JP6584992B2 - Glass panel support structure - Google Patents

Description

  The present invention relates to a glass panel support structure, and more particularly to a glass panel support structure in an SSG (Structural Sealant Glazing) construction method.

  Conventionally, an SSG construction method is known as a construction method for supporting a glass panel constituting a wall surface of a building. SSG is a construction method in which a load is supported by bonding a glass panel and a support member with a structural sealant. The SSG construction method has a feature that the outdoor side becomes smooth as compared with a conventional curtain wall that supports a load by fitting a glass panel in an aluminum frame (see, for example, Patent Document 1 for the SSG construction method).

Special table 2014-503725 gazette

  Since the SSG construction method depends on the adhesion durability by the structural sealant, it is necessary to temporarily prevent the glass panel from dropping off when an adhesion failure occurs for some reason. To that end, a glass panel such as the DPG (Dot-point Glazing) construction method is drilled and held with hardware, or the glass panel is held with a small point support hardware without drilling holes in the glass panel. A way to do this is conceivable. However, in any of the methods, there is a possibility that the load (generated stress) of the glass panel is locally increased by a negative wind load.

  This invention is made in view of such a subject, and the objective is a structural sealant, reducing the local load (generated stress) of the glass panel by the negative pressure wind load in the glass panel support structure of SSG construction method. It is an object of the present invention to provide a technique capable of preventing the glass panel itself from falling off even when an adhesion failure occurs.

  In order to solve the above problems, a glass panel support structure according to an aspect of the present invention includes a glass panel, a support member that supports the glass panel, a structural sealant that bonds the glass panel and the support member, and an edge of the glass panel. And a fail-safe support hardware that supports the glass panel when adhesion failure occurs in the structural sealant. When the adhesive state of the structural sealant is normal, a gap is formed between the front surface of the glass panel and the failsafe support hardware.

  According to the present invention, in the glass panel support structure (such as point support) of the SSG construction method, the adhesion of the structural sealant is generated while reducing the load on the glass panel (stress generated locally) due to the negative pressure wind load. Even in this case, the glass panel can be prevented from falling off.

It is a schematic front view of the curtain wall to which the glass panel support structure which concerns on embodiment of this invention was applied. It is a schematic cross-sectional view of A part of the curtain wall shown in FIG. It is a schematic front view of the curtain wall which concerns on the modification of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. The embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  FIG. 1 is a schematic front view of a curtain wall 10 to which a glass panel support structure according to an embodiment of the present invention is applied. As shown in FIG. 1, the curtain wall 10 includes a plurality of glass panels 16 arranged vertically and horizontally. The glass panel support structure according to the embodiment of the present invention relates to the SSG construction method. As described above, the SSG construction method is a construction method in which a load is supported by adhering the glass panel 16 and a support member (for example, vertical or invisible) with a structural sealant.

  FIG. 2 is a schematic cross-sectional view of a portion A of the curtain wall 10 shown in FIG. As shown in FIG. 2, the curtain wall 10 includes a vertical 12 as a supporting member extending in the vertical direction, a plurality of glass panels 16 attached to the vertical 30, a fail-safe support hardware 28, and a structural sealant 32. Is provided. The vertical 12 is fixed to a building frame (not shown) to which the curtain wall 10 is attached.

  The glass panel 16 is configured as a multi-layer glass in which a space 16c is provided between two glass plates 16a and 16b that are opposed to each other in a separated state, and dry air is sealed in the space 16c. The glass panel 16 includes a spacer 16d for defining the distance between the glass plates 16a and 16b and a desiccant 16e for preventing condensation in the space 16c. In addition, the glass panel 16 is not limited to a multilayer glass, A single layer glass and a laminated glass may be sufficient.

  As shown in FIG. 2, the vertical 12 includes a columnar vertical main body 12a having a hollow interior, an SG channel engaging portion 12c formed on the front surface 12b of the vertical main body 12a, and a vertical And a support hardware mounting portion 12d formed on the front surface 12b of the main body portion 12a.

  In the present embodiment, the stand 12 includes an SG channel 24 as a seismic isolation member. The SG channel 24 has a substantially U-shaped cross section. The SG channel 24 may be formed of aluminum, stainless steel, resin, or the like. The SG channel 24 is attached to the vertical main body 12a by fitting the SG channel engaging portion 12c into a substantially U-shaped groove. The structural sealant 32 bonds the SG channel 24 and the rear surface 16 f of the glass panel 16. Thus, the glass panel 16 is attached to the vertical 12 via the SG channel 24. The SG channel 24 has a function of preventing a shear displacement from occurring in the structural sealant 32.

  The failsafe support metal 28 is formed by connecting a first piece 28a and a second piece 28b in a substantially L-shaped cross section. The fail-safe support metal 28 may be formed of aluminum, stainless steel, resin, or the like. The first piece 28 a of the failsafe support metal 28 is fixed to the support metal mounting part 12 d of the vertical 12. The second piece 28b of the failsafe support hardware 28 is arranged so as to cover a part of the edge of the front surface 16g of the glass panel 16.

  When the pressure inside the room becomes higher than the outside, or when peeling occurs on the outer wall surface (such as a corner of the building) perpendicular to the outer wall surface due to the external wind speed, a negative wind load is applied to the glass panel 16. It takes. Due to this negative pressure wind load or the like, the structural sealant 32 may be pulled and adhesion failure such as peeling may occur. The fail-safe support metal 28 has a function of supporting the glass panel 16 and preventing the glass panel 16 from falling off when an adhesion failure occurs in the structural sealant 32.

  Here, in the glass panel support structure according to the present embodiment, when the adhesion state of the structural sealant 32 is normal, it is between the front surface 16g of the glass panel 16 and the second piece 28b of the failsafe support hardware 28. A gap 34 is formed. In other words, when the adhesive state of the structural sealant 32 is normal, the front face 16g of the glass panel 16 and the second piece 28b of the failsafe support metal 28 are not in contact with each other.

  If the front face 16g of the glass panel 16 and the second piece 28b of the failsafe support metal 28 are in contact with each other, if a negative wind load is applied to the glass panel 16, it is locally applied to the edge of the glass panel 16. A high load is applied (stress is generated), and the glass panel 16 may be damaged. On the other hand, in the glass panel support structure according to the present embodiment, the front surface 16g of the glass panel 16 and the second piece 28b of the failsafe support hardware 28 are not in contact with each other when the adhesion state is normal. Even if a negative wind load is applied to 16, the edge of the glass panel 16 is not loaded (local stress is generated), and therefore the glass panel 16 is not damaged.

  When adhesion failure such as peeling occurs in the structural sealant 32, the front surface 16g of the glass panel 16 and the second piece 28b of the failsafe support metal 28 come into contact. In this case, the structural sealant Since the negative pressure air escapes because the poorly bonded portions 32 spread, the glass panel 16 is not subjected to a large negative pressure wind load in the first place. Therefore, even if it is the small failsafe support metal 28 which can support the weight of the glass panel 16, it can fully prevent the glass panel 16 from dropping off. The small fail-safe support metal 28 is not conspicuous and is advantageous from the viewpoint of design.

  In the curtain wall 10 shown in FIG. 1, the fail-safe support hardware 28 is disposed on two opposing side portions of one glass panel 16. FIG. 3 is a schematic front view of a curtain wall 40 according to a modification of the present invention. In the curtain wall 40 shown in FIG. 3, the fail-safe support hardware 28 is disposed on the upper and lower sides of one glass panel 16 facing each other. In the modification shown in FIG. 3, the fail-safe support metal 28 is attached to an unbroken piece (not shown) that is bridged in the lateral direction between two stands. In order to suitably prevent the glass panel 16 from falling off, it is desirable that the fail-safe support metal 28 is arranged at least on two opposing sides of the glass panel 16 in this way. Of course, the fail-safe support hardware 28 may be disposed on all four sides of the glass panel 16.

  The present invention has been described based on the embodiments. It is understood by those skilled in the art that this embodiment is an exemplification, and that various modifications and changes are possible within the scope of the claims of the present invention, and such modifications and changes are also within the scope of the claims of the present invention. It is a place. Accordingly, the description and drawings herein are to be regarded as illustrative rather than restrictive.

  For example, in the above-described embodiment, nothing is provided in the gap 34 between the front surface 16g of the glass panel 16 and the second piece 28b of the failsafe support hardware 28 (that is, the gap 34 is an air layer). However, a member having an extremely low spring constant (for example, a member that can be easily deformed like a sponge) may be provided in the gap 34. Also in this case, it is possible to prevent the glass panel 16 from falling off even when a bonding failure of the structural sealant 32 occurs while preventing a local load (stress) from being applied to the glass panel 16.

  The following invention is recognized from the above description.

  In order to solve the above problems, a glass panel support structure according to an aspect of the present invention includes a glass panel, a support member that supports the glass panel, a structural sealant that bonds the glass panel and the support member, and an edge of the glass panel. And a fail-safe support hardware that supports the glass panel when adhesion failure occurs in the structural sealant. When the adhesive state of the structural sealant is normal, a gap is formed between the front surface of the glass panel and the failsafe support hardware.

  According to this aspect, since the glass panel and the failsafe support hardware are not in contact with each other when the adhesion state is normal, even if a negative wind load is applied to the glass panel, a local load (stress) is applied to the glass panel. Will not take. Moreover, when the adhesion failure of the structural sealant occurs, the glass panel can be prevented from falling off by the fail-safe support hardware.

  The support member may include a seismic isolation member for preventing a shear displacement from occurring in the structural sealant. The structural sealant may bond the glass panel and the seismic isolation member.

  The failsafe support hardware may be disposed at least on two opposing sides of the glass panel.

  10, 40 Curtain Wall, 12 Standing, 16 Glass Panel, 24 SG Channel, 28 Failsafe Support Hardware, 30 Standing, 32 Structural Sealant, 34 Clearance.

Claims (3)

A glass panel,
A support member for supporting the glass panel;
A structural sealant for bonding the glass panel and the support member;
A fail-safe support hardware that supports the glass panel when an adhesion failure occurs in the structural sealant, which is disposed at an edge of the glass panel;
With
A glass panel support structure, wherein a gap is formed between the front surface of the glass panel and the fail-safe support hardware when the structural sealant is in a normal adhesion state. The support member includes a seismic isolation member for preventing shear displacement from occurring in the structural sealant,
The glass panel support structure according to claim 1, wherein the structural sealant bonds the glass panel and the seismic isolation member.   3. The glass panel support structure according to claim 1, wherein the fail-safe support hardware is arranged at least on two opposing sides of the glass panel.

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