Drain valve unit, lower frame structure, and method for attaching a drain valve unit to a lower frame

Abstract

To provide, in association with a lower frame with a cutout, a drain valve unit, a structure of the lower frame, and a method of attaching the drain valve unit to the lower frame that are capable of ensuring airtightness.SOLUTION: A drain valve unit 7, which is attached to a cutout 14 formed so as to penetrate a rail support wall 125 for supporting a rail 131 of a lower frame 12 in the indoor / outdoor direction, includes a support member 70 mounted in the cutout 14 and a drain valve 80 that is attached to the support member 70 and drains water from the indoor side to the outdoor side when open.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a drain valve unit, a lower frame structure, and a method for attaching the drain valve unit to the lower frame.

Background Art

[0002] Conventionally, there has been a lower frame of a fitting such as a sliding window sash that is formed in a stepped shape so that the outdoor end is positioned lower than the indoor end. The lower frame of the exterior shutter has a shape in which the lower end of the outdoor member disposed outside the glass extends to a position lower than the lower end of the indoor member disposed inside the glass corresponding to this shape of the lower frame (see Patent Document 1 below).

[0003] In the lower frame, a notch portion penetrating in the indoor-outdoor direction may be formed in the rail support wall portion to which an outer rail for supporting the exterior shutter is attached. In this case, the airtight material provided at the lower end portion of the outdoor member of the shutter abuts below the notch portion of the rail support wall portion, and an airtight line is formed at the height where the airtight material and the rail support wall portion are in contact.

[0004] In recent years, in the lower frame of the shutter, an outdoor member disposed outside the glass and an indoor member disposed inside the glass are formed at the same height, and the lower end portion of the outdoor member and the lower end portion of the indoor member are known to be located at the same height.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] When replacing a conventional exterior shutter with an exterior shutter in which the lower end of the exterior member and the lower end of the interior member are located at the same height, the position of the lower end of the exterior member is higher than that of the conventional exterior shutter. Therefore, there is a problem that the notch formed in the lower frame is exposed in the state where the shutter is closed, and airtightness cannot be ensured.

[0007] The present disclosure has been made in view of the above circumstances, and provides a drain valve unit, a lower frame structure, and a method for attaching the drain valve unit to the lower frame that can ensure airtightness in a lower frame in which a notch is formed.

Means for Solving the Problems

[0008] A drain valve unit according to an aspect of the present disclosure is a drain valve unit attached to a notch formed so as to penetrate in all vertical and indoor-outdoor directions a rail support wall portion that supports a rail of a lower frame and protrudes upward from a middle portion, and includes a support member attached to the notch, and a drain valve attached to the support member and draining indoor water to the outdoor side in an open state. , a mounting hole for arranging the drain valve is formed in the support member, a flange portion protruding to the outer peripheral side is provided at an outdoor-side end of the drain valve, and the flange portion is arranged along the mounting hole. 。

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0010] Hereinafter, as an example of a fitting according to an embodiment, a sliding window will be described with reference to the drawings. In this embodiment, the frame 1 of the existing sliding window 100 shown in FIG. 1 is used as it is (without replacement), and the existing outer shutter 2 and inner shutter 3 are replaced with the newly provided outer shutter 5 and inner shutter 6 as shown in FIG. 3.

[0011] The existing sliding window 100 is provided in the outer wall opening Wa of the outer wall of the building. The existing sliding window 100 includes a frame 1, an outer shutter 2, an inner shutter 3, and a screen door 4.

[0012] In the following description, the direction connecting the outdoor side and the indoor side is referred to as the indoor-outdoor direction. Among the finding directions orthogonal to the indoor-outdoor direction, the direction along the horizontal direction is referred to as the width direction, and the vertical direction is referred to as the up-down direction.

[0013] The frame 1 is formed in a rectangular frame shape. The frame 1 has an upper frame 11, a lower frame 12, and a pair of vertical frames 13. In this embodiment, the frame 1 is made of resin, but it may be composed of a metal profile such as an aluminum alloy or an aluminum resin composite (a configuration in which an aluminum member and a resin member are assembled).

[0014] The upper frame 11 and the lower frame 12 extend in the width direction. The vertical frame 13 extends in the up-down direction. Each vertical frame 13 connects the end of the upper frame 11 and the end of the lower frame 12.

[0015] The lower frame 12 has an upper stage portion 121, a pair of inner rail support portions 122, an inner rail 123, a middle stage portion 124, a pair of outer rail support portions (rail support wall portions) 125, an outer rail 126, a lower stage portion 127, and a screen door rail 128.

[0016] The upper section 121 is arranged on the indoor side of the lower frame 12. The upper section 121 is formed in a plate shape. The plate surface of the upper section 121 faces the vertical direction. A pair of inner rail support parts 122 are provided at the outdoor-side end of the upper section 121. The pair of inner rail support parts 122 are arranged to face each other in the indoor-outdoor direction. The inner rail support part 122 protrudes upward from the upper section 121. The inner rail 123 is fitted between the pair of inner rail support parts 122. The inner rail 123 supports the inner shutter 3 described later.

[0017] The middle section 124 is arranged on the outdoor side of the upper section 121. The middle section 124 is arranged at a height lower than that of the upper section 121. The middle section 124 is formed in a plate shape. The plate surface of the middle section 124 faces the vertical direction. A pair of outer rail support parts 125 are provided at the outdoor-side end of the middle section 124. The pair of outer rail support parts 125 are arranged to face each other in the indoor-outdoor direction. The outer rail support part 125 protrudes upward from the middle section 124. The outer rail 126 is fitted between the pair of outer rail support parts 125. The outer rail 126 supports the outer shutter 2 described later.

[0018] The lower section 127 is arranged on the outdoor side of the middle section 124. The lower section 127 is arranged at a height lower than that of the middle section 124. The screen door rail 128 protrudes upward from the outdoor-side end of the lower section 127.

[0019] The outer rail 126 that supports the outer shutter 2 is arranged at a height lower than that of the inner rail 123 that supports the inner shutter 3. Thus, the lower frame 12 is formed in a stepped shape.

[0020] As shown in FIG. 2, notches 14 that penetrate the pair of outer rail support parts 125 and the outer rail 126 in the indoor-outdoor direction are formed at the widthwise ends of the lower frame 12. In FIG. 2, the right end of the lower frame 12 is shown as viewed from the outdoor side, but notches 14 are also formed at the left end of the lower frame 12 in the same manner as viewed from the outdoor side.

[0021] The length of the notch in the outer rail 126 is longer than the length of the notch in the width direction of the pair of outer rail support portions 125. The surface 125a at the widthwise end of the outer rail support portion 125, the upper surface 125u at the widthwise end of the outer rail support portion 125, and the surface 126a at the widthwise end of the outer rail 126 are exposed. A protective member 141 is provided so as to cover the surface 125a of the outer rail support portion 125, the upper surface 125u of the outer rail support portion 125, and the 126a of the outer rail 126. The length of the protective member 141 in the width direction is shorter than the length of the notch portion 14. The portion on the widthwise end side of the draw-in window 100 with respect to the protective member 141 is a drainage channel 142 that drains water such as condensed water on the indoor side to the outdoor side from the pair of outer rail support portions 125.

[0022] As shown in FIG. 1, the outer shutter 2 is disposed on the outdoor side of the inner shutter 3. The outer shutter 2 and the inner shutter 3 are provided slidably in the width direction on the frame body 1. When the outer shutter 2 and the inner shutter 3 are closed, the outer shutter 2 and the inner shutter 3 close the inside of the frame body 1.

[0023] The outer shutter 2 has a frame body 20 and a glass 29. The frame body 20 is formed in a rectangular frame shape. The frame body 20 has an upper frame 21, a lower frame 22, and a pair of vertical frames 23. In the present embodiment, the frame body 20 is made of resin, but it may be composed of a metal profile such as an aluminum alloy or an aluminum resin composite. The upper frame 21 and the lower frame 22 extend in the width direction. The vertical frame 23 extends in the vertical direction. Each vertical frame 23 connects the end of the upper frame 21 and the end of the lower frame 22.

[0024] The lower frame 22 has an outdoor frame portion 221, an indoor frame portion 222, and a connecting frame portion 223. The outdoor frame portion 221 is disposed on the outdoor side of the glass 29. The indoor frame portion 222 is disposed on the indoor side of the glass 29. A hollow portion is formed inside the outdoor frame portion 221 and the indoor frame portion 222. The outdoor frame portion 221 and the indoor frame portion 222 are disposed over substantially the entire length of the outer shutter 2 in the width direction.

[0025] In the existing frame structure, the vertical length of the outdoor frame portion 221 is longer than the vertical length of the indoor frame portion 222. The upper end portions of the outdoor frame portion 221 and the indoor frame portion 222 are located at substantially the same height. The lower end portion 221d of the outdoor frame portion 221 is located below the lower end portion 222d of the indoor frame portion 222.

[0026] An outer airtight material 226 is provided on the surface of the outdoor frame portion 221 facing the indoor side. The outer airtight material 226 is in contact with the outer rail support portion 125 on the outdoor side. An inner airtight material 227 is provided on the surface of the indoor frame portion 222 facing the outdoor side. The inner airtight material 227 is in contact with the outer rail support portion 125 on the indoor side. An airtight line A1 is formed along the horizontal direction so as to pass through the lower end portion 221d of the outdoor frame portion 221 of the lower frame 22 of the outer shutter 2.

[0027] The connecting frame portion 223 connects the middle in the vertical direction of the outdoor frame portion 221 and the middle in the vertical direction of the indoor frame portion 222. A door wheel hole (not shown) penetrating in the vertical direction is formed in the connecting frame portion 223. A door wheel 224 is provided in the door wheel hole. The door wheel 224 is capable of running on the outer rail 126 of the lower frame 12.

[0028] The glass 29 is housed inside the frame body 20. In the present embodiment, the glass 29 is double-pane glass, but it may be single-pane glass or the like.

[0029] The inner shutter 3 has a frame body 30 and a glass 39. The frame body 30 is formed in a square frame shape. The frame body 30 has an upper frame 31, a lower frame 32, and a pair of vertical frames 33. In the present embodiment, the frame body 30 is made of resin, but it may be composed of a metal profile such as an aluminum alloy or an aluminum resin composite. The upper frame 31 and the lower frame 32 extend in the width direction. The vertical frames 33 extend in the vertical direction. Each vertical frame 33 connects the end portion of the upper frame 31 and the end portion of the lower frame 32. A door wheel 324 is provided on the lower frame 32. The door wheel 324 is capable of running on the inner rail 123 of the lower frame 12. The glass 39 is housed inside the frame body 30. In the present embodiment, the glass 39 is double-pane glass, but it may be single-pane glass or the like.

[0030] The screen door 4 is arranged on the outdoor side of the outer shutter 2. The screen door 4 is capable of running on the screen door rail 128 of the lower frame 12.

[0031] As shown in FIG. 3, the newly installed sliding window 200 uses the frame 1 of the existing sliding window 100 as it is, and replaces the existing outer shutter 2 and inner shutter 3 with the newly installed outer shutter 5 and inner shutter 6. The newly installed outer shutter 5 after replacement is referred to as the new outer shutter 5, and the newly installed inner shutter 6 after replacement is referred to as the new inner shutter 6. Among the components of the newly installed sliding window 200, those identical to the components of the existing sliding window 100 are given the same reference numerals, and the description of those components is omitted.

[0032] The newly installed sliding window 200 includes a frame 1, a new outer shutter 5, a new inner shutter 6, and a screen door 4.

[0033] The new outer shutter 5 has a frame body 50 and glass 59. The frame body 50 is formed in a square frame shape. The frame body 50 has an upper frame 51, a lower frame 52, and a pair of vertical frames 53. In this embodiment, the frame body 50 is made of resin, but it may be composed of a metal profile such as an aluminum alloy or an aluminum resin composite. The upper frame 51 and the lower frame 52 extend in the width direction. The vertical frame 53 extends in the vertical direction. Each vertical frame 53 connects the end of the upper frame 51 and the end of the lower frame 52.

[0034] The glass 59 is housed inside the frame body 50. In this embodiment, the glass 59 is triple glass with better heat insulation than the glass 29 of the existing sliding window 100, but it may be single-pane glass, double-pane glass, etc.

[0035] The new inner shutter 6 has the same configuration as the new outer shutter 5 except that the vertical lengths of the new outer shutter 5 and the glass 59 are different, and the same reference numerals are given and the description is omitted. The lower frame 52 of the new inner shutter 6 and the lower frame 52 of the new outer shutter 5 have the same length and the same cross-sectional shape.

[0036] The vertical length of the upper frame 51 of the new exterior shutter 5 is shorter than the vertical length of the upper frame 21 of the exterior shutter 2 of the existing sliding window 100. The vertical length of the lower frame 52 of the new exterior shutter 5 is shorter than the vertical length of the lower frame 22 of the existing exterior shutter 2. The widthwise length of the vertical frame 53 of the new exterior shutter 5 is shorter than the widthwise length of the vertical frame 23 of the existing exterior shutter 2. As a result, the vertical and widthwise lengths of the glass 59 of the new exterior shutter 5 become longer than the vertical and widthwise lengths of the glass 29 of the existing exterior shutter 2. The new exterior shutter 5 can enhance the daylighting property and heat insulation property more than the existing one.

[0037] The lower frame 52 of the new exterior shutter 5 and the new interior shutter 6 has a first outer plate portion 521, a second outer plate portion 522, a first inner plate portion 523, a second inner plate portion 524, and a connecting plate portion 525.

[0038] The first outer plate portion 521 is disposed on the outdoor side of the glass 59. The second outer plate portion 522 is disposed on the indoor side of the first outer plate portion 521. The first outer plate portion 521 and the second outer plate portion 522 are disposed to face each other in the indoor-outdoor direction. A hollow portion is formed between the first outer plate portion 521 and the second outer plate portion 522. The lower end portions of the first outer plate portion 521 and the second outer plate portion 522 are located at the same height. The first outer plate portion 521 and the second outer plate portion 522 are formed in a plate shape. The plate surfaces of the first outer plate portion 521 and the second outer plate portion 522 face the indoor-outdoor direction. The first outer plate portion 521 and the second outer plate portion 522 are disposed over substantially the entire widthwise length of the new exterior shutter 5.

[0039] The first inner plate portion 523 is disposed on the indoor side of the glass 59. The second inner plate portion 524 is disposed on the outdoor side of the first inner plate portion 523. The first inner plate portion 523 and the second inner plate portion 524 are disposed opposite to each other in the indoor-outdoor direction. A hollow portion is formed between the first inner plate portion 523 and the second inner plate portion 524. The lower end portions of the first inner plate portion 523 and the second inner plate portion 524 are located at the same height. The first inner plate portion 523 and the second inner plate portion 524 are formed in a plate shape. The plate surfaces of the first inner plate portion 523 and the second inner plate portion 524 face the indoor-outdoor direction. The first inner plate portion 523 and the second inner plate portion 524 are disposed over substantially the entire length in the width direction of the new outer shutter 5.

[0040] The connecting plate portion 525 connects the middle in the vertical direction of the second outer plate portion 522 and the middle in the vertical direction of the second inner plate portion 524. A pulley hole (not shown) penetrating in the vertical direction is formed in the connecting plate portion 525. A pulley 526 is provided in the pulley hole.

[0041] An outer airtight material 542 is fitted between the lower end portions of the first outer plate portion 521 and the second outer plate portion 522. An inner airtight material 541 is fitted between the lower end portions of the first inner plate portion 523 and the second inner plate portion 524. The outer airtight material 542 and the inner airtight material 541 are disposed over substantially the entire length of the lower frame 52.

[0042] The end portion of the outer airtight material 542 of the new outer shutter 5 abuts against the outdoor outer rail support portion 125. The end portion of the inner airtight material 541 of the new outer shutter 5 abuts against the indoor outer rail support portion 125. The end portion of the outer airtight material 542 of the new inner shutter 6 abuts against the outdoor inner rail support portion 122. The end portion of the inner airtight material 541 of the new inner shutter 6 abuts against the indoor inner rail support portion 122. The inner airtight material 541 and the outer airtight material 542 have the same shape and are symmetrically disposed in the indoor-outdoor direction.

[0043] In the new outer shutter 5, an airtight line A2 is formed along the horizontal direction so as to pass through the inner airtight material 541 and the outer airtight material 542. The airtight line A2 is formed at a position higher than the airtight line A1 of the existing outer shutter 2.

[0044] Between a pair of outer rail support portions 125, an outer rail 131 is fitted. Between a pair of inner rail support portions 122, an inner rail 132 is fitted. The outer rail 131 and the inner rail 132 have the same cross-sectional shape.

[0045] The lower frame structure 12A will be described. As shown in FIG. 4, a drain valve unit 7 is provided in the notch portion 14 of the lower frame 12. The drain valve unit 7 includes a support member 70 and a drain valve 80. A space formed on the end side in the width direction rather than the support member 70 is where the vertical frame 13 is arranged.

[0046] As shown in FIG. 5, the support member 70 has a pair of locking wall portions 71, an installation wall portion 72, a rail portion 73, an outdoor side extension wall 74, and an indoor side extension wall portion 75.

[0047] The pair of locking wall portions 71 are arranged to face each other in the indoor-outdoor direction. The pair of locking wall portions 71 are arranged between a pair of outer rail support portions 125 of the lower frame 12. As shown in FIG. 6, at the lower end portion of the locking wall portion 71, a protrusion 71a protruding toward the side opposite to the opposing locking wall portion 71 is formed. On the surface 125a of the outer rail support portion 125 facing the opposing outer rail support portion 125 side, a protrusion 125b protruding toward the opposing outer rail support portion 125 side is formed. The protrusion 71a of the locking wall portion 71 is in contact with the surface 125a of the outer rail support portion 125 at a position below the protrusion 125b. Thereby, the support member 70 is suppressed from moving upward from between a pair of outer rail support portions 125 of the lower frame 12.

[0048] The installation wall portion 72 connects the pair of locking wall portions 71. The indoor / outdoor direction ends of the installation wall portion 72 protrude in the indoor / outdoor direction more than the pair of locking wall portions 71. As shown in FIG. 5, the length of the installation wall portion 72 (the length in the width direction of the sliding window 200) is longer than the length of the pair of locking wall portions 71 (the length in the width direction of the sliding window 200). The installation wall portion 72 extends toward the end side in the width direction of the sliding window 200 more than the locking wall portion 71. The portion of the installation wall portion 72 located directly above the locking wall portion 71 is installed on the upper surface 125u of the outer rail support portion 125 of the lower frame 12.

[0049] The rail portion 73 protrudes upward from the installation wall portion 72. The door wheel 526 (see FIG. 3) of the new exterior shutter 5 is enabled to travel on the rail portion 73.

[0050] The outdoor side extension wall 74 extends downward from the outdoor side end of the installation wall portion 72. The outdoor side extension wall 74 is arranged on a line extending the outdoor side outer rail support portion 125 of the lower frame 12 in the width direction of the sliding window 200. An attachment hole 74h penetrating in the indoor / outdoor direction is formed in the outdoor side extension wall 74. The lower end portion (not shown) of the outdoor side extension wall 74 abuts against the middle portion 124 of the lower frame 12.

[0051] The indoor side extension wall portion 75 extends downward from the indoor side end of the installation wall portion 72. The indoor side extension wall portion 75 is arranged on a line extending the indoor side outer rail support portion 125 of the lower frame 12 in the width direction of the sliding window 200. As shown in FIG. 6, the lower end portion 75d of the indoor side extension wall portion 75 is arranged with a gap s1 above the middle portion 124 of the lower frame 12. Water such as condensed water is enabled to flow through this gap s1.

[0052] As shown in FIG. 7, a slit 75h penetrating in the indoor / outdoor direction is formed in the indoor side extension wall portion 75. A plurality of slits 75h are formed at intervals in the width direction of the sliding window 200. When the gap s1 below the lower end portion 75d of the indoor side extension wall portion 75 is clogged with dust or the like, water such as condensed water flows through the slit 75h.

[0053] As shown in Fig. 5, the drain valve 80 has a housing portion 81 and a valve body 82 (see Fig. 6). As shown in Fig. 7, the upper portion 81u of the housing portion 81 is in contact with the lower surface of the installation wall portion 72 of the support member 70. The lower portion 81d of the housing portion 81 is in contact with the upper surface of the middle portion 124 of the lower frame 12. An opening 81h that opens in the indoor-outdoor direction is formed in the housing portion 81. A flange portion 81a that projects to the outer peripheral side is provided at the outdoor-side end of the housing portion 81. The flange portion 81a is arranged along the mounting hole 74h (see Fig. 5) of the support member 70.

[0054] As shown in Fig. 6, an outer airtight material 542 (see Fig. 3) is in contact with a portion of the flange portion 81a of the housing portion 81 that is disposed above the mounting hole 74h. An airtight line A2 is formed along this height.

[0055] As shown in Fig. 7, the valve body 82 has a rotation shaft portion 82a and a valve main body 82b. The rotation shaft portion 82a extends in the width direction of the sliding window 200. The rotation shaft portion 82a is rotatably supported by the housing portion 81. The valve main body 82b is provided on the rotation shaft portion 82a.

[0056] In a state where the valve main body 82b closes the opening 81h of the housing portion 81, the lower end portion of the valve main body 82b is in contact with the outdoor-side lower edge of the opening 81h in the housing portion 81. Thereby, even when a force acting from the outdoor side to the indoor side such as wind pressure acts, the valve main body 82b can maintain a state of closing the opening 81h of the housing portion 81.

[0057] When water such as condensed water passes through the gap s1 below the lower end portion 75d of the indoor-side extension wall portion 75 of the support member 70 and the slit 75h of the indoor-side extension wall portion 75 and presses the valve main body 82b to the outdoor side, the rotation shaft portion 82a rotates and the lower end portion of the valve main body 82b faces upward and to the outdoor side. Thereby, the opening 81h of the housing portion 81 is opened and water is drained from the opening 81h.

[0058] On the upper part of the housing portion 81, a protrusion (engaging portion) 81c protruding upward is formed. On the lower surface of the installation wall portion 72 of the support member 70, a recess (locking portion) 72a recessed upward is formed. The protrusion 81c of the drain valve 80 is locked to the recess 72a of the support member 70.

[0059] A method of attaching the above drain valve unit 7 to the notch portion 14 of the lower frame 12 will be described. The drain valve 80 is inserted into the mounting hole 74h of the support member 70 from the outdoor side extension wall 74 side to the indoor side extension wall portion 75 side. The housing portion 81 is elastically deformed in the vertical direction, and the protrusion 81c of the housing portion 81 moves to the indoor side extension wall portion 75 side while contacting the lower surface of the installation wall portion 72 of the support member 70. The protrusion 81c of the housing portion 81 is locked to the recess 72a of the support member 70, the drain valve 80 is attached to the support member 70, and the drain valve unit 7 is assembled. The pair of locking wall portions 71 of the support member 70 of the drain valve unit 7 are inserted from above between the pair of outer rail support portions 125 of the lower frame 12. The protrusion 71a of the locking wall portion 71 is moved downward over the protrusion 125b of the outer rail support portion 125 to attach the support member 70 to the lower frame 12. Thereby, the drain valve unit 7 is attached to the notch portion 14 of the lower frame 12.

[0060] In the newly installed sliding window 200 configured as described above, a drain valve unit 7 having a drain valve 80 is attached to the notch portion 14 formed in the outer rail support portion 125 of the lower frame 12. Thereby, the indoor and outdoor spaces sandwiching the notch portion 14 do not communicate with each other when the valve body 82 of the drain valve 80 is closed, and airtightness can be ensured.

[0061] The outer airtight material 542 provided on the new outer shutter 5 abuts on a portion of the flange portion 81a of the housing portion 81 that is disposed above the mounting hole 74h. An airtight line A2 is formed along this height.

[0062] In the newly installed sliding window 200, the protrusion 81c of the drain valve 80 is locked to the recess 72a of the support member 70, and the drain valve 80 is attached to the support member 70. Therefore, the drain valve 80 can be easily attached to the support member 70.

[0063] In the newly installed sliding window 200, when replacing the existing outer shutter 2 in the existing stepped lower frame 12, an airtight line A2 can be formed at a position higher than the existing airtight line A1 by attaching a drain valve unit 7 to the lower frame 12.

[0064] The various shapes, combinations, etc. of the respective constituent members shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present disclosure.

[0065] For example, in the embodiment, a sliding window is described as an example of a fitting, but the present disclosure is not limited thereto. If a notch is formed in a casement window, a sliding window, etc., a drain valve unit may be attached to the notch. Alternatively, if a notch is formed in the inner shutter of a sliding window, a drain valve unit may be attached to the notch.

[0066] In the embodiment, the protrusion 81c of the drain valve 80 is locked to the recess 72a formed in the lower surface of the installation wall portion 72 of the support member 70, but the present disclosure is not limited thereto. The recess 72a may not be formed in the lower surface of the installation wall portion 72 of the support member 70, and the protrusion 81c of the drain valve 80 may abut against the lower surface of the flat installation wall portion 72 and be locked by stretching in the vertical direction. Alternatively, the housing portion 81 of the drain valve 80 may be adhered to the support member 70.

Explanation of Reference Numerals

[0067] 1... Frame body, 2... Existing outer shutter, 3... Existing inner shutter, 4... Screen door, 5... Newly installed outer shutter, 6... Newly installed inner shutter, 7... Drain valve unit, 14... Notch, 22... Lower frame of existing outer shutter, 29... Glass of existing outer shutter, 52... Lower frame of newly installed outer shutter, 59... Glass of newly installed outer shutter, 70... Support member, 72a... Recess (locking portion), 80... Drain valve, 81c... Protrusion (locked portion), 131... Outer rail, 125... Rail support wall portion, 132... Inner rail

Claims

1. A drain valve unit attached to a notch formed so as to penetrate in all vertical and indoor / outdoor directions a rail support wall portion that supports a rail of a lower frame and protrudes upward from a middle portion, comprising: a support member attached to the notch; a drain valve attached to the support member and draining indoor water to the outdoor side in an open state; and an attachment hole for arranging the drain valve is formed in the support member; a flange portion protruding to the outer peripheral side is provided at an outdoor end of the drain valve; the drain valve unit in which the flange portion is arranged along the attachment hole.

2. The drain valve unit according to claim 1, wherein a locked portion formed in the drain valve is locked to a locking portion formed in the support member.

3. A lower frame in which an outer rail supporting an outer shutter is arranged at a height lower than an inner rail supporting an inner shutter, and the lower frame structure comprising the drain valve unit according to claim 1 or 2 attached to a notch formed so as to penetrate in all vertical and indoor / outdoor directions a rail support wall portion that supports the outer rail and protrudes upward from a middle portion.

4. A method for attaching the drain valve unit according to claim 1 or 2 to a lower frame, the method comprising attaching the drain valve to the support member and attaching the support member to the notch. A method for attaching the drain valve unit to the lower frame, the method comprising attaching the drain valve to the support member and attaching the support member to the notch.

Images