JP7483467B2 - Attachment for sash bottom frame and remodeling method using same - Google Patents

Description

The present invention relates to a sash sill attachment for remodeling that is attached to an existing sash sill and a remodeling method using the same.

Patent Document 1 describes an invention for a house in which a semi-outdoor space such as a terrace or balcony is provided on the outdoor side of a living room, bedroom, or other living space, and the living space and the semi-outdoor space are connected via an opening in the wall between the living space and the semi-outdoor space that people can enter and exit through, and the floor of the living space and the floor of the semi-outdoor space are made flush with each other, and full-flat sashes are used so that there is almost no difference in level between the floor of the living space and the floor of the semi-outdoor space at the opening. According to the invention described in Patent Document 1, the floor from the living space to the semi-outdoor space is continuously connected without any difference in level via the full-flat sash at the opening, so that the living space feels as if it has been expanded spatially by the semi-outdoor space, and it is possible to create a space that gives a sense of openness that continues from the inside to the outside.

Patent Document 2 also describes an invention in which a remodeled sash sash is attached to an existing sash sash at an entrance to a building frame that separates the interior and exterior of the building, with the upper ends of the protruding elements of the upper plate formed at a predetermined substantially uniform height, so that the upper ends of the protruding elements of the remodeled sash sash are substantially flush with the floor surface inside the building. This remodels the existing sash sash, eliminating steps that elderly people or small children may trip over or that may impede wheelchair access, making the building "barrier-free."

JP 2017-198024 A JP 2001-227244 A

Demand for homes with a semi-outdoor space that is connected to the outdoor side of the living space through an opening, as described above, has been increasing in recent years because of the excellent effect of making the living space feel larger and more open. When building a new home, it is possible to design and build it from the beginning to include a semi-outdoor space such as that described in Patent Document 1, but building a new home is costly, so there is also a high demand for renovating an existing home to later include a semi-outdoor space such as that described in Patent Document 1.

When renovating an existing house to create a semi-outdoor space as described in Patent Document 1, if the exterior wall separating the interior and exterior of the existing house has a sliding window that opens down to the interior floor, it is possible to create a semi-outdoor space at low cost by utilizing this sliding window and installing an outdoor floor such as a deck on the outdoor side of the sliding window so that it is flush with the floor on the indoor side.

However, the sash bottom frames of the French window installed in such existing houses are usually not fully flat sashes as described in Patent Document 1, so simply providing an outdoor floor flush with the indoor floor on the outdoor side of the French window means that the continuity between the indoor floor and the outdoor floor is interrupted at the sash bottom frame of the French window, making it difficult to achieve the effect of a semi-outdoor space as described in Patent Document 1. Therefore, if the sash bottom frame of the French window can be converted to a fully flat sash through renovation, it is thought that a semi-outdoor space with continuity from the indoor floor to the outdoor floor can be created.

Patent Document 2 describes an invention in which a remodeled sash sash with its upper end aligned is attached so as to overlap the existing sash sash, making the height of the indoor floor and the height of the upper end of the remodeled sash sash approximately equal, thus making the room barrier-free. However, in the invention described in Patent Document 2, a remodeled sash sash with a new rail or other protruding element is placed on top of the existing sash sash, so it is difficult to make the height of the existing indoor floor and the height of the upper end of the remodeled sash sash sash equal unless the existing sash sash is set considerably lower than the indoor floor. If there is no difference in height between the top end of the existing sash sash frame and the existing interior floor, or if the existing sash sash frame is not large enough to accommodate the installation of a remodeled sash sash frame, remodeling the existing sash sash frame using the invention described in Patent Document 2 will result in the top end of the remodeled sash sash frame being higher than the floor surface of the existing interior floor, which will require new remodeling of the interior floor, such as raising the floor surface of the existing interior floor to match the top end of the remodeled sash sash frame, which will be costly. In addition, the invention described in Patent Document 2 is for aligning the top ends of the protruding elements of the remodeled sash sash frame, such as rails, to make the top ends of the protruding elements barrier-free so that they do not protrude above the floor surface of the room, but a large groove is formed between the rails of the remodeled sash sash frame, and it does not take into consideration making the grooves between the rails as flat as possible to make the sash as fully flat.

The present invention was made in consideration of the above circumstances, and aims to provide a sash sill attachment that can remodel an existing sash sill to create a fully flat sash, even when there is no difference in height between the top end of the sash sill installed in a French window of an existing house and the floor level inside the room.

In order to solve the above-mentioned problems, the present invention provides a sash bottom frame attachment that is attached to an existing sash bottom frame that is provided at the bottom edge of an opening formed in an exterior wall that separates the interior and exterior of an existing house, the existing sash bottom frame comprising an upper surface portion that covers the bottom edge at a position lower than the height position of the floor surface of the room, two rails, an inner rail and an outer rail, for guiding a paper screen that opens and closes the opening, the rails being provided on the upper surface portion so that their upper ends are at a position approximately equal to the height position of the floor surface of the room or lower than the height position of the floor surface of the room, and three groove portions, an inner groove portion , an intermediate groove portion and an outer groove portion, each having the upper surface portion as a bottom surface, that are formed by the upper surface portion and the two rails , the inner groove portion, an intermediate groove portion and an outer groove portion , and the sash bottom frame attachment is made up of a plurality of attachment members that are attached to each of the groove portions, the inner attachment member being attached to the inner groove portion, the intermediate attachment member being attached to the intermediate groove portion and the outer groove portion being provided with an inner groove portion. and an outer attachment member to which the inner attachment member, intermediate attachment member, and outer attachment member are attached, respectively , having a planar portion that is at a height position approximately equal to the height position of the floor surface inside the room when attached to the corresponding inner groove portion, intermediate groove portion , and outer groove portion, the inner attachment member, intermediate attachment member, and outer attachment member are detachably attached to the corresponding inner groove portion, intermediate groove portion, and outer groove portion, the outer attachment member attached to the outer groove portion closest to the outdoors is fixed to the outer groove portion, and a side wall is formed that rises upward from the upper surface portion to the floor surface inside the room, a gap is formed between the planar portion of the inner attachment member and the side wall, a gap is formed between the planar portion of the intermediate attachment member and the inner rail and the outer rail, and a gap is formed between the planar portion of the outer attachment member and the outer rail .

Preferably, the attachment for a sash bottom frame of the present invention is characterized in that the outer attachment member is composed of a first outer attachment member and a second outer attachment member, the first outer attachment member having an attachment portion formed separately from the outer rail so that a screw can be inserted therethrough, and a base portion which is screwed onto the upper surface portion of the outer groove portion, and the second outer attachment member has an engagement portion which engages with the mounting portion, and a flat portion which is approximately flush with the floor surface inside the room when the outer attachment member is attached to the outer groove portion .

Preferably , the inner attachment member is provided with two legs each extending downward from the planar portion, and when the inner attachment member is attached to the inner groove portion, one of the legs abuts against the side wall or a small protruding piece formed on the side wall, and the other leg abuts against the inner rail .

Preferably, the attachment for a sash bottom frame of the present invention is characterized in that the intermediate attachment member has two legs which support the planar portion horizontally, and the two legs extend locking pieces from their lower ends to the inner rail and the outer rail.

The remodeling method of the present invention is a method for remodeling the existing sash sash provided at the lower edge of the opening formed in the exterior wall that separates the interior and exterior of the existing house by using the sash sash attachment of the present invention, the method comprising: a top surface portion that covers the lower edge at a position lower than the height position of the floor surface of the interior of the house; and an inner rail for guiding the shoji screen that opens and closes the opening, the top surface portion being provided at a position approximately equal to the height position of the floor surface of the interior of the house or a position lower than the height position of the floor surface of the interior of the house. The existing sash bottom frame has two rails, namely an inner rail and an outer rail , and three groove portions, namely the inner groove portion, the intermediate groove portion and the outer groove portion, with the upper surface portion formed by the upper surface portion and the two rails as its bottom surface, by attaching three attachment members, namely the inner attachment member, the intermediate attachment member and the outer attachment member of the sash bottom frame attachment, to the three groove portions, the flat portion being at a height position approximately equal to the height position of the floor surface inside the room.

The remodeling method according to the present invention is preferably characterized in that an outdoor floor is provided on the outdoor side of the opening at a height position substantially equal to the height position of the indoor floor, and the indoor floor is connected to the outdoor floor at a substantially flush level via the lower edge of the opening.

Preferably, the renovation method of the present invention is characterized in that a gap of a predetermined distance is provided between the flat surfaces of the three attachment members and the two rails, and newly installed shoji screens are provided in the opening, each of which is guided by the two rails.

The sash bottom frame attachment of the present invention is a sash bottom frame attachment that is attached to an existing sash bottom frame that is provided at the bottom edge of an opening formed in an exterior wall that separates the interior and exterior of an existing house, and the existing sash bottom frame has an upper surface portion that covers the bottom edge at a position lower than the height position of the floor surface of the room, at least one rail for guiding a shoji screen that opens and closes the opening, which is provided on the upper surface portion so that its upper end is at a position approximately equal to the height position of the floor surface of the room or lower than the height position of the floor surface of the room, and at least one rail for guiding a shoji screen that opens and closes the opening, which is provided on the upper surface portion so that its upper end is at a position approximately equal to the height position of the floor surface of the room or lower than the height position of the floor surface of the room, and The sash bottom frame attachment is made up of a number of attachment members that are attached to each of the grooves, and each of the attachment members has a flat surface that is at approximately the same height as the floor surface inside the room when attached to the corresponding groove. By attaching each attachment member of the sash bottom frame attachment of the present invention to the corresponding groove formed in the existing sash bottom frame, a flat surface is formed in each groove that is at approximately the same height as the floor surface inside the room, so that the existing sash bottom frame can be easily made into a full flat sash by using the sash bottom frame attachment of the present invention.

Preferably, the sash frame attachment of the present invention is characterized in that each of the attachment members can be attached and detached freely to the corresponding groove, so that when it is desired to clean the dust or dirt that has accumulated in the groove, the sash frame attachment can be easily removed from the groove for cleaning, and can then be easily attached to the groove again.

Preferably, the sash sill attachment of the present invention is characterized in that the attachment member attached to the groove portion closest to the exterior is fixed to the groove portion, so that the attachment member attached to the groove portion closest to the exterior can be prevented from falling off to the exterior side.

Preferably, the sash frame attachment of the present invention is characterized in that when each of the attachment members is attached to the corresponding groove, a predetermined gap is provided between each of the flat surfaces and at least one of the rails, so that even after the sash frame attachment is attached to the existing sash frame, a sliding screen can be installed in the opening by utilizing the rail provided on the existing sash frame.

The remodeling method according to the present invention is a method for remodeling an existing sash bottom frame that is installed at the bottom edge of an opening formed in an exterior wall that separates the interior and exterior of an existing house using the sash bottom frame attachment according to the present invention, and comprises an upper surface portion that covers the bottom edge at a position lower than the height position of the floor surface of the room, at least one rail for guiding a shoji screen that opens and closes the opening, which is installed on the upper surface portion so that its upper end is at a position approximately equal to the height position of the floor surface of the room or lower than the height position of the floor surface of the room, and at least two rails with the upper surface portion formed by the upper surface portion and the at least one rail as a bottom surface. By attaching each of the attachment members of the sash bottom frame attachment to each of the grooves of the existing sash bottom frame, a flat portion is formed in each of the grooves at a height substantially equal to the height of the floor surface inside the room. Therefore, according to the remodeling method of the present invention, the sash bottom frame at the bottom edge of the opening in the existing house can be easily made substantially flush with the floor surface inside the room by simply attaching the sash bottom frame attachment of the present invention to the existing sash bottom frame without carrying out extensive remodeling such as replacing the existing sash bottom frame or raising the floor inside the room, thereby making the sash bottom into a fully flat sash.

The remodeling method according to the present invention is preferably characterized in that an outdoor floor is provided on the outdoor side of the opening at a height position approximately equal to the height position of the indoor floor, and the indoor floor is connected to the outdoor floor at a substantially flush level via the lower edge of the opening. This makes it possible to easily create a semi-outdoor space that gives the impression of an expanded indoor space and a sense of openness that continues from the indoors to the outdoors, even in an existing house.

The remodeling method according to the present invention is preferably characterized in that a gap of a predetermined distance is provided between each of the flat surfaces and the at least one rail, and a new shoji screen is provided in the opening, guided by the at least one rail. This means that the new shoji screen can be provided in approximately the same position using the same rail before and after the remodeling, without providing a new rail for the new shoji screen.

An oblique view showing an existing sash bottom frame installed in an opening in the exterior wall of an existing house that is the target of renovation using a sash bottom frame attachment according to one embodiment of the present invention. FIG. 2 is a cross-sectional side view taken along the line XX in FIG. 1 . A cross-sectional side view showing the state of the existing sash bottom frame with the existing shoji screen and groove cover removed from Figure 2. 4 is a cross-sectional side view showing a state in which an attachment for a sash bottom frame according to one embodiment of the present invention is attached to the existing sash bottom frame in the state of FIG. 3 . A cross-sectional side view showing the state in which an outdoor floor that is approximately flush with the indoor floor surface and a newly installed shoji screen have been installed from the state shown in Figure 4. This is an oblique view showing a semi-outdoor space being created in an existing house through renovation, in which a sash bottom frame attachment according to one embodiment of the present invention is attached to an existing sash bottom frame and an outdoor floor is created on the outdoor side that is approximately flush with the indoor floor.

One embodiment of the sash sill attachment and the remodeling method using the same according to the present invention will be described below with reference to the drawings. However, the following is merely an example of one embodiment of the present invention, and the scope of the present invention is not limited to the following embodiment, and can be modified as appropriate without departing from the concept of the present invention.

The sash bottom frame attachment 1 according to one embodiment of the present invention is used when renovating an existing sash bottom frame 8 that is provided at the bottom edge of an opening 12 formed in an exterior wall 11 of an existing house as shown in Figures 1 to 3. As shown in Figures 4 to 6, by attaching the sash bottom frame attachment 1 to the existing sash bottom frame 8, the height position of the bottom edge of the opening 12 is aligned approximately the same as the height position of the indoor floor surface 13, making the existing sash bottom frame 8 into a fully flat sash.

As shown in Figures 1 and 2, the opening 12 is provided in the exterior wall 11 that separates the interior and exterior of the existing house, penetrating the exterior wall 11, and is a so-called sweep window that is approximately rectangular when viewed perpendicular to the exterior wall 11, with the lower side opening up to the height of the floor surface 13 inside the room and large enough for people to enter and exit. A sash frame is provided to cover the four sides of the opening 12, and an inner sash 71 and an outer sash 72 for opening and closing the opening 12 are provided inside the sash frame. The inner sash 71 is provided on the interior side, and the outer sash 72 is provided on the exterior side, so that the opening 12 can be opened and closed sideways. When the opening 12 is closed, the inner sash 71 and the outer sash 72 overlap in the middle joint area, forming a so-called sliding door. The existing sash lower frame 8 is the lower frame of the sash frame provided in such an opening 12.

As shown in FIG. 2, the existing sash lower frame 8 according to this embodiment has an upper surface portion 81 that is the upper surface of the existing sash lower frame 8 that covers the lower edge of the opening 12, and an inner rail 82 and an outer rail 83 that are provided so as to protrude approximately vertically upward from the upper surface portion 81. The inner rail 82 and the outer rail 83 are strip-shaped rails that extend approximately parallel to each other along the longitudinal direction of the lower edge of the opening 12, and are each designed to receive the wheels of the inner shoji 71 and the outer shoji 72 at their upper ends. The inner shoji 71 can move along the inner rail 82 by the wheel 73 of the inner shoji 71 running on the inner rail 82, and the outer shoji 72 can move along the outer rail 83 by the wheel 74 of the outer shoji 72 running on the outer rail 83.

The height position of the upper surface portion 81 is lower than the height position of the indoor floor surface 13, and the height positions of the upper ends of the inner rail 82 and the outer rail 83 are approximately equal to the height position of the indoor floor surface 13 or lower than the height position of the indoor floor surface 13. In this embodiment, as shown in Figures 2 and 3, the inner rail 82 and the outer rail 83 are formed so that the height positions of their respective upper ends are approximately equal to each other and approximately equal to the height position of the indoor floor surface 13. A side wall 84 is provided on the indoor side end edge of the upper surface portion 81, rising approximately vertically upward from the upper surface portion 81 to the indoor floor surface 13. In this embodiment, the existing sash bottom frame 8 is provided with two rails, an inner rail 82 and an outer rail 83, for guiding the shoji screen, so the existing sash bottom frame 8 has three grooves recessed below the height of the indoor floor surface 13, with the top surface 81 as the bottom surface: an inner groove 85 formed on the indoor side of the existing sash bottom frame 8 by the side wall 84, the inner rail 82, and the top surface 81; an intermediate groove 86 formed in the middle of the existing sash bottom frame 8 by the inner rail 82, the outer rail 83, and the top surface 81; and an outer groove 87 formed on the outdoor side of the existing sash bottom frame 8 by the outer rail 83 and the top surface 81.

Since the opening 12 is formed in the exterior wall 11, it is exposed to rain on rainy days, and rain etc. received by the inner and outer screens 71 and 72 installed in the opening 12 drips onto the upper surface 81 of the existing sash lower frame 8. Therefore, the upper surface 81 is higher on the indoor side and lower on the outdoor side so that the rain is discharged to the outdoor side. In this embodiment, as shown in Figures 2 and 3, in the inner groove portion 85, the upper surface portion 81 extends from the side wall 84 toward the outdoor side at an approximately horizontal or gentle downward incline, approaches the inner rail 82 and passes the approximate center of the cross section of the inner groove portion 85, then slopes downward at a steep slope, and then becomes approximately horizontal again and connects to the inner rail 82. In the intermediate groove portion 86 from the inner rail 82 to the outer rail 83, the upper surface portion 81 slopes downward at a steep slope from the inner rail 82 toward the outdoor side, and then extends approximately horizontally to the outer rail 83. In the outer groove 87 from the outer rail 83 to the outdoor edge of the upper surface 81, the upper surface 81 is approximately horizontal or gently inclined downward from the outer rail 83 toward the outdoor side. In this way, the upper surface 81 is inclined downward or approximately horizontal from the indoor side to the outdoor side, so that rain that falls on the upper surface 81 or drips from the inner shoji 71 and the outer shoji 72 onto the upper surface 81 naturally flows to the outdoor side and is discharged to the outdoor side from the outdoor edge of the upper surface 81. The inner rail 82 and the outer rail 83 are formed slightly shorter than the longitudinal length of the upper surface 81 so that rain flows from the inner groove 85 to the intermediate groove 86 and from the intermediate groove 86 to the outer groove 87, and a gap is provided between both ends of the inner rail 82 and the outer rail 83 and the sash frame provided on the side of the opening 12.

The inner shoji 71 and the outer shoji 72 are composed of a frame body in which an upper frame, a lower frame, and two vertical frames are assembled in a rectangular circumferential shape, and a panel body such as glass attached to the inner circumference of the frame body. As shown in FIG. 2, the lower frame 75 of the frame body of the inner shoji 71 and the lower frame 76 of the frame body of the outer shoji 72 are provided with grooves 77 and 78 along the longitudinal direction on the lower surface, respectively. The inner shoji 71 is attached such that the upper end of the inner rail 82 is engaged with the groove 77 on the lower surface of the lower frame 75, and the door roller 73 provided at the position of the groove 77 inside the lower frame 75 is placed on the upper end of the inner rail 82, and the outer shoji 72 is attached such that the upper end of the outer rail 83 is engaged with the groove 78 on the lower surface of the lower frame 76, and the door roller 74 provided at the position of the groove 78 inside the lower frame 76 is placed on the upper end of the outer rail 83. Therefore, the height position of the lower surface of the bottom frame 75 of the inner screen 71 and the bottom frame 76 of the outer screen 72 is lower than the height position of the upper end of the inner rail 82 and the outer rail 83, respectively, preventing rain, wind, etc. that the inner screen 71 and the outer screen 72 receive on the outdoor side from easily entering the inside of the room. Also, since the inner screen 71 and the outer screen 72 are arranged so that the lower part of the bottom frame 75 and the bottom frame 76 are covered by the upper part of the inner rail 82 and the outer rail 83, respectively, a space is required on both sides of the inner rail 82 and the outer rail 83 to accommodate the lower part of the bottom frame 75 and the bottom frame 76, but the inner groove portion 85, the middle groove portion 86, and the outer groove portion 87 provide the space to accommodate the bottom frame 75 and the bottom frame 76.

2, in this embodiment, cover members 97, 98 that cover the upper surface portion 81 are attached to the inner groove portion 85 and the intermediate groove portion 86, respectively. If the existing sash lower frame 8 is made of a metal such as aluminum, it has high thermal conductivity. For example, in winter when the outdoor temperature is low, the existing sash lower frame 8 is cooled, and heat exchange occurs between the inside and outside through the existing sash lower frame 8, causing the indoor temperature to drop. The cover members 97, 98 are resin covers with lower thermal conductivity than the existing sash lower frame 8, which are used to mitigate such heat exchange and keep the room warm. The height position of the lower surface of the lower frame 75 of the inner screen 71 and the lower frame 76 of the outer screen 72 is lower than the height position of the upper end of the inner rail 82 and the outer rail 83, so that the cover members 97, 98 are lower than the lower end position of the inner screen 71 and the outer screen 72 so as not to interfere with the inner screen 71 and the outer screen 72 when attached to the inner groove portion 85 and the intermediate groove portion 86. The protruding pieces protruding toward the inner groove portion 85 from the base end of the side wall 84 and the base end of the inner rail 82 shown in Figures 2 and 3 are pieces for attaching the cover member 97. In addition, the intermediate groove portion 86 is provided with an attachment piece 88 that protrudes approximately vertically upward from the upper surface portion 81. The attachment piece 88 is provided slightly outside from the approximate center of the cross section of the intermediate groove portion 86, extends in the longitudinal direction of the intermediate groove portion 86, and its upper end is at a height that does not exceed the height position of approximately the center in the height direction of the outer rail 83. The intermediate groove 86 is also provided with a small hook-shaped protruding piece that protrudes from the middle of the height direction of the inner rail 82 toward the intermediate groove 86, and as shown in FIG. 2, the cover member 98 is attached to the intermediate groove 86 by the small hook-shaped protruding piece and the mounting piece 88. The small hook-shaped protruding piece protruding toward the intermediate groove 86 side of the inner rail 82 is designed so that the upper surface 81 of the intermediate groove 86 slopes steeply downward from the inner rail 82 toward the outside and then extends approximately horizontally to the outer rail 83, but the protruding length is such that the upper surface 81 fits within the sloped area.

In this embodiment, as shown in Figs. 2 and 3, an existing screen rail 89 protruding upward from the upper surface portion 81 is provided in the outer groove portion 87. A screen (not shown) may be provided in the opening 12 on the outdoor side of the outer screen 72, and the existing screen rail 89 is a rail for receiving the screen wheel. The existing screen rail 89 is a strip-shaped rail that is provided on the outdoor side of the outer rail 83 and extends along the outer rail 83, and the height position of its upper end is lower than the height position of the upper end of the outer rail 83. The screen is intended to prevent insects and the like from entering the room when the inner screen 71 or the outer screen 72 is opened, so it is usually lighter than the inner screen 71 or the outer screen 72, and the rail for the screen does not require as much strength as the inner rail 82 or the outer rail 83 for the inner screen 71 or the outer screen 72, and is usually smaller than the inner rail 82 or the outer rail 83. Figures 2 and 3 show an example in which the height from the base end to the top end of the existing screen door rail 89 is approximately one-fourth the height from the base end to the top end of the outer rail 83. The screen door rollers run on the existing screen door rail 89, allowing the screen door to move along the existing screen door rail 89.

In this embodiment, as shown in Figs. 2 and 3, the existing sash lower frame 8 is composed of two members, an indoor member 91 and an outdoor member 92, and an insulating member 93 is sandwiched between the indoor member 91 and the outdoor member 92, and the indoor member 91 and the outdoor member 92 are connected by the insulating member 93. With this configuration, even if the indoor member 91 and the outdoor member 92 are made of a metal material with high thermal conductivity such as aluminum, the insulating member 93 sandwiched between them suppresses heat exchange between the indoor side and the outdoor side, thereby improving the heat retention inside the room. When the indoor member 91 and the outdoor member 92 are connected by the insulating member 93, the upper surface portion 81 is smoothly connected without grooves at the connection part of the insulating member 93 as shown in Figs. 2 and 3, and can be considered as a watertight unit from the indoor side to the outdoor side.

The sash bottom frame attachment 1 is used to remodel an existing sash bottom frame 8 as described above to make it a full flat sash. In this embodiment, the existing sash bottom frame 8 has three grooves: an inner groove 85, an intermediate groove 86, and an outer groove 87. Therefore, the sash bottom frame attachment 1 according to this embodiment has an inner attachment member 2 attached to the inner groove 85, an intermediate attachment member 3 attached to the intermediate groove 86, and an outer attachment member 4 attached to the outer groove 87, as shown in Figures 4 and 5.

As shown in FIG. 4, the inner attachment member 2 has a flat surface 21 that is at a height position approximately equal to the height position of the floor surface 13 inside the room when the inner attachment member 2 is attached to the inner groove portion 85. The flat surface portion 21 is approximately rectangular and long in the longitudinal direction of the inner groove portion 85. The length of the long side of the flat surface portion 21 is approximately equal to the length of the longitudinal direction of the inner groove portion 85, but the length of the short side of the flat surface portion 21 is shorter than the distance between the inner rail 82 and the side wall 84 of the inner groove portion 85, so that a predetermined gap is provided between the flat surface portion 21 and the inner rail 82 when the inner attachment member 2 is attached to the inner groove portion 85. In this embodiment, legs 22 and 23 are provided so as to extend downward from the two opposing long sides of the planar portion 21, and when the inner attachment member 2 is attached to the inner groove portion 85, the lower ends of the legs 22 and 23 abut against the upper surface portion 81, and the planar portion 21 is supported by the legs 22 and 23 so as to be horizontal.

In this embodiment, when the inner attachment member 2 is attached to the inner groove 85, a gap is also provided between the flat portion 21 and the side wall 84, and the leg portion 22 provided on the side wall 84 side has an inclined portion 24 at the upper portion that extends diagonally downward from the long side of the flat portion 21 on the side wall 84 side toward the side wall 84 to the vicinity of the side wall 84. In this embodiment, a protruding piece that protrudes toward the inside of the inner groove 85 is provided at the base end of the side wall 84, and the leg portion 22 is composed of an inclined portion 24 at the upper portion, a vertical wall portion 25 that extends approximately vertically downward from the lower end edge of the inclined portion 24, and an approximately inverted L-shaped bent portion 26 that bends from the lower end edge of the vertical wall portion 25 to the inside of the inner groove 85 so as to avoid the protruding piece at the base end of the side wall 84, and then extends approximately vertically downward to the upper surface portion 81. On the other hand, the leg 23 provided on the inner rail 82 side has a vertical wall 27 that extends approximately vertically downward from the long side of the flat portion 21 on the inner rail 82 side to the upper surface portion 81, and a locking piece 28 that extends from the lower end edge of the vertical wall 27 toward the base end on the inner groove portion 85 side of the inner rail 82.

The inner attachment member 2 is detachably attached to the inner groove 85 by fitting it from above. Since there is a gap between the flat portion 21 and the side wall 84 and the inner rail 82, when removing the inner attachment member 2 from the inner groove 85, it is easy to remove it by inserting a finger or the like into the gap. Even if there is a gap between the flat portion 21 and the side wall 84 and the inner rail 82, the vertical wall portion 25 of the leg 22 is approximately abutted against the side wall 84 and/or the bent portion 26 of the leg 22 is approximately abutted against the protruding piece at the base end of the side wall 84, and the tip of the locking piece 28 of the leg 23 is approximately abutted against the inner rail 82, so that the flat portion 21 is prevented from moving in the short direction.

In this embodiment, a gap is provided between the flat portion 21 and the side wall 84, and the leg portion 22 on the side wall 84 side has an inclined portion 24 that extends diagonally downward from the long side of the flat portion 21 on the side wall 84 side toward the side wall 84 to the vicinity of the side wall 84, and the vertical wall portion 25 extends approximately vertically downward from the lower end edge of the inclined portion 24. However, for example, a gap does not need to be provided between the flat portion 21 and the side wall 84 by not providing the inclined portion 24, but by extending the flat portion 21 toward the side wall 84 and further extending the vertical wall portion 25 upward so that the vertical wall portion 25 extends downward directly from the long side of the flat portion 21 on the side wall 84 side. In addition, the lower part of the leg 22 has a bent part 26 recessed inward from the vertical wall part 25, but this is because a protruding piece for attaching the cover member 97 is provided at the base end of the side wall 84. If such a protruding piece is not provided on the side wall 84, the bent part 26 can be omitted and the vertical wall part 25 can be extended downward to abut against the upper surface part 81. When the inner attachment member 2 is attached to the inner groove part 85, the flat surface part 21 is supported so as to be approximately flush with the floor surface 13 inside the room, and any gap can be maintained between the flat surface part 21 and the inner rail 82 at least.

The inner attachment member 2 does not have to be configured as a single member. For example, if the inner groove portion 85 has a long longitudinal length, the inner attachment member 2 may be configured as multiple parts divided in the longitudinal direction, as long as the planar portion 21 is formed when all of the parts are attached to the inner groove portion 85.

When the inner attachment member 2 is attached to the inner groove 85, a flat surface 21 is formed in the inner groove 85. The flat surface 21 is approximately flush with the floor surface 13 inside the room, and will be stepped on when people pass by. Therefore, it is possible to provide an anti-slip surface by forming multiple grooves on the surface of the flat surface 21.

As shown in FIG. 4, the intermediate attachment member 3 has a flat surface 31 that is approximately flush with the floor surface 13 inside the room when the intermediate attachment member 3 is attached to the intermediate groove portion 86. The flat surface 31 is approximately rectangular and is long in the longitudinal direction of the intermediate groove portion 86. The length of the long side of the flat surface 31 is approximately equal to the longitudinal length of the intermediate groove portion 86, but the length of the short side is shorter than the distance between the inner rail 82 and the outer rail 83 of the intermediate groove portion 86, so that when the intermediate attachment member 3 is attached to the intermediate groove portion 86, a predetermined gap is provided between the flat surface 31 and the inner rail 82 and between the flat surface 31 and the outer rail 83.

In this embodiment, the intermediate attachment member 3 is composed of a first intermediate attachment member 34 having a planar portion 31, legs 32 extending substantially perpendicularly downward from each of the two opposing long sides of the planar portion 31, and engagement pieces 33 extending from the extending end edges of the two legs 32 in directions approaching each other, and one or more second intermediate attachment members 35 attached to the first intermediate attachment member 34.

The first intermediate attachment member 34 has two legs 32 that are approximately equal in length, and two engaging pieces 33 that are approximately equal in length, with a gap between the two engaging pieces 33, making it a longitudinal member with a roughly C-shaped cross section.

The second intermediate attachment member 35 has two slide grooves 36 in which the two engagement pieces 33 of the first intermediate attachment member 34 can slide. The second intermediate attachment member 35 is attached to the lower part of the first intermediate attachment member 34 by engaging the two engagement pieces 33 of the first intermediate attachment member 34 with the two slide grooves 36, respectively, and sliding the second intermediate attachment member 35 from the longitudinal ends of the first intermediate attachment member 34.

The second intermediate attachment member 35 is provided with an attachment groove 37 that can engage with an attachment piece 88 protruding upward from the upper surface 81 of the intermediate groove portion 86. The attachment groove 37 opens on the lower surface of the second intermediate attachment member 35, and the attachment piece 88 fits into the attachment groove 37 by pushing the second intermediate attachment member 35 approximately vertically downward with the lower surface of the second intermediate attachment member 35 facing downward and aligning the upper end of the attachment piece 88 with the opening of the attachment groove 37. At that time, the lower surface of the second intermediate attachment member 35 abuts against the upper surface 81 of the intermediate groove portion 86. As shown in FIG. 4, the width of the attachment groove 37 is tapered so that the width gradually increases from approximately the middle of the depth direction of the attachment groove 37 to the opening, making it easier to engage the attachment piece 88 with the attachment groove 37.

In this embodiment, the second intermediate attachment member 35 has two mounting grooves 37 that are approximately parallel to each other, and the second intermediate attachment member 35 has an approximately plane-symmetrical shape with the two slide grooves 36 and the two mounting grooves 37 arranged approximately symmetrically with respect to a symmetry plane passing through its center. The first intermediate attachment member 34 also has an approximately plane-symmetrical shape with the two legs 32 and the two engagement pieces 33 arranged approximately symmetrically with respect to a symmetry plane that passes approximately the center of the cross section of the planar portion 31 and is approximately perpendicular to the planar portion 31. When the second intermediate attachment member 35 is attached to the first intermediate attachment member 34, the symmetry plane of the first intermediate attachment member 34 and the symmetry plane of the second intermediate attachment member 35 are approximately aligned, and the intermediate attachment member 3 with one or more second intermediate attachment members 35 attached to the lower part of the first intermediate attachment member 34 has an approximately plane-symmetrical shape with respect to a symmetry plane that passes approximately the center of the planar portion 31 and is approximately perpendicular to the planar portion 31.

Such an intermediate attachment member 3 is attached by fitting it from above into the intermediate groove 86 with the second intermediate attachment member 35 on the lower side. In this embodiment, the attachment piece 88 is provided slightly outside of the approximate center of the cross section of the intermediate groove 86, and the two attachment grooves 37 of the second intermediate attachment member 35 are provided approximately symmetrically with respect to a symmetry plane that passes through the approximate center of the cross section of the planar portion 31 of the intermediate attachment member 3, and are positioned slightly offset from the approximate center of the cross section of the planar portion 31. The distance between this attachment piece 88 and the approximate center of the cross section of the intermediate groove portion 86 is approximately equal to the distance between each attachment groove 37 and the approximate center of the cross section of the flat portion 31. When the intermediate attachment member 3 is pushed approximately vertically downward from above the intermediate groove portion 86 so that the approximate center of the cross section of the flat portion 31 is aligned with the approximate center of the cross section of the intermediate groove portion 86, the attachment piece 88 fits into the attachment groove 37 on one side of each second intermediate attachment member 35 of the intermediate attachment member 3, and the intermediate attachment member 3 is attached to the intermediate groove portion 86.

When the intermediate attachment member 3 is attached to the intermediate groove 86, the lower surface of each second intermediate attachment member 35 abuts against the upper surface 81 of the intermediate groove 86. The first intermediate attachment member 34 is supported by each second intermediate attachment member 35 so that the height position of the planar portion 31 is approximately equal to the height position of the floor surface 13 in the room and is approximately horizontal. The length of the planar portion 31 in the short side direction is shorter than the distance between the inner rail 82 and the outer rail 83 of the intermediate groove 86, and the position of the approximate center of the cross section of the planar portion 31 and the approximate center of the cross section of the intermediate groove 86 are approximately aligned, so that a gap is provided between the planar portion 31 and the inner rail 82 and between the planar portion 31 and the outer rail 83. However, the intermediate attachment member 3 attached to the intermediate groove 86 has the attachment groove 37 engaged with the attachment piece 88, which suppresses the movement of the planar portion 31 in the short side direction. In addition, the intermediate attachment member 3 is attached to the intermediate groove portion 86 by the engagement between the mounting groove 37 and the mounting piece 88, so it can be attached and detached from the intermediate groove portion 86. Since there is a gap between the flat portion 31 and the inner rail 82 and between the flat portion 31 and the outer rail 83, the intermediate attachment member 3 can be removed by inserting a finger into the gap and lifting it up approximately vertically, so it is easy to remove from the intermediate groove portion 86.

In this embodiment, the upper surface portion 81 in the intermediate groove portion 86 has two regions: an inclined region that slopes steeply downward from the inner rail 82 toward the outdoor side, and a horizontal region that is approximately horizontal extending from the inclined region to the outer rail 83. As shown in FIG. 4, the lower surface of the second intermediate attachment member 35 of the intermediate attachment member 3 attached to the intermediate groove portion 86 abuts against the horizontal region of the upper surface portion 81. Therefore, by making the intermediate attachment member 3 have a shape that is approximately plane-symmetrical with respect to a symmetry plane that passes through the approximate center of the cross section of the flat portion 31 and is approximately perpendicular to the flat portion 31, the intermediate attachment member 3 can be attached in the same way even when rotated 180 degrees about an axis approximately perpendicular to the flat portion 31 and attached to the intermediate groove portion 86. The intermediate attachment member 3 can be attached to the intermediate groove portion 86 without worrying about the orientation of the intermediate attachment member 3, making it easy to attach.

In this embodiment, the intermediate attachment member 3 is attached to the intermediate groove portion 86 by utilizing the attachment piece 88 provided on the upper surface portion 81 of the intermediate groove portion 86 in order to attach the cover member 98 to the intermediate groove portion 86, but the attachment piece 88 does not have to be used to attach the intermediate attachment member 3. Also, in this embodiment, the intermediate attachment member 3 is composed of two types of members, the first intermediate attachment member 34 and one or more second intermediate attachment members 35 attached to the first intermediate attachment member 34, but it may be configured without using the second intermediate attachment member 35. For example, in cases where a step is provided on the upper surface 81 of the intermediate groove 86 to which the intermediate attachment member 3 is to be attached, and the height position of the upper surface 81 differs between the indoor and outdoor sides, or where no attachment piece 88 is provided, the two legs 32 extending downward from each of the opposing long sides of the planar portion 31 of the first intermediate attachment member 34 may be extended downward until their lower ends abut the upper surface 81, so that the planar portion 31 is supported horizontally by the two legs 32, and locking pieces may be extended from near the lower ends of the two legs 32 toward the inner rail 82 or outer rail 83, respectively, and the locking pieces may be used to suppress movement of the planar portion 31 in the short side direction, in a similar configuration to the inner attachment member 2. Anything is acceptable as long as, when the intermediate attachment member 3 is attached to the intermediate groove portion 86, the flat surface portion 31 is supported so as to be approximately flush with the floor surface 13 inside the room, and a predetermined distance is maintained in the gaps between the flat surface portion 31 and the inner rail 82 and the outer rail 83.

In this embodiment, the intermediate attachment member 3 is configured such that one or more second intermediate attachment members 35 are attached to the lower part of the first intermediate attachment member 34, and the first intermediate attachment member 34 is supported by each second intermediate attachment member 35 abutting the upper surface portion 81 of the intermediate groove portion 86. Since the flat surface portion 31 is approximately flush with the floor surface 13 inside the room, a downward load is applied to the flat surface portion 31 when people pass over it, for example. The load applied to this flat surface portion 31 is transmitted from the first intermediate attachment member 34 through each second intermediate attachment member 35 to the upper surface portion 81. If the size of each second intermediate attachment member 35 is too small or if the number of second intermediate attachment members 35 attached to the first intermediate attachment member 34 is too small, there is a risk that the upper surface portion 81 may be damaged or the first intermediate attachment member 34 may be damaged, so the size of the second intermediate attachment members 35 and the number of second intermediate attachment members 35 attached to the first intermediate attachment member 34 may be appropriately designed so as to support the planar portion 31 of the first intermediate attachment member 34 approximately horizontally. The size and number required for the second intermediate attachment members 35 differ depending on the materials of the first intermediate attachment member 34 and the second intermediate attachment member 35 and the cross-sectional shape of the first intermediate attachment member 34, but usually the second intermediate attachment members 35 can be sufficiently shorter than the longitudinal length of the first intermediate attachment member 34. Therefore, a plurality of second intermediate attachment members 35 can be attached to the lower part of the first intermediate attachment member 34, and when a plurality of second intermediate attachment members 35 are attached to the first intermediate attachment member 34, the second intermediate attachment members 35 can be arranged so that there is a sufficient gap between the adjacent second intermediate attachment members 35. In the example shown in FIG. 4, the length of the two legs 32 extending downward from the flat surface 31 of the first intermediate attachment member 34 is about half the distance from the flat surface 31 to the upper surface 81. One or more second intermediate attachment members 35 are attached to this first intermediate attachment member 34 so that the first intermediate attachment member 34 can be supported, but since each second intermediate attachment member 35 is arranged with a sufficient gap between them, the cost of the intermediate attachment member 3 can be reduced compared to a case in which the legs 32 are extended downward from the flat surface 31 until they abut the upper surface 81 and the flat surface 31 is supported by the legs 32 without providing the second intermediate attachment member 35.

The intermediate groove 86 is an area where the boundary between the inner screen 71, in which the roller 73 is placed on the inner rail 82, and the outer screen 72, in which the roller 74 is placed on the outer rail 83, is located. When the opening 12 is closed by the inner screen 71 and the outer screen 72, even if the gap between the boundaries of the inner screen 71 and the outer screen 72 is closed at the screen parts, there is a possibility that outdoor wind will blow into the room through the intermediate groove 86. For this reason, when the inner screen 71 and the outer screen 72 are closed, a wind stopper member may be attached to the intermediate groove 86 in the joining area where the inner screen 71 and the outer screen 72 overlap in part to prevent wind from blowing into the room from the intermediate groove 86. When such a wind stopper member is provided in the intermediate groove 86, the intermediate attachment member 3 may be divided in the longitudinal direction so as to avoid the wind stopper member, and the intermediate attachment members 3 divided on the left and right sides of the wind stopper member may be attached. However, since the lower ends of the lower frames 75 and 76 of the existing inner and outer screens 71 and 72 are lower than the upper ends of the inner and outer rails 82 and 83, respectively, the wind stopper members attached to the intermediate grooves 86 for the inner and outer screens 71 and 72 may have upper ends that are lower than the indoor floor surface 13, or may have upper surfaces that are not flat but have slopes or steps. If such wind stopper members are left in the intermediate grooves 86 and the intermediate attachment members 3 are attached to the intermediate grooves 86, the flatness of the flat portion 31 formed in the intermediate grooves 86, which is approximately flush with the indoor floor surface 13, will be interrupted by the wind stopper member. Therefore, when installing the new inner screen 51 and the new outer screen 52 as described below after the sash bottom frame attachment 1 is attached to the existing sash bottom frame 8, if a wind stopper is required, the existing wind stopper is removed, and a new wind stopper for the new inner screen 51 and the new outer screen 52 whose upper surface is approximately flush with the floor surface 13 inside the room is installed in the intermediate groove 86, and the intermediate attachment member 3 is divided to avoid this new wind stopper. Also, regardless of the wind stopper, the intermediate attachment member 3 may be divided when, for example, the longitudinal length of the intermediate groove 86 is long.

The outer attachment member 4 is attached to the outer groove 87. As described above, the inner attachment member 2 is removably attached to the inner groove 85, and the intermediate attachment member 3 is removably attached to the intermediate groove 86. However, unlike the inner groove 85 and the intermediate groove 86, the outer groove 87 does not have a partition wall on the outdoor side. Therefore, the outer attachment member 4 is fixed to the outer groove 87 so that the outer attachment member 4 attached to the outer groove 87 does not fall off from the outdoor side. However, in cases where a side wall similar to the side wall 84 provided on the indoor side of the inner groove 85 is provided on the outdoor side of the outer groove 87, the outer attachment member 4 may be removably attached to the outer groove 87 in the same way as the inner attachment member 2 and the intermediate attachment member 3.

In this embodiment, as shown in FIG. 4, the outer attachment member 4 is composed of a first outer attachment member 41 and a second outer attachment member 47. The first outer attachment member 41 and the second outer attachment member 47 are longitudinal members with approximately the same cross-sectional shape that extend along the longitudinal direction of the outer groove portion 87.

The first outer attachment member 41 includes a base portion 42 that is placed on the upper surface portion 81 of the outer groove portion 87, a standing plate portion 43 that rises upward from the base portion 42, and an attachment portion 44 for attaching the second outer attachment member 47.

The base plate 42 is a plate-like portion that covers the upper surface 81 of the outer groove 87. In this embodiment, since the existing screen rail 89 is provided on the outdoor side edge of the upper surface 81 of the outer groove 87, the base plate 42 is provided with a groove 421 that can accommodate the existing screen rail 89 inside so that it is not interfered with when the base plate 42 is placed on the upper surface 81 of the outer groove 87. Therefore, the cross-sectional shape of the base plate 42 extends from the vicinity of the base end of the outer rail 83 along the upper surface 81 to the outdoor side, and a roughly inverted U-shaped groove 421 is formed at the existing screen rail 89, and then extends again to the outdoor side along the upper surface 81.

The standing plate portion 43 is a plate-shaped portion that rises upward from the base plate portion 42, and in this embodiment, the upper end of the standing plate portion 43 is used as a rail for the screen door. Therefore, when the first outer attachment member 41 is attached to the outer groove portion 87, the standing plate portion 43 is approximately parallel to the outer rail 83, and the height position of the upper end of the standing plate portion 43 is approximately equal to the height position of the floor surface 13 inside the room. Also, in this embodiment, the standing plate portion 43 rises upward from the top of the groove portion 421 of the base plate portion 42 so that the cross-sectional position of the existing screen door rail 89 and the cross-sectional position of the rail of the screen door to be newly installed by the upper end of the standing plate portion 43 are approximately equal.

The mounting portion 44 is provided on the side surface of the outer rail 83 of the standing plate portion 43, and serves to mount the second outer attachment member 47 to the first outer attachment member 41. In this embodiment, it is made up of a band-shaped horizontal portion that extends approximately horizontally from the middle of the height direction of the standing plate portion 43 toward the outer rail 83, and a band-shaped vertical portion that is approximately perpendicular to the horizontal portion and is provided at the extending tip edge of the horizontal portion, and a gap of a width that allows a screw to be inserted is provided between the vertical portion of the mounting portion 44 and the outer rail 83.

The first outer attachment member 41 is fixed to the outer groove 87 by placing the base plate 42 on the top surface 81 so that the mounting portion 44 faces the outer rail 83 and covers the top surface 81 of the outer groove 87, and then passing a screw through the gap between the mounting portion 44 and the outer rail 83 to fasten the base plate 42 to the top surface 81 with a screw.

In this embodiment, the first outer attachment member 41 is provided with a locking portion 45 on the outdoor side of the vertical plate portion 43, which is made up of a band-shaped horizontal portion extending substantially horizontally from a position slightly lower than the upper end of the vertical plate portion 43 toward the outdoor side, and a locking piece portion extending downward from the extending tip edge of the horizontal portion. The height position of the horizontal portion of the locking portion 45 is set at a height position such that the rollers and lower end of the screen door provided at the upper end of the vertical plate portion 43 do not interfere with the horizontal portion 43, because the upper end of the vertical plate portion 43 is a rail for the screen door. In addition, the substrate portion 42 on the outdoor side of the groove portion 421 extends substantially horizontally toward the outdoor side, and the distance from the extending tip edge of the outdoor side of the substrate portion 42 from the vertical plate portion 43 is substantially equal to the distance from the extending tip edge of the horizontal portion of the locking portion 45 from the vertical plate portion 43, and the locking piece 46 extends upward from the extending tip edge of the outdoor side of the substrate portion 42. The locking piece portion and the locking piece 46 of the locking portion 45 are arranged to face each other at approximately the same distance from the vertical plate portion 43, and various adapters, etc. can be attached to the first outer attachment member 41 using the locking piece portion and the locking piece 46 of the locking portion 45. For example, as shown in FIG. 5, when it is desired to form an outdoor floor 18 that is continuous with the bottom side of the opening 12 on the outdoor side of the opening 12, an auxiliary adapter, etc. for providing the outdoor floor 18 can be attached.

The second outer attachment member 47 has an engagement portion 48 that engages with the mounting portion 44, and a flat portion 49 that is approximately flush with the floor surface 13 inside the room when the outer attachment member 4 is attached to the outer groove portion 87. The second outer attachment member 47 is adapted to be attached to the first outer attachment member 41 that is fixed to the upper surface portion 81 of the outer groove portion 87, and is attached by engaging the engagement portion 48 with the mounting portion 44. The outer attachment member 4 is attached to the outer groove portion 87 by fixing the first outer attachment member 41 to the upper surface portion 81 of the outer groove portion 87 and attaching the second outer attachment member 47 to the first outer attachment member 41.

When the outer attachment member 4 is attached to the outer groove 87, the flat surface 49 is approximately flush with the floor surface 13 inside the room, and is approximately rectangular in shape with a long length in the longitudinal direction of the outer groove 87, and a gap of a predetermined distance is provided between the flat surface 49 and the outer rail 83. In this embodiment, the upper end of the standing plate 43 is used as a rail for a new screen door, so that the rollers and lower end of the screen door provided at the upper end of the standing plate 43 do not interfere with each other, and a gap of a predetermined distance is also provided between the flat surface 49 and the standing plate 43, and the flat surface 49 is located between the outer rail 83 and the standing plate 43. If it is not necessary to provide a rail for a new screen door, the height position of the upper end of the standing plate 43 may be lower than the height position of the floor surface 13 inside the room, and the flat surface 49 may be extended to the outside.

When the outer attachment member 4 is constructed from a single member by integrating the first outer attachment member 41 and the second outer attachment member 47, a gap of a width that allows a screw to be inserted between the flat surface 49 and the outer rail 83 is required to fix the outer attachment member 4 to the upper surface 81, so the flat surface 49 may become smaller than desired. However, in this embodiment, the outer attachment member 4 is constructed from two members, the first outer attachment member 41 and the second outer attachment member 47, and the second outer attachment member 47, which has a flat surface 49 that is approximately flush with the floor surface 13 inside the room, is attached to the first outer attachment member 41 fixed to the upper surface 81 of the outer groove 87, so that a flat surface 49 of the desired size can be formed in the outer groove 87.

The first outer attachment member 41 is fixed to the outer groove 87 by screwing the base plate 42 to the upper surface 81 of the outer groove 87, so that a hole is opened in the upper surface 81 of the outer groove 87 by a screw. Although the screw is fastened to the hole formed in the upper surface 81 by the screw, it cannot be said that there is no possibility that water such as rain will seep into the lower part of the upper surface 81 through a small gap. However, in the outdoor side member 92 constituting the outdoor side of the existing sash lower frame 8 according to this embodiment, as shown in FIG. 4, a hollow space 94 is formed in the lower part of the upper surface 81, and the tip of the screw is stopped within the hollow space 94. Since the floor surface of the hollow space 94 is inclined downward toward the outdoor side, if water seeps into the hollow space 94, the water flows along the floor surface to the outdoor side. Therefore, simply by providing a drainage hole 95 that penetrates through to the hollow space 94 on the outdoor side of the outdoor-side member 92, even if water seeps into the hollow space 94 below the upper surface portion 81 through the screw hole formed in the upper surface portion 81, the water can be drained to the outdoors through the drainage hole 95.

As described above, the sash bottom frame attachment 1 comprises an inner attachment member 2, an intermediate attachment member 3 and an outer attachment member 4 which are respectively attached to three groove portions, namely, an inner groove portion 85, an intermediate groove portion 86 and an outer groove portion 87, formed in the existing sash bottom frame 8. The inner attachment member 2 has a flat surface 21 that is approximately flush with the indoor floor surface 13 when attached to the inner groove portion 85, the intermediate attachment member 3 has a flat surface 31 that is approximately flush with the indoor floor surface 13 when attached to the intermediate groove portion 86, and the outer attachment member 4 has a flat surface 49 that is approximately flush with the indoor floor surface 13 when attached to the outer groove portion 87. By attaching the sash bottom frame attachment 1 to the existing sash bottom frame 8, flat surfaces 21, 31 and 49 that are approximately flush with the indoor floor surface 13 are formed in the inner groove portion 85, intermediate groove portion 86 and outer groove portion 87, which have an upper surface portion 81 that is lower in height than the indoor floor surface 13 as their bottom surface, and there is no step from the indoor floor surface 13 to the upper surface portion 81 of each groove portion. In this embodiment, the outer attachment member 4 has a vertical plate portion 43 on the outdoor side of the flat portion 49, the upper end of which is used as a rail for a new screen door when attached to the outer groove portion 87, and the height position of the upper end of the vertical plate portion 43 is also aligned approximately equal to the height position of the indoor floor surface 13. Therefore, by attaching the sash bottom frame attachment 1 to the existing sash bottom frame 8, the indoor floor surface 13 to the outdoor end of the outer attachment member 4 provided on the outdoor side of the existing sash bottom frame 8 is connected flatly and approximately flush with the indoor floor surface 13 without any steps, and the existing sash bottom frame 8 can be made into a fully flat sash by the sash bottom frame attachment 1.

When the sash frame attachment 1 is attached to the existing sash frame 8, a gap of a predetermined distance is provided between the flat portion 21 and the inner rail 82, between the flat portion 31 and the inner rail 82, between the flat portion 31 and the outer rail 83, and between the flat portion 49 and the outer rail 83, i.e., on both sides of the inner rail 82 and the outer rail 83. Therefore, with the sash frame attachment 1 attached to the existing sash frame 8, the shoji door wheels can be engaged with the inner rail 82 and the outer rail 83, respectively. Therefore, with the sash frame attachment 1, even after the sash frame attachment 1 is attached to the existing sash frame 8 to make it a full flat sash, a shoji door can be provided in the opening 12 using the inner rail 82 and outer rail 83 of the existing sash frame 8. In this case, as shown in FIG. 2, the height position of the lower surface of the lower frame 75 and lower frame 76 of the inner and outer screens 71 and 72 installed in the opening 12 before the sash bottom frame attachment 1 is installed is lower than the height position of the upper end of the inner rail 82 and outer rail 83. Therefore, after the sash bottom frame attachment 1 is installed to the existing sash bottom frame 8, the lower parts of the inner screen 71 and outer screen 72 interfere with the flat surface portion 21, flat surface portion 31, and flat surface portion 49 formed in the inner groove portion 85, intermediate groove portion 86, and outer groove portion 87, respectively. Therefore, the inner screen 71 and outer screen 72 cannot be used as they are, and it is necessary to install a new inner screen 51 in place of the inner screen 71 and a new outer screen 52 in place of the outer screen 72, as shown in FIG. 5.

The newly installed inner shoji 51 and the newly installed outer shoji 52 are similar to the inner shoji 71 and the outer shoji 72 in that their respective rollers run on the inner rail 82 or the outer rail 83, and are guided along the inner rail 82 or the outer rail 83. Since the newly installed inner shoji 51 and the newly installed outer shoji 52 and the inner shoji 71 and the outer shoji 72 use the same inner rail 82 and outer rail 83, the rollers 53 of the newly installed inner shoji 51 can be the same size as the rollers 73 of the inner shoji 71, and the rollers 54 of the newly installed outer shoji 52 can be the same size as the rollers 74 of the outer shoji 72. However, unlike the bottom frame 75 of the inner screen 71 and the bottom frame 76 of the outer screen 72, the bottom surface of the bottom frame 55 of the new inner screen 51 and the bottom frame 56 of the new outer screen 52 are slightly higher than the floor surface 13 inside the room, so that when the new inner screen 51 and the new outer screen 52 move along the inner rail 82 or outer rail 83, they do not interfere with the flat surface 21, flat surface 31, and flat surface 49 that are approximately flush with the floor surface 13 inside the room and are formed in the inner groove 85, intermediate groove 86, and outer groove 87 by the sash bottom frame attachment 1.

The rollers 53 of the newly installed inner shoji screen 51 and the rollers 54 of the newly installed outer shoji screen 52 are arranged to be housed inside the bottom frames 55 and 56, respectively, but the height positions of the undersides of the bottom frames 55 and 56 are slightly higher than the height position of the floor surface 13 inside the room, and the height positions of the upper ends of the inner rail 82 and outer rail 83 are approximately the same as the height position of the floor surface 13 inside the room or lower than the height position of the floor surface 13 inside the room, so that the rollers 53 and 54 engage with the inner rail 82 and outer rail 83 so as to protrude partially downward from the undersides of the bottom frames 55 and 56, respectively. The rollers 53 of the newly installed inner shoji screen 51 and the rollers 54 of the newly installed outer shoji screen 52 can be equivalent to the rollers 73 of the inner shoji screen 71 and the rollers 74 of the outer shoji screen 72, respectively, and are placed on the same inner rails 82 and outer rails 83.Therefore, the height position of the upper end of the space required to accommodate the rollers 53 inside the bottom frame 55 of the newly installed inner shoji screen 51 and the height position of the upper end of the space required to accommodate the rollers 54 inside the bottom frame 56 of the newly installed outer shoji screen 52 are approximately equal to the height position of the upper end of the space required to accommodate the rollers 73 inside the bottom frame 75 of the inner shoji screen 71 and the height position of the upper end of the space required to accommodate the rollers 74 inside the bottom frame 76 of the outer shoji screen 72, respectively. Therefore, the bottom frame 55 of the newly installed inner screen 51 and the bottom frame 56 of the newly installed outer screen 52 need to be raised in height position compared to the bottom frame 75 of the inner screen 71 and the bottom frame 76 of the outer screen 72, respectively, but the height position of the upper end can be made approximately the same, so that the opening 12 in which the newly installed inner screen 51 and the newly installed outer screen 52 are installed does not give the impression of being smaller in size compared to the opening 12 in which the inner screen 71 and the outer screen 72 are installed.

Since there is a small gap between the underside of the bottom frame 55 and the bottom frame 56 and the flat portion 21, the flat portion 31, and the flat portion 49, there is a possibility that wind, rain, etc. may blow in from the outdoors into the room through this gap. For this reason, a hanging part 57 is provided on the underside of the bottom frame 55, and a hanging part 58 is provided on the underside of the bottom frame 56. The hanging part 57 is a longitudinal member extending in the longitudinal direction of the bottom frame 55, which is formed in a substantially inverted U-shaped cross section by an upper surface abutting the underside of the bottom frame 55 and an outdoor side hanging surface and an indoor side hanging surface extending downward from the opposing ends of the upper surface, respectively, and the hanging part 58 is a longitudinal member extending in the longitudinal direction of the bottom frame 56, which is formed in a substantially inverted U-shaped cross section by an upper surface abutting the underside of the bottom frame 56 and an outdoor side hanging surface and an indoor side hanging surface extending downward from the opposing ends of the upper surface, respectively. The height positions of the lower ends of the outdoor hanging surface and the indoor hanging surface of the hanging portion 57 are lower than the height position of the upper end of the inner rail 82, so that the upper part of the inner rail 82 is sandwiched between the outdoor hanging surface and the indoor hanging surface of the hanging portion 57. In addition, the height positions of the lower ends of the outdoor hanging surface and the indoor hanging surface of the hanging portion 58 are lower than the height position of the upper end of the outer rail 83, so that the upper part of the outer rail 83 is sandwiched between the outdoor hanging surface and the indoor hanging surface of the hanging portion 58. Therefore, the hanging portion 57 and the hanging portion 58 can prevent rain, wind, etc. from entering the indoor side from the outdoor side at the lower side of the newly installed inner shoji screen 51 and the newly installed outer shoji screen 52.

In this way, the new inner screen 51 and the new outer screen 52 are provided with hanging parts 57 and 58 having outdoor side hanging surfaces and indoor side hanging surfaces that extend downward from the bottom surfaces of the bottom frames 55 and 56, respectively, and the height positions of the lower ends of the hanging parts 57 and 58 are lower than the height positions of the upper ends of the inner rail 82 and the outer rail 83, respectively. Therefore, the gaps provided between the flat surface portion 21 and the inner rail 82, between the flat surface portion 31 and the inner rail 82, between the flat surface portion 31 and the outer rail 83, and between the flat surface portion 49 and the outer rail 83, respectively, can accommodate the hanging parts 57 and 58, and are spaced so that the hanging parts 57 and 58 do not interfere with each other when the new inner screen 51 and the new outer screen 52 move along the inner rail 82 and the outer rail 83, respectively. In order to increase the continuity of the bottom edge of the opening 12 from the indoor floor surface 13, which is achieved by turning the existing sash sash 8 into a fully flat sash using the sash sash attachment 1, it is preferable to make the distance between these gaps as narrow as possible.

In this embodiment, an example is shown in which two screens, an inner screen 71 and an outer screen 72, are provided at the opening 12, and two rails, an inner rail 82 and an outer rail 83, for guiding the inner screen 71 and the outer screen 72 are provided at the existing sash bottom frame 8. However, if three or more screens for opening and closing the opening 12 are provided at the opening 12 and the existing sash bottom frame 8 is provided with three or more rails corresponding to each screen, the sash bottom frame attachment 1 includes attachment members that are attached to each of the grooves, namely, the indoor side groove portion corresponding to the inner groove portion 85 formed in the existing sash bottom frame 8, the outdoor side groove portion corresponding to the outer groove portion 87, and the groove portion between the rails corresponding to the intermediate groove portion 86 which is one less than the number of rails, and a flat portion that is approximately flush with the indoor floor surface 13 is formed in each groove. Also, for example, in the case where only one shoji screen for opening and closing the opening 12 is provided in the opening 12 by providing a door pocket capable of storing the shoji screen in the outer wall 11 that opens on the side of the opening 12, and only one rail for guiding the shoji screen is provided in the existing sash bottom frame 8, the sash bottom frame attachment 1 has two attachment members that are respectively attached to two grooves corresponding to the inner groove 85 and the outer groove 87 formed in the existing sash bottom frame 8. In this way, the sash bottom frame attachment 1 may be configured to have attachment members that are attached to each groove according to the grooves formed in the existing sash bottom frame 8.

Next, a method of remodeling an existing sash lower frame 8 using the sash lower frame attachment 1 according to the present embodiment will be described. The sash lower frame attachment 1 is used to remodel an existing sash lower frame 8 provided at the lower edge of an opening 12 that is formed in an exterior wall 11 that separates the interior and exterior of an existing house and opens up to the height of the floor surface 13 inside the house, as shown in Figures 1 and 2, into a full flat sash. In this embodiment, as shown in Figure 2, the existing sash lower frame 8 includes an inner rail 82 and an outer rail 83 that extend approximately parallel to each other along the longitudinal direction of the lower edge of the opening 12 so as to protrude upward from the upper surface portion 81, and the existing sash lower frame 8 has an inner groove portion 85, an intermediate groove portion 86, and an outer groove portion 87 formed by the upper surface portion 81, the inner rail 82, and the outer rail 83. The inner rail 82 and the outer rail 83 are provided with an inner screen 71 and an outer screen 72, respectively, and cover members 97 and 98 are attached to the inner groove portion 85 and the intermediate groove portion 86, respectively. In addition, a wind stopper member may be attached to the intermediate groove portion 86 in the area where the inner rail 82 and the outer rail 83 meet.

When renovating an existing sash sill 8 using the sash sill attachment 1, first remove the inner screen 71 and outer screen 72 and cover members 97, 98 attached to the existing sash sill 8 as shown in Figure 2, and if a wind stopper is provided in the intermediate groove 86, remove the wind stopper as well, leaving nothing attached to the inner groove 85, intermediate groove 86, and outer groove 87 of the existing sash sill 8 as shown in Figure 3. Then, attach the inner attachment member 2, intermediate attachment member 3, and outer attachment member 4 of the sash sill attachment 1 to the inner groove 85, intermediate groove 86, and outer groove 87, respectively, as shown in Figure 4.

When attaching the inner attachment member 2 to the inner groove 85, the inner attachment member 2 is attached by fitting it into the inner groove 85 from above with the flat surface 21 of the inner attachment member 2 facing upward, so that the flat surface 21 is approximately flush with the floor surface 13 inside the room. When attaching the intermediate attachment member 3 to the intermediate groove 86, one or more second intermediate attachment members 35 are attached to the bottom of the first intermediate attachment member 34, and the intermediate attachment member 3 is attached by fitting it into the intermediate groove 86 from above with the flat surface 31 of the intermediate attachment member 3 facing upward, so that the flat surface 31 is approximately flush with the floor surface 13 inside the room. If a wind-stop member is required for the newly installed inner screen 51 and the newly installed outer screen 52 that will be newly installed after renovation using the sash bottom frame attachment 1, a wind-stop member whose upper surface is approximately flush with the floor surface 13 inside the room is attached to the intermediate groove portion 86 in the joining area of the newly installed inner screen 51 and the newly installed outer screen 52, and an intermediate attachment member 3 that is divided to avoid the wind-stop member is attached to the intermediate groove portion 86. When attaching the outer attachment member 4 to the outer groove 87, first, place the base plate portion 42 of the first outer attachment member 41 on the upper surface portion 81 of the outer groove 87, and screw the base plate portion 42 to the upper surface portion 81 to fix the first outer attachment member 41 to the outer groove 87. Then, attach the second outer attachment member 47 to the first outer attachment member 41 by engaging the engagement portion 48 of the second outer attachment member 47 with the mounting portion 44 of the first outer attachment member 41, so that the flat portion 49 of the second outer attachment member 47 is approximately flush with the floor surface 13 inside the room.

The first outer attachment member 41 is fixed to the outer groove 87 by screwing the base plate 42 of the first outer attachment member 41 to the upper surface 81 of the outer groove 87. If a hollow space 94 with a floor surface that slopes downward toward the outdoors is formed below the upper surface 81 of the outer groove 87 as shown in FIG. 4, the screws used to screw the base plate 42 to the upper surface 81 are long enough that the tips of the screws remain within the hollow space 94, and drainage holes 95 that connect the hollow space 94 to the outdoors are provided on the side of the existing sash lower frame 8 that separates the hollow space 94 from the outdoors.

The sash bottom frame attachment 1 is attached to the existing sash bottom frame 8, and the inner groove portion 85, the intermediate groove portion 86, and the outer groove portion 87 form flat surfaces 21, 31, and 49 that are approximately flush with the floor surface 13 inside the room. A predetermined gap is provided between the flat surfaces 21, 31, and 49 and the inner rail 82 and the outer rail 83, respectively, so that when a new inner screen 51 and a new outer screen 52 are installed in the opening 12, the inner rail 82 and the outer rail 83 of the existing sash bottom frame 8 can be used without installing new rails, as shown in Figure 5.

In this way, the sash bottom frame attachment 1 includes an inner attachment member 2, an intermediate attachment member 3, and an outer attachment member 4 that are attached to the inner groove portion 85, the intermediate groove portion 86, and the outer groove portion 87 that are formed in the existing sash bottom frame 8 by the inner rail 82 and the outer rail 83 for guiding the shoji screen, respectively. The sash bottom frame attachment 1 forms flat portions 21, 31, and 49 that are approximately equal to the floor surface 13 inside the room in each groove portion, turning the existing sash bottom frame 8 into a fully flat sash.

The inner attachment member 2 and intermediate attachment member 3 are attached to the inner groove portion 85 and intermediate groove portion 86, respectively, except for the outer groove portion 87, which is the groove portion closest to the outside. Since they can be attached by simply fitting them in without the need for tools, they are removable and easy to install. In addition, since holes are not drilled in the upper surface portion 81 of the inner groove portion 85 and intermediate groove portion 86 by attaching the inner attachment member 2 and intermediate attachment member 3, water that has entered the inner groove portion 85 and intermediate groove portion 86 after the inner attachment member 2 and intermediate attachment member 3 are attached flows over the upper surface portion 81 of the existing sash lower frame 8 and is discharged to the outside without the need for new water sealing.

The outer attachment member 4 is attached to the outer groove 87, which is the groove closest to the outside. The first outer attachment member 41 is fixed to the outer groove 87 so that the outer attachment member 4 does not fall off from the outside side of the outer groove 87, and the second outer attachment member 47 is detachably attached to the first outer attachment member 41 fixed to the outer groove 87. The first outer attachment member 41 is fixed by screwing the base plate 42 to the upper surface 81 of the outer groove 87, so that a hole is opened in the upper surface 81 of the outer groove 87 by screwing. However, since the screw is screwed into this hole, most of the water that has entered the outer groove 87 flows over the base plate 42 and the upper surface 81 of the existing sash lower frame 8 and is discharged to the outside. Even if a small amount of water seeps into the hollow space 94 at the bottom of the upper surface 81 through the screw hole, it is discharged to the outside through the water drainage hole 95. In this way, the first outer attachment member 41 is fixed to the outer groove 87, but installation is simple since it only requires screwing the base plate 42 and the top surface 81 together, and water sealing is also easy since it only requires providing a drainage hole 95.

As described above, by using the sash bottom frame attachment 1 according to this embodiment, the existing sash bottom frame 8 provided at the bottom edge of the opening 12 that is a bay window formed in the exterior wall 11 of an existing house can be easily remodeled to become a full flat sash. If an outdoor floor 18 such as a deck or terrace is provided at a height position approximately equal to the height position of the indoor floor surface 13 on the outdoor side of the opening 12 where the existing sash bottom frame 8 that has been made into a full flat sash by the sash bottom frame attachment 1 is provided, as shown in Figures 5 and 6, the indoor floor surface 13 and the floor surface of the outdoor floor 18 are approximately flush with each other through the bottom edge of the opening 12, so that the outdoor floor 18 can be made into a semi-outdoor space that gives the feeling that the indoor space has been spatially expanded and gives a sense of openness that continues from the indoors to the outdoors. Therefore, even in an existing house, a semi-outdoor space can be easily provided by remodeling using the sash bottom frame attachment 1.

REFERENCE SIGNS LIST 1 sash bottom frame attachment 11 exterior wall 12 opening 13 indoor floor surface 18 outdoor floor 2 inner attachment member (attachment member)
21 Plane portion 3 Intermediate attachment member (attachment member)
31 Plane portion 4 Outer attachment member (attachment member)
49 Flat surface 51 Newly installed inner screen (newly installed screen)
52 Newly installed outside screen (newly installed screen)
71 Inner Shoji ((Existing) Shoji)
72 Outside Shoji ((Existing) Shoji)
8 Existing sash bottom frame 81 Top surface 82 Inner rail (rail)
83 Outer rail (rail)
85 Inner groove (groove)
86 Intermediate groove portion (groove portion)
87 Outer groove (groove)

Claims (7)

A sash bottom frame attachment that is attached to an existing sash bottom frame provided at the bottom edge of an opening formed in an exterior wall that separates the interior and exterior of an existing house,
The existing sash lower frame is
An upper surface portion that covers the lower side at a position lower than the height position of the floor surface of the room;
Two rails, an inner rail and an outer rail, for guiding a shoji screen that opens and closes the opening are provided on the upper surface portion so that the upper end is at a position approximately equal to or lower than the height position of the floor surface of the room ;
Three grooves, an inner groove, an intermediate groove, and an outer groove , each having a bottom surface of the upper surface formed by the upper surface and the two rails ;
Equipped with
The sash bottom frame attachment is
a plurality of attachment members each attached to each of the grooves,
An inner attachment member attached to the inner groove, an intermediate attachment member attached to the intermediate groove, and an outer attachment member attached to the outer groove,
the inner attachment member, the intermediate attachment member, and the outer attachment member each have a flat surface that is at a height position substantially equal to a height position of a floor surface of the room when attached to the corresponding inner groove portion, the intermediate groove portion, and the outer groove portion ;
the inner attachment member, the intermediate attachment member, and the outer attachment member are removably attached to the corresponding inner groove portion, the intermediate groove portion, and the outer groove portion;
The outer attachment member attached to the outer groove portion on the most outdoor side is fixed to the outer groove portion,
A side wall is formed upward from the upper surface portion to the floor surface of the room,
A gap is formed between the planar portion of the inner attachment member and the inner rail and between the planar portion of the inner attachment member and the side wall,
A gap is formed between the planar portion of the intermediate attachment member and the inner rail and between the planar portion of the intermediate attachment member and the outer rail,
A gap is formed between the flat surface of the outer attachment member and the outer rail.
Attachment for sash bottom frame. The outer attachment member is composed of a first outer attachment member and a second outer attachment member,
The first outer attachment member has an attachment portion formed separately from the outer rail so that a screw can be inserted therethrough, and a base portion that is fixed onto the upper surface portion of the outer groove portion with a screw,
The second outer attachment member includes an engagement portion that engages with the mounting portion, and a flat portion that is substantially flush with a floor surface of the room when the outer attachment member is attached to the outer groove portion.
2. An attachment for a sash sill as claimed in claim 1. The inner attachment member is provided with two legs each extending downward from the planar portion,
When the inner attachment member is attached to the inner groove portion, one of the legs abuts against the side wall or a small protruding piece formed on the side wall,
The other leg abuts against the inner rail.
3. An attachment for a sash sill as claimed in claim 1 or 2. The intermediate attachment member has two legs and horizontally supports the planar portion with the two legs.
3. The sash frame attachment according to claim 1, wherein said two legs have locking pieces extending from their lower ends to said inner rail and said outer rail. A method for remodeling an existing sash sash provided at a lower edge of an opening formed in an exterior wall that separates the interior and exterior of the existing house using the sash sash attachment according to any one of claims 1 to 4,
The upper surface portion covers the lower side at a position lower than the height position of the floor surface of the room;
Two rails, the inner rail and the outer rail, for guiding the shoji screen that opens and closes the opening, the upper end of which is provided on the upper surface portion so as to be at a position approximately equal to or lower than the height position of the floor surface of the room ;
Three grooves, namely, the inner groove, the intermediate groove, and the outer groove, each having a bottom surface on the upper surface formed by the upper surface and the two rails ;
For the three grooves of the existing sash lower frame,
A renovation method characterized by forming a flat portion in the three groove portions at a height position approximately equal to the height position of the floor surface inside the room by attaching three attachment members, namely the inner attachment member, the intermediate attachment member, and the outer attachment member of the sash bottom frame attachment. The remodeling method described in claim 5, characterized in that an outdoor floor is provided on the outdoor side of the opening at a height position approximately equal to the height position of the indoor floor surface, and the indoor floor surface is connected to the outdoor floor surface at approximately the same level via the lower side of the opening. A gap having a predetermined interval is provided between the planar portions of the three attachment members and the two rails,
The remodeling method according to claim 5 or 6, characterized in that a new shoji screen is installed in the opening, the new shoji screen being guided by each of the two rails.

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