JP7585774B2 - Window structure - Google Patents

Description

The present invention relates to a window structure having a window sill and a sash frame.

A window structure is known that includes a window sill and a sash frame supported by the window sill. The sash frame is rectangular and is assembled by connecting a lower sash frame, an upper sash frame, and a pair of vertical sash frames on the left and right sides with screws or the like.

A waterproof sheet is attached to the exterior surface of the wall member. The waterproof sheet is covered by an exterior wall panel. Rainwater running through the window flows down the sash frame onto the outer surface of the exterior wall panel.

On the other hand, Patent Document 1 discloses a daylight window. This daylight window comprises a rectangular wooden lower frame, a rectangular decorative upper frame attached to the wooden lower frame, and window glass that closes the opening of the decorative upper frame. The decorative upper frame covers the outer periphery of the main surface of the rectangular wooden lower frame. The inner periphery of the main surface of the wooden lower frame is covered by the window glass. The wooden lower frame has a drain groove recessed from the main surface. The drain groove extends from the inside to the outside of the rectangular wooden lower frame. Water that condenses on the inner surface of the window glass flows into the wooden lower frame that covers the edge of the window glass. The water that flows into the wooden lower frame is drained from the inside to the outside of the wooden lower frame through the drain groove.

Japanese Patent Application Publication No. 8-68174

In the above-mentioned window structure, if rainwater that has flowed down the window seeps into the gap between the sash frame and the window sill through the connection between the horizontal sash frame and the vertical sash frame, there is a risk that the window sill will rot.

The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide a window structure that can prevent the window sill from decaying due to rainwater.

(1) The window structure according to the present invention comprises a window sill extending along a horizontal arrangement direction and having an upper surface, a first side surface facing the outside, and a second side surface facing the inside, a sash bottom frame extending along the arrangement direction, and a sash frame having a vertical sash frame extending along the vertical direction and whose lower end is connected to an end of the sash bottom frame in the arrangement direction, and a waterproofing member sandwiched between the sash frame and the window sill. The sash bottom frame is located above the window sill and has a bottom frame body having a rail into which a window fits, and a covering body extending from the bottom frame body and covering an upper portion of the first side surface of the window sill. The waterproofing member has a first body sandwiched between the upper surface of the window sill and the bottom frame body, and a second body sandwiched between the first side surface of the window sill and the covering body. The first body, or the first body and the lower frame body, form a first drainage channel that extends in a width direction that intersects with the arrangement direction and the vertical direction, and the second body, or the second body and the covering body, form a second drainage channel that extends in the vertical direction and is continuous with the first drainage channel.

Rainwater that seeps in between the sash bottom frame and the waterproofing member from the connection between the sash bottom frame and the vertical sash frame is prevented from coming into contact with the window sill by the waterproofing member. The infiltrated rainwater also flows to the outside through the first drainage channel and reaches the second drainage channel, and then flows downward through the second drainage channel to be discharged to the outside. This prevents the infiltrated rainwater from remaining between the sash bottom frame and the waterproofing member and causing the area around the window sill to become humid. As a result, the window sill is prevented from rotting.

(2) The first body has a first plate-shaped portion whose main surface is aligned in a horizontal direction, and the first drainage channel is formed by a first recess recessed from the upper surface, which is the main surface, of the first plate-shaped portion; the second body has a second plate-shaped portion whose first and second main surfaces are aligned in the vertical direction and the arrangement direction and whose upper end is connected to the first plate-shaped portion; and the second drainage channel may be formed by a second recess recessed from the first main surface, which is the outdoor-facing main surface of the second plate-shaped portion.

The first and second drainage channels are formed from waterproof materials, so commercially available (general-purpose) sash frames can be used.

(3) The first body is located below the first recess and further has a first protrusion protruding from the lower surface of the first plate-shaped portion, the second body is located to the side of the second recess and further has a second protrusion protruding from the second main surface of the second plate-shaped portion, and the window sill is recessed from the upper surface and has a first fitting recess into which the first protrusion fits, and a second fitting recess is recessed from the first side surface and into which the second protrusion fits.

By providing the first and second fitting recesses on the window sill, the waterproofing member can be provided with the first and second protrusions, which can make the depth of the first and second recesses deeper than when the first and second protrusions are not provided. By making the first and second recesses deeper, it is possible to prevent infiltrating rainwater from overflowing from the first and second drainage channels. As a result, decay of the window sill can be prevented more reliably.

(4) The first body has a first plate-shaped portion whose main surface is along the horizontal direction, the second body has a second plate-shaped portion whose first and second main surfaces are along the vertical direction and the arrangement direction and whose upper end is connected to the first plate-shaped portion, and the sash lower frame may have a first protrusion protruding from the lower surface of the lower frame body and extending along the width direction, abutting against the upper surface of the first plate-shaped portion to form the first drainage channel together with the first plate-shaped portion, and a second protrusion protruding from the indoor side of the covering body and extending along the vertical direction, abutting against the first main surface, which is the outdoor main surface of the second plate-shaped portion, to form the second drainage channel together with the second plate-shaped portion.

The infiltrated rainwater flows through the first drainage channel consisting of the corner (recessed corner) formed by the first ridge and the first plate-shaped portion. The water that flows through the first drainage channel flows through the second drainage channel consisting of the corner (recessed corner) formed by the second ridge and the second plate-shaped portion.

(5) The second drainage channel may extend below the lower end of the covering body of the sash bottom frame.

The second drainage channel extends below the bottom end of the covering body of the sash bottom frame. In other words, the lower part of the second drainage channel is not covered by the covering body. Therefore, rainwater that has infiltrated is more easily drained to the outdoors than if the entire second drainage channel were covered by the covering body.

(6) The first body of the waterproofing member or the lower frame body of the sash lower frame may have a shielding portion that separates the first drainage channel from the interior of the building.

The shielding section separates the first drainage channel from the interior of the building, preventing infiltrating rainwater from being discharged into the building.

(7) The window structure according to the present invention may further include a drainage member that is attached to the outdoor surface of the wall member located around the sash frame, a portion of which is located between the second body of the waterproofing member and the covering body of the sash bottom frame, and has a running water surface through which water discharged from the second drainage channel flows.

The water discharged from the second drainage channel flows downward along the surface of the drainage member. This prevents the discharged rainwater from causing the wall member to rot.

This invention makes it possible to prevent the window sill from rotting.

FIG. 1(A) is a perspective view of a portion of a building 10 including a window structure 30, and FIG. 1(B) is a schematic cross-sectional view of the building 10 including the window structure 30. FIG. 2 is a perspective view of the window structure 30. FIG. 3 is an exploded perspective view of the window structure 30. FIG. 4 is a perspective view of the window structure 30 with the sash frame 100 removed. 5A is a cross-sectional view taken along line VA-VA in FIG. 2, and FIG. 5B is a cross-sectional view taken along line VB-VB in FIG. 6(A), (B), and (C) are explanatory diagrams relating to Modification Example 1, FIGS. 6(D), (E), and (F) are explanatory diagrams relating to Modification Example 2, and FIGS. 6(G), (H), and (I) are explanatory diagrams relating to Modification Example 3. FIG. 7 is a perspective view of a sash lower frame 101 relating to the fourth modified example. FIG. 8A is a horizontal cross-sectional view of a window structure 30 according to the fourth modified example, and FIG. 8B is a vertical cross-sectional view of the window structure 30 according to the fourth modified example.

The following describes an embodiment of the present invention. Note that the embodiment described below is merely one example of the present invention, and it goes without saying that the embodiment of the present invention can be modified as appropriate without departing from the gist of the present invention.

Figure 1 is a perspective view of a portion of a building 10 equipped with a window structure 30 according to this embodiment. The building 10 includes a foundation, structural members such as a plurality of columns and beams supported by the foundation, a wall member 21 and a window structure 30 supported by the structural members, and an exterior wall panel 23.

The exterior wall panel 23 is plate-shaped and is attached to the wall member 21. In other words, the exterior wall panel 23 covers the wall member 21. The wall panel 23 is made of, for example, concrete.

The wall member 21 has a rectangular opening 24. A window structure 30 is provided in this opening.

As shown in FIG. 2, the window structure 30 comprises a window sill 31, a waterproof member 50, a waterproof sheet 25 (FIG. 4), and a sash frame 100.

As shown in Fig. 1 (B) and Fig. 4, the waterproof sheet 25 is attached to the exterior surface 22, which is the outdoor surface of the wall member 21, the window sill 31, and the pillar 14, and is located between the wall member 21, the window sill 31, and the pillar 14 and the exterior wall panel 23 (Fig. 1). The waterproof sheet 25 prevents rainwater from coming into contact with the wall member 21 or the pillar 14, which would cause the wall member 21 or the pillar 14 to decay. The waterproof sheet 25 is an example of a drainage member.

The window sill 31 may be composed of one member or multiple members. In the example shown in FIG. 3, the window sill 31 is composed of a wooden window sill 37 and a base material 38 attached to the window sill 37. The base material 38 is, for example, wood. However, the base material 38 may be a material other than wood, such as plaster board. In other words, at least a portion of the window sill 31 is made of wood. In this embodiment, the base material 38 is described as being made of wood, such as plywood made by gluing multiple wooden boards together.

The window sill 31 is a rectangular prism extending in the left-right direction 12, and has an upper surface 32 along the horizontal direction, a pair of side surfaces 33, 34 along the up-down direction 11 and the left-right direction 12, a lower surface 35, and a pair of left and right end surfaces 36. The left-right direction 12 is a direction along the exterior wall surface of the building 10 (Figure 1) and the horizontal direction. The left-right direction 12 is an example of an arrangement direction. In the following description, of the pair of side surfaces 33, 34, the side facing the outdoors is referred to as the first side surface 33, and the side facing the indoors is referred to as the second side surface 34.

The window sill 37 is supported by a structural pillar 14. Specifically, the window sill 37 is positioned with its end face 36 abutting the side face 15 of the pillar 14, and is fixed to the pillar 14 by metal fittings, screws, etc.

The window sill portion 31 has a first fitting recess 41 recessed from the top surface 32 and a second fitting recess 42 recessed from the first side surface 33, at both ends in the left-right direction 12. In FIG. 3, only the first fitting recess 41 and the second fitting recess 42 provided at the left end of the window sill portion 31 are shown.

The first fitting recess 41 extends along the front-rear direction 13, which is a direction perpendicular to the up-down direction 11 and the left-right direction 12. The first fitting recess 41 opens to the top surface 32, end surface 36, and first side surface 33 of the window sill portion 31, but does not open to the second side surface 34. The first fitting recess 41 is formed in the window sill portion 31, for example, by an operator cutting the window sill portion 31. The first fitting recess 41 is fitted with a first protrusion 62 of the waterproofing member 50, which will be described later. In the following description, the outdoor side is referred to as the front, and the indoor side is referred to as the rear. The front-rear direction 13 is an example of the width direction.

The second fitting recess 42 extends along the up-down direction 11. The second fitting recess 42 opens to the upper surface 32, the end surface 36, and the first side surface 33 of the window sill portion 31, but does not open to the lower surface 35. The second fitting recess 42 is formed in the window sill portion 31, for example, by an operator cutting the window sill portion 31. The second fitting recess 42 is fitted into the second protrusion 72 of the waterproofing member 50.

A portion of the waterproof sheet 25 described above is attached to the lower portion of the first side surface 33 of the window sill portion 31 so as not to block the opening of the second fitting recess 42. For example, the waterproof sheet 25 is attached to the first side surface 33 of the window sill portion 31 below the second fitting recess 42. Alternatively, after the waterproof sheet 25 is attached to the first side surface 33 of the window sill portion 31, the portion that covers the opening of the second fitting recess 42 is cut off by a worker.

The waterproof member 50 is a member for preventing rainwater from coming into contact with the pillar 14 and the window sill 31. The waterproof member 50 is, for example, a resin molded product.

The waterproof member 50 includes a first body 51, a second body 52, and a third body 53. The area surrounded by a dashed line circle in FIG. 3 is a perspective view of the back side of the waterproof member 50.

The first body 51 has a first plate-shaped portion 61, a first protrusion 62, a first recess 63, and a shielding portion 64.

The first plate-shaped portion 61 has a plate-like main surface that runs horizontally. As shown in FIG. 5(A), the lower surface 65, which is one of the main surfaces of the first plate-shaped portion 61, abuts against the upper surface 32 of the window sill portion 31.

As shown in the dashed line in Figure 3, the first protrusion 62 protrudes downward from the lower surface 65 of the first plate-shaped portion 61. The first protrusion 62 extends along the front-rear direction 13. As shown in Figure 5, the first protrusion 62 fits into the first fitting recess 41 of the window sill portion 31.

As shown in FIG. 3, the first recess 63 is recessed from the upper surface 66 of the first plate-shaped portion 61. The first recess 63 extends along the front-rear direction 13. As shown in FIG. 5, the first recess 63 is located above the first protrusion 62 and is formed inside the first protrusion 62. That is, the first recess 63 can be made to be equal to or greater than the thickness of the first plate-shaped portion 61 by the first protrusion 62. Furthermore, by providing the first protrusion 62, the formation of the first recess 63 becomes easier.

The first recess 63 forms a first drainage channel that drains rainwater forward (to the outside). In other words, the first drainage channel extends along the front-to-rear direction 13.

As shown in FIG. 3, the shielding portion 64 defines the rear surface of the first recess 63. The shielding portion 64 prevents rainwater that has flowed into the first recess 63 from flowing out rearward (toward the interior).

The second body 52 has a second plate-shaped portion 71, a second protrusion 72, and a second recess 73.

The second plate-shaped portion 71 is plate-shaped with a first main surface 75 and a second main surface 76 that extend along the up-down direction 11 and the left-right direction 12. As shown in FIG. 4, the second main surface 76 of the second plate-shaped portion 71 abuts against the first side surface 33 of the window sill portion 31, the front surface 16 of the pillar 14, and the waterproof sheet 25. In other words, a portion of the waterproof sheet 25 is located between the second plate-shaped portion 71 and the window sill portion 31.

As shown in FIG. 3, the second protrusion 72 protrudes rearward from the second main surface 76 of the second plate-shaped portion 71. The second protrusion 72 extends along the up-down direction 11. As shown in FIG. 5(B), the second protrusion 72 fits into the second fitting recess 42 of the window sill portion 31.

As shown in FIG. 3, the second recess 73 is recessed from the first main surface 75 of the second plate-shaped portion 71. The second recess 73 extends along the up-down direction 11. The second recess 73 is connected to the first recess 63. The second recess 73 is located in front of the second protrusion 72 and is formed inside the second protrusion 72. In other words, the second recess 73 can be made to be equal to or greater than the thickness of the second plate-shaped portion 71 by the second protrusion 72. Furthermore, the provision of the second protrusion 72 makes it easier to form the second recess 73.

The second recess 73 forms a second drainage channel that drains rainwater downward. The second drainage channel is connected to the first drainage channel formed by the first recess 63, and extends in the vertical direction 11. Rainwater that flows downward through the second recess 73 flows downward along the outdoor surface of the waterproof sheet 25 (Figure 4). In other words, the waterproof sheet 25 prevents rainwater drained by the first and second drainage channels from coming into contact with the wall member 21. The outdoor surface of the waterproof sheet 25 is an example of a running water surface.

The third body 53 is a plate whose main surface extends along the up-down direction 11 and the front-rear direction 13. The third body 53 is connected to the first body 51 at its lower end and to the second body 52 at its front end. As shown in FIG. 4, the main surface (left side surface) of the third body 53 abuts against the side surface 15 of the pillar 14.

As shown in FIG. 1, the sash frame 100 has a rectangular frame shape. The sash frame 100 may be made of a metal such as aluminum, or may be made of a synthetic resin.

The sash frame 100 is assembled by pressing the sash lower frame 101, the sash upper frame 102, and a pair of left and right vertical sash frames 103, 104 together with screws or the like. In other words, the sash frame 100 is not made by molding the sash lower frame 101 and the sash upper frame 102 into a continuous, integral piece, nor is it made by welding the sash lower frame 101 and the sash upper frame 102 together into a continuous, integral piece, but is assembled by pressing the sash lower frame 101 and the sash upper frame 102 together with screws or the like. In the following, the portion where the sash lower frame 101 and the sash upper frame 102 are pressed together is described as a connection portion. The sash upper frame 102 and the sash vertical frames 103, 104 may be a continuous, integral piece.

As shown in FIG. 2, the sash bottom frame 101 has a bottom frame body 110 located above the window sill portion 31, and a covering body 120 that covers the upper part of the first side surface 33 of the window sill portion 31.

The lower frame body 110 has a cylindrical tubular portion 111 extending in the left-right direction 12, a number of rails 112 protruding upward from the upper surface of the tubular portion 111, and a number of abutment ribs 113 protruding downward from the lower surface of the tubular portion 111.

The rails 112 extend along the left-right direction 12. The rails 112 support the window 17 (FIG. 1) so that it can slide in the left-right direction 12. Specifically, as shown in FIG. 1(B), the window 17 includes a window pane 18 and a window frame 19 attached to the window pane 18. The rails 112 fit into recesses provided in the window frame 19.

As shown in FIG. 3, the multiple abutment ribs 113 extend along the left-right direction 12. As shown in FIG. 5, the tip (lower end) of the abutment rib 113 abuts against the upper surface 66 of the first body 51 of the waterproofing member 50. In other words, the sash bottom frame 101 is supported by the multiple abutment ribs 113 on the window sill portion 31 via the waterproofing member 50.

3, the covering body 120 includes a plate-shaped portion 121 and an abutment rib 122 protruding from the plate-shaped portion 121. The plate-shaped portion 121 protrudes downward from the front end of the lower surface of the tubular portion 111 of the lower frame body 110. The main surface of the plate-shaped portion 121 is aligned along the up-down direction 11 and the left-right direction 12. The abutment rib 122 protrudes rearward from the indoor main surface (rear surface) of the plate-shaped portion 121 and extends along the left-right direction 12. As shown in FIG. 5(B), the tip (rear end) of the abutment rib 122 abuts against the first main surface 75 of the second body 52 of the waterproofing member 50.

The sash bottom frame 101 is positioned in the up-down direction 11 and the front-rear direction 13 by the abutment ribs 113, 122 abutting against the waterproofing member 50, and is positioned in the left-right direction 12 by the end face in the left-right direction 12 abutting against the third main body 53 of the waterproofing member 50, and is then fixed to the window sill portion 31 using screws or the like. Specifically, the tubular portion 111 and the covering body 120 are each fixed to the window sill portion 31 using screws so that the abutment ribs 113, 122 press against the waterproofing member 50.

Next, referring to Figure 5, we will explain how water that has entered between the sash bottom frame 101 and the waterproofing member 50 is discharged to the outdoors.

Rainwater that flows through the window 17 (Fig. 1) seeps into the gap between the sash bottom frame 101 and the waterproofing member 50 from the connection between the sash bottom frame 101 and the vertical sash frame 103, as shown by the arrow in Fig. 5 (A). The waterproofing member 50 prevents the seeping rainwater from coming into contact with the wooden pillar 14 and the window sill 31.

The infiltrated rainwater flows into the first recess 63 of the waterproofing member 50 and flows forward through the first recess 63. At that time, the rainwater is prevented from flowing backward by the shielding portion 64.

Rainwater that flows forward in the first recess 63 reaches the second recess 73 and flows downward through the second recess 73. It is then drained onto the surface of the waterproof sheet 25, as shown by the arrow in Figure 5 (B). The drained rainwater runs down the surface of the waterproof sheet 25 (Figure 4) to the ground. In other words, rainwater that has seeped in between the sash bottom frame 101 and the waterproofing member 50 is drained outside.

[Effects of the embodiment]
In this embodiment, rainwater that has infiltrated between the sash bottom frame 101 and the waterproofing member 50 from the connection between the sash bottom frame 101 and the vertical sash frame 103 is prevented from coming into contact with the window sill 31 and the pillar 14 by the waterproofing member 50. The infiltrated rainwater is also discharged to the outdoors through the drainage channel formed by the first recess 63 and the second recess 73. This prevents the infiltrated rainwater from remaining between the sash bottom frame 101 and the waterproofing member 50 and causing the areas around the window sill 31 (the window sill 37 and the base material 38) and the pillar 14 to become humid. As a result, the window sill 31 and the pillar 14 are prevented from decaying.

In addition, in this embodiment, the first recess 63 and the second recess 73 that form the drainage channel are formed in the waterproofing member 50, so a commercially available (general-purpose) sash frame 100 can be used. As a result, the yield of the window structure 30 is improved.

In addition, in this embodiment, by providing the first fitting recess 41 and the second fitting recess 42 in the window sill 31, the first protrusion 62 and the second protrusion 72 can be provided in the waterproofing member 50. The first protrusion 62 and the second protrusion 72 can make the depth of the first recess 63 and the second recess 73 deeper than when the first protrusion 62 and the second protrusion 72 are not provided. By making the depth of the first recess 63 and the second recess 73 deeper, it is possible to prevent infiltrating rainwater from overflowing from the first recess 63 and the second recess 73. As a result, decay of the window sill 31 can be prevented more reliably.

In addition, in this embodiment, the covering body 120 of the sash bottom frame 101 does not cover the lower opening of the second recess 73 that forms the second drainage channel, so that infiltrating rainwater can be more easily drained to the outdoors than if the entire second recess 73 were covered by the covering body 120.

In addition, in this embodiment, the waterproofing member 50 is provided with a shielding portion 64, which prevents rainwater that has flowed into the first recess 63 from flowing indoors.

In addition, in this embodiment, a portion of the waterproof sheet 25 is located between the second body 52 of the waterproof member 50 and the covering body 120 of the sash bottom frame 101, so that rainwater drained from the second recess 73 flows down the waterproof sheet 25 to the ground. This prevents the drained rainwater from causing the wall member 21 to decay.

[Modification 1]
In this modified example, an example is described in which a first protrusion 131 and a first recess 132, and a second protrusion 133 and a second recess 134 shown in Figures 6 (A), (B), and (C) are provided on a waterproof member 50 instead of the first protrusion 62 and the first recess 63, and the second protrusion 72 and the second recess 73 shown in Figure 3.

As shown in FIG. 6(C), the first protrusion 131 has a cross-sectional shape of a semicircular arc or a semi-elliptical arc. The first recess 132 is located inside the first protrusion 131. Similarly, the second protrusion 133 has a cross-sectional shape of a semicircular arc or a semi-elliptical arc. The second recess 134 is located inside the second protrusion 133. The first protrusion 131 and the first recess 132 extend along the front-rear direction 13, and the second protrusion 133 and the second recess 134 extend along the up-down direction 11. The first protrusion 131 fits into the first fitting recess 41 of the window sill 31, and the second protrusion 133 fits into the second fitting recess 42 (FIG. 3) of the window sill 31.

Rainwater that seeps into the gap between the sash bottom frame 101 and the waterproofing member 50 from the connection between the sash bottom frame 101 and the vertical sash frame 103 is discharged to the outdoors through the drainage channel formed by the first recess 132 and the second recess 134. This prevents the infiltrating rainwater from remaining between the sash bottom frame 101 and the waterproofing member 50 and causing excessive humidity around the window sill 31 and the pillar 14. As a result, the window sill 31 and the pillar 14 are prevented from rotting.

[Modification 2]
In this modified example, an example is described in which a first recess 135 and a second recess 136 shown in Figures 6 (D), (E), and (F) are provided in the waterproof member 50 instead of the first protrusion 62 and the first recess 63, and the second protrusion 72 and the second recess 73 shown in Figure 3.

As shown in FIG. 6(C), the first recess 135 is formed by making the thickness of the waterproofing member 50 thinner than the thickness of the first plate-shaped portion 61. Similarly, the second recess 136 is formed by making the thickness of the waterproofing member 50 thinner than the thickness of the second plate-shaped portion 71. Note that in this modified example, the window sill portion 31 does not have the first fitting recess 41 and the second fitting recess 42 (FIG. 3).

Rainwater that seeps into the gap between the sash bottom frame 101 and the waterproofing member 50 from the connection between the sash bottom frame 101 and the vertical sash frame 103 is discharged to the outdoors through the drainage channel formed by the first recess 135 and the second recess 136. This prevents the infiltrating rainwater from remaining between the sash bottom frame 101 and the waterproofing member 50 and causing excessive humidity around the window sill 31 and the pillar 14. As a result, the window sill 31 and the pillar 14 are prevented from rotting.

In addition, in this modified example, the first drainage channel (first recess 135) and the second drainage channel (second recess 136) are formed without providing the first fitting recess 41 and the second fitting recess 42 in the window sill portion 31, which saves the worker the trouble of having to cut the window sill portion 31.

[Modification 3]
In this modified example, an example is described in which a first recess 137 and a second recess 138 shown in Figures 6 (G), (H), and (I) are provided in the waterproof member 50 instead of the first protrusion 62 and the first recess 63, and the second protrusion 72 and the second recess 73 shown in Figure 3.

As shown in FIG. 6(I), the first recess 137 is a V-shaped recess in cross section recessed from the upper surface 66 of the first plate-shaped portion 61 of the waterproofing member 50. Similarly, the second recess 136 is a V-shaped recess in cross section recessed from the first main surface 75 of the second plate-shaped portion 71. In this modified example, the window sill portion 31 does not have the first mating recess 41 and the second mating recess 42 (FIG. 3).

Rainwater that seeps into the gap between the sash bottom frame 101 and the waterproofing member 50 from the connection between the sash bottom frame 101 and the vertical sash frame 103 is discharged to the outdoors through the drainage channel formed by the first recess 137 and the second recess 138. This prevents the infiltrating rainwater from remaining between the sash bottom frame 101 and the waterproofing member 50 and causing excessive humidity around the window sill 31 and the pillar 14. As a result, the window sill 31 and the pillar 14 are prevented from rotting.

In addition, in this modified example, the first drainage channel (first recess 137) and the second drainage channel (second recess 138) are formed without providing the first fitting recess 41 and the second fitting recess 42 in the window sill portion 31, which saves the worker the trouble of having to cut the window sill portion 31.

[Modification 4]
In this modified example, an example is described in which a first convex rib 141 and a second convex rib 142 shown in Figures 7 and 8 are provided on the sash lower frame 101 instead of the first protrusion 62 and first recess 63, and the second protrusion 72 and second recess 73 shown in Figure 3.

As shown in FIG. 7, the first convex strip 141 protrudes downward from the bottom surface of the tubular portion 111. The first convex strip 141 also extends along the front-rear direction 13. The second convex strip 142 protrudes rearward from the rear surface of the plate-like portion 121 of the cover 120. The second convex strip 142 also extends along the up-down direction 11.

As shown in FIG. 8, the tip (lower end) of the first convex strip 141 abuts against the upper surface 66 of the first plate-shaped portion 61 of the waterproofing member 50. The corner (recessed corner) formed by the first convex strip 141 and the first plate-shaped portion 61 of the waterproofing member 50 forms a first drainage channel extending along the front-rear direction 13.

The tip (rear end) of the second convex strip 142 abuts against the front surface of the second plate-shaped portion 71 of the waterproofing member 50. The corner (recessed corner) formed by the second convex strip 142 and the second plate-shaped portion 71 of the waterproofing member 50 forms a second drainage channel extending along the up-down direction 11.

Rainwater that seeps into the gap between the sash bottom frame 101 and the waterproofing member 50 from the connection between the sash bottom frame 101 and the vertical sash frame 103 is drained to the outdoors through the first drainage channel formed by the first convex strip 141 and the first plate-shaped portion 61 of the waterproofing member 50, and the second drainage channel formed by the second convex strip 142 and the second plate-shaped portion 71 of the waterproofing member 50. This prevents the infiltrating rainwater from remaining between the sash bottom frame 101 and the waterproofing member 50 and causing excessive humidity around the window sill 31 and the pillar 14. As a result, the window sill 31 and the pillar 14 are prevented from rotting.

[Other Modifications]
In the above embodiment, the window structure 30 is described as being used for the horizontally elongated window 17 (FIG. 1). However, the window structure 30 may be used for a vertically elongated window.

In the above embodiment, an example was described in which the rail 112 (FIG. 3) into which the window 17 fits is provided on the cylindrical portion 111. That is, a sash lower frame 101 having a cylindrical portion 111 was described. However, the portion of the sash lower frame 101 that holds the rail 112 may be plate-shaped or may have another shape. Also, in the above embodiment, an example was described in which the covering body 120 of the sash lower frame 101 is plate-shaped. However, the covering body 120 may have a shape other than a plate-shaped, such as a cylindrical shape. That is, the present invention can be used with various sash lower frames 101.

In the above embodiment, an example has been described in which the waterproof sheet 25 is attached to the outer surface 22, which is the outdoor surface of the wall member 21, the window sill portion 31, and the pillar 14. However, instead of the waterproof sheet 25, a surface material such as a synthetic resin thin plate or a steel plate may be attached to the outer surface 22, the window sill portion 31, and the pillar 14 of the wall member 21. Rainwater that flows downward through the second recess 73 flows downward along the outdoor surface of the surface material. In other words, the surface material prevents rainwater drained by the first drainage channel and the second drainage channel from contacting the wall member 21. The surface material is an example of a drainage member. The outdoor surface of the surface material is an example of a running water surface.

10... Building 11... Up and down direction 12... Left and right direction (layout direction)
13...Anteroposterior direction (width direction)
14... Pillar 17... Window 21... Wall member 23... Exterior wall panel 25... Waterproof sheet 30... Window structure 31... Window sill 32... Upper surface 33... First side surface 34, second side surface 37, window sill 38, base material 41, first fitting recess 42, second fitting recess 50, waterproof member 51, etc. First body 52, second body 53, third body 61, first plate-shaped portion 62, 131, first protrusion 63, 132, 135, 137, first recess 71: second plate-shaped portion 72, 133: second protrusion 73, 134, 136, 138: second recess 75: first main surface 76: second main surface 100 Sash frame 101: Sash bottom frame 103, 104: Sash vertical frame 141: First convex strip 142: Second convex strip

Claims (5)

A window sill portion extending along a horizontal arrangement direction and having a top surface, a first side surface facing the exterior, and a second side surface facing the interior;
a sash frame including a sash bottom frame extending along the arrangement direction and a sash vertical frame extending along the up-down direction, the lower end of which is connected to an end of the sash bottom frame in the arrangement direction;
A waterproof member is sandwiched between the sash frame and the window sill,
The above sash bottom frame is
A lower frame body is located above the window sill and has a rail into which the window fits;
A covering body extending from the lower frame body and covering an upper portion of the first side surface of the window sill portion,
The waterproof member is
A first body sandwiched between an upper surface of the window sill and the lower frame body;
a second body sandwiched between the first side surface of the window sill and the covering body,
A first drainage channel extending in a width direction intersecting the arrangement direction and the up-down direction is formed by the first main body, or by the first main body and the lower frame main body,
A second drainage channel extending in the vertical direction and continuous with the first drainage channel is formed by the second body, or by the second body and the covering body ;
The first body has a first plate-shaped portion whose main surface is aligned in a horizontal direction,
The first drainage channel is formed by a first recess recessed from an upper surface, which is the main surface, of the first plate-shaped portion,
The second body has a first main surface and a second main surface aligned along the vertical direction and the arrangement direction, and has a second plate-shaped portion connected to the first plate-shaped portion at an upper end thereof,
The second drainage channel is formed by a second recess recessed from the first main surface, which is the outdoor main surface of the second plate-shaped portion,
The first body is
a first protrusion located below the first recess and protruding from a lower surface of the first plate-shaped portion,
the second body is located to a side of the second recess and further has a second protrusion protruding from the second main surface of the second plate-shaped portion,
The window sill is
a first fitting recess recessed from an upper surface into which the first protrusion fits;
a second fitting recess recessed from the first side surface into which the second protrusion fits . A window sill portion extending along a horizontal arrangement direction and having a top surface, a first side surface facing the exterior, and a second side surface facing the interior;
a sash frame including a sash bottom frame extending along the arrangement direction and a sash vertical frame extending along the up-down direction, the lower end of which is connected to an end of the sash bottom frame in the arrangement direction;
A waterproof member is sandwiched between the sash frame and the window sill,
The above sash bottom frame is
A lower frame body is located above the window sill and has a rail into which the window fits;
A covering body extending from the lower frame body and covering an upper portion of the first side surface of the window sill portion,
The waterproof member is
A first body sandwiched between an upper surface of the window sill and the lower frame body;
a second body sandwiched between the first side surface of the window sill and the covering body,
A first drainage channel extending in a width direction intersecting the arrangement direction and the up-down direction is formed by the first main body, or by the first main body and the lower frame main body,
A second drainage channel extending in the vertical direction and continuous with the first drainage channel is formed by the second body, or by the second body and the covering body;
The first body has a first plate-shaped portion whose main surface is aligned in a horizontal direction,
The second body has a first main surface and a second main surface aligned along the vertical direction and the arrangement direction, and has a second plate-shaped portion connected to the first plate-shaped portion at an upper end thereof,
The above sash bottom frame is
A first protrusion protruding from the lower surface of the lower frame body, extending along the width direction, and abutting against the upper surface of the first plate-shaped portion to form the first drainage channel together with the first plate-shaped portion;
A window structure having a second ridge protruding from the indoor side of the covering body, extending in the vertical direction, and abutting the first main surface, which is the outdoor main surface of the second plate-shaped portion, to form the second drainage channel together with the second plate-shaped portion. 3. The window structure according to claim 1, wherein the second drainage channel extends below a lower end of the covering body of the sash sill. 4. A window structure according to claim 1 , wherein the first body of the waterproofing member or the lower frame body of the sash lower frame has a shielding portion that separates the first drainage channel from the interior of the room. A window structure as described in any one of claims 1 to 4, further comprising a drainage member attached to the outdoor surface of the wall member located around the sash frame, a portion of which is located between the second main body of the waterproofing member and the covering body of the sash bottom frame and abuts the outdoor surface of the second main body , and has a running water surface through which water discharged from the second drainage channel flows.

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