JP2001214560A - Watertight structure of curtain wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain wall preventing rainwater from entering through joints. SOLUTION: A horizontal joint HJ and a vertical joint VJ between panels 30 are closed by gaskets 50 and 10, respectively. The gasket 10 for the vertical joint has a projection 12 in the center along its cross direction, which is sandwiched between the side face parts of the right and left panels and elastically deformed in the horizontal direction; the gasket 10 also has raised parts 11 on both sides along its cross direction, which are elastically deformed under the pressure of the back face parts 33 of the right and left panels and pressed against a joint bar 20. The gasket 50 for the horizontal joint is bonded to a receiving groove 47 provided in the lower portion of the upper panel, and abuts a receiving seat 37 while being elastically deformed, the receiving seat formed at the upper end of the lower panel. Receiving seats 37D are cut in positions on both sides of each panel along the horizontal direction to form gaps G. An isobaric space EV surrounded by the back face parts 33 of the panels 30, the planar part of the gasket 10, the raised parts 11, and the projection 12 communicates with the space portions V of the vertical joint VJ and the horizontal joint HV via the gaps G. Since the isobaric space EV on the back has a pressure equal to pressures within the space portions V, no pressure difference that may suck rainwater W falling therein is created.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a large-scale building such as a building or an apartment house, in which panels are attached to a wall foundation in a horizontal direction and a height direction, and rainwater enters through joints between adjacent panels. The present invention relates to a curtain wall having a watertight structure for preventing airtightness.

[0002]

2. Description of the Related Art In a building constructed of a steel frame, the construction period is shortened by attaching a curtain wall assembled in a factory at a construction site. The curtain wall is assembled by, for example, arranging rectangular panels having a length of 1 m and a width of 2 m in a horizontal direction and a height direction. A vertical joint and a horizontal joint formed between adjacent panels are filled with a gasket made of a soft elastic material or the like, thereby preventing rainwater from entering through the joint.

[0003] As a gasket 1 for vertical joints, for example, hollow portions 1a, 1a pressed on the back surfaces of the left and right panels 2R, 2L are formed near both left and right sides, respectively.
A vertically long soft elastic body in which a pair of ridges 1b, 1b sandwiched between L is formed at substantially the center is used (FIG. 1).
a). The gasket 1 is mounted on a joint bar 3 made of a C channel material. The joint rod 3 has a plurality of pairs of hooks 4
Are formed and screwed to the angle member 7 (FIG. 1c). The hooks 4 are inserted into the locking openings 5 formed in the panels 2R and 2L, and the panels 2R and 2L are pressed down, whereby the panels 2R and 2L are drawn and fixed to the joint bars 3. A side joint gasket 6 is attached to the upper surfaces of the panels 2R and 2L, and the lower ends of the upper panels 2R and 2L arranged in a similar procedure are overlapped on the side joint gasket 6.

[0004]

The space between the panels 2R and 2L arranged in the horizontal direction and the height direction is closed by the vertical joint gasket 1 and the horizontal joint gasket 6, so that rainwater enters the interior of the building. Is preventing. However, in rainy weather accompanied by strong wind, the wind F is applied to the surfaces of the panels 2R and 2L and the joint between the panels 2R and 2L. The side joint gasket 6 is sandwiched between the upper panel 2R, 2L and the lower panel 2R, 2L, and is not directly exposed to the wind F (FIG. 1b,
d).

On the other hand, in the gasket 1 for vertical joints directly exposed to the wind F, the ridges 1b, 1b in contact with the side surfaces of the panels 2R, 2L are blown by the wind F (FIG. 1c), and the ridges 1b, 1b
A gap is likely to be formed between the first side and the side surfaces of the panels 2R and 2L. Moreover, the joint space between the panels 2R and 2L to which the wind F has been applied has a higher-pressure atmosphere than the rear surfaces of the panels 2R and 2L. Therefore, the rainwater W that has entered the joint space is easily sucked from the gaps between the ridges 1b, 1b and the side surfaces of the panels 2R, 2L toward the low-pressure panels 2R, 2L rear surfaces (FIG. 1d). The rainwater W that has entered the rear surfaces of the panels 2R and 2L promotes the corrosion of the metal members, reduces the durability of the building, and is caused by fungi and the like that easily propagate in a humid atmosphere caused by the penetration of the rainwater W. It also causes odor.

[0006]

SUMMARY OF THE INVENTION The present invention has been devised to solve such a problem. A joint space between panels is formed to communicate with the back side of the panel. It is another object of the present invention to provide a curtain wall having a watertight structure in which the back side is maintained at an equal pressure atmosphere and the suction of rainwater caused by a pressure difference is prevented.

[0007] In order to achieve the object, the present invention provides a gasket for side joints for closing a side joint between upper and lower panels in a curtain wall in which a plurality of panels are arranged in a horizontal direction and a height direction and fixed to a wall foundation. And a vertical joint gasket for closing the vertical joint between the left and right panels, and the vertical joint gasket is sandwiched between the side portions of the left and right panels and has a protruding portion elastically deformed in the lateral direction at the center in the width direction. The gasket for the horizontal joint has one surface attached to the receiving groove formed at the lower end of the upper panel.
It abuts against the receiving seat provided at the upper end of the lower panel in an elastically compressed state, the receiving seat is cut off at both lateral positions of each panel to form a gap, and the rear surface of the panel and the flat portion of the vertical joint gasket, A space surrounded by the protruding portion and the protruding portion is an equal pressure space communicating with the space portion of the horizontal joint via the gap.

[0008] In the vertical joint gasket, it is preferable that the rear surface side of the protruding portion be a central concave portion with the bottom raised. Glue one side of the back surface in the width direction sandwiching the central recess to the joint bar, and paste the release paper on the adhesive applied to the back surface of the other side in the width direction, making it easy to screw the joint bar to the base angle material Become. Each panel is attached to a joint bar by forming vertically long locking openings on the upper and lower sides of the back surface provided on both lateral sides of each panel, and inserting hooks into the locking openings. At this time, when the panel is moved downward by inserting the hook into the locking opening, it is preferable to attach a slope to the hook to draw the panel toward the joint bar.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vertical joint gasket 10 used in the present invention is made of a long soft elastic material, and has a compressible ridge 1 which is higher on both sides in the width direction than a side wall 22 of a joint rod 20.
1 are formed, and a protruding portion 12 that is taller than the raised portion 11 is formed at the center in the width direction (FIG. 2). Ridge 1
A flat portion 15 is provided between the projection 1 and the projection 12. On the back surface side of the protruding portion 12, a central concave portion 13 slightly raised is formed. An adhesive is applied to the bottom surfaces on both sides sandwiching the central concave portion 13, and a release paper 14 is attached thereon. The raised portion 11 is hollow in FIG. 2A to facilitate elastic deformation of the vertical joint gasket 10 along the vertical direction, but is solid when highly compressible rubber is used. (FIG. 2b). Projection 12
In order to facilitate elastic deformation of the vertical joint gasket 10 in the plane direction, it is preferable that the cylindrical part 12b be formed at the tip of the upright part 12a rising from the plane part of the gasket 10. Instead of the cylindrical portion 12b, it is also possible to use a solid portion. The vertical joint gasket 10 is mounted on a joint rod 20 shown in FIG. The joint rods 20 are formed on both sides of the back surface 21 having the same width as the vertical joint gasket 10 from both sides.
2 is up. A plurality of hooks 23 are formed on the side portions 22 on both sides in the height direction.
The hook 23 has a slope 23a that opens upward.

The right lower panel 30RD and the right upper panel 30R shown in FIG.
U, left lower panel 30LD, left upper panel 30LU
(FIG. 3). Note that in FIG. 3, each panel 30RD, 30RU, 30LD, 30
Only the corners of the LU are shown. Lower right panel 3
The 0RD is formed by bending a single metal plate, and the side portion of the front surface portion 31RD is bent inward to become the side surface portion 32RD, and the side surface portion 32RD is further bent to become the back surface portion 33RD. A locking opening 34RD into which the hook 23 of the joint bar 20 is fitted is provided on the back surface 33RD.
Are formed. 2 at the bottom and top and bottom of the back part 33RD
When the locking openings 34RD are provided (FIG. 5A), the left side of the right lower panel 30RD is supported by the joint bar 20 at two upper and lower positions. However, without being restricted to this, it is also possible to form three or more locking openings 34RD in the height direction in consideration of the height of the lower right panel 30RD.

The upper portion of the surface portion 31RD is bent inward to become an upper surface portion 35RD, and the upper surface portion 35RD becomes an upright portion 36RD which is further bent upward. Upper surface part 35
It is preferable that the RD be inclined forward and downward in order to promote the discharge of the rainwater W that has fallen. Standing part 36RD
Is bent forward to form a receiving seat 37RD. The receiving seat 37RD is cut out near the end of the lower right panel 30RD to form a cutout 38RD. The notch portion 38RD projects slightly forward from the upright portion 36RD. A reinforcing member 39RD is welded to the back surface of the upright portion 36RD.

The cross joint gasket 50 is attached and attached to the receiving groove 47RU at the factory stage (FIG. 3), but may be attached to the receiving seat 37RD for on-site construction. The horizontal joint gasket 50 is made of an elastic body similar to the vertical joint gasket 10 and has a prismatic shape, and one surface thereof is attached to the receiving groove 47RU or the receiving seat 37RD. Receiver 37RD
Does not extend to the notch 38RD, and forms a gap G between the notch 38RD and the left end of the lower right panel 30RD. The notch 38RD projects slightly forward from the upper end of the upright portion 36RD to partition the lower part of the gap G. The notch 38RD slightly projecting forward serves as a return for the rainwater W that tries to go back to the upstanding portion 36RU similarly to the receiving seat 37RD.

Lower right panel 30RD in height direction
The right upper panel 30RU, which is superimposed on the front side, is formed by bending a single metal plate and bending a single metal plate in the same manner. 32RU, and the side 32RU is further bent to form the back 33RU. A locking opening 34RU into which the hook 23 of the joint bar 20 is fitted is formed in the back surface portion 33RU. The lower portion of the surface portion 31RU is bent inward to become the bottom portion 45RU, and the bottom portion 4RU is formed.
5RU becomes the raised portion 46RU further bent upward. It is preferable that the bottom surface portion 45RU be provided with the same forward-downward inclination angle as the upper surface portion 35RD in order to block rainwater W from entering. The upper portion of the upright portion 46RU is bent toward the rear surface to form a receiving groove 47RU. Receiving groove 47
A side joint gasket 50 is attached to the RU.

Similarly to the lower right panel 30RD, the left lower panel 30LD also has a locking opening 34LD in which the hook 23 is fitted, and a side joint gasket 50 is mounted in the receiving groove 47LU. Also in this case, a gap G is provided between the side joint gasket 50 and the end of the left lower panel 30LD. A lower portion of the gap G has a cutout portion 38L that slightly projects forward from the upper end of the upright portion 36LD.
It is divided by D. The notch 38LD slightly protrudes forward, so that the notch 38LD rises in the same manner as the receiving seat 37LD.
Acts as a return for rainwater W going back to the LD. The left upper panel 30LU superimposed on the left lower panel 30LD in the height direction is also a right upper panel 30RU.
The locking opening 34 into which the hook 23 is fitted in the same manner as described above.
A receiving groove 47LU having an LU and in which the side joint gasket 50 is fitted is formed at a lower portion. In FIG. 3,
The upper left structure of the panel is the lower right panel 30RD, the lower left structure is the upper right panel 30RU, the upper right structure is the lower left panel 30LD, and the lower right structure is the upper left panel 30.
Although indicated by LU, each panel is formed in the same shape so as to be arranged in the horizontal direction and the height direction.

Next, a method of attaching a curtain wall to a wall foundation 60 in which foundation angle members 62 and 63 are attached to columns 61 at predetermined intervals vertically and horizontally will be described. The joint bar 20 is screwed to the base angle member 62 in the height direction corresponding to the panel width (FIG. 4A). At this time, the base level GL is set below the wall base 60, and the positioning is performed such that the hooks 23 of the joint bars 20 are at the same height based on the base level GL. The longitudinal joint gasket 10 has one side in the width direction affixed to the joint bar 20 over the entire length with an adhesive that has been peeled off and released from one side of the release paper 14 at a factory or the like in advance, and is located between the joint bar 20 and the joint. There is no gap.
When the joint rod 20 is fixed to the column 61, the other side of the vertical joint gasket 10 where the release paper 14 remains is turned up, and the joint rod 2 is fixed.
Screw 6 into the screw hole 24 formed in the center of the
4 and screw the screw 63 into the base angle member 62 (FIG. 4b). Since the vertical joint gasket 10 has a central recess 13 with the bottom raised at the center in the width direction, the gasket 10 can be easily turned in the width direction. The central recess 13 also serves as a head receiving space for the screwed screw 64.

In connecting the plurality of vertical joint gaskets 10 in the height direction, the vertical joint gasket 10D is slightly retracted from the upper end of the lower joint rod 20D, and the space S without the vertical joint gasket 10D is moved to the lower side. Joint rod 20
It is preferably provided above D (FIG. 4c). On the other hand, in the upper joint bar 20U, the vertical joint gasket 10U is protruded from the lower end of the upper joint bar 20U by an amount corresponding to the height of the space S. When the projecting portion of the vertical joint gasket 10U is fitted into the space S of the lower joint bar 20D and connected to the vertical joint gasket 10D, the joint of the vertical joint gaskets 10U, 10D and the joint of the joint bars 20U, 20D are high. Because of the displacement in the vertical direction, the passage of water, ventilation, etc. through the joints is prevented.

Joint rod 2 fixed to base angle member 62
The panel 30 is attached to the panel 0. When the panel 30 is mounted, the locking openings 34 provided on the upper and lower surfaces of the panel 30 are provided.
The hook 23 of the joint bar 20 is inserted into the
0 is moved downward (FIG. 5a). The panel 30 is guided by the slope 23 a of the hook 23 as it moves downward, and is drawn toward the joint bar 20. As a result, the raised portions 11 of the vertical joint gaskets 10 are
3 and pressed against the joint bar 20 in a compressed state. At this time, for example, the right panel 30R is hung slightly on the left panel 30L so as not to lay the cylindrical portion 12b of the vertical joint gasket 10 on the back surface 33 of the panel 30 and is hooked on the hook 23 (FIG. 5b). Hanging hook 23
After the right side panel 3 is completely inserted into the locking opening 34,
It is preferable to shift 0R rightward (FIG. 5c). In this manner, the cylindrical portion 12b is sandwiched between the left panel 30L and the right panel 30R, and the raised portion 11 is compressed by the back surface 33 of the left panel 30L and the right panel 30R.
Next, a screw 6 is inserted into the screw hole 39a formed in the reinforcing member 39.
5, each panel 30 is fixed to the wall foundation 60 by screwing a screw 65 into the base angle member 63 (FIG. 5A).

A vertical joint VJ and a horizontal joint HJ are observed between the panels 30 arranged in the horizontal direction and the height direction, as shown in FIG. You. The vertical joint VJ is a protrusion 1 sandwiched between the right panels 30RD, 30RU and the left panels 30LD, 30LU.
It is closed by a vertical joint gasket 10 having a number 2. As shown in FIG. 6, the horizontal joints HJ are connected to the lower panels 30RD and 30RD.
LD standing parts 36RD, 36LD and upper panel 30R
U and 30LU (FIG. 3) are connected to a space V between the upright portions 46RU and 46LU (FIG. 3). The space V is
The back surface 33 of each panel 30 and the gasket 1 for vertical joints are provided through a gap G at the end of the lower panel 30RD, 30LD.
In addition, it communicates with the constant pressure space EV surrounded by the flat portion 15, the raised portion 11, and the protruding portion 12.

Therefore, the wind force F applied to the wall surface is transmitted from the horizontal joint HJ to the equal pressure space EV via the space V and the gap G as shown by the arrow. As a result, the vertical joint V
J, the air pressure in the horizontal joint HJ and the air pressure in the equal pressure space EV become equal, and no pressure difference occurs between the two. FIG. 7 (a)
The equal pressure space forming path at this time is shown in a state viewed from the back side of the wall surface. The rainwater W hits the panel 30 and flows down the wall surface, but also falls on the vertical joint VJ and the horizontal joint HJ. Most of the rainwater W that has fallen into the vertical joint VJ flows down along the vertical joint VJ because the vertical joint VJ is blocked by the projecting portion 12 of the vertical joint gasket 10. The protrusions 1 are formed by the side surfaces 32R, 32L of the panels 30R, 30L pressed from the left and right.
2 is elastically compressed (FIG. 7b), and furthermore, isobaric space E
Since the air pressure of V is equal to the outside air on the front side, the suction force does not work, and the protruding portion 12 and the side portions 32R, 32
Even if a gap is formed between L and L, the rainwater W does not enter the equal pressure space EV.

Most of the rainwater W that has fallen into the horizontal joint HJ is:
Upper surface portions 35RD, 35 of lower panels 30RD, 30LD
Outflows along the LD. The outflow of the rainwater W is promoted by providing the upper surfaces 35RD and 35LD with inclined surfaces that become lower toward the front side. Some of the rainwater W that has fallen into the horizontal joint HJ flows into the space V between the rising portion 36D of the lower panel 30D and the upper panel 30U, and tends to trace the rising portion 36D by the wind F. However, standing part 3
The protrusion of the receiving seat 37D and the notch 38D at the upper end of 6D turns back to prevent the rainwater W from further rising (FIG. 7c). Depending on the wind force F, the side joint gasket 50 may be compressed and a gap may be formed between the receiving seat 37D and the receiving groove 47U.
Does not occur between the space V and the equal-pressure space EV. Therefore, even if a gap is formed, the rainwater W is prevented from entering the constant pressure space EV from the gap. In this way, the rainwater W that tends to enter the wall surface from the vertical joint VJ and the horizontal joint HJ is blocked by the vertical joint gasket 10 and the horizontal joint gasket 50. Therefore, the wall surface and the wall foundation are maintained in a clean and healthy state for a long time without corrosion due to the infiltrated rainwater W and no generation of offensive odor due to molds breeding in a humid atmosphere.

[0021]

As described above, according to the present invention, when a vertical joint and a horizontal joint formed between a plurality of panels arranged in the horizontal direction and the height direction are closed with an elastic gasket,
Use a vertical joint gasket with a raised part pressed on the back side of the panel on both sides in the width direction, and a protruding part sandwiched between the side parts of the left and right panels and elastically deformed in the horizontal direction formed in the center part in the width direction. Through the gap formed near the end of the land gasket, the constant pressure space surrounded by the back surface of the panel, the flat portion, the raised portion, and the projecting portion of the vertical joint gasket communicates with the joint space. For this reason, the atmospheric pressure in the constant pressure space is equal to that of the joint space portion, and there is no pressure difference that causes rainwater to be sucked. Therefore, even when a large wind pressure is applied to the wall surface during a storm or the like, rainwater causing rust does not enter the joint from the joint portion, and the wall surface is maintained in a clean and healthy state for a long period of time.

[Brief description of the drawings]

1 shows a partial perspective view (a) of a curtain wall in which a joint is closed using a conventional gasket as viewed from the front side, a partial perspective view (b) as viewed from the back side, and a vertical joint structure. Horizontal sectional view (c) and side sectional view showing the structure of the horizontal joint (d)

FIG. 2 shows several examples of gaskets for vertical joints used in the present invention.

FIG. 3 is an exploded perspective view partially showing the relationship between a joint bar to which a vertical joint gasket is attached and upper, lower, left and right panels.

FIG. 4 is an explanatory view of a wall foundation to which a curtain wall is attached (a), a screw fixing operation for fixing a joint rod to a base angle material (b), and an explanatory view of connecting the joint rod up and down (c).

FIG. 5 (a) is a diagram illustrating the work of attaching the panel to the wall foundation from the back side, and FIG. 5 (b) is a diagram illustrating the work of pressing the right panel against the fixed left panel and then shifting the panel to the right to attach it to the regular position (b). , C)

FIG. 6 is a perspective view of the curtain wall to which the left, right, top, and bottom panels are attached, as seen from the front side with a partial see-through;

7A is a view of the curtain wall viewed from the back side, FIG. 7A is a horizontal cross-sectional view showing a vertical joint structure, and FIG. 7B is a side cross-sectional view showing a horizontal joint structure.

[Explanation of symbols]

10: Gasket for vertical joint 11: Raised part 12:
Projecting portion 13: Central concave portion 14: Release paper 15:
Flat part 20: Joint bar 22: Side part 23: Hook 23a: Slope 30: Panel 31: Surface part 32: Side part 3
3: Back surface part 34: Locking opening 35: Upper surface part 3
6: Standing part 37: Receiving seat 38: Notch part 39: Reinforcement member 45: Bottom part 46: Standing part
47: Receiving groove (R attached to each reference number indicates right side, L indicates left side, D indicates lower stage, U indicates upper stage, respectively) 50: Gasket for horizontal joint 60: Wall foundation 62, 63: Angle material 6 for base 6
4,65: Screw F: Wind power W: Rainwater G: Clearance GL: Basic level VJ: Vertical joint HJ: Horizontal joint V: Space EV: Isobaric space

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuhisa Matsumaru 7-2 Takayashinmachi, Ichikawa-shi, Chiba F-term in Nissin Sogo Building Materials Co., Ltd. 2E002 NA01 NB03 PA04 PA07 RA00 RB01 RB03 RB06 SA01 SA02 UA01 UA02 UB01 UB02 UB04 XA03 XA11 2E110 AA13 AA14 AA18 AB04 BD03 BD23 BD26 CA07 CA08 CA09 CA14 CC04 DA03 DA10 DA15 DA16 DA22 DC02 DC12 DD02 DD14

Claims (4)

[Claims] In a curtain wall in which a plurality of panels are arranged in a horizontal direction and a height direction and fixed to a wall foundation, a gasket for a horizontal joint between the upper and lower panels and a vertical joint between the left and right panels are provided. The gasket for vertical joints is closed.The gasket for vertical joints is elastically deformed by pressing the protrusions that are sandwiched between the side surfaces of the left and right panels and elastically deform in the horizontal direction at the center in the width direction, and pressed by the rear surfaces of the left and right panels. The horizontal joint gasket is affixed to the receiving groove formed on the lower rear surface of the lower panel, and elastically attached to the receiving seat provided on the upper rear surface of the lower panel. The abutment is abutted in a compressed state, a gap is formed by cutting out the receiving seat at both lateral positions of each panel, and the raised portion, the projected portion, and the raised portion / projected portion of the panel back surface and the vertical joint gasket are formed. A watertight structure for a curtain wall, wherein a space surrounded by a plane portion between the portions is an equal pressure space which communicates with the space portion of the horizontal joint through the gap. 2. The watertight structure according to claim 1, wherein a vertical joint gasket is used in which the rear surface side of the projecting portion is a central concave portion in a raised state. 3. The vertical joint gasket is adhered to the joint rod with an adhesive applied to one widthwise back surface of the vertical joint gasket, and a release paper is attached to the adhesive applied to the other widthwise back surface. The watertight structure according to claim 1, wherein a gasket for vertical joint is used. 4. A vertically long locking opening is formed above and below a back surface provided on both lateral sides of each panel, and hooks inserted into the locking openings are formed on side surfaces of the joint bar. ,
The hook has a slope which draws each panel toward the joint bar when inserted into the locking opening.
3. The watertight structure according to any one of 3.