JP7690382B2 - Curtain Wall - Google Patents

Description

The present invention relates to curtain walls that form the exterior surface of a building.

A modular curtain wall is known in which factory-produced units are lined up vertically and horizontally and attached to the building structure, and the horizontal frames and vertical frames of adjacent units are airtightly joined together by a concave-convex fit (see Patent Document 1).
In this curtain wall, two units are arranged on the left and right, and of the left and right vertical frames arranged opposite each other, one vertical frame is the receiving side (female side) and the other vertical frame is the inserting side (male side). The receiving side vertical frame is formed with a pair of receiving extension fins with a tie material at the tip, and the inserting side vertical frame is formed with a pair of inserting extension fins. The upper frame is attached horizontally to the left and right vertical frames.
In such curtain walls, the cross-sectional shapes of the left and right vertical frames are formed to be almost symmetrical so that the cross-sectional shapes of the ends of the upper frame are symmetrical. In other words, the base end side of the insertion protruding fin is configured so that the position in the projection direction and the protruding dimension in the left and right direction are the same as those of the receiving protruding fin, and the tip side of the insertion protruding fin is formed in a crank shape and arranged between the receiving protruding fins. Therefore, the tip position of the receiving protruding fin in the left and right direction of the unit, that is, the arrangement position of the tension material, is located on the receiving vertical frame side rather than the center position of the joint between the left and right vertical frames.

JP 2001-303703 A

Curtain walls are required to be able to follow inter-story displacements during earthquakes and strong winds, so a gap must be provided between the tip of the fin of one vertical frame and the other vertical frame so that the units do not come into contact with each other when they are displaced left or right. This makes it difficult to make the joints between the vertical frames smaller.

The objective of the present invention is to provide a modular curtain wall that can reduce the width of the vertical joints between units while ensuring watertightness.

The curtain wall of the present invention is a curtain wall constructed by arranging curtain wall units in the left-right and up-down directions, and the curtain wall unit is constructed with a frame body having an upper frame, a lower frame, a first vertical frame, and a second vertical frame, and the first vertical frame of one of two curtain wall units arranged on the left and right is arranged opposite to the second vertical frame of the other curtain wall unit in the left-right direction, the first vertical frame has a first main body part along the projection direction, and a first exterior protruding piece and a first interior protruding piece that protrude from the projection surface of the first main body part to the second vertical frame side, and the second vertical frame has a second main body part along the projection direction, a second exterior protruding piece that protrudes from the projection surface of the second main body part to the first vertical frame side and is arranged on the outside of the first exterior protruding piece, and a projection surface of the second main body part. and a second indoor protruding piece that protrudes from the first vertical frame side and is positioned on the indoor side of the first indoor protruding piece, a tight material that abuts against the first outdoor protruding piece is attached to the second outdoor protruding piece, and a tight material that abuts against the second indoor protruding piece is attached to the second indoor protruding piece, the protruding dimension of the second outdoor protruding piece and the second indoor protruding piece is a dimension that is equal to or greater than half the distance between the first main body part and the second main body part, and the end of the upper frame of the other curtain wall unit on the second vertical frame side is equipped with an indoor side upper surface covering part that covers at least the space between the upper surfaces of the second outdoor protruding piece and the second indoor protruding piece, and an outdoor side upper surface covering part that is provided on the outdoor side of the indoor side upper surface covering part and covers the upper surface of the second main body part, and the indoor side upper surface covering part protrudes toward the first main body part more than the outdoor side upper surface covering part.

According to the curtain wall of the present invention, the space between the upper surfaces of the second exterior protruding piece and the second interior protruding piece is covered by the interior upper surface covering portion provided at the end portion of the upper frame of the other curtain wall unit on the second vertical frame side, so that the waterproofing materials provided on the second exterior protruding piece and the second interior protruding piece are not exposed, thereby improving water-stopping properties.
In addition, since the protruding dimensions of the second exterior protruding piece and the second interior protruding piece are set to more than half the spacing dimension between the first main body portion and the second main body portion, each tension material can be provided at the widthwise center position of the joint, thereby reducing the width dimension of the vertical joint between units while ensuring a gap for interlayer displacement.

FIG. 1 is an external view showing a curtain wall according to an embodiment of the present invention. 2 is a cross-sectional plan view taken along line AA in FIG. 1. 2 is a longitudinal cross-sectional view taken along line BB in FIG. 1. 2 is a longitudinal cross-sectional view taken along line CC of FIG. 1. A vertical cross-sectional view showing the upper and lower frames of a curtain wall unit. A vertical cross-sectional view showing the upper and lower frames of a curtain wall unit. A cross-sectional plan view showing the first vertical frame and the second vertical frame of the curtain wall unit. FIG. 2 is an exploded perspective view showing a main part of the curtain wall. FIG. 2 is a plan view showing a main part of the curtain wall. FIG. 2 is a perspective view showing a main part of a curtain wall. FIG. 13 is a plan view showing a main part of a modified curtain wall.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in Figures 1 and 2, the curtain wall 1 of this embodiment constitutes the exterior wall surface of a building 2 such as a building. As also shown in Figures 2 to 4, the building 2 includes columns 3, beams 4 fixed between the columns 3, and a floor slab 5 supported by the beams 4. A suspended ceiling 6 is installed below the floor slab 5, and a floor 7 is installed above the floor slab 5. As shown in Figure 1, the curtain wall 1 is configured by arranging two types of curtain wall units 10A and 10B alternately side by side vertically and horizontally, and separates the indoors and outdoors of the building 2.
In the following description, the left-right direction of the curtain wall 1 is defined as the X-axis direction, the indoor-outdoor direction (view direction) of the curtain wall 1 is defined as the Y-axis direction, and the vertical direction (up-down direction) is defined as the Z-axis direction. The X, Y, and Z axis directions are perpendicular to each other.

As shown in Figures 1 and 3, the curtain wall unit 10A comprises a frame body 11A having an upper frame 20A, a lower frame 30A, a first vertical frame 40 on the left and right, and a second vertical frame 50 formed from an aluminum extrusion profile, a panel holding frame material 60 attached to the inner surfaces of the first vertical frame 40 and the second vertical frame 50, respectively, and a panel 70.
As shown in Figures 1 and 4, the curtain wall unit 10B comprises a frame body 11B having an upper frame 20B, a lower frame 30B, and left and right first and second vertical frames 40 and 50 formed from extruded aluminum profiles, a panel holding frame material 60 attached to the inner surfaces of the first vertical frame 40 and the second vertical frame 50, respectively, and a panel 70.
As also shown in Figures 5 to 7, panel 70 is composed of a double-glazed panel, and the upper and lower edges of panel 70 are held by upper frames 20A, 20B and lower frames 30A, 30B, and both left and right end edges of panel 70 are held by surface material holding frame material 60.

The exterior wall surface formed by the curtain wall 1 of this embodiment is generally inclined outwardly toward the upper floors as shown in Figures 3 and 4. Furthermore, the facade of the building 2 is designed such that the panels 70 are bent in the direction of entrance and exit.
In this embodiment, the upper frame 20A has a projected dimension that is approximately half that of the first vertical frame 40 and the second vertical frame 50, while the upper frame 20B has a projected dimension that is approximately equal to that of each of the vertical frames 40, 50. The lower frame 30A has a projected dimension that is approximately equal to that of each of the vertical frames 40, 50, while the lower frame 30B has a projected dimension that is approximately half that of each of the vertical frames 40, 50.
For this reason, as shown in Figure 3, in the curtain wall unit 10A, the projected dimension of the lower frame 30A is larger than the projected dimension of the upper frame 20A, and the inclination angle of the panel 70 relative to the vertical direction is smaller than the inclination angle of the exterior surfaces of the first vertical frame 40 and the second vertical frame 50.
Also, as shown in Figure 4, in the curtain wall unit 10B, the projected dimension of the lower frame 30B is smaller than the projected dimension of the upper frame 20B, and the inclination angle of the panel 70 relative to the vertical direction is larger than the inclination angle of the exterior surfaces of the first vertical frame 40 and the second vertical frame 50.
2, in the left-right direction, the upper end side of the panel 70 of the curtain wall unit 10A is located closer to the indoor side than the upper end side of the panel 70 of the curtain wall unit 10B. On the other hand, the lower end side of the panel 70 of the curtain wall unit 10A is located closer to the outdoor side than the lower end side of the panel 70 of the curtain wall unit 10B.
Therefore, the facade of the building 2 is designed in such a way that the panels 70 are not arranged on the same plane in the vertical and horizontal directions, but are bent in the direction of entry and exit, i.e., the prospective direction.
The fixing structure of the curtain wall units 10A, 10B to the building structure is a typical fixing structure in which the upper ends of each vertical frame 40, 50 are fixed to beams 4 via fasteners 8, brackets 9, etc., so explanation is omitted.

[Top border]
Next, the upper frames 20A, 20B of the curtain wall units 10A, 10B will be described with reference to Figures 5 and 6.
As shown in Figure 5, the upper frame 20A of the curtain wall unit 10A comprises an upper frame main body 21A, an exterior protrusion 22A and an interior protrusion 23A protruding from the upper frame main body 21A, an extension piece 24A extending to the outside of the room from the upper frame main body 21A, and a panel retaining piece 25A extending downward from the exterior end of the extension piece 24A.
The upper frame body 21A is formed hollow by an upper surface 211A, a lower surface 212A, an exterior surface 213A, and an interior surface 214A. A step is formed on the interior side of the lower surface 212A, and a fireproof board 80 is held on this step by a metal fitting 81 having an L-shaped cross section that is screwed to the upper frame body 21A.
A plurality of screw holes are formed in the hollow portion of the upper frame body 21A. The left and right end faces of these screw holes abut against the side faces of the first vertical frame 40 and the second vertical frame 50, and the upper frame 20A is connected to the first vertical frame 40 and the second vertical frame 50 with screws that are screwed into the screw holes from the first vertical frame 40 and the second vertical frame 50.
Glazing gaskets 216, 217 are fixed to the exterior surface 213A and the panel holding piece 25A, respectively, and the panel 70, which is a double-glazed glass, is held between these glazing gaskets 216, 217. The exterior surface 213A and the panel holding piece 25A are inclined with respect to the vertical direction in accordance with the inclination angle of the panel 70 arranged in the curtain wall unit 10A.

A rain barrier 26 made of weatherstripe material is attached to the interior surface of the upper end of the exterior protrusion 22A, and a wind barrier 27 made of weatherstripe material is attached to the exterior surface of the upper end of the interior protrusion 23A.
Further, end members 28 are attached to the groove defined by upper surface 211A, exterior protrusion 22A, and interior protrusion 23A. End members 28 are short aluminum extrusions having a generally U-shaped cross section, and are disposed at both the left and right ends of the groove, one at each, and secured to upper surface 211A with screws.

As shown in Figure 6, the upper frame 20B of the curtain wall unit 10B comprises an upper frame main body 21B, an exterior protrusion 22B and an interior protrusion 23B protruding from the upper frame main body 21B, an extension piece 24B extending to the outside of the room from the upper frame main body 21B, and a panel retaining piece 25B extending downward from the exterior end of the extension piece 24B.
The upper frame body 21B has three hollow spaces formed by an upper surface 211B, a lower surface 212B, an exterior surface 213B, an interior surface 214B, and two partition pieces 215B. A step is formed on the interior side of the lower surface 212B, similar to the upper frame 20B, and a fireproof board 80 is held by a metal fitting 81.
A plurality of screw holes are formed in the hollow portion of the upper frame body 21B. The left and right end faces of these screw holes abut against the side faces of the first vertical frame 40 and the second vertical frame 50, and the upper frame 20B is connected to the first vertical frame 40 and the second vertical frame 50 with screws that are screwed into the screw holes from the first vertical frame 40 and the second vertical frame 50.
Glazing gaskets 216, 217 that hold the panel 70 are attached to the exterior surface 213B and the panel holding piece 25B. Note that the exterior surface 213B and the panel holding piece 25B are inclined with respect to the vertical direction in accordance with the inclination angle of the panel 70 arranged in the curtain wall unit 10B.

A rain barrier 26 and a wind barrier 27 are attached to the exterior ridge 22B and the interior ridge 23B. End members 28 are attached to both the left and right ends of the groove defined by the upper surface 211B, the exterior ridge 22B, and the interior ridge 23B.

[Bottom frame]
Next, the lower frames 30A, 30B of the curtain wall units 10A, 10B will be described with reference to Figures 5 and 6.
As shown in Figure 6, the lower frame 30A comprises a lower frame main body 31A, a ridge 32, and a ventilation device 35.
The lower frame main body 31A is formed with multiple hollow portions, and is fixed to the sides of the first vertical frame 40 and the second vertical frame 50 by screwing screws from the first vertical frame 40 and the second vertical frame 50 into screw holes formed in these hollow portions.
The lower frame body 31A also has a hollow insertion portion 311A that is inserted between the exterior ridges 22B and the interior ridges 23B of the upper frame 20B. The insertion portion 311A has abutment surfaces against which the rain barrier 26 and the wind barrier 27 abut, thereby ensuring watertightness between the lower frame 30A and the upper frame 20B.

The ridge 32 is removably attached to the exterior end of the lower frame body 31A. A glazing gasket 217 is attached to the ridge 32, and an internal spacer 218 is attached to the exterior surface of the lower frame body 31A, with the panel 70 being held in place by the glazing gasket 216 and the internal spacer 218. In addition, a sealant 219 is filled on the upper side of the internal spacer 218, sealing the gap between the panel 70 and the lower frame body 31A.

The ventilation device 35 includes a ventilation lid 351 that is attached to the lower frame body 31A so as to be able to open and close. The lower frame 30A is formed with ventilation openings 352, 353. When the ventilation lid 351 is opened, outside air can be introduced into the room through the path 355 shown in FIG. 6, and when the ventilation lid 351 is closed, the path 355 is blocked, blocking the introduction of outside air.

5, the lower frame 30B includes a lower frame body 31B and a rib 32. Since the lower frame 30B has a smaller projected dimension than the lower frame 30A, a ventilation device is not provided.
The lower frame main body 31B is formed with two hollow portions, and is fixed to the sides of the first vertical frame 40 and the second vertical frame 50 by screwing screws from the first vertical frame 40 and the second vertical frame 50 into screw holes formed in these hollow portions.
The lower frame body 31B also has a hollow insertion portion 311B that is inserted between the exterior ridges 22A and the interior ridges 23A of the upper frame 20A. The insertion portion 311B abuts against the rain barrier 26 and the wind barrier 27, thereby ensuring watertightness between the lower frame 30B and the upper frame 20A.

The ridge 32 is removably attached to the exterior end of the lower frame body 31B. A glazing gasket 217 is attached to the ridge 32, and an internal spacer 218 is attached to the exterior surface of the lower frame body 31B, with the glazing gasket 217 and the internal spacer 218 holding the panel 70. In addition, a sealant 219 is filled on the upper side of the internal spacer 218, sealing the gap between the panel 70 and the lower frame body 31B.

[First vertical frame]
As shown in Figures 7 and 8, the first vertical frame 40 has the same configuration in curtain wall units 10A, 10B, and comprises a first main body portion 41 along the projection direction, and a first exterior protruding piece 42 and a first interior protruding piece 43 which protrude from the outer peripheral surface 411 of the first main body portion 41 toward the second vertical frame 50.
The first main body 41 is composed of a plate-like member formed in a straight line along the projection direction (Y-axis direction), and the inner peripheral surface 412 of the first main body 41 is a flat plane. The outer peripheral surface 411 and the inner peripheral surface 412 are surfaces along the projection direction of the first main body 41, the outer peripheral surface 411 is a surface along the joint with other curtain wall units 10A, 10B arranged in the left-right direction, and the inner peripheral surface 412 is the inside of the frame bodies 11A, 11B, that is, the surface on the side where the panel 70 is arranged. The same is true for the second vertical frame 50.
An exterior protrusion 44 and an interior protrusion 45 that protrude toward the second vertical frame 50 are formed on the exterior end and interior end of the outer surface 411 of the first vertical frame 40, and joint retaining pieces 46, 47 are formed on the interior side of the exterior protrusion 44.

[Second vertical frame]
As shown in Figure 7, the second vertical frame 50 has the same configuration in curtain wall units 10A and 10B, and comprises a second main body portion 51 along the projection direction, and a second exterior protruding piece 52 and a second interior protruding piece 53 which protrude from the outer peripheral surface 511 of the second main body portion 51 toward the first vertical frame 40.
The second main body portion 51 is composed of a plate-like member formed in a straight line along the projection direction (Y-axis direction), and the inner circumferential surface 512 of the second main body portion 51 is a flat surface.
The exterior and interior ends of the outer surface 511 of the second vertical frame 50 are formed with an exterior protrusion piece 54 and an interior protrusion piece 55 that protrude toward the first vertical frame 40, and joint retaining pieces 56, 57 are formed on the interior side of the exterior protrusion piece 54.

A rain barrier 521 made of weatherstripping material is attached to the inside of the vehicle at the tip of the second exterior protruding piece 52, and a wind barrier 531 made of weatherstripping material is attached to the outside of the vehicle at the tip of the second interior protruding piece 53.
In this embodiment, the protruding dimension L1 in the X-axis direction of the second exterior protruding piece 52 and the second interior protruding piece 53 is set to be equal to or more than half the dimension between the first main body portion 41 and the second main body portion 51, i.e., half of the width dimension L (dimension in the X-axis direction) of the joint between the first vertical frame 40 and the second vertical frame 50. Specifically, the protruding dimensions of the second exterior protruding piece 52 and the second interior protruding piece 53 are set so that the left-right positions (X-axis direction) of the rain barrier 521 and the wind barrier 531 are on the center line CL of the joint.
The first exterior protruding piece 42 and the first interior protruding piece 43 of the first vertical frame 40 are formed linearly along the X-axis direction in a plan view, and their protruding dimension L2 is longer than L/2, and in this embodiment, is longer than L1. Therefore, L>L2>L1>L/2.
The first exterior protruding piece 42 and the first interior protruding piece 43 are inserted between the second exterior protruding piece 52 and the second interior protruding piece 53, and abut against the rain barrier 521 and the wind barrier 531. As a result, the curtain wall 1 is an open joint construction curtain wall having a space between the rain barrier 521 and the wind barrier 531 that is equal in pressure to the outside air pressure.

In the joints between the first vertical frame 40 and the second vertical frame 50, the areas between the exterior projections 44, 54 and the joint retaining pieces 46, 56 are used as rails to guide the gondola guide. In addition, joint materials that join the curtain wall units 10A and 10B are attached between the joint retaining pieces 46, 47, 56, 57.

As shown in Figures 5 and 8, the extension piece 24A of the upper frame 20A is lower in height than the upper surface 211A of the upper frame 20A, and is also lower in height than the upper surface 211B of the upper frame 20B. Therefore, as shown in Figure 8, the upper end surfaces of the second vertical frame 50 and the first vertical frame 40 to which the upper frame 20A is attached are one step lower at the position corresponding to the extension piece 24A.

[Frame material for holding surface material]
A panel holding frame material 60 that holds the left and right edges of the panel 70 is fixed to the inner surfaces 412, 512 of the first vertical frame 40 and the second vertical frame 50.
In the curtain wall unit 10A, the face material holding frame 60 is inclined so that its upper end is closer to the exterior than its lower end, in order to hold the left and right edges of the panel 70 held between the upper frame 20A and the lower frame 30A, as shown in Fig. 3. Specifically, the position of the upper end of the face material holding frame 60 in the Y-axis direction corresponds to the panel holding piece 25A and the exterior surface 213A of the upper frame 20A, as shown in Fig. 5. The position of the lower end of the face material holding frame 60 in the Y-axis direction corresponds to the exterior surface of the lower frame body 31A and the ridge 32, as shown in Fig. 6.
In the curtain wall unit 10B, the face material holding frame 60 is inclined so that its upper end is closer to the interior side than its lower end, in order to hold the left and right edges of the panel 70 held between the upper frame 20B and the lower frame 30B, as shown in Fig. 4. Specifically, the position of the upper end of the face material holding frame 60 in the Y-axis direction corresponds to the panel holding piece 25B and the exterior surface 213B of the upper frame 20B, as shown in Fig. 6. The position of the lower end of the face material holding frame 60 in the Y-axis direction corresponds to the exterior surface of the lower frame body 31B and the ridge 32, as shown in Fig. 5.

As shown in Fig. 7, the surface material holding frame 60 includes a frame body 61 and a batten 62. Since Fig. 7 is a plan cross-sectional view of the curtain wall units 10A and 10B at a position close to the upper end, in the curtain wall unit 10A, the surface material holding frame 60 and the panel 70 are disposed at a middle position in the projection direction of the first main body 41 and the second main body 51, specifically, at a position close to the first exterior protruding piece 42 and the second exterior protruding piece 52. In addition, in the curtain wall unit 10B, the surface material holding frame 60 and the panel 70 are disposed on the tip side of the first main body 41 and the second main body 51. In this respect, it differs from Fig. 2, which is a plan cross-sectional view of the curtain wall units 10A and 10B at a position close to the lower end.
The frame main body 61 is a long member with an approximately L-shaped cross-section, which includes a fixing piece 611 fixed to the first main body portion 41 and the second main body portion 51 with a hexagonal bolt and screw, and a hollow retaining piece portion 612 formed continuously with the indoor side of the fixing piece 611.
The ridge 62 is a long member with a generally L-shaped cross section that is detachably attached to the fixing piece 611. A glazing gasket 63 is attached to the ridge 62, and an internal spacer 64 is attached to the holding piece 612. The panel 70 is held between the glazing gasket 63 and the internal spacer 64. A sealant 65 is filled inside the internal spacer 64.

[Fit of upper frame and vertical frame joints]
The upper frames 20A, 20B are fixed to the upper end portions of the inner surfaces 412, 512 of the first vertical frame 40 and the second vertical frame 50, and the upper surfaces 211A, 211B of the upper frames 20A, 20B and the left and right ends of the extension pieces 24A, 24B are extended so as to cover the upper ends of the first vertical frame 40 and the second vertical frame 50.
That is, as shown in Fig. 9, the end portions of the upper frames 20A, 20B on the second vertical frame 50 side include outdoor upper surface covering portions 221A, 221B that are positioned on the outdoor side of the second outdoor protruding piece 52 and cover the upper surface of the second main body portion 51, and indoor upper surface covering portions 222A, 222B that cover the space between the upper surfaces of the second outdoor protruding piece 52 and the second indoor protruding piece 53. For this reason, the indoor upper surface covering portions 222A, 222B are formed to protrude toward the first main body portion 41 further than the outdoor upper surface covering portions 221A, 221B.
Therefore, the indoor side upper surface covering parts 222A, 222B cover at least the area between the upper surfaces of the second outdoor protruding piece 52 and the second indoor protruding piece 53, and the outdoor side upper surface covering parts 221A, 221B are provided on the outdoor side of the indoor side upper surface covering parts 222A, 222B and cover the upper surface of the second main body part 51. The indoor side upper surface covering parts 222A, 222B protrude closer to the first main body part 41 than the outdoor side upper surface covering parts 221A, 221B.
In the upper frames 20A, 20B, the protruding dimension (dimension in the X-axis direction) and the projected dimension (dimension in the Y-axis direction) of the indoor side upper surface covering parts 222A, 222B are the same, but the projected dimensions of the outdoor side upper surface covering parts 221A, 221B differ because they correspond to the projected dimensions of the upper frames 20A, 20B. That is, the outdoor side upper surface covering part 221B is provided up to a position near the outdoor side end of the second vertical frame 50. On the other hand, the outdoor side upper surface covering part 221A is provided up to a midpoint in the projected direction of the second vertical frame 50. For this reason, the upper surface of the second main body part 51 is exposed on the outdoor side of the outdoor side upper surface covering part 221A.

The end portions of the upper frames 20A, 20B facing the first vertical frame 40 are provided with outdoor side upper surface covering portions 231A, 231B which are positioned opposite the outdoor side upper surface covering portions 221A, 221B and cover the upper surface of the first main body portion 41 of the first vertical frame 40, and outdoor side upper surface covering portions 232A, 232B which are positioned opposite the indoor side upper surface covering portions 222A, 222B and cover the upper surface of the first main body portion 41.
In this embodiment, the indoor side upper surface covering portions 232A, 232B protrude slightly toward the indoor side upper surface covering portions 222A, 222B further than the outdoor side upper surface covering portions 231A, 231B, and cover the base end portions of the first outdoor protruding piece 42 and the first indoor protruding piece 43.
In addition, the protrusion dimensions and projection dimensions of the indoor side upper surface covering portions 232A, 232B are identical to each other, and the projection dimensions are also identical to those of the indoor side upper surface covering portions 222A, 222B.
Similarly to the outdoor side upper surface covering portion 221B, the outdoor side upper surface covering portion 231B is provided up to a position close to the outdoor side end of the first vertical frame 40. On the other hand, the outdoor side upper surface covering portion 231A is provided up to a middle position in the projection direction of the first vertical frame 40, and the upper surface of the first main body portion 41 is exposed on the outdoor side of the outdoor side upper surface covering portion 231A.

As described above, the upper frames 20A and 20B are abutted against the side surfaces of the first vertical frame 40 and the second vertical frame 50 and screwed in place, except for the upper surfaces 211A, 211B and the extension pieces 24A, 24B, but the left and right ends of the upper surfaces 211A, 211B and the extension pieces 24A, 24B, i.e., the outdoor upper surface covering portions 221A, 221B, 231A, 231B and the indoor upper surface covering portions 222A, 222B, 232A, 232B, extend out so as to cover the upper surfaces of the first vertical frame 40 and the second vertical frame 50.
In addition, the edges of the outdoor upper surface covering parts 221A, 221B, 231A, and 231B are aligned with the outer peripheral surfaces 411 and 511 of the first main body part 41 and the second main body part 51, and are located equidistant from the center line CL in the left-right direction (X-axis direction) of the joint between the first vertical frame 40 and the second vertical frame 50.

[Catch pan]
As shown in Fig. 10, catch pans that close the joints are arranged in the joints between the first vertical frame 40 and the second vertical frame 50. The catch pans are made of silicone sponge or the like, and include a catch pan 91 arranged at the ends of the exterior protrusions 22A, 22B and the interior protrusions 23A, 23B of the upper frames 20A, 20B on the first vertical frame 40 side, a catch pan 92 arranged at the ends of the exterior protrusions 22A, 22B and the interior protrusions 23A, 23B on the second vertical frame 50 side, a catch pan 93 arranged on the exterior side of the catch pan 91, and a catch pan 94 arranged on the exterior side of the catch pan 92. These catch pans 91 to 94 close the joints between the upper ends of the first vertical frame 40 and the second vertical frame 50 and between the small ends of the exterior protrusions 22A, 22B and the interior protrusions 23A, 23B of the upper frames 20A, 20B. As a result, the rain barrier 521 and wind barrier 531 provided on the first vertical frame 40 and the second vertical frame 50 and the rain barrier 26 and wind barrier 27 provided on the upper frames 20A and 20B form a continuous tight line via the catch pans 91 and 92.
In addition, on the outdoor side of the catch pans 93, 94, a joint sleeve 95 that connects the upper and lower curtain wall units 10A, 10B is arranged between the joint retaining pieces 46, 47, 56, 57.

[Effects of the embodiment]
According to this embodiment, the upper frames 20A, 20B of each curtain wall unit 10A, 10B are provided with indoor side upper surface covering portions 222A, 222B that cover the area between the upper surfaces of the second exterior protruding piece 52 and the second interior protruding piece 53 of the second vertical frame 50.Therefore, the upper end surfaces of the rain barrier 521 and the wind barrier 531 attached to the second exterior protruding piece 52 and the second interior protruding piece 53 are covered by the indoor side upper surface covering portions 222A, 222B and are not exposed to the outside, thereby improving the water-stopping performance and external design.
Moreover, since the projection dimension L1 of the second exterior projection piece 52 and the second interior projection piece 53 is set to a dimension of more than half the interval dimension L between the first main body part 41 and the second main body part 51, that is, L1>L/2, the rain barrier 521 and the wind barrier 531 can be arranged on the center line of the joint between the first main body part 41 and the second main body part 51. Therefore, compared with the conventional structure in which the rain barrier 521 and the wind barrier 531 are provided at a position on the second main body part 51 side with respect to the center line of the joint, the dimension between the first main body part 41 and the second main body part 51, that is, the width dimension L of the joint, can be made smaller. Furthermore, since the first main body part 41 and the second main body part 51 are formed in a flat plate shape along the projection direction, the visible dimension of the connection part of the left and right curtain wall units 10A and 10B can be made smaller. Therefore, a vertical joint with a small visible dimension can be realized in the open joint type curtain wall, and the external design can be improved.

The upper frames 20A, 20B include exterior ridges 22A, 22B and interior ridges 23A, 23B that protrude from the upper surfaces of the upper frame main bodies 21A, 21B and have rain barriers 26 and wind barriers 27 attached. The edge positions of the exterior ridges 22A, 22B and interior ridges 23A on the second vertical frame 50 side are aligned with the edge positions of the interior upper surface covering parts 222A, 222B. By providing catch pans 91, 92, the vertical frames 40, 50 and the rain barriers 521, 26 and wind barriers 531, 27 of the upper frames 20A, 20B can be connected, respectively, ensuring watertightness with a simple structure.

The dimension from the center line CL of the joint between the first vertical frame 40 and the second vertical frame 50 in the left-right direction to the end faces of the outdoor upper surface covering parts 221A, 221B is the same as the dimension from the center line CL to the outdoor upper surface covering parts 231A, 231B, improving the external design of the vertical joint.

Since the panel-retaining frame 60 is provided separately from the first main body 41 and the second main body 51, the position and angle of the panel-retaining frame 60 relative to the first vertical frame 40 and the second vertical frame 50 can be freely set. This allows the ingress/egress position and inclination angle of the panel 70 to be freely set, realizing a variety of designs.

The first main body 41 and the second main body 51 are made of plate-like members formed in a straight line along the projection direction, which allows the visible dimensions of the first vertical frame 40 and the second vertical frame 50 to be small, and the connecting parts of the left and right vertical frames 40, 50 to have a slim appearance, improving the external design.

[Modification]
The present invention is not limited to the configuration of the above embodiment. For example, as shown in Fig. 11, a curtain wall unit 10C may be used in which a surface material holding frame material 60 is attached to the outdoor end of a first vertical frame 40C and a second vertical frame 50C, and a panel 70 held by an upper frame 20C, a surface material holding frame material 60, and a lower frame (not shown) is arranged along a vertical plane with the prospective positions aligned.
11, the end portion on the second vertical frame 50C side may be configured such that the indoor side upper surface covering portion 222C protrudes toward the first vertical frame 40 side more than the outdoor side upper surface covering portion 221C, and the end portion on the first vertical frame 40C side may be configured such that the indoor side upper surface covering portion 232C facing the indoor side upper surface covering portion 222C protrudes toward the second vertical frame 50C more than the outdoor side upper surface covering portion 231C facing the outdoor side upper surface covering portion 221C. This allows the width dimension of the joint portion between the indoor side upper surface covering portion 222C and the indoor side upper surface covering portion 232C to be smaller than the width dimension of the joint portion between the outdoor side upper surface covering portion 221C covering the upper surface of the second main body portion 51C of the second vertical frame 50C and the outdoor side upper surface covering portion 231C covering the upper surface of the first main body portion 41C of the first vertical frame 40C, thereby improving the appearance design and watertightness.

In the above embodiment, the edges of the upper frames 20A, 20B on the first vertical frame 40 side are configured so that the indoor side upper surface covering portions 232A, 232B protrude slightly further than the outdoor side upper surface covering portions 231A, 231B, but the edges of the edges of the upper frames 20A, 20B on the first vertical frame 40 side may also be cut in a straight line along the projection direction.
In the above embodiment, the indoor side upper surface covering portions 222A, 222B are provided on the indoor side from the second outdoor protruding piece 52. However, this is not limited to this. For example, the indoor side edge of the indoor side upper surface covering portions 222A, 222B may be extended beyond the second outdoor protruding piece 52 to the outdoor side.

Furthermore, the curtain wall unit is not limited to one that includes a surface material holding frame material 60 that is separate from the first vertical frame 40 and the second vertical frame 50, but may also be one in which the surface material holding portion is integrally formed with the first vertical frame 40 and the second vertical frame 50.

[Summary of the present invention]
The present invention provides a curtain wall constructed by arranging curtain wall units in the left-right and up-down directions, the curtain wall unit being constructed with a frame body having an upper frame, a lower frame, a first vertical frame and a second vertical frame, the first vertical frame of one of two curtain wall units arranged on the left and right and the second vertical frame of the other curtain wall unit being arranged opposite each other in the left-right direction, the first vertical frame being a first main body portion along the projection direction, a first exterior protruding piece and a first interior protruding piece protruding from the projection surface of the first main body portion to the second vertical frame side, the second vertical frame being a second main body portion along the projection direction, a second exterior protruding piece protruding from the projection surface of the second main body portion to the first vertical frame side and arranged on the exterior side of the first exterior protruding piece, and the second exterior protruding piece protruding from the projection surface of the second main body portion to the first vertical frame side and arranged on the exterior side of the first exterior protruding piece. and a second indoor protruding piece protruding toward the first vertical frame side and positioned on the indoor side of the first indoor protruding piece, a tight material is attached to the second outdoor protruding piece and a tight material is attached to the second indoor protruding piece and a tight material is attached to the second indoor protruding piece and a protruding dimension of the second outdoor protruding piece and the second indoor protruding piece is a dimension that is more than half the spacing dimension between the first main body part and the second main body part, the end of the upper frame of the other curtain wall unit on the second vertical frame side is equipped with an indoor side upper surface covering portion that covers at least the space between the upper surfaces of the second outdoor protruding piece and the second indoor protruding piece, and an indoor side upper surface covering portion that is provided on the indoor side of the indoor side upper surface covering portion and covers the upper surface of the second main body part, and the indoor side upper surface covering portion protrudes toward the first main body part further than the outdoor side upper surface covering portion.
According to this embodiment, an indoor upper surface covering portion is provided on the upper frame of each curtain wall unit, covering the space between the upper surfaces of the second outdoor protruding piece and the second indoor protruding piece of the second vertical frame.Therefore, the upper end surfaces of each weatherstripping material attached to the second outdoor protruding piece and the second indoor protruding piece are covered by the indoor upper surface covering portion and are not exposed to the outside, thereby improving the water-stopping performance and external design.
Furthermore, since the protruding dimension of the second exterior protruding piece and the second interior protruding piece is more than half the distance between the first body part and the second body part, each tension material can be arranged on the center line of the joint between the first body part and the second body part. Therefore, compared to the conventional structure in which each tension material is provided at a position on the second body part side with respect to the center line of the joint, the dimension between the first body part and the second body part, i.e., the width dimension of the joint, can be made smaller. Furthermore, since the first body part and the second body part can be formed in a flat plate shape along the projection direction, the visible dimension of the connection part of the left and right curtain wall units can be made small. Therefore, a vertical joint with a small visible dimension can be realized in the open joint type curtain wall.

In the curtain wall of the present invention, the upper frame of the other curtain wall unit comprises an upper frame main body portion and an exterior protrusion and an interior protrusion protruding from the upper surface of the upper frame main body portion, and the exterior protrusion and the interior protrusion are each fitted with a tension material that abuts against the lower frame of the other curtain wall unit arranged above the upper frame, and it is preferable that the edge positions of the exterior protrusion and the interior protrusion on the second vertical frame side coincide with the edge positions of the interior upper surface covering portion.
The upper frame has exterior protrusions and interior protrusions that protrude from the top surface of the upper frame main body and have waterproofing material attached, and the edge positions of the exterior protrusions and interior protrusions on the second vertical frame side are aligned with the edge positions of the interior side upper surface covering part.By providing a catch pan, the waterproofing materials of the vertical frames and upper frame can be made continuous, ensuring watertightness with a simple structure.

In the curtain wall of the present invention, it is preferable that the end portion of the upper frame of one of the curtain wall units on the first vertical frame side is provided with an outdoor upper surface covering portion facing the end face of the outdoor upper surface covering portion and an indoor upper surface covering portion facing the end face of the indoor upper surface covering portion, and that the dimensions from the left-right central axis of the joint between the first vertical frame and the second vertical frame to the end faces of each of the outdoor upper surface covering portions are the same.
With this configuration, the dimensions from the left-right center line of the joint between the first vertical frame and the second vertical frame to the end face of each outdoor upper surface covering portion are the same, thereby improving the appearance design of the vertical joint.

In the curtain wall of the present invention, it is preferable that a panel holding frame material is fixed to the first main body portion and the second main body portion, which holds the left and right edges of the panel material held within the frame body.
Since a panel material holding frame material separate from the first main body portion and the second main body portion is provided, the position and arrangement angle of the panel material holding frame material relative to the first vertical frame and the second vertical frame can be freely set, so the in/out position and inclination angle of the panel material can be freely set, realizing a variety of designs.

In the curtain wall of the present invention, it is preferable that the first main body portion and the second main body portion are composed of plate-like members formed in a straight line along the projection direction, and that the inner surface of the plate-like member is a flat plane.
Since the first main body portion and the second main body portion are constructed of plate-like members formed in a straight line along the projection direction, the visible dimensions of the first vertical frame and the second vertical frame can be reduced and the connecting portions of the left and right vertical frames can be made to have a slim appearance, thereby improving the external design.

1...Curtain wall, 10A...Curtain wall unit, 10B...Curtain wall unit, 10C...Curtain wall unit, 11A...Frame, 11B...Frame, 20A...Upper frame, 20B...Upper frame, 20C...Upper frame, 21A...Upper frame main body, 21B...Upper frame main body, 22A...Exterior protrusion, 22B...Exterior protrusion, 23A...Interior protrusion, 23B...Interior Internal protrusion, 26...rain barrier, 27...wind barrier, 30A...bottom frame, 30B...bottom frame, 40...first vertical frame, 40C...first vertical frame, 41...first main body portion, 41C...first main body portion, 42...first exterior protruding piece, 43...first interior protruding piece, 50...second vertical frame, 50C...second vertical frame, 51...second main body portion, 51C...second main body portion, 52...second exterior protruding piece, 53...second Indoor protruding piece, 60...surface material holding frame material, 61...frame body, 62...edge, 70...panel, 91...catch pan, 92...catch pan, 93...catch pan, 94...catch pan, 221A...outdoor side upper surface covering part, 221B...outdoor side upper surface covering part, 221C...outdoor side upper surface covering part, 222A...indoor side upper surface covering part, 222B...indoor side upper surface covering part, 222C...indoor side upper surface covering part, 231A...outdoor side upper surface covering part, 231B...outdoor side upper surface covering part, 231C...outdoor side upper surface covering part, 232A...indoor side upper surface covering part, 232B...indoor side upper surface covering part, 232C...indoor side upper surface covering part, 411...outer surface, 412...inner surface, 511...outer surface, 512...inner surface, 521...rain barrier, 531...wind barrier.

Claims (5)

A curtain wall constructed by arranging curtain wall units in the left-right and up-down directions,
The curtain wall unit is configured to include a frame body having an upper frame, a lower frame, a first vertical frame, and a second vertical frame,
A first vertical frame of one of the two curtain wall units arranged on the left and right and a second vertical frame of the other curtain wall unit are arranged opposite each other in the left-right direction,
The first vertical frame includes a first main body portion along a projection direction, and a first exterior protruding piece and a first interior protruding piece protruding from a projection surface of the first main body portion toward the second vertical frame side,
The second vertical frame includes a second main body portion along a projection direction, a second exterior protruding piece that protrudes from the projection surface of the second main body portion toward the first vertical frame side and is disposed on the exterior side of the first exterior protruding piece, and a second interior protruding piece that protrudes from the projection surface of the second main body portion toward the first vertical frame side and is disposed on the interior side of the first interior protruding piece,
A tension material is attached to the second exterior protruding piece so as to abut against the first exterior protruding piece,
A tension material is attached to the second chamber protruding piece so as to abut against the second chamber protruding piece,
A protruding dimension of the second exterior protruding piece and the second interior protruding piece is set to a dimension equal to or greater than half of a distance between the first main body portion and the second main body portion,
The end of the upper frame of the other curtain wall unit on the second vertical frame side is
a second interior upper surface covering portion that covers at least the space between the upper surfaces of the second exterior protruding piece and the second interior protruding piece;
a second exterior upper surface covering portion provided on the exterior side of the second interior upper surface covering portion and covering an upper surface of the second main body portion;
The end of the upper frame of the one curtain wall unit on the first vertical frame side is
a first exterior upper surface covering portion provided at a position opposite to an end surface of the second exterior upper surface covering portion and covering an upper surface of the first main body portion;
a first indoor side upper surface covering portion provided at a position opposite to an end surface of the second indoor side upper surface covering portion and covering an upper surface of the first main body portion;
The second indoor-side upper surface covering portion protrudes toward the first main body portion more than the second indoor-side upper surface covering portion , and a width dimension of a joint between the first indoor-side upper surface covering portion and the second indoor-side upper surface covering portion is smaller than a width dimension of a joint between the first indoor-side upper surface covering portion and the second indoor-side upper surface covering portion.
A curtain wall characterized by: The curtain wall according to claim 1,
The upper frame of each curtain wall unit includes an upper frame body portion and an exterior protrusion and an interior protrusion protruding from an upper surface of the upper frame body portion,
The exterior and interior protrusions are each fitted with a tension material that abuts against the lower frame of another curtain wall unit disposed above the upper frame;
The end edge positions of the exterior protrusion and the interior protrusion on the second vertical frame side coincide with the end edge position of the second interior upper surface covering portion ,
A catch pan for closing a joint is disposed between the upper end portions of the first vertical frame and the second vertical frame of each of the curtain wall units,
The catch pan is
A first catch pan arranged at an end of the exterior protrusion and the interior protrusion on the first vertical frame side;
A second catch pan arranged at an end of the exterior protrusion and the interior protrusion on the second vertical frame side;
A third catch pan disposed on the exterior side of the first catch pan;
A fourth catch pan is disposed on the exterior side of the second catch pan.
The respective tension members attached to the second exterior protruding piece and the second interior protruding piece and the respective tension members attached to the exterior protruding strip and the interior protruding strip form a tension line that is continuous through the first catch pan and the second catch pan.
A curtain wall characterized by: The curtain wall according to claim 1 or 2 ,
A curtain wall characterized in that the dimensions from the left-right central axis of the joint between the first vertical frame and the second vertical frame to each end face of the first outdoor upper surface covering portion and the second outdoor upper surface covering portion are the same. In the curtain wall according to any one of claims 1 to 3,
A curtain wall characterized in that a panel holding frame material that holds the left and right edges of the panel material held within the frame body is fixed to the first main body portion and the second main body portion. The curtain wall according to claim 4,
The first body portion and the second body portion are formed of a plate-like member formed linearly along a projection direction,
A curtain wall, characterized in that the inner peripheral surface of the plate-like member is a flat plane.

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