JP6562796B2 - Wooden sash - Google Patents

Description

  The present invention relates to a wooden sash that has airtightness and copes with aged deterioration, which is regarded as a weak point of a wooden material, and particularly relates to a wooden sash of a draw method.

  After the war, steel sash began to be adopted as a building window from the 1950s. However, aluminum sash, which is easy to maintain and handle after installation, has been popularized instead of steel sash because of the disadvantage that steel sash is heavy and easily rusts. However, since aluminum sash has high thermal conductivity as a metal material in heat insulation, a large temperature difference occurs indoors and outdoors in cold areas such as Hokkaido and Tohoku region, so that openings in windows, verandas, etc. As warm air in the room comes into contact with the indoor side surface of the aluminum sash frame that is used, a phenomenon that water vapor contained in the air is rapidly cooled on the surface of the sash frame and dew condensation occurs frequently. As a result, the wooden frame close to the sash frame may be corroded, or the floor material near the opening may be stained and peeled due to the condensation flow of the sash, causing problems such as peeling of wallpaper around the sash and generation of mold. It was. On the other hand, in March 1999, the Ministry of Construction announced the “Guidelines for Design and Construction on Rationalization of Energy Use for Houses” (Next Generation Energy Conservation Standards) to deal with global warming issues. Among them, the insulation standards for openings such as windows indicate regional classification, specification standards for windows, etc., performance standards (heat transmissibility), etc., and both wooden sashes and plastic sashes are said to have high thermal insulation properties. ing.

  In recent years, wooden sashes have been reconsidered from the viewpoint of dew condensation in metal sashes as described above and the design characteristics required for living spaces. Furthermore, even when comparing the heat flow rates of various sashes according to the next-generation energy saving standards, it is shown that the heat loss of the wooden sash is 20 to 30% less than that of the aluminum sash. Moreover, the high heat insulation performance of the above wooden sashes indicates that no condensation occurs. Furthermore, the texture and texture of timber has made many people understand the gentleness and softness, and there are increasing cases of adopting wooden sashes for schools and public facilities as well as ordinary houses.

  Therefore, when the advantages and disadvantages of the wooden sash window are described again, the advantages of the wooden sash window are firstly excellent in heat insulation. Thermal conductivity is a numerical value representing the ease of heat transfer, but wood is known to be less likely to transfer heat 1500 times compared to aluminum. Secondly, the characteristic shown in the window of the wooden sash is that it is difficult to condense. There are innumerable small holes on the surface of the tree, and it is known that water droplets generated on the surface are difficult to condense because they enter the small holes. On the other hand, the uniform material such as the aluminum sash or the plastic sash does not have a small hole, so that condensation easily occurs. Furthermore, the third advantage of the wooden sash is that it is easy to process. Since the material is wood, it can easily cope with changes in the thickness of the glass, the size of the window, and the design from the change of the cross-sectional shape. On the other hand, the aluminum sash and the plastic sash have a drawback in that a new mold is required each time and a large cost is required for the change.

  On the other hand, the shortcomings of the wooden sash are as follows. First, the first disadvantage is that the raw material is wood, so that it suffers from decay and deterioration over time. This is because moisture penetrates into the wood structure and causes rot. As a preventive measure, a colorant containing a water repellent is used once every 3 to 4 years to protect the surface of wood. It is known to perform repainting. The second disadvantage is that twisting and madness occur. As these preventive measures, it is also known that twisting and distorting can be substantially prevented by sufficiently drying the wood and setting the moisture content to about 10% to 12%. Subsequently, the third disadvantage is that it is combustible. As this improvement measure, methods such as increasing the cross-sectional dimension or improving the fireproof performance by applying a flame-retardant treatment are known.

  Next, wooden sashes are not only energy-saving, but in terms of production energy compared to aluminum sashes, the heat consumption is about 1 / 135th that of aluminum sashes. Wooden sashes are harmful substances such as dioxins even at the disposal stage. From a long-term perspective, from resource development to manufacturing, consumption, and disposal, such as not producing resources, it can be said that promoting the use of wooden sashes also contributes to environmental protection.

  In order to meet the market needs for a new wooden sash having high airtightness by taking advantage of the characteristics of the wooden sash as described above, the inventor according to the present invention has an airtightness as of July 8, 2011. The patent application about the wooden sash by the draw system with the sword is filed, and after examination by the Patent Office, Patent No. 5473999 is obtained.

Furthermore, the inventors of the present invention have continued analysis of the current residential environment and research on wooden sashes. In cases where large foreign wooden sashes have already been installed, the wooden sashes are considerably heavy. As a result, the opening and closing operation of the window is heavy, and the wooden frame shape such as the duck hanging the wooden sash with the passage of time from the installation collapses due to the weight, hindering the opening and closing of the sliding window. We also faced some drawbacks such as tuss. Furthermore, even in Japanese wooden sashes, it has been found that in Japan where humidity is high, deformation and wear deterioration may occur at sliding contact points with wooden sash fences such as sills and ducks due to aging. As a result, in order to solve the above-mentioned problems and drawbacks, the wooden sash disclosed in the above-mentioned Patent No. 5473999 is further improved, specifically, the duck and the sill that are the sliding contact points with the fence of the wooden sash. It was concluded that a new wooden sash that facilitates the opening and closing operation of each shoji is required by improving the sill convexity where the inside and outside shoji slides, while facilitating the maintenance of the projection.

Japanese Patent No. 5473999

  The wooden sash according to the invention of the above-mentioned Patent No. 5473999 is a rectangular wooden support frame composed of a duck, a right vertical frame, a left vertical frame, and a sill, and a frame body is formed by a horizontal gutter and a vertical gutter and mounted with a glass plate A sliding wooden sash comprising a moving frame that is configured to be reciprocated in the left-right direction in the wooden support frame in which the outer and inner pouches configured in a different manner are disposed, and is disposed on the outdoor side. In the summoning part of the outer shoji and the above-mentioned inner shoji arranged on the indoor side, longitudinal grooves are formed in the summit side faces of the vertical fence facing each other, and an aluminum having a concave cross section is formed in the groove. A cover is affixed, and the rubber cover is attached to the aluminum cover so as to abut the summit side of the vertical wall where the bulging tip faces and the bulging tip is opposed to the aluminum cover. The upper recumbency of the outer and inner shoji In two minutes, two convex grooves are formed in the longitudinal direction inside the lower surface of the head, and an aluminum plate and a silicon sponge sheet are attached to the front end surface of the convex grooves, while On the upper surface side of the upper recumbent ridge, a concave duck frame groove is formed and attached to the convex groove, and further, the protruding tip of the rubber packing attached to the lower surface side of the lower recumbent child and the inner recliner Is in contact with the upper surface of drained aluminum that covers the sill and forms two rails on the upper surface side for reciprocally traversing the shingles and the inner shingles. In the part of the right vertical frame and the right vertical fence and the left vertical frame and the left vertical fence when the shoji is closed, a shallow concave groove is formed at the tip of the concave groove formed in each vertical frame, and the aluminum plate and Each vertical spear tip with a silicon sponge sheet attached It was to the gist being.

  Here, according to the wooden sash according to the invention of the above-mentioned Japanese Patent No. 5473999, in addition to the high thermal insulation as the wooden sash, because of the configuration described above, the summoned portion of the vertical rod, the Kamoi and the upper High airtightness and high thermal insulation in the indoor space can be provided by ensuring high airtightness at the contact portion of the heel, the contact portion between the left vertical frame and the left vertical rod, and the contact portion between the right vertical frame and the right vertical rod. There was an effect that.

  However, in the wooden sash according to the above-mentioned Japanese Patent No. 5473999, as described in the disadvantages of the wooden sash in the background art column, it is undeniable that the material is made of wood, so that it suffers from rot and deterioration over time. In addition, as a measure to prevent rot, we have described repainting to protect the surface of wood once every 3 to 4 years with a colorant containing a water repellent, but in environments where the humidity is high, etc. Depending on the deterioration over time, the groove formed in the longitudinal direction on the inner side of the lower surface of the Kamoi will rot, and the rot in the sill below the aluminum rail cover cannot be denied. Furthermore, the outer shoji and inner shoji that can reciprocate in the wooden support frame composed of the duck, the right vertical frame, the left vertical frame, and the sill are mounted on the two convex rails attached to the sill side. The sliding door attached to the lower arm of each shoji slides, but as the wooden sash becomes larger and the weight of the shoji and inner shoji increases, the opening and closing of the shoji is somewhat less smooth. At the same time, they also discovered a problem that the sliding noise between the convex rail and the flat door car becomes large.

  Therefore, the object of the present invention is to solve the above-mentioned problems found by the verification and continuous research on the wooden sash according to the patent No. 5473999 previously disclosed by the present inventors and can be used permanently. It is to provide a new wooden sash.

  The present invention was made to achieve the above object, and a wooden sash according to the present invention includes a rectangular wooden support frame composed of a duck, a right vertical frame, a left vertical frame, and a sill, And a sliding system comprising a moving frame that is configured by forming a frame body by a vertical rod and mounting a glass plate, and a movable frame that is reciprocally moved left and right in the wooden support frame. In the wooden sash, the two guide grooves carved on the lower surface side of the Kamoi have an aluminum guide case with a U-shaped cross section and a rectangular cross section sealed to the guide case. Two convex guide parts composed of wooden guides are attached to the mower through the wooden guide from the lower end of the wooden guide by a plurality of screws, and are attached to the mower. Sill to respond vertically to the guide section The two rail grooves carved on the upper surface side are made of an aluminum rail case having a U-shaped cross section, a wooden rail having a concave and long cross section sealed to the rail case, and the wooden rail. Two convex rail parts composed of aluminum square bars fixed to the recesses of the rails are attached to the sill through the wooden rails and the rail case from the upper surface of the aluminum square bars with a plurality of screws. Is the first gist.

  Furthermore, in addition to the first gist, the wooden sash according to the present invention is slightly separated from the joints of the left downside and right downside in the concave grooves of the upper and lower heels constituting the outer and inner shoji. An aluminum channel may be embedded at each location.

According to the wooden sash according to the present invention, since the convex guide portion is attached to the two guide grooves carved on the lower surface side of the Kamoi with a plurality of screws, the convex guide portion is deteriorated over time. Even if it is corroded by this and obstructs the opening and closing of the external and internal shoji, there is an effect that it can be easily replaced with a new convex guide.

  Next, according to the wooden sash according to the present invention, the projecting rail portion is attached to the two rail grooves carved on the upper surface side of the sill with a plurality of screws, so that it corrodes due to deterioration over time. Even when it is difficult to open and close the outer and inner shoji, there is an effect that it can be easily replaced with a new convex guide.

  Further, according to the wooden sash according to the present invention, the contact surface between the flat door and the sill attached to the lower arm of the external shoji and the inner shoji is attached to the two guide grooves carved on the upper surface side of the sill. By forming the surface of the aluminum square bar fixed to the concave portion of the upper surface of the convex guide portion, the sliding sound generated when the outer and inner sliding members slide on the convex rail portion of the sill slide. There is an effect that it can be reduced.

  Furthermore, according to the wooden sash according to the present invention, the aluminum channel is embedded in the recessed portions of the upper and lower heels constituting the external shoji and the inner shoji at locations slightly separated from the joint portions of the left and right vertical shafts. By doing this, even if it is used for a long time, it is effective in preventing the sticking of the shoji and the shoji.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.

  First, FIG. 1 is a front view of a wooden sash according to the present invention viewed from the outdoor side, FIG. 2 is a front view of a support frame of the wooden sash according to the present invention, and FIG. 3 is a front view of a moving frame of the wooden sash according to the present invention. is there. As shown in the figure, the wooden sash 1 of the present invention has a rectangular support frame 6 composed of a duck 2, a right vertical frame 3, a left vertical frame 4, and a sill 5, and can reciprocate in the left and right directions within the support frame 6. As the movable frame 7, an external shoji 26 and an internal shoji 27 are arranged in a sliding manner. Further, the outer shoji 26 and the inner shoji 27 are each formed with a frame by the left vertical rod 8, the right vertical rod 9, the upper rod 10, and the lower rod 11, and between the left and right vertical rods and the upper and lower ribs. A glass plate 12 is mounted. On the other hand, reference numeral 13 in the figure is a handle 13 and reference numeral 14 is a lock 14. Hereinafter, based on another figure, the description about the structure of the wooden sash which concerns on this invention shall be advanced. The glass plate 12 may be either single plate glass or double layer glass.

Next, FIG. 4 is a plan view of the head according to the present invention, FIG. 5 is a front view of the head according to the present invention, FIG. 6 is a bottom view of the head according to the present invention, and FIG. 7 is a left side of the head according to the present invention. FIG. 8 is a right side view of the head according to the present invention, and FIG. 9 is an AA cross-sectional view of the head according to the present invention. As shown in the figure, two grooves are formed at a predetermined interval on the lower surface side of the duck 2 and a joint convex portion 28 is formed at the end in the longitudinal direction. Further, two convex guide portions 15 are attached to the inside of the lower surface of the Kamoi 2 with a plurality of screws 16 in the longitudinal direction. Here, the convex guide portion 15 is composed of an aluminum guide case 17 having a U-shaped cross section and a wooden guide 18 having a rectangular cross section and a long cross section sealed to the guide case 17. Next, the convex guide portion 15 is fitted into two guide grooves 29 carved on the lower surface side of the Kamoi 2, and penetrates the wooden guide 18 from the lower surface tip of the wooden guide 18 with a plurality of screws 16. It is attached to Shikamoi 2. On the other hand, reference numeral 19 in the figure denotes a boss hole 19, which is provided by boss joining in joining the head 2 to the left vertical frame 8 and right vertical frame 9. Here, the structure in which the wooden guide 18 is sealed to the aluminum guide case 17 is attached to the Kamoi 2 when the wooden guide 18 is corroded due to deterioration over time. It can be easily repaired by replacing it.

  10 is a front view of the left vertical frame, FIG. 11 is a rear view of the left vertical frame, FIG. 12 is a front view of the right vertical frame, FIG. 13 is a rear view of the right vertical frame, and FIG. FIG. 15 is a bottom view showing the joint between the head and the vertical frame. As shown in the figure, the convex and concave portions of the joint convex portion 28 at the longitudinal end of the Kamoi 2 and the concave groove 21 of the left vertical frame 4 and the concave groove 21 of the right vertical frame 3 are engaged with each other and joined by the boss 20 to be supported. 6 is formed. Further, in the figure, the boss hole 19 and the boss 20 are illustrated in two places in the joint between the head 2 and each vertical frame, but the number is limited to two from the viewpoint of increasing the joint strength between the head 2 and each vertical frame. It can be increased as appropriate. In addition, the boss hole 19 shown below each vertical frame relates to joining with the threshold 5 mentioned later. Then, in FIG. 15, an outer shoji 26 and an inner shoji 27 are fitted in the upper convex guide portion 15 of the two convex guide portions 15, and the right vertical frame 3. The groove 21 formed in the longitudinal direction on the joining side is inserted with the distal end portion of the right vertical ridge 9 of the outer cover 26, while the groove 21 formed in the longitudinal direction on the joining side of the left vertical frame 4 In this case, the distal end portion of the left vertical gutter 8 of the inner shoji 27 is inserted, and airtightness as the wooden sash 1 according to the present invention is secured.

  16 is a plan view of the threshold according to the present invention, FIG. 17 is a front view of the threshold according to the present invention, FIG. 18 is a bottom view of the threshold according to the present invention, and FIG. 19 is a right side of the threshold according to the present invention. FIG. 20 is a left side view of the threshold according to the present invention, and FIG. 21 is a cross-sectional view taken along the line BB of the threshold according to the present invention. As shown in the drawing, two convex rail portions 22 are attached to the upper surface side of the sill 5 so as to be perpendicular to the two convex guide portions 15 attached to the above-mentioned duck 2. At the same time, a joint projection 28 is formed at the end in the longitudinal direction. Here, the convex rail portion 22 has an aluminum rail case 23 having a U-shaped section and a long aluminum rail, a wooden rail 24 having a concave and long cross section sealed to the rail case 23, and the wooden rail 24. It is comprised from the aluminum square bar 25 fixed to the recessed part. The convex rail portion 22 is fitted into two rail grooves 30 carved on the upper surface side of the sill 5, and the wooden rail 24 and the rail case 23 are formed from the upper surface of the aluminum square bar 25 by a plurality of screws 16. And is attached to the threshold 5. Furthermore, a boss hole 19 for boss joining the sill 5 to the left vertical frame 8 and the right vertical frame 9 is provided. Here, the wooden rail 24 is sealed to the aluminum rail case 23 as described above, and the aluminum square bar 25 is fixed to the concave portion on the upper surface side of the wooden rail 24, and these components are attached to the sill 5. In the case where the wooden rail 24 is corroded due to deterioration over time, it can be easily repaired by replacing the entire structure. In addition, when the above-mentioned problem of the problem to be solved by the invention is to improve the sill convex part on which the inner and outer shoji slides, the sill convex formed by fixing the aluminum square bar 25 to the concave part on the upper surface side of the wooden rail 24. As a result, it was found that the sliding was extremely smooth and the sliding noise was reduced compared to the case where the flat door slides on the convex rail in the invention according to Japanese Patent No. 5473999. . Here, although the exact mechanism by which the sliding noise is reduced is unknown, the hypothesis of the present inventors is that the generated sliding noise is absorbed by the wooden rail 24. .

  FIG. 22 is a horizontal sectional view showing the structure of the wooden sash according to the present invention, and FIG. 23 is an enlarged view of the summoned portion of the wooden sash in FIG. In the structure of the wooden sash 1 shown in FIG. 22, the fitting of the right vertical frame 3 and the right vertical frame 9 and the left vertical frame 4 and the left vertical frame 8 has already been described, but the right vertical frame 3 is joined. In the groove 21 formed in the longitudinal direction on the side, the distal end portion of the right vertical ridge 9 of the external shoji 26 is inserted, while in the groove 21 formed in the longitudinal direction on the joining side of the left vertical frame 4, The front end portion of the left vertical rod 8 of the shoji 27 is inserted, and airtightness as the wooden sash 1 according to the present invention is ensured. Further, as shown in the drawing, a double glass plate 31 is fitted between the left vertical rod 8 and the right vertical rod 9 for the outside shoji 26 on the outdoor side. Similarly, the double glass plate 31 is fitted between the right vertical rod 9 and the left vertical rod 8 for the inner shoji 27 on the indoor side. Further, the reference numeral 32 in the figure is a glass ridge A type 32, and the reference numeral 33 is a glass ridge B type 33. Here, both of the pushing edge A type 32 and the pushing edge B type 33 are for fixing the double glass plate 31 to the outer obstacle 26 and the inner obstacle 27, but the one of the pushing edge B type 33 is formed in an L-shaped cross section. Then, a slight gap is formed between the glass surface and the gap is filled with silicone sealing packing to improve the airtightness. Further, for the summoning portion of the external shoji 26 and the inner shoma 27, a concave groove 34 is formed in the longitudinal direction of the summing side surface of the right vertical shaft 9 on the indoor side, and the concave groove 34 has a cross-sectional shape. A pinch block 35 made of silicone is attached so that the bulging tip is in contact with the summing side surface of the left-side vertical shaft 8 facing the outdoor side.

  FIG. 24 is a longitudinal sectional view showing the structure of the wooden sash according to the present invention. As shown in the figure, two convex guide portions 15 are attached to the inside of the lower surface of the Kamoi 2, and the convex guide portions 15 are sealed in an aluminum guide case 17 having a U-shaped cross section and the guide case 17. The mounted guide 15 is formed of a rectangular wooden guide 18, and the convex guide portion 15 is fitted into two guide grooves 29 carved on the lower surface side of the Kamoi 2, and the wooden guide 18 is screwed 16. It can be seen that the wooden guide 18 is penetrated from the tip of the lower surface of the head and attached to the Kamoi 2. On the other hand, two convex rail portions 22 are attached to the upper surface side of the sill 5 so as to respond in a vertical direction to the two convex guide portions 15 attached to the above-mentioned Kamoi 2. The rail portion 22 has a U-shaped cross section, an aluminum rail case 23, a wooden rail 24 having a concave cross section sealed to the rail case 23, and an aluminum square bar fixed to the concave portion of the wooden rail 24. 25, and the convex rail portion 22 is fitted into two rail grooves 30 carved on the upper surface side of the sill 5, and the wooden rail 24 and the rail case are mounted from the upper surface of the aluminum square bar 25 with screws 16. It can be seen that it is attached to the sill 5 through 23. Furthermore, the flat door wheel 36, which is housed under the lower arm 11, contacts the convex rail portion 22, so that the upper surface of the sill 5 and the lower surface of the lower arm 11 are mounted with a slight gap.

  25 and 26 are a plan view and a bottom view of the shoji of the wooden sash according to the present invention, respectively. Here, since the external shoji 26 and the internal shoji 27 have the same structure, they are not individually illustrated as a plan view of the shoji and a bottom view of the shoji. As shown in FIG. 25, an aluminum channel 37 is embedded in the recessed groove of the upper rod 10 at a location slightly separated from the joint portion of the left vertical rod 8 and the right vertical rod 9, respectively. It is buried as an anti-slip on the shoji side. Further, as shown in FIG. 26, an aluminum channel 37 is embedded in the concave groove of the lower rod 11 at a position slightly separated from the joint portion of the left vertical rod 8 and the right vertical rod 9 as a detent on the shoji side. ing.

  According to the present invention, with respect to the problem that corrosion occurs due to aging, which is the greatest weakness of wooden sashes, the convex portion formed on the lower surface of the Kamoi that is supposed to cause corrosion due to long-term use is convex. On the other hand, if the guide part can be divided by screwing, the convex part formed on the top of the sill can be divided by screwing as a convex rail part, making maintenance during corrosion easier. -Permanent use of the wooden sash is possible without causing any problems in the opening and closing and airtightness of the inner shoji.

Further, according to the gist of the present invention, it is obvious that the technical application is not limited only to the draw-type wooden sash, but is suitably applied to the single-draw type wooden sash. In addition, in Japan, where the humidity is high, it will be possible to apply the technology to support frames for general wooden fittings in the future.

The front view which looked at the wooden sash which concerns on this invention from the outdoor side. The support frame front view of the wooden sash which concerns on this invention. The moving frame front view of the wooden sash which concerns on this invention. The top view of the Kamoi according to the present invention. The front view of the Kamoi according to the present invention. The bottom view of the Kamoi according to the present invention. The left view of the Kamoi according to the present invention. The right view of the Kamoi according to the present invention. The AA sectional view of Kamoi according to the present invention. The front view of a left vertical frame. The rear view of a left vertical frame. The front view of a right vertical frame. The rear view of a right vertical frame. The top view which showed the joint of the Kamoi and the vertical frame. The bottom view which showed joining of Kamoi and a vertical frame. The top view of the threshold which concerns on this invention. The front view of the threshold which concerns on this invention. The bottom view of the threshold which concerns on this invention. The right view of the threshold which concerns on this invention. The left view of the threshold which concerns on this invention. BB sectional drawing of the threshold which concerns on this invention. The horizontal section showing the structure of the wooden sash concerning the present invention. The enlarged view of the summoning part of the wooden sash in FIG. The longitudinal cross-sectional view which showed the structure of the wooden sash based on this invention. The top view of the shoji of the wooden sash which concerns on this invention. The bottom view of the shoji of the wooden sash which concerns on this invention.

1 Wooden sash of the present invention 2 Kamoi 3 Right vertical frame

4 left vertical frame 5 threshold 6 support frame 7 moving frame 8 left vertical rod 9 right vertical rod 10 upper rod 11 lower rod 13 handle 14 locking 15 convex guide portion 16 screw 17 guide case 18 wooden guide 19 boss hole 20 boss 21 , 34 Concave groove 22 Convex rail part 23 Rail case 24 Wooden rail 25 Aluminum square bar 26

28 Joint convex part 29 Guide groove 30 Rail groove 31 Double glass plate 32 Edge A type 33 Edge B type 35 Pinch block 36 Flat door car 37 Aluminum channel

Claims (2)

A rectangular wooden support frame composed of a duck, a right vertical frame, a left vertical frame, and a sill, and an external and internal shoji made up of a frame and a glass plate formed by a recumbent and a vertical fence. In the sliding wooden sash comprising a moving frame that is reciprocated in the left-right direction in the wooden support frame, the two guide grooves carved on the lower surface side of the Kamoi have a U-shaped cross section. The two convex guide parts composed of a long aluminum guide case and a wooden guide which is sealed in the guide case and has a rectangular cross section are attached to the lower end of the wooden guide by a plurality of screws. In the two rail grooves carved on the upper surface side of the sill so as to be perpendicular to the two convex guide parts attached to the above-mentioned Kamoi through the wooden guide Is a long aluminum rail case with a U-shaped cross section The two convex rail parts composed of a wooden rail having a concave and long cross section sealed to the rail case and an aluminum square bar fixed to the concave part of the wooden rail are formed by a plurality of screws. A wooden sash of the sliding method, characterized in that it is attached to the sill through the wooden rail and rail case from the top of the aluminum square bar.
  2. An aluminum channel is embedded in each of the recesses of the upper and lower heels constituting the outer and inner shojis at locations slightly spaced from the joints of the left and right vertical rods. Wooden sash as described in.

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