form a corner fitting structure together with another sash assembly 100', but the present invention is not limited thereto. Further, in this embodiment, the sash assembly 100 may further include a ventilation sash. The ventilation sash is, for example, a screen door, which is movably arranged on the outer frame 110 and is provided so as to overlap the movable sash 120 in the state of FIG. In order to clarify the figure, the ventilation sash is omitted in FIG. 1, and the ventilation sash is specifically shown in the following figures.

FIG. 2 is a cross-sectional view taken along the line AA of the shoji assembly of FIG. FIG. 3 is a cross-sectional view taken along line BB of the shoji assembly of FIG. Referring to FIGS. 1 to 3, specifically, the outer frame 110 of this embodiment includes a rail structure 112 and a vertical column 114. The movable shoji 120 is movably coupled to the rail structure 112 and can be moved in the direction D1 or the direction D2 along the rail structure 112 to open and close. The ventilation sash 140 (shown in FIG. 3) is arranged on the rail structure 112 of the outer frame 110 and is located on the outdoor side of the movable sash 120. The fixed shoji 130 includes a first inner frame 132 and a first light transmitting plate 134. The first inner frame 132 is, for example, an aluminum frame, and is fixed to the outer frame 110. The first light transmitting plate 134 is, for example, a glass plate, and is arranged in the first inner frame 132. The lower frame portion 132a (shown in FIG. 2) of the first inner frame 132 is shielded by the rail structure 112. The lower end 134a (shown in FIG. 2) of the first light transmitting plate 134 is located in the lower frame portion 132a of the first inner frame 132. Specifically, as shown in FIG. 2, the rail structure 112 blocks the right side of the lower frame portion 132a of the first inner frame 132, so that it is lower when viewed from the right to the left in FIG. The frame portion 132a is shielded by the rail structure 112.

As described above, by providing the lower frame portion 132a of the first inner frame 132 of the fixed shoji 130 so as to be shielded by the rail structure 112, the lower frame portion 132a of the first inner frame 132 becomes the rail structure 112. Since it is possible not to occupy the viewing area above the fixed shoji, the ratio of the area occupied by the first light transmitting plate 134 of the fixed shoji 130 increases. As a result, the viewing area of the shoji assembly 100 can be made relatively unrestricted. The viewing area refers to a region covered by, for example, a first light transmitting plate 134 and in which no other non-light transmitting structure is present, and the user can view through this region.

Specifically, the rail structure 112 includes a rail portion 112a and a recessed portion 112b, as shown in FIGS. 2 and 3. The movable shoji 120 is movably coupled to the rail portion 112a, and the recessed portion 112b is adjacent to the rail portion 112a. The lower frame portion 132a of the first inner frame 132 in the fixed shoji 130 is arranged in the recessed portion 112b. By designing the recessed portion 112b, the lower frame portion 132a of the first inner frame 132 can be positioned at a position lower than the rail portion 112a, and the lower frame portion 132a of the first inner frame 132 is shielded by the rail portion 112a. be able to. Further, the recessed portion 112b has an upper end 112b1 and a lower end 112b2 facing each other. The upper end 112b1 and the upper surface 112e of the rail structure 112 are aligned. The depth from the upper end 112b1 to the lower end 112b2 of the recessed portion 112b can be designed to be higher than the altitude of the lower frame portion 132a of the first inner frame 132. As a result, the lower frame portion 132a of the first inner frame 132 can be prevented from protruding upward from the recessed portion 112b.

In this embodiment, the movable shoji 120 includes a second inner frame 122 and a second light transmitting plate 124. The second inner frame 122 is, for example, an aluminum frame, and is movably connected to the rail portion 112a of the rail structure 112 by a member such as a wheel 120a. The second light transmitting plate 124 is, for example, a glass plate, and is arranged in the second inner frame 122. The wheel 120a is rotatably coupled to, for example, the second inner frame 122 and is mounted on the rail portion 112a. Therefore, the second inner frame 122 can move according to the rolling along the rail portion 112a of the wheel 120a. The reference surface S is set on the same surface as the upper surface 112e of the rail structure 112. The lower end 124a of the second light transmitting plate 124 is located above the reference surface S, and the lower end 134a of the first light transmitting plate 134 is located below the reference surface S. That is, the lower end 134a of the first light transmitting plate 134 is located at a position lower than the upper end of the rail structure 112. Therefore, even if water seeps from the outside to the lower end 134a of the first light transmitting plate 134, the water located at the lower end 134a of the first light transmitting plate 134 does not easily flow upward to the upper end of the rail structure 112. Therefore, it is possible to prevent outside water from entering the room. In the present embodiment, the reference surface S is, for example, the floor surface of the indoor environment I and the outdoor environment O shown in FIG. 1, but the present invention is not limited thereto.

As shown in FIG. 2, the bottom of the outer frame 110 of this embodiment has a drainage port 110a. As a result, the water in the rail structure 112 can be discharged through the drain port 110a, and the water can be prevented from entering the room. Further, the bottom of the outer frame 110 may have a movable lid 110b, and the movable lid 110b covers the drain port 110a to prevent outdoor insects, animals, water or other foreign substances from entering the room. ..

Specifically, the movable lid 110b is designed so that it can be opened only in the outdoor direction, for example. As a result, when the water in the rail structure 112 heads toward the drain port 110a, the movable lid 110b is pushed outward by the flowing water to open, and the water is discharged to the outside. Further, when an outdoor insect, animal, water or other foreign matter pushes the movable lid 110b from the outside of the outer frame 110, the movable lid 110b does not open in the indoor direction, so that the outdoor insect, animal, water or The effect of preventing other foreign substances from entering the outer frame 110 can be realized.

FIG. 4 is a cross-sectional view taken along the line CC of the shoji assembly of FIG. Referring to FIGS. 1 and 4, the vertical column 114 is arranged on the rail structure 112 and has an internal contraction portion 114a (shown in FIG. 4). The ventilation sash 140 is partially hidden in the internal contraction portion 114a. Further, when the movable shoji 120 is closed as shown in FIG. 4, the side wall 114c1 of the vertical pillar 114 blocks a part of the side frame portion 122b in the second inner frame 122, and the side frame portion of the second inner frame 122. 122b is partially hidden in the vertical pillar 114. As a result, the movable sash 120 and the ventilation sash 140 do not excessively occupy the viewing area inside the vertical column 114, and the viewing area of the sash assembly 100 is relatively unrestricted. The viewing area refers to a region covered with, for example, a second light transmitting plate 124 and in which no other non-light transmitting structure is present, and the user can view through this region.

Specifically, the ventilation sash 140 of this embodiment includes a third inner frame 142 and a ventilation net 144. The ventilation net 144 is, for example, a screen door, and is arranged in the third inner frame 142. The third inner frame 142 is, for example, an aluminum frame, which is arranged in the outer frame 110 (shown in FIG. 1) and is partially hidden in the internal contraction portion 114a of the vertical column 114. More specifically, the lower frame portion 142a (shown in FIG. 3) of the third inner frame 142 is fixed to the rail structure 112, and the side frame portion 142b (shown in FIG. 4) of the third inner frame 142 is the third. It is movably connected to the lower frame portion 142a of the inner frame 142 of the above. The side frame portion 142b can move along the lower frame portion 142a of the third inner frame 142 in the direction D1 shown in FIGS. 1 and 4 to separate from the vertical column 114 and close the ventilation sash 140. Further, the side frame portion 142b may move along the lower frame portion 142a in the direction D2 shown in FIGS. 1 and 4, and at least a part thereof may be hidden in the internal contraction portion 114a of the vertical column 114 to open the ventilation sash 140. can. As a result, when the ventilation sash 140 is open, at least a part of the side frame portion 142b in the third inner frame 142 is shielded by the vertical column 114, and the viewing area inside the vertical column 114 is not occupied. In addition, in FIG. 4, the ventilation sash 140 is shown as an open state.

The ventilation net 144 of this embodiment has a foldable structure. When the ventilation sash 140 is opened as shown in FIG. 4, at least a part of the ventilation net 144 is folded and stored in the side frame portion 142b of the third inner frame 142, and is stored in the internal contraction portion 114a of the vertical column 114. Located in. That is, the internal contraction portion 114a of the vertical column 114 has a function of accommodating the ventilation net 144 and the side frame portion 142b. Further, the third inner frame 142 of the present embodiment further includes the fixing portion 142c, and the fixing portion 142c is fixed to the vertical column 114 and hidden in the internal contraction portion 114a. The opposite ends of the ventilation net 144 are coupled to the fixed portion 142c and the side frame portion 142b of the third inner frame 142, respectively, and are folded or unfolded as the side frame portion 142b moves with respect to the fixed portion 142c. be able to. Since the fixed portion 142c of the third inner frame 142 is shielded by the internal contraction portion 114a of the vertical pillar 114, the fixed portion 142c does not occupy the viewing area inside the vertical pillar 114.

On the other hand, as shown in FIG. 3, at least a part of the lower frame portion 142a of the third inner frame 142 is shielded by the rail portion 112a of the rail structure 112, and the lower frame portion 142a is the viewing area above the rail structure 112. Can be prevented from occupying. Specifically, as shown in FIG. 3, the rail structure 112 blocks the right side of the lower frame portion 142a in the third inner frame 142, so that the lower frame is viewed from the right to the left in FIG. The portion 142a is shielded by the rail structure 112. Further, the sash assembly 100 and another sash assembly 100'of this embodiment form a corner fitting structure as described above, and the internal contraction portion 114a of the vertical column 114 of the sash assembly 100 overlaps with another sash assembly 100'. .. Due to this overlapping design, the ratio of the viewing area of the corner fitting structure can be increased.

Referring to FIG. 4, in the present embodiment, the side frame portion 142b of the third inner frame 142 in the ventilation sash 140 has the ventilation sash operation portion 142b1. When the ventilation sash 140 is in the open state as shown in FIG. 4, the ventilation sash operating portion 142b1 is exposed to the outside of the internal contraction portion 114a of the vertical column 114. As a result, when the ventilation sash 140 is open, the user can easily close the ventilation sash 140 by applying a force to the ventilation sash operation unit 142b1.

Similarly, in this embodiment, the side frame portion 122b of the second inner frame 122 of the movable shoji 120 has a movable shoji operating portion 122b1. When the movable sash 120 is closed as shown in FIG. 4 and the ventilation sash 140 is open as shown in FIG. 4, the side frame portion 122b of the second inner frame 122 is adjacent to the vertical column 114, and the third At least a part of the movable shoji operating portion 122b1 is exposed from the side frame portion 142b of the inner frame 142. As a result, when the ventilation sash 140 is opened and the movable sash 120 is closed, the user applies a force to the movable sash operating unit 122b1 to easily open the movable sash 120.

Referring to FIG. 4, in this embodiment, the vertical column 114 includes a main column body P1 and a structurally strengthened column body P2. The main pillar P1 includes a plurality of side walls 114d1, 114d2, 114d3 connected to each other, and a structural strengthening wall 114e surrounded by these side walls 114d1, 114d2, 114d3. Both ends of the structurally reinforced wall 114e are connected to the insides of the opposing side walls 114d1 and 114d3, respectively. The structurally reinforced pillar P2 is arranged between the opposing side walls 114d1 and 114d3, is located in the main pillar P1, and is coupled to the structurally reinforced wall 114e. As a result, it is possible to avoid a decrease in the structural strength of the vertical column 114 due to having the internally contracted portion 114a.

The internal contraction portion 114a of this embodiment is formed on the structurally reinforced pillar P2. Specifically, the structurally reinforced pillar P2 includes a plurality of side walls 114c1, 114c2, 114c3 that are interconnected to each other, and two structurally reinforced walls 114f1, 114f2 that are interconnected to each other. The two structurally reinforced walls 114f1 and 114f2 are connected to the inside of both side walls 114c1 and 114c2, respectively, and the structurally reinforced wall 114f2, a partial section of the side wall 114c2 and the side wall 114c3 form a concave structure, that is, an internal contraction portion 114a. Further, the main pillar P1 has an open end 114b, and the internal contraction portion 114a is exposed by the open end 114b. As a result, a part of the ventilation sash 140 can be stored in the internal contraction portion 114a via the open end 114b of the main pillar P1. The main pillar P1 and the structurally reinforced pillar P2 of the present embodiment are both aluminum pillars, for example, and are combined with each other so as to engage with each other, but the present invention is not limited thereto.

Although the present invention has been disclosed by the above examples, the present invention is not limited thereto. Since a person skilled in the art can make some changes and modifications without departing from the gist and scope of the present invention, the scope of protection of the present invention shall be based on the content specified in the claims.

100, 100'shoji assembly, 110 outer frame, 110a drainage port, 110b movable lid, 112 rail structure, 112a rail part, 112b recess, 112b1 upper end, 112b2 lower end, 112e upper surface, 114 vertical pillar, 114a internal contraction part, 114b opening Edge, 114c1, 114c2, 114c3, 114d1, 114d2, 114d3 side wall, 114e, 114f1,114f2 structural strengthening wall, 120 movable shoji, 122 second inner frame, 122b, 142b side frame part, 122b1 movable shoji operation part, 124th 2 light transmission plate, 124a, 134a lower end, 130, 130'fixed shoji, 132 first inner frame, 132a, 142a lower frame part, 134 first light transmission plate, 140 ventilation shoji, 142 third inner frame , 142b1 Ventilation shoji operation part, 142c fixing part, 144 Ventilation net, D1, D2 direction, I indoor environment, O outdoor environment, P1 main pillar, P2 structural strengthening pillar, S reference plane

Claims (9)

An outer frame including a rail structure and a vertical column arranged in the rail structure and having an internal contraction portion,
A movable shoji that is movably connected to the rail structure and moves along the rail structure to open and close.
A first inner frame fixed to the outer frame and a first light transmitting plate arranged in the first inner frame are included, and the lower frame portion of the first inner frame is shielded by the rail structure. The lower end of the first light transmitting plate is a fixed shoji screen located in the lower frame portion of the first inner frame.
A sash assembly characterized by including a sash that is placed in the outer frame and partially concealed in the internal contraction. The rail structure includes a rail portion and a recessed portion, the movable shoji is movably coupled to the rail portion, the recessed portion is adjacent to the rail portion, and the lower frame portion of the first inner frame is Arranged in the recess, the recess has opposite upper and lower ends, the upper end of the recess is aligned with the upper surface of the rail structure, and the depth from the upper end to the lower end of the recess is The shoji assembly according to claim 1, wherein the rail is equal to or higher than the altitude of the lower frame portion of the first inner frame. The ventilation obstacle includes a third inner frame and a ventilation net, the ventilation net is arranged in the third inner frame, the third inner frame is arranged in the outer frame, and the third inner frame is arranged. The shoji assembly according to claim 1, wherein the lower frame portion of the frame is at least partially shielded by the rail structure. The ventilation sash includes a third inner frame and a ventilation net, the ventilation net is arranged in the third inner frame, the third inner frame is arranged in the outer frame, and the inside contraction portion. The shoji assembly according to claim 1 , wherein the shoji assembly is partially hidden. The lower frame portion of the third inner frame is fixed to the rail structure, and the side frame portion of the third inner frame is movably connected to the lower frame portion of the third inner frame, and the third inner frame portion is movably connected to the lower frame portion. Moves along the lower frame portion of the inner frame to move away from the vertical pillar, opens and closes the ventilation obstacle, or moves along the lower frame portion of the third inner frame, and at least a part of the inner frame is concerned. The sash assembly according to claim 4 , wherein the sash is hidden in a contraction and the sash is opened. The side frame portion of the third inner frame has a ventilation sash operation unit, and the side frame portion of the second inner frame has a movable sash operation unit. When the ventilation sash is open, the ventilation sash When the operation unit is exposed to the outside of the internal contraction portion, the movable sash is closed, and the ventilation sash is open, the side frame portion of the second inner frame is adjacent to the vertical column, and the third The shoji assembly according to claim 5 , wherein at least a part of the movable shoji operating portion is exposed from the side frame portion of the inner frame. The ventilation net has a foldable structure, and when the ventilation obstacle is open, at least a part of the ventilation net is folded and stored in the side frame portion of the third inner frame, and the inside of the internal contraction portion is stored. The sash assembly according to claim 5 , wherein the sash assembly is located in. The third inner frame includes a fixed portion, the fixed portion is fixed to the vertical column, hidden in the internal contraction portion, and the opposite ends of the ventilation net are the fixed portion and the third inner frame, respectively. The shoji assembly according to claim 5 , wherein the shoji assembly is coupled to a side frame portion. The vertical column includes a main column and a structurally reinforced column, the structurally reinforced column is arranged inside the main column, the internal contraction portion is formed in the structurally reinforced column, and the main column is an open end. The shoji assembly according to claim 1 , wherein the sash assembly is characterized by exposing the internal contraction portion by the open end.

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