Sash structure

Abstract

To provide a sash structure capable of preventing infiltration of rainwater into a mullion.SOLUTION: A sash structure has a mullion 5 which extends in a vertical direction to support a glass plate 7. A first hollow section 571, a second hollow section 572, and a third hollow section 573 which are arranged at mutually different positions in an indoor-outdoor direction are provided inside the mullion 5. The sash structure comprises an outside air introducing section which introduces outside air into at least the first hollow section 571 on the outdoor side among the hollow sections.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] This disclosure relates to a sash structure.

Background Art

[0002] As a sash used for indoor partitions such as those used in stores, etc., a sash having a stile that extends vertically and supports a facing material such as glass, as disclosed in Patent Document 1 for example, is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The indoor sash disclosed in Patent Document 1 is not assumed to be exposed to rain and wind. When installing such a sash outdoors, it is necessary to take measures to prevent rainwater from entering the inside of the stile.

[0005] An object of this disclosure is to provide a sash structure capable of preventing rainwater from entering the inside of the stile.

Means for Solving the Problems

[0006] To achieve the above object, the sash structure according to this disclosure has a stile that extends vertically and supports a facing material And a lower frame that extends horizontally and to which the lower end of the mullion is connected, and two or more hollow portions are provided inside the stile, which are arranged at different positions in the indoor-outdoor direction from each other, and an outside air introduction portion for introducing outside air is provided in at least the outside hollow portion on the outdoor side among the hollow portions The lower frame has an air intake hole for introducing outside air into the interior, and the air intake section is formed in the mullion and has an air intake hole between the lower frame mullions for introducing the outside air introduced into the interior of the lower frame into the hollow part on the outdoor side. .

Brief Description of the Drawings

[0007] [Figure 1]This is a front view of the window frame. [Figure 2] This is a cross-sectional view along line AA in Figure 1. [Figure 3] This is a cross-sectional view along line BB in Figure 1. [Figure 4] This is a horizontal cross-section of the mullion. [Figure 5] This is a perspective view of the transom upper glass groove and mullion glass groove. [Figure 6] This is a side view of the mullion, seen from one side in the width direction. [Figure 7] This is a perspective view of the transom upper glass groove and mullion glass groove. [Figure 8] This is a side view of the mullion as seen from the other side in the width direction. [Figure 9] This is a vertical cross-section perpendicular to the width direction of the transom. [Figure 10] This is a perspective view showing the first non-visible outside air intake vent. [Figure 11] This is a top view of the transom. [Figure 12] This is a vertical cross-section perpendicular to the width direction of the lower frame. [Figure 13] This is a view of the lower frame from the outside. [Figure 14] This is a view of the mullion from the inside. [Figure 15] This is a side view of the lower part of the mullion, seen from one side in the width direction. [Figure 16] This is a side view of the lower part of the mullion, seen from the other side in the width direction. [Modes for carrying out the invention]

[0008] The sash 1 shown in Figures 1 to 3 is installed in a wall with one side facing the outdoors and the other side facing the indoors. The horizontal direction along the surface of the wall is referred to as the width direction. In the drawings, the width direction is indicated by arrow X. The direction perpendicular to the width direction is referred to as the indoor / outdoor direction. In the drawings, the indoor / outdoor direction is indicated by arrow Y. In the drawings, the outdoors is indicated by reference numeral 11 and the indoors by reference numeral 12. The sash 1 has a bottom frame 2, an upper frame 3, a pair of vertical frames 4,4, a mullion 5, and a transom 6. The sash 1 supports a glass plate 7. The bottom frame 2, the upper frame 3, and the pair of vertical frames 4,4 constitute a four-sided frame. The mullion 5 extends in the vertical direction. The transom 6 extends in the width direction. One end of the transom 6 in the width direction is connected to the vertical intermediate part of the vertical frame 4. The other end of the transom 6 in the width direction is connected to the vertical intermediate portion of the mullion 5. The structure of the sash 1 corresponds to the sash structure of the claims. The glass plate 7 corresponds to the facing material of the claims.

[0009] The transom 6 has a first transom outside air inlet 671 for introducing outside air into its interior. The outside air introduced into the transom 6 is then introduced into the mullion 5. The first transom outside air inlet 671 corresponds to the transom outside air inlet in the claims. The lower frame 2 has a first lower frame outside air inlet 261 for introducing outside air into its interior. The outside air introduced into the lower frame 2 is then introduced into the mullion 5. The first lower frame outside air inlet 261 corresponds to the lower frame outside air inlet in the claims. When outside air is introduced into the mullion 5, the pressure inside the mullion 5 becomes equal to that of the outside air.

[0010] As shown in FIG. 4, the vertical post 5 includes a first frame member 51, a second frame member 52, a first glass support member 53, and a second glass support member 54. The first frame member 51, the second frame member 52, the first glass support member 53, and the second glass support member 54 are long members arranged in a direction extending in the vertical direction. The first glass support member 53 and the second glass support member 54 correspond to the facing material support members in the claims. The horizontal cross-sections of each of the first frame member 51, the second frame member 52, the first glass support member 53, and the second glass support member 54 are substantially the same shape throughout the vertical direction. The first frame member 51 is arranged on one side in the width direction of the second frame member 52. The first glass support member 53 is arranged on one side in the width direction of the first frame member 51. The second glass support member 54 is arranged on the other side in the width direction of the second frame member 52. The first frame member 51 and the second frame member 52 are connected. The first glass support member 53 is fixed to the first frame member 51. The second glass support member 54 is fixed to the second frame member 52.

[0011] The first frame member 51 and the second frame member 52 extend in the vertical direction throughout between the lower frame 2 and the upper frame 3. The first frame member 51 and the second frame member 52 are connected to the lower frame 2 and the upper frame 3. The first glass support member 53 and the second glass support member 54 extend in the vertical direction between the lower frame 2 and the blind 6 and between the upper frame 3 and the blind 6.

[0012] The first frame member 51 includes a first frame plate portion 511, a first outdoor plate portion 512, a first indoor plate portion 513, a first protruding portion 514, a second protruding portion 515, a first outdoor claw portion 516, and a first indoor claw portion 517. The first frame plate portion 511 is flat. The first frame plate portion 511 is arranged with its plate surface facing the width direction. One surface 511c on one side in the width direction of the first frame plate portion 511 is a flat surface.

[0013] The first outdoor plate portion 512 protrudes from the outdoor-side end portion 511a of the first frame plate portion 511 toward the other side in the width direction. A notch portion 512b is formed on the tip portion 512a of the first outdoor plate portion 512, that is, on the indoor side at the other end portion in the width direction. The proximal side of the first outdoor plate portion 512 from the notch portion 512b, that is, the indoor-side surface 512c on one side in the width direction, is a flat surface facing the indoor side. The first outdoor claw portion 516 protrudes from a position slightly more indoor than the first outdoor plate portion 512 in the first frame plate portion 511 toward the other side in the width direction. A first concave portion 518 surrounded by the first outdoor plate portion 512, the first outdoor claw portion 516, and the outdoor-side end portion of the first frame plate portion 511 is formed in the first frame member 51. The first concave portion 518 opens toward the other side in the width direction. The first indoor plate portion 513 protrudes from the indoor-side end portion 511b of the first frame plate portion 511 toward the other side in the width direction. The first indoor claw portion 517 protrudes from a position slightly more proximal than the tip portion 513a in the first indoor plate portion 513 toward the outdoor side.

[0014] The first protruding portion 514 has a first finding piece 514a and a first projecting piece 514b. The first finding piece 514a protrudes from the middle portion in the indoor-outdoor direction of the first frame plate portion 511 toward the other side in the width direction. The first projecting piece 514b protrudes from the end portion on the other side in the width direction of the first finding piece 514a toward the outdoor side. The first protruding portion 514 has an L-shaped cross-sectional shape when viewed from the vertical direction. A first convex portion 514c protruding toward the other side in the width direction is formed at the outdoor-side end portion of the first projecting piece 514b.

[0015] The second protruding portion 515 has a second finding piece 515a and a second projecting piece 515b. The second finding piece 515a protrudes from a position on the outdoor side of the first protruding portion 514 at the middle portion in the indoor-outdoor direction of the first frame plate portion 511 toward the other side in the width direction. The second projecting piece 515b protrudes from the end portion on the other side in the width direction of the second finding piece 515a toward the outdoor side. The second protruding portion 515 has an L-shaped cross-sectional shape when viewed from the vertical direction. A second convex portion 515c protruding toward the other side in the width direction is formed at the outdoor-side end portion of the second projecting piece 515b.

[0016] The second frame member 52 includes a second frame plate portion 521, a second outdoor plate portion 522, a second indoor plate portion 523, a second outdoor claw portion 524, a second indoor claw portion 525, an outdoor protruding piece 526, and an indoor protruding piece 527. The second frame plate portion 521 is flat. The second frame plate portion 521 is positioned so that its plate surface faces the width direction. The other side surface 521c of the second frame plate portion 521 in the width direction is a flat surface.

[0017] The second outdoor panel portion 522 protrudes to one side in the width direction from the outdoor end 521a of the second frame panel portion 521. The outdoor surface 522c of the second outdoor panel portion 522 is a flat surface. The second outdoor claw portion 524 protrudes to the outside from the tip 522a of the second outdoor panel portion 522, i.e., one end in the width direction. The tip 524a of the second outdoor claw portion 524, i.e., the outdoor end, is bent to the other side in the width direction. The outdoor projection piece 526 protrudes to the outside from the outdoor end 521a of the second frame panel portion 521. The outdoor projection piece 526 is located further outside than the second outdoor panel portion 522. A convex portion 526a is formed in the middle of the outdoor projection piece 526 in the indoor-outdoor direction, protruding to one side in the width direction. The convex portion 526a faces the tip 524a of the second outdoor claw portion 524 with a gap in the width direction.

[0018] An outdoor end seal material 55 is attached to the second frame member 52 along the outdoor side surface of the second outdoor panel 522. The outdoor end seal material 55 is attached over the entire vertical length of the second outdoor panel 522. The outdoor end seal material 55 has a plate-like portion 551 and two protrusions 552, 552. The plate-like portion 551 is flat. The plate-like portion 551 has its surface facing the indoor / outdoor direction and is provided along the outdoor side surface of the second outdoor panel 522. The outdoor end seal material 55 is positioned between the second outdoor claw portion 524 and the outdoor projection piece 526. One end of the outdoor end seal material 55 in the width direction is pressed from the outdoor side by the tip portion 524a of the second outdoor claw portion 524. The other end of the outdoor end seal material 55 in the width direction is pressed from the outdoor side by the convex portion 526a of the outdoor projection piece 526.

[0019] The two projections 552, 552 protrude outwards from the middle of the width direction on the outdoor side surface of the outdoor end sealing material 55. The two projections 552, 552 are spaced apart from each other in the width direction. The projection 552 located on one side in the width direction is adjacent to the other side in the width direction of the tip 524a of the second outdoor claw portion 524. The projection 552 located on the other side in the width direction is adjacent to one side in the width direction of the convex portion 526a of the outdoor projection piece 526. The tips of the two projections 552, 552, i.e., the outdoor side ends, protrude outwards more than the tip 524a of the second outdoor claw portion 524 and the convex portion 526a of the outdoor projection piece 526, and are in contact with the indoor side surface 512c of the first outdoor plate portion 512.

[0020] The second indoor panel portion 523 protrudes to one side in the width direction from the indoor end portion 521b of the second frame panel portion 521. The second indoor claw portion 525 protrudes to the indoor side from the tip portion 523a of the second indoor panel portion 523, i.e., one end in the width direction. The indoor projection piece 527 protrudes to the indoor side from the indoor end portion 521b of the second frame panel portion 521. The indoor projection piece 527 is positioned on the indoor side of the second indoor panel portion 523. The second frame member 52 has a second recess 528 formed in it, surrounded by the second indoor panel portion 523, the second indoor claw portion 525, and the indoor projection piece 527. The second recess 528 opens to the indoor side.

[0021] The first frame member 51 and the second frame member 52 are connected as follows: The first frame plate portion 511 and the second frame plate portion 521 face each other with a gap in the width direction. The second outdoor plate portion 522 is fitted into the first recess 518. The 526a of the outdoor projection piece 526 is fitted into the notch portion 512b of the first outdoor plate portion 512. The indoor side surface 512c of the first outdoor plate portion 512 and the outdoor side surface 522c of the second outdoor plate portion 522 face each other via the outdoor end seal material 55. The tips of the two projections 552, 552 of the outdoor end seal material 55 contact the indoor side surface 512c of the first outdoor plate portion 512. The first indoor claw portion 517 is fitted into the second recess 528. The other side of the first recessed piece 514b and the second recessed piece 515b in the width direction faces the one side of the second frame plate portion 521 in the width direction with a gap between them. A small gap is provided between the first protrusion 514c and the second protrusion 515c and the second frame plate portion 521. An internal sealing material 56 is provided between the first recessed piece 514b and the second frame plate portion 521. The internal sealing material 56 seals the gap between the first recessed piece 514b and the second frame plate portion 521. No sealing material is provided between the second recessed piece 515b and the second frame plate portion 521, and a gap is formed between them.

[0022] Between the first frame member 51 and the second frame member 52, three hollow sections 571, 572, and 573 are formed in the indoor-outdoor direction. The first hollow section 571, located on the outdoor side, is surrounded by the first frame plate section 511, the second frame plate section 521, the first outdoor plate section 512, the outdoor projection piece 526, and the first projection section 514. The first hollow section 571 corresponds to the outdoor hollow section in the claims. The second hollow section 572, which is an intermediate section in the indoor-outdoor direction and adjacent to the indoor side of the first hollow section 571, is surrounded by the first frame plate section 511, the second frame plate section 521, the first projection section 514, and the second projection section 515. The third hollow section 573, located on the indoor side of the second hollow section 572, is surrounded by the first frame plate section 511, the second frame plate section 521, the second protruding section 515, the first indoor plate section 513, and the indoor protruding piece 527.

[0023] As described above, no sealing material is provided between the second projection piece 515b of the second projection 515 and the second frame plate portion 521, and a gap is formed. Air and water can flow between the first hollow portion 571 and the second hollow portion 572 through the gap between the second projection piece 515b and the second frame plate portion 521. The gap between the first projection piece 514b of the first projection 514 and the second frame plate portion 521 is sealed by the internal sealing material 56. Air and water cannot flow between the second hollow portion 572 and the third hollow portion 573.

[0024] The first glass support member 53 and the second glass support member 54 have shapes that are substantially symmetrical in the width direction. In the following, the shape of the first glass support member 53 will be described, and the description of the shape of the second glass support member 54 will be omitted. When describing the second glass support member 54, the parts corresponding to the first glass support member 53 will use the same names and reference numerals as the first glass support member 53. The first glass support member 53 has a glass receiver 531 and a glazing strip 532. The glazing strip 532 is located on the outdoor side of the glass receiver 531. The glass receiver 531 has a fixing plate portion 533, an indoor plate portion 534, an outdoor protruding piece 535, and a first claw portion 536. The fixing plate portion 533 is flat. The fixing plate portion 533 is fixed to one side surface 511c in the width direction of the first frame plate portion 511 with its plate surface facing the width direction. Three protrusions 539 are formed on the other side of the fixing plate portion 533 in the width direction, at both ends and one location in the middle in both the indoor and outdoor directions. Side sealing material 57 is provided between adjacent protrusions 539 in the indoor and outdoor directions. The side sealing material 57 seals the gap between the fixing plate portion 533 and the first frame plate portion 511. The fixing plate portion 533 is fixed to the first frame plate portion 511 from one side in the width direction with screws 58.

[0025] The outdoor projection piece 535 protrudes to one side in the width direction from the outdoor end of the fixing plate portion 533. The first claw portion 536 protrudes to one side in the width direction from a position on the indoor side of the outdoor end of the fixing plate portion 533. The tip portion of the first claw portion 536, i.e., the end on one side in the width direction, is bent towards the outdoors. The glass receiver 531 has a recess 531a formed in it, surrounded by the outdoor projection piece 535, the first claw portion 536, and the portion of the fixing plate portion 533 that is on the outdoor side of the first claw portion 536. The indoor plate portion 534 protrudes to one side in the width direction from the indoor end of the fixing plate portion 533. The indoor plate portion 534 protrudes to one side in the width direction from the outdoor projection piece 535.

[0026] The trim 532 has an outdoor plate portion 537 and a second claw portion 538. The outdoor plate portion 537 is flat. The outdoor plate portion 537 is attached to the glass receiver 531 in a position where the plate surface faces in the indoor / outdoor direction. The second claw portion 538 extends diagonally from the other end of the outdoor plate portion 537 in the width direction toward the indoor side and toward the other side in the width direction, then bends and extends toward the indoor side and toward one side in the width direction. The trim 532 is fixed to the glass receiver 531 as follows. The second claw portion 538 is fitted into the recess 531a. The outdoor plate portion 537 is positioned on one side in the width direction of the outdoor projection piece 535. The first glass support member 53 has a mullion glass groove 53a formed therein, which opens on one side in the width direction, surrounded by the glass receiver 531 and the trim 532. The edge of the glass plate 7 is fitted into the mullion glass groove 53a. The indoor plate portion 534 has a claw portion 534a formed therein for securing the glass retainer 71. The outdoor plate portion 537 has a claw portion 537a formed therein for securing the glass retainer 71.

[0027] The indoor-outdoor dimensions of the first glass support member 53 and the second glass support member 54 are smaller than the indoor-outdoor dimensions of the first frame member 51 and the second frame member 52. The first glass support member 53 is fixed to the center of the first frame plate portion 511 in the indoor-outdoor direction. The portion of one side surface 511c of the first frame plate portion 511 in the width direction that is on the outdoor side of the first glass support member 53 and the outdoor side surface of the first outdoor plate portion 512 are exposed to the outdoors. The portion of one side surface 511c of the first frame plate portion 511 in the width direction that is on the indoor side of the first glass support member 53 and the indoor side surface of the first indoor plate portion 513 are exposed to the indoors.

[0028] The second glass support member 54 is fixed to the center of the second frame plate portion 521 in the indoor-outdoor direction. The portion of the other side surface 521c of the second frame plate portion 521 in the width direction that is on the outdoor side of the second glass support member 54 and the outdoor projection piece 526 are exposed to the outdoors. The portion of the other side surface of the second frame plate portion 521 in the width direction that is on the indoor side of the second glass support member 54 and the indoor projection piece 527 are exposed to the indoors. The second hollow portion 572 is positioned between the first glass support member 53 and the second glass support member 54 from the width direction. The first hollow portion 571 is positioned on the outdoor side of the first glass support member 53 and the second glass support member 54. The first hollow portion 571 is positioned on the outdoor side of the glass plate 7.

[0029] As shown in Figures 5 and 6, the fixing plate portion 533 and the first frame plate portion 511 of the first glass support member 53, which are arranged to overlap each other, have holes formed in them at positions where they overlap. The hole formed in the fixing plate portion 533 is denoted as the first mullion outside air intake hole 581. The hole formed in the first frame plate portion 511 is denoted as the second mullion outside air intake hole 582. The first mullion outside air intake hole 581 and the second mullion outside air intake hole 582 correspond to the mullion outside air intake holes in the claims.

[0030] As shown in Figures 7 and 8, the fixing plate portion 533 and the second frame plate portion 521 of the second glass support member 54, which are arranged to overlap each other, have holes formed in them at positions where they overlap. The holes formed in the second glass support member 54 and the second frame plate portion 521, which are arranged to overlap each other, will also be referred to as the first mullion outside air intake hole 581 if formed in the fixing plate portion 533, and the holes formed in the second frame plate portion 521 if formed in the second mullion outside air intake hole 582 if formed in the second mullion outside air intake hole 582. The first mullion outside air intake hole 581 and the second mullion outside air intake hole 582 correspond to the mullion outside air intake holes in the claims.

[0031] The first mullion outside air intake hole 581 of the first glass support member 53 and the second mullion outside air intake hole 582 of the first frame plate portion 511, which are arranged to overlap each other, and the first mullion outside air intake hole 581 of the second glass support member 54 and the second mullion outside air intake hole 582 of the second frame plate portion 521, which are also arranged to overlap each other, may differ in shape, indoor / outdoor direction, and vertical direction. The first mullion outside air intake hole 581 of the first glass support member 53 and the first mullion outside air intake hole 581 of the second glass support member 54 are both formed in a position that connects to the second hollow portion 572.

[0032] As shown in Figure 9, the transom 6 is composed of a single elongated member. The transom 6 is oriented to extend in the width direction. The vertical cross-section of the transom 6 perpendicular to the width direction is substantially the same shape throughout the width direction. The shape of the transom 6 is substantially symmetrical in the indoor and outdoor directions. The transom 6 has an outdoor upper plate portion 611, an indoor upper plate portion 621, an outdoor end plate portion 612, an indoor end plate portion 622, an outdoor lower plate portion 613, an indoor lower plate portion 623, a first upper groove plate portion 631, a second upper groove plate portion 632, a third upper groove plate portion 633, a first lower groove plate portion 641, a second lower groove plate portion 642, a third lower groove plate portion 643, and a middle plate portion 651.

[0033] The outdoor upper plate section 611 and the indoor upper plate section 621 are symmetrical in the indoor-outdoor direction. The outdoor upper plate section 611 and the indoor upper plate section 621 are flat plates. The outdoor upper plate section 611 and the indoor upper plate section 621 are positioned at the same height with their surfaces facing vertically. The outdoor upper plate section 611 is positioned on the outdoor side of the indoor upper plate section 621 with a gap between them. The outdoor end plate section 612 and the indoor end plate section 622 are symmetrical in the indoor-outdoor direction. The outdoor end plate section 612 and the indoor end plate section 622 are flat plates. The outdoor end plate section 612 and the indoor end plate section 622 are positioned at the same height with their surfaces facing vertically. The upper end of the outdoor end plate section 612 is connected to the outdoor end of the outdoor upper plate section 611. The upper end of the indoor end plate section 622 is connected to the indoor end of the outdoor end plate section 612.

[0034] The outdoor bottom plate section 613 and the indoor bottom plate section 623 are symmetrical in the indoor-outdoor direction. The outdoor bottom plate section 613 and the indoor bottom plate section 623 are flat plates. The outdoor bottom plate section 613 and the indoor bottom plate section 623 are positioned at the same height with their plate surfaces facing vertically. The outdoor end of the outdoor bottom plate section 613 is connected to the lower end of the outdoor end plate section 612. The indoor end of the indoor bottom plate section 623 is connected to the lower end of the indoor end plate section 622. The outdoor bottom plate section 613 is positioned on the outdoor side of the indoor bottom plate section 623 with a gap between them.

[0035] The first upper groove plate section 631 and the second upper groove plate section 632 are symmetrical in the indoor / outdoor direction. The first upper groove plate section 631 and the second upper groove plate section 632 are flat plates. The first upper groove plate section 631 and the second upper groove plate section 632 are positioned at the same height with their respective plate surfaces facing the indoor / outdoor direction. The lower end of the first upper groove plate section 631 is connected to the indoor end of the outdoor upper plate section 611. The lower end of the second upper groove plate section 632 is connected to the outdoor end of the indoor upper plate section 621. The first upper groove plate section 631 and the second upper groove plate section 632 are positioned opposite each other with a gap in the width direction. The third upper groove plate section 633 is flat. The third upper groove plate section 633 is positioned between the first upper groove plate section 631 and the second upper groove plate section 632 with its plate surface facing the vertical direction. The outdoor end of the third upper groove plate section 633 is connected from the indoor side to the vertically intermediate part of the first upper groove plate section 631. The indoor end of the third upper groove plate section 633 is connected from the outdoor side to the vertically intermediate part of the second upper groove plate section 632.

[0036] The transom 6 has an upper transom glass groove 634 that opens upward, surrounded by the upper portions of the first upper groove plate portion 631 and the second upper groove plate portion 632 above the third upper groove plate portion 633, and the third upper groove plate portion 633. The lower edge of the glass plate 7 is fitted into the upper transom glass groove 634. The first upper groove plate portion 631 has a claw portion 631a for securing the glass retainer 71. The second upper groove plate portion 632 has a claw portion 632a for securing the glass retainer 71. As shown in Figures 7 and 5, both ends of the upper transom glass groove 634 in the width direction are continuous with the lower end of the mullion glass groove 53a. Air can circulate between the inside of the upper transom glass groove 634 and the inside of the mullion glass groove 53a.

[0037] As shown in Figure 9, the first lower groove plate section 641 and the second lower groove plate section 642 are symmetrical in the indoor-outdoor direction. The first lower groove plate section 641 and the second lower groove plate section 642 are flat plates. The first lower groove plate section 641 and the second lower groove plate section 642 are positioned at the same height with their respective plate surfaces facing the indoor-outdoor direction. The upper end of the first lower groove plate section 641 is connected to the indoor end of the outdoor lower plate section 613. The upper end of the second lower groove plate section 642 is connected to the outdoor end of the indoor lower plate section 623. The first lower groove plate section 641 and the second lower groove plate section 642 are positioned opposite each other with a gap in the width direction.

[0038] The third lower groove plate section 643 is symmetrical in the indoor-outdoor direction. The third lower groove plate section 643 has an outdoor-side inclined section 643a, a horizontal section 643b, and an indoor-side inclined section 643c. The outdoor-side inclined section 643a is flat and is positioned so that its surface gradually slopes upward from the outdoor side towards the indoor side. The horizontal section 643b is flat and is positioned so that its surface is horizontal. The outdoor end of the horizontal section 643b is connected to the indoor-side and upper end of the outdoor-side inclined section 643a. The indoor-side inclined section 643c is flat and is positioned so that its surface gradually slopes downward from the outdoor side towards the indoor side. The outdoor-side and upper end of the indoor-side inclined section 643c is connected to the indoor end of the horizontal section 643b. The third lower groove plate section 643 is located between the first lower groove plate section 641 and the second lower groove plate section 642. The outdoor end of the third lower groove plate section 643 is connected from above and on the indoor side to the connection between the outdoor lower plate section 613 and the first lower groove plate section 641. The indoor end of the third lower groove plate section 643 is connected from above and on the outdoor side to the connection between the indoor lower plate section 623 and the second lower groove plate section 642.

[0039] The transom 6 has a lower transom glass groove 644 that opens downwards and is surrounded by a first lower groove plate portion 641, a second lower groove plate portion 642, and a third lower groove plate portion 643. The upper edge of the glass plate 7 is fitted into the lower transom glass groove 644. The first lower groove plate portion 641 has a claw portion 641a for securing the glass retainer 71. The second lower groove plate portion 642 has a claw portion 642a for securing the glass retainer 71. Both ends of the lower transom glass groove 644 in the width direction are continuous with the upper ends of the mullion glass groove 53a. Air can circulate between the inside of the lower transom glass groove 644 and the inside of the mullion glass groove 53a.

[0040] The intermediate plate portion 651 is flat. The intermediate plate portion 651 is positioned between the third upper groove plate portion 633 and the third lower groove plate portion 643 with its surface facing in the indoor / outdoor direction. The lower end of the intermediate plate portion 651 is connected from above to the center of the third lower groove plate portion 643 in the indoor / outdoor direction. The upper end of the intermediate plate portion 651 is connected from below to the center of the third upper groove plate portion 633 in the indoor / outdoor direction. Inside the transom 6, two hollow portions 661 and 662 are formed side by side in the indoor / outdoor direction. The first hollow section 661 on the outdoor side is surrounded by the outdoor upper plate section 611, the outdoor end plate section 612, the outdoor lower plate section 613, the portion of the first upper groove plate section 631 below the third upper groove plate section 633, the portion of the third upper groove plate section 633 that is on the outdoor side of the middle plate section 651, the portion of the third lower groove plate section 643 that is on the outdoor side of the middle plate section 651, and the middle plate section 651. The second hollow section 662 on the indoor side is surrounded by the indoor upper plate section 621, the indoor end plate section 622, the indoor lower plate section 623, the portion of the second upper groove plate section 632 below the third upper groove plate section 633, the portion of the third upper groove plate section 633 that is on the indoor side of the middle plate section 651, the portion of the third lower groove plate section 643 that is on the indoor side of the middle plate section 651, and the middle plate section 651.

[0041] As shown in Figures 9 to 10, a first transom outside air intake hole 671 is formed in the outdoor lower plate portion 613 near the indoor side, i.e., the end on the side connected to the first lower groove plate portion 641, and penetrates vertically. The first transom outside air intake hole 671 is located outdoors. A second transom outside air intake hole 672 is formed in the portion of the third upper groove plate portion 633 that is on the outdoor side of the middle plate portion 651, and penetrates vertically. Above the second transom outside air intake hole 672, a transom upper glass groove 634 is located.

[0042] As described above, outside air introduced into the transom 6 is introduced into the mullion 5. The outside air is introduced into the mullion 5 in the following way: The outside air flows into the first hollow portion 661 of the transom 6 through the first transom outside air inlet 671 shown in Figure 9. The outside air flows from the first hollow portion 661 of the transom 6 into the transom upper glass groove 634 through the second transom outside air inlet 672. The outside air flows from the transom upper glass groove 634 shown in Figures 5 and 7 into the mullion glass groove 53a which is continuous with the transom upper glass groove 634. The outside air flows from the mullion glass groove 53a into the second hollow portion 572 of the mullion 5 through the first mullion outside air inlet 581 and the second mullion outside air inlet 582. As shown in Figure 4, the second hollow section 572 of the mullion 5 is connected to the first hollow section 571, so outside air flows from the second hollow section 572 of the mullion 5 into the first hollow section 571 as well. In this way, outside air is introduced into the first hollow section 571 inside the transom 6. The transom upper glass groove 634, the mullion glass groove 53a, the first mullion outside air introduction hole 581, and the second mullion outside air introduction hole 582, which introduce outside air into the interior of the mullion 5, correspond to the outside air introduction section in the claims.

[0043] As shown in Figure 12, the lower frame 2 comprises a lower frame body 21 and a trim strip 22. The lower frame body 21 and the trim strip 22 are elongated members. The lower frame body 21 and the trim strip 22 are arranged in a direction that extends in the width direction. The vertical cross-sections of the lower frame body 21 and the trim strip 22 perpendicular to the width direction are substantially the same shape throughout the width direction. The lower frame body 21 comprises an upper plate portion 211, a first grooved plate portion 212, a second grooved plate portion 213, a first intermediate plate portion 214, a second intermediate plate portion 215, an outdoor plate portion 216, an indoor plate portion 217, a first lower plate portion 218, and a second lower plate portion 219.

[0044] The upper plate portion 211 is flat. The upper plate portion 211 is positioned so that its surface is horizontal. The upper surface of the upper plate portion 211 constitutes the upper surface on the indoor side of the lower frame body 21. The first grooved plate portion 212 is flat. The first grooved plate portion 212 is positioned so that its surface faces in the indoor / outdoor direction. The upper end of the first grooved plate portion 212 is connected to the outdoor end of the upper plate portion 211. The second grooved plate portion 213 is flat. The second grooved plate portion 213 is positioned so that its surface is horizontal. The first intermediate plate portion 214 includes a first plate portion 214a extending downward from the outdoor end of the second grooved plate portion 213, a second plate portion 214b extending outwards from the lower end of the first plate portion 214a, a third plate portion 214c extending diagonally downward toward the outdoors from the outdoor end of the second plate portion 214b, and a fourth plate portion 214d extending downward from the outdoor and lower end of the third plate portion 214c. A claw portion 214e protruding outwards is formed at the corner between the second grooved plate portion 213 and the first plate portion 214a.

[0045] The first lower plate section 218 is flat. The first lower plate section 218 is positioned so that its surface is horizontal. The outdoor end of the first lower plate section 218 is connected to the lower end of the fourth plate section 214d. The second intermediate plate section 215 is flat. The second intermediate plate section 215 is positioned so that its surface is horizontal. The indoor end of the second intermediate plate section 215 is connected from the outdoor side to the vertically intermediate part of the fourth plate section 214d. The outdoor plate section 216 is flat. The outdoor plate section 216 is positioned so that its surface faces in the indoor / outdoor direction. The outdoor plate section 216 is located on the outdoor side of the second intermediate plate section 215. The outdoor end of the second intermediate plate section 215 is connected from the indoor side to the vertically intermediate part of the outdoor plate section 216. The lower end of the outdoor plate section 216 is positioned at the same height as the lower end of the fourth plate section 214d. The upper end of the outdoor panel 216 is positioned at approximately the same height as the second grooved panel 213. The lower end of the outdoor panel 216 has a lower projection piece 216a that protrudes towards the indoor side. The lower projection piece 216a is positioned at the same height as the first lower panel 218. The upper end of the outdoor panel 216 has an upper projection piece 216b that protrudes towards the indoor side.

[0046] The indoor plate portion 217 is flat. The indoor plate portion 217 is positioned so that its surface faces in the indoor / outdoor direction. The upper end of the indoor plate portion 217 is connected to the indoor end of the upper plate portion 211. The second lower plate portion 219 is flat. The second lower plate portion 219 is positioned so that its surface is horizontal. The indoor end of the second lower plate portion 219 is connected to the lower end of the indoor plate portion 217. The first lower plate portion 218 and the second lower plate portion 219 are positioned at the same height. The first lower plate portion 218 and the second lower plate portion 219 are fixed to a fixing member 25 attached to the floor.

[0047] The trim strip 22 has a trim strip upper plate portion 221, a trim strip groove plate portion 222, and a trim strip outdoor plate portion 223. The trim strip upper plate portion 221 is flat. The trim strip upper plate portion 221 is positioned so that its surface is horizontal. The trim strip groove plate portion 222 extends downward from the indoor end of the trim strip upper plate portion 221. A claw portion 222a that protrudes indoors is formed at the lower end of the trim strip groove plate portion 222. The trim strip outdoor plate portion 223 extends downward from the outdoor end of the trim strip upper plate portion 221. A claw portion 223a that protrudes indoors and then bends downwards is formed at the lower end of the trim strip outdoor plate portion 223.

[0048] The lower frame body 21 and the trim strip 22 are fixed together as follows: The claw portion 222a at the lower end of the trim strip groove plate portion 222 is fixed to the claw portion 214e at the corner between the second groove plate portion 213 and the first plate portion 214a. The lower end portion 223a of the trim strip outdoor plate portion 223 is fixed to the upper protruding piece 216b at the upper end of the outdoor plate portion 216. The trim strip upper plate portion 221 is positioned at approximately the same height as the upper plate portion 211 of the lower frame body 21. The trim strip groove plate portion 222 faces the first groove plate portion 212 with a gap between them in the indoor / outdoor direction. The trim strip outdoor plate portion 223 is positioned continuously on top of the outdoor plate portion 216.

[0049] The lower frame 2 has a lower frame glass groove 23 that opens upward and is surrounded by a first groove plate portion 212, a second groove plate portion 213, and a glazing edge groove plate portion 222. The lower edge of the glass plate 7 is fitted into the lower frame glass groove 23. The first groove plate portion 212 has a claw portion 212a for securing the glass retainer 71. The glazing edge groove plate portion 222 has a claw portion 222b for securing the glass retainer 71. Both ends of the lower frame glass groove 23 in the width direction are continuous with the lower end of the mullion glass groove 53a. Air can circulate between the inside of the lower frame glass groove 23 and the inside of the mullion glass groove 53a.

[0050] The lower frame 2 has two hollow sections. The first hollow section 241 is surrounded by the portion of the lower frame body 21 above the second intermediate plate section 215 in the first intermediate plate section 214, the second intermediate plate section 215, the portion of the outdoor plate section 216 above the second intermediate plate section 215, the upper plate section 221 of the trim section 222, the grooved plate section 222, and the outdoor plate section 223 of the trim section 222. The other hollow section 242 is surrounded by the upper plate section 211, the first grooved plate section 212, the second grooved plate section 213, the first intermediate plate section 214, the indoor plate section 217, the first lower plate section 218, the second lower plate section 219, and the fixing member 25 of the lower frame body 21. The first hollow section 241 is located outdoors.

[0051] As shown in Figures 12 and 13, a first lower frame outside air intake hole 261 is formed in the portion of the lower frame body 211 above the second intermediate plate portion 215 in the outdoor plate portion 216, penetrating in the indoor / outdoor direction. As shown in Figures 12 and 14, a second lower frame outside air intake hole 262 is formed on the lower side of the trim groove plate portion 222 of the trim 22, penetrating in the indoor / outdoor direction. Outside air is introduced into the first hollow portion 241 inside the lower frame 2 through the first lower frame outside air intake hole 261.

[0052] As described above, outside air introduced into the lower frame 2 is introduced into the mullion 5. The outside air is introduced into the mullion 5 in the following manner: As shown in Figures 15 and 16, the outside air flows into the first hollow portion 241 of the lower frame 2 through the first lower frame outside air introduction hole 261. The outside air flows from the first hollow portion 241 of the lower frame 2 into the lower frame glass groove 23 through the second lower frame outside air introduction hole 262. Refer to Figures 12 and 14 for the second lower frame outside air introduction hole 262. The outside air flows from the lower frame glass groove 23 into the mullion glass groove 53a which is continuous with the lower frame glass groove 23. The outside air flows from the mullion glass groove 53a into the second hollow portion 572 of the mullion 5 through the first lower frame inter-mullion outside air introduction hole 583 and the second lower frame inter-mullion outside air introduction hole 584.

[0053] The first lower frame mullion-to-outside air intake hole 583 and the second lower frame mullion-to-outside air intake hole 584 are formed on the lower side of the mullion 5. The first lower frame mullion-to-outside air intake hole 583 and the second lower frame mullion-to-outside air intake hole 584 have the same configuration as the first mullion-to-outside air intake hole 581 and the second mullion-to-outside air intake hole 582 described above. The first lower frame mullion-to-outside air intake hole 583 is a hole formed in the fixing plate portion 533 of the first glass support member 53 and the fixing plate portion 533 of the second glass support member 54. The second lower frame mullion-to-outside air intake hole 584 is a hole formed in the first frame plate portion 511 of the first frame member 51 and the second frame plate portion 521 of the second frame member 52. As shown in Figure 15, the first lower frame mullion-to-outside air intake hole 583 formed in the fixing plate portion 533 of the first glass support member 53 and the second lower frame mullion-to-outside air intake hole 584 formed in the first frame plate portion 511 of the first frame member 51 overlap in the width direction. As shown in Figure 16, the first lower frame mullion-to-outside air intake hole 583 formed in the fixing plate portion 533 of the second glass support member 54 and the second lower frame mullion-to-outside air intake hole 584 formed in the second frame plate portion 521 of the second frame member 52 overlap in the width direction.

[0054] Since the second hollow section 572 of the mullion 5 is connected to the first hollow section 571, outside air also flows from the second hollow section 572 of the mullion 5 into the first hollow section 571. In this way, outside air is introduced into the first hollow section 571 inside the transom 6. The first lower frame outside air introduction hole 261, the first hollow section 241 of the lower frame 2, the second transom outside air introduction hole 672, the lower frame glass groove 23, the mullion glass groove 53a, the first lower frame inter-mullion outside air introduction hole 583, and the second lower frame inter-mullion outside air introduction hole 584, which introduce outside air into the interior of the mullion 5, correspond to the outside air introduction section in the claims.

[0055] At least the first hollow section 571 on the outdoor side inside the mullion 5 becomes the same pressure as the outside air when outside air is introduced through the outside air intake section. Therefore, rainwater from outside and humid outside air are not drawn into the first hollow section 571 on the outdoor side, preventing rainwater from entering the inside of the mullion 5.

[0056] The transom 6 has a first transom outside air inlet 671 formed therein to introduce outside air into the interior. The inside of the transom 6 becomes the same pressure as the outside air when outside air is introduced through the first transom outside air inlet 671. Therefore, rainwater from outside and humid outside air are not drawn into the interior of the transom 6, and rainwater intrusion into the interior of the transom 6 can be prevented.

[0057] Outside air is introduced into the first hollow section 571 of the mullion 5 via the transom 6. There is no need to provide holes on the outdoor side of the mullion 5 to directly introduce outside air into the interior of the mullion 5. Therefore, by providing holes in the mullion 5 for introducing outside air, it is possible to prevent rainwater from directly entering the interior of the mullion 5.

[0058] The lower frame 2 has a first lower frame outside air intake hole 261 formed therein for introducing outside air into the interior. Since the inside of the lower frame 2 is at the same pressure as the outside air, it does not draw in rainwater or humid outside air from outside, thus preventing rainwater from entering the interior of the lower frame 2.

[0059] Outside air can be introduced into the first hollow section 571 of the mullion 5 via the lower frame 2. There is no need to provide holes on the outdoor side of the mullion 5 to directly introduce outside air into the inside of the lower frame 2. Therefore, by providing holes in the mullion 5 for introducing outside air, it is possible to prevent rainwater from directly entering the inside of the mullion 5.

[0060] An outdoor end seal material 55 is provided between the first outdoor panel portion 512 of the first frame member 51 and the second outdoor panel portion 522 of the second frame member 52. The outdoor end seal material 55 prevents rainwater from entering the interior of the mullion 5 through the gap between the first outdoor panel portion 512 of the first frame member 51 and the second outdoor panel portion 522 of the second frame member 52. Because the outdoor end seal material 55 is provided, airtightness can be ensured even when outdoor wind pressure acts on the mullion 5. For this reason, airtightness can be ensured even if the width dimension of the mullion 5 is reduced in order to improve the design of the mullion 5.

[0061] Even if the inside of the mullion 5 becomes the same pressure as the outside air and the first outdoor panel portion 512 of the first frame member 51 and the second outdoor panel portion 522 of the second frame member 52 are displaced in a direction that separates them, the projection 552 of the outdoor end seal material 55 will come into contact with the indoor side surface 512c of the first outdoor panel portion 512 of the first frame member 51, preventing a gap from forming between the outdoor end seal material and the indoor side surface of the outdoor end of one of the frame members. Therefore, it is possible to prevent rainwater from entering the inside of the mullion 5 from between the first outdoor panel portion 512 of the first frame member 51 and the second outdoor panel portion 522 of the second frame member 52.

[0062] The outdoor end sealing material 55 has two projections 552. Even if the first outdoor panel 512 of the first frame member 51 and the second outdoor panel 522 of the second frame member 52 are misaligned, one of the two projections 552 will contact the indoor side surface 512c of the first outdoor panel 512 of the first frame member 51. This prevents rainwater from entering the interior of the mullion 5 from between the first outdoor panel 512 of the first frame member 51 and the second outdoor panel 522 of the second frame member 52.

[0063] The internal sealing material 56 seals the gap between the first protrusion 514 of the first frame member 51 and the second frame plate portion 521 of the second frame member 52, so that even if rainwater enters the interior of the lower frame 2, it is possible to prevent rainwater from entering the interior beyond the first protrusion 514. Because the position where the first frame member 51 and the second frame member 52 are screwed together is close to the position where the internal sealing material 56 is provided, the internal sealing material 56 can be brought into contact with both the first protrusion 514 of the first frame member 51 and the second frame plate portion 521 of the second frame member 52, thereby stabilizing the watertightness of the mullion 5.

[0064] Since the first frame member 51 and the second frame member 52 are separate components from the first glass support member 53 and the second glass support member 54, there is no need to provide grooves for supporting the glass plate 7, and the width dimension can be reduced. Side sealing material 57 is provided between the first frame member 51 and the first glass support member 53, and between the second frame member 52 and the second glass support member 54. The side sealing material 57 can prevent rainwater from entering the room through the gaps between the first frame member 51 and the first glass support member 53, and between the second frame member 52 and the second glass support member 54.

[0065] This disclosure is not limited to the embodiments described above and can be modified as appropriate. For example, an air intake hole may be provided in the mullion 5 for introducing outside air. The route for introducing outside air into the mullion 5 may be other than those described above. There may be one or more routes for introducing outside air into the mullion 5. The number of hollow sections provided in the mullion 5 may be two or four or more. It is sufficient to introduce outside air into at least the hollow section on the outdoor side of the multiple hollow sections provided in the mullion 5. The facing material supported by the mullion 5 and the transom 6 may be other than the glass plate 7.

[0066] An outdoor end seal material 55 is not required between the first outdoor panel portion 512 of the first frame member 51 and the second outdoor panel portion 522 of the second frame member 52. The form of the outdoor end seal material 55 may be other than that described above. An internal seal material 56 is not required between the first protrusion 514 of the first frame member 51 and the second frame panel portion 521 of the second frame member 52. The number and form of the internal seal material 56 may be other than that described above. A side seal material 57 is not required between the first frame member 51 and the first glass support member 53, and between the second frame member 52 and the second glass support member 54. The form of the side seal material 57 may be other than that described above. The first frame member 51 is not required to have the first protrusion 514 and the second protrusion 515. Instead of the first frame member 51, the second frame member 52 may be provided with a protrusion that projects toward the first frame member 51. [Explanation of symbols]

[0067] 1 Sash, 2 Bottom frame, 3 Top frame, 4 Vertical frame, 5 Mullion, 6 Transom, 7 Glass plate, 51 First frame member, 52 Second frame member, 53 First glass support member, 54 Second glass support member, 55 Outdoor end sealant, 56 Internal sealant, 57 Side sealant, 58 Screw, 241 First hollow section, 242 Second hollow section, 261 First bottom frame outside air intake hole, 262 Second bottom frame outside air intake hole, 514 First protrusion, 515 Second protrusion, 571 First hollow section, 572 Second hollow section, 573 Third hollow section, 581 First mullion outside air intake hole, 582 Second mullion outside air intake hole, 583 First bottom frame between mullions outside air intake hole, 584 Second bottom frame between mullions outside air intake hole, 671 First mullion-type outside air inlet, 672 Second mullion-type outside air inlet

Claims

1. A mullion that extends vertically to support the panel material, It has a lower frame that extends horizontally and to which the lower end of the mullion is connected, Inside the aforementioned mullion, there are provided two or more hollow sections arranged at different positions in the indoor / outdoor direction. The aforementioned hollow portion is equipped with an outside air introduction section for introducing outside air into the outdoor-side hollow portion, which is at least located on the outdoor side of the hollow portion. The lower frame has an air intake hole for introducing outside air into the interior. The aforementioned outside air intake section is a sash structure formed in the mullion and having an outside air intake hole between the lower frame mullions that introduces outside air introduced into the interior of the lower frame into the hollow section on the outdoor side.

2. It has a transom that extends horizontally and is connected to the vertical intermediate portion of the mullion, The aforementioned transom has transom air intake holes for introducing outside air into the interior. The sash structure according to claim 1, wherein the outside air introduction portion is formed in the mullion and has a mullion outside air introduction hole for introducing outside air introduced into the interior of the transom into the outdoor side hollow portion.

3. The aforementioned mullion is, The hollow portion has a pair of frame members arranged on one side and the other side in the width direction, The pair of frame members are connected at their respective outdoor ends and at their respective indoor ends. The sash structure according to claim 1 or 2, wherein an outdoor end sealing material is provided between the outdoor ends of each of the pair of frame members.

4. The outdoor end of one of the pair of frame members overlaps the outdoor end of the other frame member via the outdoor end sealing material. The aforementioned outdoor end sealing material is A plate-shaped portion that contacts the outdoor-facing surface of the outdoor-facing end of the other frame member, The sash structure according to claim 3, wherein a projection is formed that protrudes from the plate-like portion toward the outdoors and contacts the indoor surface of the outdoor end of one of the frame members.

5. The sash structure according to claim 4, wherein the aforementioned protrusions are formed in multiple locations with spacing in the width direction.

6. The aforementioned mullion is, The hollow portion has a pair of frame members arranged on one side and the other side in the width direction, The pair of frame members are connected at their respective outdoor ends and at their respective indoor ends. One of the pair of frame members has a projection that extends from its intermediate portion in the indoor / outdoor direction toward the other frame member and is screwed to the other frame member. The sash structure according to claim 1 or 2, wherein an internal sealing material is provided between the protruding portion and the other frame member.

7. The aforementioned mullion is, A pair of frame members are arranged on one side and the other side in the width direction of the hollow portion, The frame member comprises a pair of surface material support members fixed to one and the other side in the width direction of the pair of frame members and supporting the surface material, The pair of frame members are connected at their respective outdoor ends and at their respective indoor ends. The sash structure according to claim 1 or 2, wherein a side sealing material is provided between the frame member and the surface material support member.

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