JP2019120022A - Double sash - Google Patents

Abstract

To provide a double sash that can prevent a sliding door of an inner window from slipping out when pressure is generated.SOLUTION: A ventilation mechanism 60 has a first ventilation part 64 that allows air to circulate in the indoor and outdoor directions when pressure from the indoor side to the outdoor side is generated, and a second ventilation part 66 that allows air to circulate in the indoor and outdoor directions when pressure from the outdoor side to the indoor side is generated. The first ventilation part 64 and the second ventilation part 66 are arranged at different positions in at least any one of the longitudinal direction and the vertical direction.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a double sash.

  Conventionally, a double sash in which an outer window and an inner window are provided at an opening of a building is known to improve soundproofness and heat insulation (see, for example, Patent Document 1). Moreover, in cold regions such as Hokkaido, a resin sash may be employed for the inner window in order to further improve the heat insulation.

  In the case where the outer window and the inner window are reverse sash, air tightness is ensured against positive pressure (pressure from the outdoor side to the indoor side). When a positive pressure is generated, a pressure of about 10% of the pressure acting on the outer window acts on the inner window, and a negative pressure (a pressure from the indoor side to the outdoor side) occurs on the inner window. It has been confirmed that a pressure of about 80% of the pressure acting on the outer window acts.

Japanese Utility Model Publication No. 60-28768

  It is a building with a large wind pressure acting on shoji like middle-high-rise buildings, the inner window can not withstand the pressure, the shoji in the inner window may come out of the frame, or the detached shoji may fall and the glass may be damaged. is there.

  Then, this invention is made in view of the said situation, and when pressure arises, the double sash which can suppress that the shoji of an inner window remove | deviates is provided.

In order to achieve the above object, the present invention adopts the following means.
That is, the double sash according to the present invention is a double sash installed at an opening of a building and provided with an outer window and an inner window disposed on the indoor side of the outer window, wherein the inner window is A frame provided with an edge of the opening and a gap, a ventilation mechanism provided in the gap formed between the edge of the opening and the frame, provided in the frame A first ventilation unit that allows air to flow in and out of the room when pressure from the indoor side to the outdoor side is generated, and the outdoor side to the indoor side And a second ventilation unit that enables air to flow in and out of the room when pressure is generated in the vehicle, and the first ventilation unit and the second ventilation unit move in the left-right direction and the up-down direction. Are arranged at different positions in at least one direction.

In the double sash configured as described above, when negative pressure is generated in the closed state where the outer window and the inner window are closed, air flows in the first ventilation unit from the indoor side to the outdoor side in the inner window . In addition, when a positive pressure is generated in the closed state in which the outer window and the inner window are closed, air flows from the outdoor side to the indoor side in the second ventilation unit in the inner window. Therefore, when a negative pressure and a positive pressure are generated, a flow path of air communicated from the indoor side to the outdoor side of the inner window is formed, so the pressure difference between the indoor side and the outdoor side of the inner window (Pressure) can be reduced, and it is suppressed that the shoji of an inner window remove | deviates from a frame.
Further, the first ventilation unit and the second ventilation unit are disposed at different positions in at least one of the left and right direction and the up and down direction. Therefore, the ventilation volume of the first ventilation unit and the second ventilation unit can be adjusted by adjusting the opening area of the first ventilation unit and the opening area of the second ventilation unit, respectively.

  Further, in the double sash according to the present invention, it is preferable that a total opening area of the first ventilation unit is configured to be larger than a total opening area of the second ventilation unit.

  In the double sash configured as described above, the total opening area of the first ventilation section is larger than the total opening area of the second ventilation section. Therefore, when a negative pressure is generated, a flow path of air communicated from the indoor side to the outdoor side of the inner window can be formed with certainty, so the pressure difference between the indoor side and the outdoor side of the inner window Pressure) can be reliably reduced.

  Further, in the double sash according to the present invention, the ventilation mechanism includes the gap between the upper edge of the opening and the upper frame of the frame, or the lower edge of the opening and the frame The second ventilating part is provided in the gap between the lower frame and the second frame, and the second ventilating part is provided at each end of the gap in the left-right direction, and the first ventilating part is provided at the both ends in the left-right direction It may be provided between the two ventilation units.

  In the double sash configured in this way, in the gap between the upper edge of the opening and the upper frame of the frame or in the gap between the lower edge of the opening and the lower frame of the frame, At both ends of the air, air can flow from the indoor side to the outdoor side under negative pressure by the first ventilation unit. In the gap, in the middle part in the left-right direction, air can be circulated from the outdoor side to the indoor side at the time of positive pressure by the second ventilation unit.

  Further, in the double sash according to the present invention, the ventilation mechanism is provided in the gap between the upper edge of the opening and the upper frame, and the ventilation mechanism is provided between the upper edge of the opening and the upper frame. There may be a bridge disposed between the two, and the partition may separate the first ventilation unit and the second ventilation unit.

  In the double sash configured as described above, in the gap in which the first ventilation unit and the second ventilation unit are disposed, a cross section that divides the first ventilation unit and the second ventilation unit is disposed. Therefore, since the air flowing through the first ventilation unit and the air flowing through the second ventilation unit are shut off by turning, it is suppressed that the flow of air is blocked.

  Further, in the double sash according to the present invention, the ventilation mechanism is provided with a cover body on the indoor side of the first ventilation unit or the second ventilation unit of the ventilation mechanism, and the cover body is And an upper cover portion extending downward from the upper edge side of the opening, and a lower cover portion extending upward from the upper frame side, the lower cover portion being formed of the upper cover portion Also, it may be disposed indoors.

In the double sash configured as described above, when the ventilation mechanism is looked up from the indoor side, the lower part of the ventilation mechanism is hidden by the lower cover portion of the cover body provided on the indoor side of the ventilation mechanism and is difficult to visually recognize The upper part of the cover is hidden by the upper cover portion of the cover body provided on the indoor side of the ventilation mechanism so that it is difficult to visually recognize, and the appearance can be improved.
In addition, since the upper cover portion and the lower cover portion are disposed apart from each other in the indoor / outdoor direction, it is also possible to secure an air flow path.

  Further, in the double sash according to the present invention, the upper cover portion and the lower cover portion may be provided on the indoor side of the cross section.

  In the double sash configured as described above, the upper cover portion and the lower cover portion are provided on the indoor side of the gate, so that the exposure of the portion on the indoor side of the gate in the ventilation mechanism is reliably suppressed. can do.

  Further, in the double sash according to the present invention, the ventilation mechanism is provided in the gap between the lower edge portion of the opening and the lower frame of the frame, and the first ventilation portion of the ventilation mechanism or The cover body is provided on the indoor side of the second ventilation unit, and the cover body is a lower cover portion extending upward from the lower edge side of the opening, and a lower side from the lower frame side. An upper cover portion extending toward the lower cover portion, and the upper cover portion may be disposed indoors more than the lower cover portion.

In the double sash configured as described above, when looking down on the ventilation mechanism from the indoor side, the lower portion of the ventilation mechanism is difficult to see hidden by the lower cover portion of the cover body provided on the indoor side of the ventilation mechanism, and the ventilation mechanism The upper part of the cover is hidden by the upper cover portion of the cover body provided on the indoor side of the ventilation mechanism so that it is difficult to visually recognize, and the appearance can be improved.
In addition, since the upper cover portion and the lower cover portion are disposed apart from each other in the indoor / outdoor direction, it is also possible to secure an air flow path.

  Further, in the double sash according to the present invention, the ventilation mechanism is provided in the gap between the left and right edge portions of the opening and the vertical frame of the frame, and the second ventilation unit is The first ventilation unit may be provided at each end in the vertical direction, and the first ventilation unit may be provided between the second ventilation units provided at both ends in the vertical direction.

  In the double sash configured as described above, the first ventilation unit at the both ends in the vertical direction in the gap between the left and right edges of the opening and the vertical frame of the frame causes air to be indoors at the time of negative pressure. Can be distributed to the outdoor side. Further, in the clearance, in the middle portion in the vertical direction, air can be circulated from the outdoor side to the indoor side at the time of positive pressure by the second ventilation unit.

  In the double sash according to the present invention, the first ventilating unit and the second ventilating unit each have a valve unit that can rotate with the left and right direction as an axial direction, and the valve unit in the first ventilating unit Is rotatably provided from a posture along the vertical surface to a posture inclined to the outdoor side, and the valve portion in the second ventilation unit is rotatable from a posture along the vertical surface to a posture inclined to the indoor side It may be provided.

  In the double sash configured as described above, the same valve unit is used in the first ventilation unit and the second ventilation unit, and the indoor and outdoor directions are changed. Therefore, parts can be made common in the first ventilation unit and the second ventilation unit.

  In the double sash according to the present invention, the ventilation mechanism has an upper member disposed along the upper edge of the opening and a lower member disposed along the upper frame. The vertical arrangement is disposed between the upper member and the lower member, and the first ventilation unit and the second ventilation unit protrude laterally from a surface along the indoor / outdoor direction of the horizontal arrangement. One surface and a second surface projecting upward from the lower member may be respectively provided, and the valve portion may have a surface abutting on the first surface and the second surface.

  In the double sash configured as described above, the abutment surface of the valve portion abuts on a first surface extending in the left-right direction from the side and a second surface extending upward from the lower member. Therefore, in the first ventilating unit and the second ventilating unit, it is possible to maintain a state in which the flow of air in the indoor and outdoor directions is reliably blocked.

  ADVANTAGE OF THE INVENTION According to the double sash which concerns on this invention, when pressure arises, it can suppress that the shoji of an inner window remove | deviates.

It is the front view which looked at the double sash which concerns on one Embodiment of this invention from indoor side. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is the C section enlarged view of FIG. It is the D section enlarged view of FIG. It is a figure which shows the structure of the 2nd ventilation part of the double sash which concerns on one Embodiment of this invention, and is equivalent to the upper part of FIG. It is a disassembled perspective view which shows the structure of the ventilation mechanism of the double sash which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the structure of the lower part of the ventilation mechanism of the double sash which concerns on one Embodiment of this invention. It is the EE sectional view taken on the line of FIG. 5, and has shown the structure of the ventilation mechanism. It is F arrow directional view of FIG. It is a figure which shows the valve part of the ventilation mechanism of the double sash which concerns on one Embodiment of this invention, It is the figure seen from the left side (or right side), (b) It sees from indoor side (or outdoor side) FIG. It is a figure which shows a behavior when negative pressure arises in the outer window of the double sash which concerns on one Embodiment of this invention. It is a perspective view which shows a part of ventilation mechanism of the double sash which concerns on the modification 1 of one Embodiment of this invention. It is a perspective view which shows a part of ventilation mechanism of the double sash which concerns on the modification 2 of one Embodiment of this invention.

Hereinafter, a double sash according to an embodiment of the present invention will be described based on FIGS. 1 to 12.
FIG. 1 is a front view of a double sash according to an embodiment of the present invention as viewed from the indoor side. FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a cross-sectional view taken along line B-B of FIG.
As shown in FIGS. 1 to 3, the double sash 100 is provided at the opening P of the wall portion W of the building, and is provided with an outer window 1 disposed on the outdoor side and an inner window 4 disposed on the indoor side. And have.
In the following description, the direction connecting the outdoor side and the indoor side is referred to as the indoor / outdoor direction. Further, of the directions orthogonal to the indoor / outdoor direction, the direction along the horizontal direction is referred to as the left-right direction. Also, when viewed from the indoor side, the left side and the right side are respectively referred to as the left side and the right side.

  As shown in FIGS. 2 and 3, the outer window 1 is a frame 10 provided in the opening P and formed in a rectangular frame shape, and an outer shell provided slidably in the lateral direction with respect to the frame 10. 20A, a cat glide 20B, and a screen door 30. The outer window 1 is a so-called pulling sash.

  The frame 10 includes an upper frame 11 and a lower frame 12 extending in the left and right direction, and a vertical frame 13 connecting the both ends of the upper frame 11 and the both ends of the lower frame 12 and extending in the vertical direction. Have. In the present embodiment, the frame 10 is formed of an aluminum extrusion molding member.

  The outer gutter 20A is provided on the outdoor side of the frame 10, and the inner gutter 20B is provided on the indoor side of the frame 10. In a state in which the outer case 20A and the inner case 20B are closed, the outer case 20A and the inner case 20B are arranged to occlude the inside of the frame 10. The outer case 20 </ b> A and the inner case 20 </ b> B each have a casing 21 formed in a quadrilateral frame shape and a glass 29 housed in the casing 21.

  Each housing 21 connects the upper ridge 22 and the lower ridge 23 extending in the left-right direction, the both end portions of the upper ridge 22 and the both ends of the lower ridge 23, and extends in the vertical direction There is a combination bowl 25. In the present embodiment, the casing 21 is made of an aluminum extrusion-formed member.

  A glass holding groove 27 concaved outward is formed on each end surface (inner peripheral surface) of each weir 22, 23, 24, 25 facing the glass 29 side. The peripheral portion of the glass 29 is fitted in the glass holding groove 27.

  The sliding movement is locked by locking the crescent lock (not shown) provided on each other's combination rod 25 with the outer shingles 20A and the inner shingles 20B, and the sliding movement becomes possible by releasing the crescent lock. Is configured as.

  The screen door 30 has a screen door frame 31 formed in a square frame shape and a screen door main body 39 provided in the screen door frame 31. The screen door 31 connects the screen door 32 and the screen door 33 extending in the left and right direction, and connects the both ends of the screen door 32 and both ends of the screen door 33 to extend in the vertical direction. And a vertical weir 34.

  As shown in FIG. 1, the inner window 4 has a ventilation unit 6 provided along the upper edge of the opening P, a frame 40 formed in a rectangular frame shape, and a lateral direction with respect to the frame 40 And an outer-shutter 50A and an inner-shutter 50B. The inner window 4 is a so-called pulling sash.

  As shown in FIGS. 2 and 3, the frame 40 connects the upper frame 41 and the lower frame 42 extending in the left-right direction, both ends of the upper frame 41 and both ends of the lower frame 42, and thereby moves up and down. And a vertical frame 43 extending in In the present embodiment, the frame body 40 is formed of a synthetic resin extruded member.

  The outer gutter 50A is provided on the outdoor side of the frame 40, and the inner gutter 50B is provided on the indoor side of the frame 40. In a state in which the outer case 50A and the inner case 50B are closed, the outer case 50A and the inner case 50B are arranged to occlude the inside of the frame 40. Each of the outer-shutter 50A and the inner-shutter 50B includes a casing 51 formed in a quadrangular frame shape and a glass 59 housed in the casing 51.

  The respective housings 51 connect the upper ridge 52 and the lower ridge 53 extending in the left and right direction, the both ends of the upper ridge 52 and the both ends of the lower ridge 53, and extend in the vertical direction There is a combination group 55. In the present embodiment, the casing 51 is made of a synthetic resin extruded member.

  As shown in FIGS. 2 and 3, in each end face (inner peripheral surface) of each weir 52, 53, 54, 55 facing the glass 59, a glass holding groove 57 concaved outward is formed. . The peripheral portion of the glass 59 is fitted in the glass holding groove 57.

  Slide movement is locked by locking crescent lock 550 (refer to FIG. 1. The same shall apply hereinafter) provided on each other's union 55 for the shoji 50A and the inner shoji 50B, and release the crescent lock 550. The slide movement is configured to be made possible.

Next, the configuration of each part will be described in detail.
First, the upper frame 11 of the outer window 1 will be described.
FIG. 4 is an enlarged view of a portion C of FIG.
As shown in FIG. 4, the upper frame 11 includes an upper frame plate portion 111, a screen door projecting frame wall portion 112 extending downward from the upper frame plate portion 111, an outdoor side projecting frame wall portion 113, and an indoor side projecting frame wall portion 114. And a downward frame wall portion 115. The screen door projecting frame wall portion 112, the outdoor side projecting frame wall portion 113, the indoor side projecting frame wall portion 114, and the downward frame wall portion 115 are disposed in this order from the outdoor side to the indoor side.

  The upper frame plate portion 111 is formed in a flat plate shape, and is disposed with the plate thickness direction directed in the vertical direction. The upper frame plate portion 111 is fixed to the frame Q of the building with a screw or the like.

  The screen door protruding frame wall portion 112, the outdoor side protruding frame wall portion 113, the indoor side protruding frame wall portion 114, and the downward frame wall portion 115 are formed in a flat plate shape, and are disposed with the thickness direction facing the indoor outside direction. .

  At the lower end portion of the downward frame wall portion 115, a mounting wall portion 116 extending toward the indoor side is provided. The mounting wall portion 116 is formed in a flat plate shape, and is disposed with the plate thickness direction directed in the vertical direction. The mounting wall portion 116 is fixed to the lower surface of the upper frame R provided at the upper end of the opening P with a screw or the like.

Next, the upper eyelid 22 of the outer seal 20A of the outer window 1 will be described.
The upper rod 22 connects the upper outer plate portion 221 disposed on the outdoor side, the upper inner plate portion 222 disposed on the indoor side, the upper outer plate portion 221, and the upper inner plate portion 222. And H.223.

  The upper outer plate portion 221 and the upper inner plate portion 222 are formed in a flat plate shape, and are disposed with the plate thickness direction facing the indoor and the outdoor direction.

  The upper connection plate portion 223 connects the middle in the vertical direction of the upper outer plate portion 221 and the middle in the vertical direction of the upper inner plate portion 222.

  A pair of extending wall portions 226 and 227 extending toward the indoor side is provided on the upper portion of the upper outer plate portion 221. The pair of extending wall portions 226 and 227 are arranged at an interval in the vertical direction. The extending wall portion 226 is disposed above the extending wall portion 227.

  At the indoor end of the extending wall portion 226, a downward locking piece 226a extending downward is provided. An upward locking piece 227 a extending upward is provided at the indoor end of the extending wall portion 227.

  An airtight member 229 is provided at the upper end of the upper outer plate portion 221. The airtight member 229 includes a fixing portion 229a provided in a space surrounded by the upper outer plate portion 221 and the extending wall portions 226 and 227, and an airtight piece 229b extending from the fixing portion 229a to the indoor side. . The indoor-side end of the airtight piece 229 b is in contact with the surface on the outdoor side of the outdoor-side protruding frame wall portion 113 of the upper frame 11. The upper inner plate portion 222 is not provided with an airtight material.

  The structure of the upper eyelid 22 of the inner gutter 20B of the outer window 1 is the same as the structure of the upper eyelid 22 of the outer gutter 20A. An airtight member 229 is also provided in the inner shutter 20B of the outer window 1. The indoor-side end of the airtight piece 229 b provided on the inner-shutter 20 B is in contact with the outdoor-side surface of the indoor-side projecting frame wall portion 114 of the upper frame 11. An airtight material is not provided in the upper inner plate portion 222 of the internal seal 20B.

  Next, the anti-vibration member 224 provided on the door tip 24 (see FIG. 3) of the outer window 20A of the outer window 1 and the combination rod 25 (see FIG. 3) will be described.

  As shown in FIG. 3, in the inside of the door-toe bowl 24 and the combination bowl 25, a weir space T1 is formed over the entire up and down direction. Anti-vibration members 224 (see FIG. 4) are inserted and disposed at the upper end of the eyelid space T1.

  As shown in FIG. 4, each anti-vibration member 224 includes an outdoor-side anti-vibration part 224a disposed on the outdoor side in the eyebrow space T1 (see FIG. 3; the same applies hereinafter), and a house in the eyebrow space T1. It has an indoor side anti-vibration portion 224c disposed inside, and a lower anti-rotation portion 224b connecting the lower end portion of the outdoor side anti-rotation portion 224a and the lower end portion of the indoor side anti-rotation portion 224c. The outdoor side steady rest portion 224a, the indoor side steady rest portion 224c, and the lower steady rest portion 224b are integrally formed. The outdoor side projecting frame wall portion 113 of the upper frame 11 is disposed between the outdoor side steady rest portion 224a and the indoor side steady rest portion 224c. By sandwiching the outdoor side projecting frame wall portion 113 in the indoor and outdoor direction by the outdoor side steady rest portion 224a and the indoor side steady rest portion 224c, the movement of the exterior shoring 20A in the indoor and outdoor directions is restricted.

  Next, the anti-vibration member 225 provided on the door tip 24 of the inner shutter 20B of the outer window 1 and the combination rod 25 will be described.

  Each anti-vibration member 225 includes an outdoor side anti-vibration portion 225a disposed on the outdoor side in the eyebrow space T1, an indoor side anti-vibration portion 225c disposed on the indoor side in the eyebrow space T1, and an outdoor side Sway member It has a lower anti-vibration part (not shown) which connects the lower end part of stop part 225a, and the lower end part of indoor side shake control part 225c. The outdoor side steady rest portion 225a, the indoor side steady rest portion 225c, and the lower steady rest portion are integrally formed. The indoor side projecting frame wall portion 114 of the upper frame 11 is disposed between the outdoor side steady rest portion 225a and the indoor side steady rest portion 225c. By sandwiching the indoor side projecting frame wall portion 114 in the indoor and outdoor direction by the outdoor side steady rest portion 225a and the indoor side steady rest portion 225c, the indoor and outdoor movement of the inner shutter 20B is restricted.

Next, the screen vertical screen 34 (see FIG. 3; the same shall apply hereinafter) of the outer window 1 will be described.
At the upper end portion of the screen door longitudinal weir 34, there is provided a screen door anti-vibration portion 322 in which an engagement groove 321 recessed downward from the upper end portion is formed. In the engagement groove 321, the mesh door protruding frame wall portion 112 of the upper frame 11 of the outer window 1 is disposed, and the movement of the mesh door 30 in the indoor and outdoor directions is restricted.

Next, the ventilation unit 6 of the inner window 4 will be described.
FIG. 5 is an enlarged view of a portion D of FIG. FIG. 6 shows the configuration of the second ventilation part of the double sash 100, and is a view corresponding to the upper part of FIG.
As shown in FIGS. 5 and 6, the ventilation unit 6 is a gap between the upper frame (upper edge of the opening) R provided in the opening P and the upper frame 41 provided below the upper frame R. It is installed in R1. The ventilation unit 6 is installed on substantially the entire length of the opening P in the left-right direction. The ventilation unit 6 has a ventilation mechanism 60 and a cover body 70.

  The ventilation mechanism 60 includes an upper frame (upper member) 61, a lower frame (lower member) 62, a bridge 63, a first rotation valve body (first ventilation unit) 64 (see FIG. 5), and a fourth. And a second rotation valve body (second ventilation unit) 66 (see FIG. 6). The upper frame 61, the lower frame 62, the weir 63, the first pivoting valve body 64, and the second pivoting valve body 66 are made of a metal member such as aluminum.

  As shown in FIG. 5, the upper frame 61 is disposed along the lower surface of the upper frame portion R, and provided in the left-right direction of the upper frame R.

FIG. 7 is an exploded perspective view showing the structure of the ventilation mechanism 60. As shown in FIG.
As shown in FIG. 7, the upper frame 61 has an upper frame plate portion 611 disposed along the lower surface of the upper frame R (see FIG. 5, the same applies hereinafter). The upper frame plate portion 611 is formed in a flat plate shape, and is disposed with the plate thickness direction directed in the vertical direction. As shown in FIG. 5, the upper frame plate portion 611 is screwed to the upper frame R from below with a screw 612. The screw head of the screw 612 is covered with a side wall 63 described later.

  As shown in FIG. 7, on the upper surface of the upper frame plate portion 611, a plurality of upward pieces 613 protruding upward are provided at intervals in the indoor / outdoor direction. The upward pieces 613 are provided at a plurality of locations at the indoor-side end of the upper frame plate portion 611, the outdoor-side end, and the indoor-outdoor direction.

  At the outdoor-side end of the upper frame plate portion 611, a downward projecting piece 614 is provided. An upward piece 613 and a downward piece 614 are formed continuously in the vertical direction at the outdoor-side end of the upper frame plate portion 611.

  Downwardly projecting wall portions 616 and 617 projecting downward are provided in a pair on the lower surface of the upper frame plate portion 611 with an interval in the indoor side direction. The downward wall portion 616 is disposed more on the outdoor side than the downward wall portion 617.

  The lower end of the downward wall 616 is provided with a locking wall 618 extending toward the indoor side. At the lower end portion of the downward wall portion 617, a locking wall portion 619 extending toward the outdoor side is provided.

  The upper frame plate portion 611 is formed with a plurality of attachment holes 611 a and 611 b penetrating in the vertical direction. The mounting holes 611a and 611b are arranged in this order from the outdoor side to the indoor side.

  As shown in FIG. 5, the lower frame 62 is disposed along the upper surface of the upper frame 41 and provided in the left-right direction of the upper frame 41.

  As shown in FIG. 7, the lower frame 62 has a lower frame plate portion 621 disposed along the upper surface of the upper frame 41 (see FIG. 5, the same in the following). The lower frame plate portion 621 is formed in a flat plate shape, and is disposed with the plate thickness direction directed in the vertical direction.

FIG. 8 is an exploded perspective view showing the configuration of the lower part of the ventilation mechanism 60. As shown in FIG. In FIG. 8, the first pivoting valve body 64 and the second pivoting valve body 66 are not shown.
As shown in FIG. 8, on the upper surface of the lower frame plate portion 621, a plurality of upward ribs (second surfaces) 622 that protrude upward are provided at intervals in the left-right direction. The upward rib 622 is provided integrally with the lower frame plate 621.

  Each upward rib 622 is formed in a flat plate shape, and is disposed with the thickness direction facing the indoor and the outdoor direction. The plurality of upward ribs 622 are disposed on the same plane along the vertical direction and the left and right direction. Between the adjacent upward ribs 622, a bridge 63 and a sheet member 629, which will be described in detail later, are disposed.

  On the lower surface of the lower frame plate portion 621, a plurality of downwardly directed downward pieces 623 are provided at intervals in the indoor / outdoor direction. The downward pieces 623 are provided at a plurality of locations at the indoor-side end, the outdoor-side end, and the indoor / outdoor direction of the lower frame plate 621.

  At the outdoor-side end of the lower frame plate 621, an upward piece 624 projecting upward is provided. A downward piece 623 and an upward piece 624 are formed continuously in the vertical direction at the outdoor-side end of the lower frame plate portion 621.

  In the lower frame plate portion 621, an attachment hole 621a penetrating in the vertical direction, a working hole (through hole) 621b, and an attachment hole 621c are formed. The mounting hole 621a, the working hole 621b, and the mounting hole 621c are arranged in this order from the outdoor side to the indoor side.

  The working hole 621b is formed larger than the mounting holes 621a and 621c. The work hole 621 b is for inserting a screw 612 (see FIG. 5, the same applies hereinafter) for attaching the upper frame 61 to the upper frame R directly above.

  A sheet member 629 is provided between the upward ribs 622 on the upper surface of the lower frame plate portion 621.

  The sheet material 629 has a planar shape corresponding to a space R2 of a side 63 which will be described later. The sheet material is made of a highly airtight material such as a sealer.

  In the sheet member 629, an attachment hole 629a, a through hole 629b, and an attachment hole 629c which are vertically penetrated are formed. The mounting hole 629a, the through hole 629b, and the mounting hole 629c are arranged in this order from the outdoor side to the indoor side.

  The through hole 629 b is formed in a rectangular shape in plan view. The through hole 629 b is for inserting the screw 612 for attaching the upper frame 61 to the upper frame R directly above and for inserting the tip of the screw 439.

  The side walls 63 are provided on the top surface of the sheet 629. The side wall 63 has a rectangular cylindrical portion 631 formed in a rectangular cylindrical shape. A space R2 penetrating in the vertical direction is formed in the inside of the cross 63.

FIG. 9 is a cross-sectional view taken along the line E-E of FIG. 5 and shows the configuration of the ventilation unit 6. FIG. 10 is a view on arrow F of FIG.
As shown in FIGS. 9 and 10, a plurality of crosses 63 are provided at intervals in the left-right direction of the lower frame 62. The side walls 63 are arranged to separate the adjacent first rotary valve body 64 and the second rotary valve body 66. The crosses 63 are disposed between the upward ribs 622 disposed on the lower frame 62 at intervals in the left-right direction. In the present embodiment, the gutters 63 are provided at four places of two places at both ends in the left-right direction of the lower frame 62 and in the middle in the left-right direction.

  As shown in FIG. 8, the rectangular cylindrical portion 631 has a pair of side wall portions 632 oppositely disposed in the left-right direction, and a pair of front and rear wall portions 633 oppositely disposed in the indoor / outdoor direction.

  The outer surface of each side wall portion 632 is provided with a side rib (first surface) 634 that protrudes toward the opposite side (side) to the side wall portion 632 opposite to each other. The side ribs 634 are provided integrally with the side wall portion 632.

  As shown in FIG. 7, the side ribs 634 are formed in a flat plate shape, and are disposed with the thickness direction facing indoor / outdoor. The side rib 634 is disposed to abut on the upper side of the lateral end of the upward rib 622. The left and right ends of the upward rib may be configured to abut on the left and right ends of the side ribs.

  A screw threading portion 639 is provided on the inner surface of the front and rear wall portion 633 so as to protrude toward the facing front and rear wall portion 633 side.

  As shown in FIG. 8, the screws 621 d and 621 e respectively inserted into the mounting holes 621 a and 621 c of the lower frame 62 are screwed to the lower portion of the screw portion 639 of the cross bar 63.

  As shown in FIG. 7, the screws 611 c and 611 d respectively inserted into the attachment holes 611 a and 611 b of the upper frame 61 are screwed into the upper portion of the screw portion 639 of the cross section 63.

  As shown in FIG. 8, a screw (drill screw) 439 inserted into a mounting hole 436 of the lower frame 42 described later is screwed to the lower frame plate portion 621 of the lower frame 62. The screw 439 is inserted through the through hole 629 b of the sheet 629 and inserted in the space R 2 of the cross section 63. In other words, in a plan view, the screw 439 is disposed so as to overlap with the space portion R2 of the square 63.

  As shown in FIG. 5, downward pieces 614 of the upper frame 61 are provided along the upper portions of the front and rear wall portions 633 of the crossbar 63. An upward facing piece 624 of the lower frame 62 is provided along the lower part of the front and rear wall portions 633 of the bridge 63. In other words, with respect to the upper frame 61 and the lower frame 62, the facing 63 and the sheet material 629 (see FIG. 8) are disposed closer to the outdoor side.

  As shown in FIGS. 9 and 10, the first pivoting valve body 64 is disposed between two cross sections 63A disposed in the middle of the upper frame 61 and the lower frame 62 in the left-right direction. The second pivoting valve body 66 is disposed between a bridge 63 </ b> B and a bridge 63 </ b> A which are disposed at both ends of the upper frame 61 and the lower frame 62 in the left-right direction. That is, the first pivoting valve body 64 and the second pivoting valve body 66 are disposed at different positions in the left-right direction. The first pivoting valve body 64 opens to the outdoor side, and the second pivoting valve body 66 opens to the indoor side (see the arrow in FIG. 9).

  As shown in FIG. 7, the first pivoting valve body 64 includes a bearing portion 640 locked to the locking wall portions 618 and 619, and a valve portion 650 rotatably supported by the bearing portion 640. Have.

  The bearing portion 640 extends in the left-right direction. The bearing portion 640 has a substrate portion 641 disposed along the lower surface of the upper frame plate portion 611 of the upper frame 61, and a pair of support wall portions 642 and 643 extending downward from the substrate portion 641.

  The support wall portion 642 is disposed more on the outdoor side than the support wall portion 643. The lower end portion of the support wall portion 643 is located below the lower end portion of the support wall portion 642.

  The lower end portion of the support wall portion 643 is provided with a locking wall portion 644 extending toward the outdoor side.

  The valve portion 650 has a cylindrical shaft portion 651 extending in the left-right direction, and a valve main body 652 extending radially outward from the shaft portion 651.

  The shaft 651 is rotatably fitted in the space formed by the support wall 642, the substrate 641, the support wall 643, and the locking wall 644.

FIG. 11 is a view showing the valve portion 650, as viewed from the left side (or right side), and from the indoor side (or the outdoor side).
As shown in FIG. 11, an airtight member (abutment surface) 653 is provided on both sides in the left-right direction and the lower end (end opposite to the shaft 651) on one side of the valve main body 652 It is done. The valve unit 650 is disposed such that the airtight member 653 faces the indoor side.

  As shown in FIG. 5, the valve portion 650 is pivoted about the shaft portion 651 from the closed position in the posture arranged along the horizontal direction and the vertical direction (vertical plane), and the lower end portion is on the outdoor side. It can be turned to an open position (see a two-dot chain line) inclined to the outdoor side so as to face.

  In the closed position, the valve portion 650 closes the space P1 between the upper frame 61 and the lower frame 62, specifically, between the upper frame plate portion 611 of the upper frame 61 and the upward rib 622 of the lower frame 62. There is. The airtight member 653 of the valve portion 650 is in contact with the surface of the side rib 634 facing the outdoor side and the surface of the upward rib 622 facing the outdoor side. In the open position, the space P1 is open.

  As shown in FIG. 6, the second pivoting valve body 66 is installed with the bearing portion 640 and the valve portion 650 of the first pivoting valve body 64 reversed in the indoor and outdoor direction.

  In the second pivoting valve body 66, the support wall portion 642 of the bearing portion 640 is disposed indoors more than the support wall portion 643. The valve portion 650 is disposed such that the airtight member 653 faces the outdoor side.

  The valve portion 650 is inclined toward the indoor side so as to turn the lower end portion toward the indoor side by pivoting around the shaft portion 651 from the closed position in the posture disposed along the left and right direction and the vertical direction (vertical plane) It can be turned to the open position (see the two-dot chain line) in the above posture.

  In the closed position, the valve portion 650 closes the space P1 between the upper frame 61 and the lower frame 62, specifically, between the upper frame plate portion 611 of the upper frame 61 and the upward rib 622 of the lower frame 62. There is. The airtight material 653 of the valve portion 650 is in contact with the surface of the side rib 634 facing the indoor side and the surface of the upward rib 622 facing the indoor side. In the open position, the space P1 is open.

  As shown in FIG. 9, the length L1 in the left-right direction of the portion where the first pivoting valve body 64 is installed is the length L2 in the left-right direction of the portion where the second pivoting valve body 66 is installed Longer than the sum with L3. The height H1 of the space P1 of the portion where the first pivoting valve body 64 is installed (see FIG. 5; the same applies hereinafter) and the height of the space P1 of the portion where the second pivoting valve body 66 is installed H2 (see FIG. 6; the same below) is the same. Therefore, the total opening area (about L1 × H1) of the part where the first pivoting valve body 64 is installed is the total opening area of the part where the second pivoting valve body 66 is installed (about (L2 + L3) × H2) Greater than. In addition, total opening area is the sum total of the opening area of the part in which each rotation valve body is installed.

  As shown in FIG. 5, the cover body 70 has an upper cover 71 and a lower cover 72. The cover body 70 is disposed more indoors than the first pivoting valve body 64, the second pivoting valve body 66 (see FIG. 6, the same applies in the following) of the ventilation mechanism 60, and the weir 63.

  The upper cover 71 is provided over the entire length of the upper frame 61 in the left-right direction. The upper cover 71 includes an upper plate portion 711, an upward plate portion 712, and a downward plate portion (upper cover portion) 713.

  The upper side plate portion 711 is formed in a flat plate shape, and is disposed with the plate thickness direction directed in the vertical direction. The upper plate portion 711 is disposed along the lower surface of the upper frame plate portion 611 of the upper frame 61.

  The upward plate portion 712 extends upward from the indoor-side end of the upper plate portion 711. The upward plate portion 712 is disposed along the surface facing the indoor side of the upward piece 613 of the upper frame 61.

  The downward plate portion 713 is formed in a flat plate shape, and is disposed with the plate thickness direction facing the indoor / outdoor direction. The downward plate portion 713 extends downward from the outdoor-side end of the upper plate portion 711. The downward plate portion 713 is disposed along the front and rear wall portions 633 facing the indoor side of the bridge 63.

  The upper cover 71 is fixed to the upper frame plate portion 611 of the upper frame 61 by screws 714 from the lower side of the upper plate portion 711. The upper cover 71 is disposed on the indoor side of the first pivoting valve body 64 and the second pivoting valve body 66 with an interval.

  The lower cover 72 is provided over the entire length of the lower frame 62 in the left-right direction. The lower cover 72 is disposed vertically below the upper cover 71. The lower cover 72 includes a lower side plate portion 721, an upward plate portion (lower side cover portion) 722, and a downward plate portion 723.

  The lower side plate portion 721 is formed in a flat plate shape, and is disposed with the thickness direction facing in the vertical direction. The lower side plate portion 721 is disposed along the upper surface of the lower frame plate portion 621 of the lower frame 62. The outdoor-side end of the lower side plate portion 721 reaches the vicinity of the front and rear wall portion 633 facing the indoor side of the bridge 63.

  The upward plate portion 722 extends upward from the indoor-side end of the lower plate portion 721. The upward plate portion 722 is disposed directly below the upward plate portion 712 of the upper cover 71.

  The upward plate portion 722 is disposed more indoor than the downward plate portion 713 of the upper cover 71. Further, the upper end portion of the upward plate portion 722 is disposed slightly lower than the lower end portion of the downward plate portion 713 (not disposed overlapping as viewed from the indoor / outdoor direction).

  The downward plate portion 723 is formed in a flat plate shape, and is disposed with the plate thickness direction facing the indoor and the outdoor direction. The downward plate portion 723 is disposed along the indoor side end of the upper frame 41.

  The lower cover 72 is fixed to the lower frame plate portion 621 of the lower frame 62 by screws 724 from above the lower plate portion 721. The lower cover 72 is disposed on the indoor side of the first pivoting valve body 64 and the second pivoting valve body 66 with an interval.

  In order to secure the inflow of air, the following intervals are all made equal to the equal intervals or reference intervals (lengths). The distance from the upper side plate portion 711 to the upper end portion of the upward plate portion 722, the distance from the upward plate portion 722 to the downward plate portion 713, the distance from the lower side plate portion 721 to the lower end portion of the downward plate portion 713, the upper and lower sides of the space portion P1. , The distance from the lower end of the downward piece 614 of the upper frame 61 to the upper end of the upward piece 624 of the lower frame 62, the valve portion when the valve portion 650 of the first rotary valve body 64 is in the open position A distance between the lower frame plate portion 621 and the lower frame plate portion 621, a distance between the lower end portion of the valve portion 650 and the upper end portion of the upward piece 624 of the lower frame 62 when the valve portion 650 of the first pivoting valve body 64 is in the open position; The space between the lower end of the valve portion 650 and the lower plate portion 721 when the valve portion 650 of the second rotary valve body 66 is in the open position.

  Further, as shown in FIG. 6, when the valve portion 650 of the second rotary valve body 66 is in the open position, the lower end portion of the valve portion 650 and the lower side plate portion 721 are provided wider than the reference interval Therefore, even if the valve portion 650 comes in contact with the upper cover 71, a sufficient or ventilation amount can be secured.

  When the ventilation unit 6 described above is attached to the upper frame R, the ventilation unit 6 is assembled in advance. First, the upper cover 71 is installed at the indoor-side end of the upper frame 61 and fixed by screws 714 from the lower side. The lower cover 72 is installed at the indoor side end of the lower frame 62 and fixed by screws 724 from above. Then, the sheet member 629 is placed on the lower frame 62, and the side stand 63 is placed thereon. The screws 621 d and 621 e are inserted into the attachment holes 621 a and 621 c of the lower frame 62, and screwed to the lower portion of the screw portion 639 of the cross bar 63. Next, the upper frame 61 is installed on the side 63. The screws 611 c and 611 d are inserted into the attachment holes 611 a and 611 b of the upper frame 61, and screwed to the upper portion of the screw portion 639 of the crosspiece 63.

  Next, the screw 612 is inserted into the working hole 621b of the lower frame 62 and the through hole 629b of the sheet material 629, and the upper frame 61 is screwed to the upper frame R. Thereby, the ventilation unit 6 is attached to the upper frame R.

Next, the upper frame 41 of the inner window 4 will be described.
As shown in FIG. 5, the upper frame 41 has an upper frame plate portion 411, an outdoor side projecting portion 412 extending downward from the upper frame plate portion 411, an indoor side projecting portion 422 and a downward frame wall portion 429. ing. The outdoor side protrusion 412, the indoor side protrusion 422, and the downward frame wall 429 are arranged in this order from the outdoor side to the indoor side.

  The upper frame plate portion 411 is formed in a flat plate shape, and is disposed with the plate thickness direction directed in the vertical direction. The upper frame plate portion 411 is disposed along the lower frame plate portion 621 of the lower frame 62.

  The outdoor side projecting portion 412 extends downward from the upper frame plate portion 411, and has a pair of outdoor side projecting frame wall portions 413 and 414 arranged at intervals in the indoor and outdoor directions, and a pair of outdoor side projecting frame wall portions The outdoor side connection frame wall part 415 which connects the lower end parts of 413,414 is provided. The outdoor side projecting frame wall portion 413 is disposed more on the outdoor side than the outdoor side projecting frame wall portion 414.

  The indoor side projecting portion 422 extends downward from the upper frame plate portion 411, and has a pair of indoor side projecting frame wall portions 42 3 and 24 arranged at intervals in the indoor / outdoor direction, and a pair of indoor side projecting frame wall portions The indoor side connection frame wall part 425 which connects lower end parts of 423,424. The indoor side projecting frame wall portion 423 is disposed more on the outdoor side than the indoor side projecting frame wall portion 424.

  The downward frame wall portion 429 is formed in a flat plate shape, and is disposed with the plate thickness direction facing the indoor and the outdoor direction.

  In the upper frame plate portion 411, a plurality of attachment holes 436 penetrating in the vertical direction are formed between the outdoor side projecting portion 412 and the indoor side projecting portion 422. A screw 439 inserted into the mounting hole 436 is screwed into the lower frame 62. The mounting hole 436 is disposed so as to overlap the space R2 of the gutter 63 in a plan view.

Next, the upper eyelid 52 of the outer seal 50A of the inner window 4 will be described.
The upper rod 52 connects the upper outer plate portion 521 disposed on the outdoor side, the upper inner plate portion 522 disposed on the indoor side, the upper outer plate portion 521, and the upper inner plate portion 522. And 523.

  The upper outer plate portion 521 and the upper inner plate portion 522 are formed in a flat plate shape, and are disposed so that the plate thickness direction is directed to the indoor / outdoor direction.

  The upper connection plate portion 523 is formed in a flat plate shape, and is disposed with the plate thickness direction oriented in the vertical direction. The upper connecting plate portion 523 connects the middle in the vertical direction of the upper outer plate portion 521 and the middle in the vertical direction of the upper inner plate portion 522.

  At the upper end of the upper outer plate portion 521, an extending wall portion 526 extending toward the indoor side is provided. At the indoor side end of the extension wall 526, a mounting wall 527 extending downward is provided.

  An airtight material 529 is provided on the surface of the mounting wall 527 on the indoor side. The airtight member 529 includes a fixing portion 529a fixed to the mounting wall 527 and an airtight piece 529b extending upward as it goes from the lower end of the fixing portion 529a to the indoor side. The indoor-side end (upper end) of the airtight piece 529 b is in contact with the surface on the outdoor side of the outdoor-side protruding frame wall portion 413 of the upper frame 41.

  At the upper end of the upper inner plate portion 522, an extension wall portion 536 extending toward the outdoor side is provided. At the outdoor-side end of the extension wall portion 536, a mounting wall portion 537 extending downward is provided.

  An airtight material 539 is provided on the surface of the mounting wall 537 on the outdoor side. The airtight member 539 includes a fixing portion 539a fixed to the mounting wall 537, and an airtight piece 539b extending upward as it goes from the lower end of the fixing portion 539a to the outdoor side. The outdoor side end (upper end) of the airtight piece 539 b is in contact with the indoor side surface of the outdoor side projecting frame wall portion 414 of the upper frame 41.

  The structure of the upper eyelid 52 of the inner gutter 50B of the inner window 4 is the same as the structure of the upper eyelid 52 of the outer gutter 50A. Airtight members 529 and 539 are also provided in the inner window 50B of the inner window 4. The indoor end (upper end) of the airtight piece 529 b of the airtight member 529 abuts on the outdoor side surface of the indoor side projecting frame wall portion 423 of the upper frame 41. The outdoor side end (upper end) of the airtight piece 539 b of the airtight material 539 abuts on the indoor side surface of the indoor side projecting frame wall portion 424 of the upper frame 41.

Next, the flow and pressure of air when negative pressure occurs in the above-described double sash 100 will be described.
When a negative pressure is generated in the closed state where the outer window 1 and the inner window 4 are closed, the valve portion 650 of the first rotary valve body 64 in the inner window 4 as shown by a two-dot chain line in FIG. It pivots around the shaft portion 651 and pivots to an open position inclined to the outdoor side so that the lower end portion faces the outdoor side. Thus, air flows from the indoor side to the outdoor side. In addition, the valve part 650 of the 2nd rotation valve body 66 is in a closed position.

FIG. 12 is a diagram showing the behavior when negative pressure occurs in the outer window 1 of the double sash 100. As shown in FIG.
Further, as shown in FIG. 12, when the outer shutter 20A and the inner shutter 20B receive negative pressure and are displaced to the outdoor side at the outer window 1, the indoor-side steady portion 224c of the steadying member 224 of the outer case 20A is turned up. It abuts on the indoor surface of the outdoor side projecting frame wall portion 113 of the frame 11. Further, the indoor-side steady rest portion 225 c of the steady-state stop member 225 of the inner scissor 20 B abuts the indoor-side surface of the indoor-side protruding frame wall portion 114 of the upper frame 11. A clearance S1 is generated between the upper inner plate portion 222 of the outer shoji 20A and the inner shoji 20B and the outdoor side projecting frame wall portion 113 and the indoor side projecting frame wall portion 114, respectively.

  Further, gaps S2 respectively formed are formed between the airtight members 229 of the outer shingles 20A and the inner shingles 20B and the outdoor side projecting frame wall portion 113 and the indoor side projecting frame wall portion 114.

  In FIG. 12, the behavior of both end portions in the left-right direction of the upper outer plate portion 221, the upper inner plate portion 222, and the upper connecting plate portion 223 of the outer shell 20A and inner shell 20B is indicated by a two-dot chain line. The behavior on the central side in the left-right direction of the upper inner plate portion 222 and the upper connecting plate portion 223 is indicated by a solid line. The indoor-side steady rest portion 224c of the steady-state rest member 224 and the indoor-side steady rest portion 225c of the steady-state rest member 225 are provided on the outdoor side projecting frame wall portion 113 and the barb at the both end sides of the shingles 20A and the inner shingles 20B. The displacement of the outer insulator 20A and the inner insulator 20B is suppressed by coming into contact with the inner projecting frame wall portion 114. At the center side in the left-right direction of the outer shoji 20A and the inner shoji 20B, the outer side is displaced so as to be bent to the outdoor side than the both end sides in the left-right direction. Thus, the gap S2 is larger at the center side in the left-right direction.

  As described above, the air that has passed through the inner window 4 is from the space between the inner window 4 and the outer window 1 to the upper inner plate portion 222 and the indoor side projecting frame wall portion of the upper shell 22 of the inner gutter 20B of the outer window 1 It passes through the gap S1 between it and 114, and passes through the gap S2 between the airtight material 229 of the upper frame 22 and the indoor side projecting frame wall portion 114 of the upper frame 11. Furthermore, the air passes through the gap S1 between the upper inner plate portion 222 of the upper shell 22 of the outer shoji 20A and the outdoor side projecting frame wall portion 113, and the air tight member 229 of the upper shell 22 and the bar of the upper frame 11 It passes through the gap S2 between the outer projecting frame wall 113 and the other.

  As described above, since a gap (flow path of air) is generated by communicating from the inner window 4 to the outer window 1, the pressure difference between the indoor side and the outdoor side of the inner window 4 is reduced.

  In addition, when a positive pressure is generated, as shown by a two-dot chain line in FIG. 6, in the inner window 4, the valve portion 650 of the second rotary valve body 66 rotates around the shaft portion 651, and the lower end portion To the open position inclined to the indoor side so as to direct the indoor side. Thus, the air flows from the outdoor side to the indoor side. The valve portion 650 of the first pivoting valve body 64 is in the closed position. In addition, in the outer window 1, air can be circulated from each gap, such as a gap between a windproof plate (not shown) and the shoji 20A or 20B.

  In the double sash 100 configured as described above, when negative pressure is generated in the closed state in which the outer window 1 and the inner window 4 are closed, the first pivoting valve body 64 in which air is opened in the inner window 4. Distribute from the indoor side to the outdoor side. In addition, when a positive pressure is generated in the closed state in which the outer window 1 and the inner window 4 are closed, air flows from the outdoor side to the indoor side in the open second ventilating section 66 in the inner window 4. Therefore, when negative pressure and positive pressure are generated, a flow path of air communicated from the indoor side to the outdoor side of the inner window 4 is formed, so the pressure difference between the indoor side and the outdoor side of the inner window 4 (inner window 4 The pressure applied to the inner window 4 can be reduced, and detachment of the outer case 50A and the inner case 50B of the inner window 4 from the frame 40 is suppressed.

  Moreover, the 1st rotation valve body 64 and the 2nd ventilation part 66 are arrange | positioned in the position which differs in the left-right direction. Therefore, by adjusting the total opening area of the first rotary valve body 64 and the total opening area of the second ventilation unit 66, the ventilation volume of the first rotary valve body 64 and the second ventilation unit 66 is adjusted. Can.

  Moreover, the total opening area of the part in which the 1st rotation valve body 64 is installed is larger than the total opening area of the part in which the 2nd rotation valve body 66 is installed. Therefore, when a negative pressure is generated, the flow path of the air communicated from the indoor side to the outdoor side of the inner window 4 can be surely formed. Therefore, the pressure difference between the indoor side and the outdoor side of the inner window 4 (inner window 4 The pressure applied to the) can be reliably reduced.

  In addition, in the gap R1 between the upper frame R and the upper frame 41, the air can be circulated from the indoor side to the outdoor side at the time of negative pressure at both end portions in the left-right direction. In addition, in the middle portion in the left-right direction in the gap R1, air can flow from the outdoor side to the indoor side at the time of positive pressure by the second rotary valve body 66.

  In addition, in the gap R1 in which the first pivoting valve body 64 and the second pivoting valve body 66 are disposed, a method 63 for dividing the first pivoting valve body 64 and the second pivoting valve body 66 is disposed. It is done. Therefore, since the air flowing through the first pivoting valve body 64 and the air circulating through the second pivoting valve body 66 are blocked by the bias 63, the obstruction of the flow of air is suppressed.

  In addition, when the ventilation mechanism 60 is looked up from the indoor side, the lower part of the ventilation mechanism 60 is hidden by the upward plate portion 722 of the cover 70 provided on the indoor side of the ventilation mechanism 60 The cover 60 provided on the indoor side of the mechanism 60 can be hidden by the downward plate portion 713 and difficult to visually recognize, and the appearance can be made favorable.

  Further, since the downward plate portion 713 and the upward plate portion 722 are provided on the indoor side relative to the gutter 63, the exposure of the portion on the indoor side of the gutter 63 in the ventilation mechanism 60 can be reliably suppressed.

  Moreover, the same valve part 650 is used by the 1st rotation valve body 64 and the 2nd ventilation part 66, and the direction of indoor and outdoor direction is changed and installed. Therefore, the valve part 650 can be made common in the 1st rotation valve body 64 and the 2nd ventilation part 66. FIG.

  In addition, the airtight material 653 of the valve portion 650 abuts on a side rib 634 extending in the left-right direction from the cross rail 63 and an upward rib 622 extending upward from the lower frame 62. Therefore, in the 1st rotation valve body 64 and the 2nd rotation valve body 66, the state which interrupted | blocked circulation of the air of indoor and outdoor direction reliably is maintainable.

(Modification 1)
Next, a first modification of the embodiment of the present invention will be described mainly with reference to FIG.
In the following description, the same members as those described above are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 13 is a perspective view showing a part of a double sash ventilation mechanism according to a first modification of the embodiment of the present invention. In FIG. 13, the first pivoting valve body 64 (see FIG. 5, the same applies hereinafter) and the second pivoting valve body 66 (see FIG. 6, the same applies hereinafter) are not shown.
As shown in FIG. 13, the ventilation unit 6X of this modification has a cover member 70X provided across the indoor end of the upper frame 61X and the indoor end of the lower frame 62X.

  At the outdoor-side end of the upper frame 61X, a locking groove 660 opening upward is formed. The locking groove 660 is a downward wall 661 extending downward from the indoor-side end of the upper frame plate 611 of the upper frame 61 and an extension wall extending downward from the lower end of the downward wall 661 toward the indoor side A portion 662 and an end wall portion 663 extending upward from the indoor end of the extending wall portion 662 are provided.

  A locking groove 670 opening downward is formed at the outdoor-side end of the lower frame 62X. The locking groove 670 is an upwardly extending wall portion 671 extending upward from the indoor side end of the lower frame plate portion 621 of the lower frame 62, and an extending wall extending inwardly from the upper end portion of the upward wall portion 671 A portion 672 and an end wall portion 673 extending downward from the indoor end of the extending wall portion 672 are provided.

  The cover member 70X has a ventilating plate portion 701 disposed along a surface along the left-right direction and the up-down direction. The ventilation plate portion 701 is formed in a flat plate shape, and is disposed with the plate thickness direction facing in and out.

  In the ventilation plate portion 701, a plurality of ventilation holes 702 penetrating in the indoor and outdoor directions are formed at intervals in the left and right direction. The ventilation hole 702 is in the form of an elongated hole which is long in the vertical direction. Indoor and outdoor circulation of air is enabled through the ventilation holes 702.

  At the upper end portion of the ventilation plate portion 701, a locking portion 703 is provided. The locking portion 703 includes an extending wall portion 704 extending from the upper end of the ventilation plate portion 701 to the outdoor side, and a downward wall portion 705 extending downward from the outdoor side end of the extending wall portion 704; have.

  The downward wall portion 705 of the locking portion 703 is locked to a locking groove 660 provided at the upper end portion of the upper frame 60X.

  At the lower end portion of the ventilation plate portion 701, a locking portion 707 is provided. The locking portion 707 includes an extending wall portion 708 extending outward from the lower end portion of the ventilation plate portion 701, and an upward wall portion 709 extending upward from the outdoor side end portion of the extending wall portion 708; have.

  The upward wall portion 709 of the locking portion 707 is locked in a locking groove 670 provided at the lower end portion of the upper frame 60X.

  In the double sash configured as described above, when a negative pressure is generated in the closed state in which the outer window 1 and the inner window 4 are closed, the air in the inner window 4 is the indoor side of the first rotary valve body 64. It distributes from the outside to the outside. In addition, when a positive pressure is generated in the closed state in which the outer window 1 and the inner window 4 are closed, air flows from the outdoor side to the indoor side in the second ventilation unit 66 in the inner window 4. Therefore, when negative pressure and positive pressure are generated, a flow path of air communicated from the indoor side to the outdoor side of the inner window 4 is formed, so the pressure difference between the indoor side and the outdoor side of the inner window 4 (inner window 4 The pressure applied to the inner window 4 can be reduced, and detachment of the outer case 50A and the inner case 50B of the inner window 4 from the frame 40 is suppressed.

  Moreover, since the indoor side of the ventilation mechanism 60 is covered with the cover member 70X in the vertical direction and the left-right direction, the exposure of the ventilation mechanism 60 to the indoor side can be further suppressed.

(Modification 2)
Next, a second modification of the embodiment of the present invention will be described mainly with reference to FIG.
FIG. 14 is a perspective view showing a part of a double sash ventilation mechanism according to a second modification of the embodiment of the present invention.
In the embodiment shown above, the side ribs 634 of the side walls 632 of the side walls 63Y are provided integrally with the side ribs 634. However, in the present modification, as shown in FIG. It is screwed to the side wall portion 632.

  The L fitting 635 has a mounting wall 636 disposed along the outer surface of the side wall 632, and a projecting wall 637 projecting laterally from the indoor end of the mounting wall. There is. The mounting wall portion 636 is fixed to the side wall portion 632 of the side wall 63Y with a screw 638. An airtight member 653 (see FIG. 7, the same applies in the following) provided in the valve portion 650 of the first pivoting valve body 64 can be in contact with the surface of the projecting wall portion 637 facing the outdoor side. Further, the airtight member 653 provided in the valve portion 650 of the second rotary valve body 66 can be in contact with the surface of the projecting wall portion 637 facing the indoor side.

  In the double sash configured as described above, when a negative pressure is generated in the closed state in which the outer window 1 and the inner window 4 are closed, the air in the inner window 4 is the indoor side of the first rotary valve body 64. It distributes from the outside to the outside. In addition, when a positive pressure is generated in the closed state in which the outer window 1 and the inner window 4 are closed, air flows from the outdoor side to the indoor side in the second ventilation unit 66 in the inner window 4. Therefore, when negative pressure and positive pressure are generated, a flow path of air communicated from the indoor side to the outdoor side of the inner window 4 is formed, so the pressure difference between the indoor side and the outdoor side of the inner window 4 (inner window 4 The pressure applied to the inner window 4 can be reduced, and detachment of the outer case 50A and the inner case 50B of the inner window 4 from the frame 40 is suppressed.

  The shapes, combinations, and the like of the constituent members shown in the above-described embodiment are merely examples, and various changes can be made based on design requirements and the like without departing from the spirit of the present invention.

  For example, in the embodiment described above, the first pivoting valve body 64 and the second pivoting valve body 66 are disposed at different positions in the left-right direction, but the present invention is not limited to this. The first ventilation unit and the second ventilation unit may be disposed at different positions in the vertical direction.

  Further, in the embodiment described above, the ventilation mechanism 60 is provided in the gap R1 between the upper frame R and the upper frame 41 of the opening P, but the present invention is not limited to this. A gap may be formed between the lower edge of the opening P and the lower frame, and the ventilation mechanism may be installed in the gap. Alternatively, a gap may be formed between the lateral edge of the opening P and the vertical frame, and the ventilation mechanism may be installed in the gap. In this case, the lower cover of the cover body extends upward from the lower edge of the opening, the upper cover extends downward from the lower frame, and the upper cover is the lower cover. It is preferable to arrange | position indoors rather than a part. As a result, when the ventilation mechanism is viewed from the indoor side, the lower part of the ventilation mechanism is hidden by the lower cover part and difficult to visually recognize, and the upper part of the ventilation mechanism is hidden by the upper cover part and difficult to be visually recognized. it can. In addition, since the upper cover portion and the lower cover portion are disposed apart from each other in the indoor / outdoor direction, it is also possible to secure an air flow path.

  Moreover, in the embodiment shown above, although the upper cover 71 and the lower cover 72 are not overlapped and arrange | positioned seeing from indoor-outdoor direction, this invention is not limited to this. The upper cover 71 and the lower cover 72 may be arranged to overlap when viewed from the indoor and outdoor directions. As a result, when viewed from the indoor side, visual recognition of the ventilation mechanism 60 is further suppressed.

  Moreover, in the embodiment shown above, although the outer window 1 is a pulling sash, the present invention is not limited to this. The outer window may be a single sliding door or a raised and lowered window as long as air can be circulated indoors and out when pressure is generated.

  Moreover, in embodiment shown above, although the glass 29, 59 of the outer window 1 and the inner window 4 is a plate glass of a single | mono layer, respectively, this invention is not limited to this, A multilayer glass etc. may be sufficient.

  Further, in the case of the outer shell 50A of the inner window 4, airtight members 529 and 539 are respectively provided on the outdoor side and the indoor side of the outdoor side projecting portion 412, and airtightness is secured on both sides indoors and outdoors with the outdoor side projecting portion 412 interposed therebetween. ing. In addition, air-tight members 529 and 539 are provided on the outdoor side and the indoor side of the indoor side projecting portion 422, respectively, and the airtightness of the indoor window 50 of the inner window 4 is secured on both the indoor and outdoor sides with the indoor side projecting portion 422 interposed. ing. That is, the inner window 4 of the present embodiment is highly airtight, and a large negative pressure is likely to act on the inner window 4 when a negative pressure is generated. Therefore, it is possible to reduce the pressure of the intermediate layer M by forming a flow path of air communicated from the intermediate layer M (refer to FIG. 2) to the gaps S1 and S2 formed in the outer window 1. It is an important configuration in order to prevent the outer case 50 </ b> A and the inner case 50 </ b> B of the window 4 from coming off the frame 40.

DESCRIPTION OF SYMBOLS 1 ... Outer window 4 ... Inner window 6 ... Ventilation unit 10, 40 ... Frame 11, 41 ... Upper frame 12, 42 ... Lower frame 13, 43 ... Vertical frame 20A, 50A ... Outer shoji 20B, 50B ... inner shoji 21, DESCRIPTION OF SYMBOLS 51 ... Body 22, 52 ... Upper cage 23, 53 ... Lower blade 24, 54 ... Door tip 25, 55 ... Combination collar 27, 57 ... Glass holding groove 29, 59 ... Glass 30 ... Screen door 60 ... Ventilation mechanism 61 ... Upper frame (upper member)
62 ... Lower frame (lower member)
63 ... mullion 64 ... first rotary valve body (first ventilation section)
66 ... 2nd rotation valve body (2nd ventilation part)
70 ... cover body 71 ... upper cover 72 ... lower cover 100 ... double sash 439 ... screw 612 ... screw 622 ... upward rib (second surface)
629 ... sheet material 634 ... side rib (first surface)
650 ··· Valve section 653 · · · Sealing material (contact surface)
713 ... downward plate portion (upper cover portion)
722 ... upward plate (lower cover)
P: opening R1: gap R2: space W: wall

Claims (10)

A double sash installed at an opening of a building and having an outer window and an inner window disposed on the indoor side of the outer window,
The inner window is
A frame provided with a gap from the edge of the opening;
A ventilation mechanism provided in the gap formed between the edge of the opening and the frame;
And a shoji provided in the frame;
The ventilation mechanism is
A first ventilation unit that allows air to flow in and out indoors when pressure from the indoor side to the outdoor side is generated;
A second ventilation unit that allows air to flow in and out indoors when pressure from the outdoor side to the indoor side is generated;
The double sash is characterized in that the first ventilation unit and the second ventilation unit are disposed at different positions in at least one of the left and right direction and the up and down direction.   The double sash according to claim 1, wherein a total opening area of the first ventilation unit is configured to be larger than a total opening area of the second ventilation unit. The ventilation mechanism is provided in the gap between the upper edge of the opening and the upper frame of the frame or in the gap between the lower edge of the opening and the lower frame of the frame ,
The second ventilation units are respectively provided at both ends in the left-right direction of the gap,
The double sash according to claim 1 or 2, wherein the first ventilation unit is provided between the second ventilation units provided at both ends in the left-right direction. The ventilation mechanism is provided in the gap between the upper edge of the opening and the upper frame,
It has a bridge disposed between the upper edge of the opening and the upper frame,
The double sash according to claim 1 or 2, wherein the cross section divides the first ventilation unit and the second ventilation unit. The ventilation mechanism is
A cover body is provided on the indoor side of the first ventilation unit or the second ventilation unit of the ventilation mechanism,
The cover body is
An upper cover portion extending downward from the upper edge side of the opening;
And a lower cover portion extending upward from the upper frame side,
The double sash according to claim 4, wherein the lower cover portion is disposed more indoor than the upper cover portion.   The double sash according to claim 5, wherein the upper cover portion and the lower cover portion are provided indoors more than the side walls. The ventilation mechanism is provided in the gap between the lower edge of the opening and the lower frame of the frame;
And a cover body provided on the indoor side of the first ventilation unit or the second ventilation unit of the ventilation mechanism,
The cover body is
A lower cover portion extending upward from the lower edge side of the opening;
And an upper cover portion extending downward from the lower frame side,
The double sash according to claim 1 or 2, wherein the upper cover portion is disposed more indoor than the lower cover portion. The ventilation mechanism is provided in the gap between the left and right edges of the opening and the vertical frame of the frame.
The second ventilation units are respectively provided at both ends in the vertical direction of the gap,
The double sash according to claim 1 or 2, wherein the first ventilation unit is provided between the second ventilation units provided at both end portions in the vertical direction. Each of the first ventilation unit and the second ventilation unit has a valve unit that can be turned with the left and right direction as an axial direction,
The valve unit in the first ventilation unit is rotatably provided from a posture along a vertical surface to a posture inclined toward the outdoor side,
The double sash according to any one of claims 4 to 6, wherein the valve section in the second ventilation section is rotatably provided from an attitude along a vertical surface to an attitude inclined to the indoor side. The ventilation mechanism is
An upper member disposed along the upper edge of the opening;
And a lower member disposed along the upper frame,
The cross section is disposed between the upper member and the lower member,
The first ventilation unit and the second ventilation unit are
A first surface extending in the lateral direction from the side stand;
Each having a second surface extending upward from the lower member;
The double sash according to claim 9, wherein the valve portion has an abutment surface that abuts on the first surface and the second surface.

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