JPH0362859B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for attaching glass plates for seismic isolation.

[Prior Art] A backkumion method is known as one of the methods for attaching glass plates. This method eliminates the part visible from the outside in the vertical attachment part of the glass plate, and glues the mullion on the indoor side and the glass plate with a weather-resistant and strong adhesive sealant, such as silicone, and uses this adhesive strength. This is a construction method that attempts to give glass strength. FIG. 2 shows a conventional example of such a backkumion system, in which a glass plate 1 is bonded to a backkumion 2 using structural silicone 7. In this case, if hard silicone is used, wind pressure resistance can be obtained, but the third
As shown in the figure, large shear deformation is applied to this silicone portion, making it prone to fatigue and breakage. On the other hand, if soft silicone is used in response to earthquakes, this silicone will easily deform when the glass plate is exposed to wind pressure, making the glass plate susceptible to stress deformation and causing large stress on the edges of the glass plate. There is a risk that this will occur and cause destruction, which is a major obstacle in practical use.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems in the conventional backbone ion system. It is characterized by absorbing lateral shearing deformation that occurs between the glass plate and the backbone.

That is, in the present invention, a secondary backbone is screwed to a backbone arranged on the indoor side along the mounting end surface of the glass plate through a sliding washer and a horizontal loose hole, and the glass plate is attached to the secondary backbone. The present invention provides a new installation method for adhesively fixing the parts using a sealant.

Next, the present invention will be specifically explained with reference to the drawings. FIG. 1 shows a cross section of a mounting portion according to the glass plate mounting method of the present invention. In the figure, 1 is a glass plate, 2 is a backkumion, 3 is a secondary backkumion, and glass plate 1 is a secondary backkumion 3.
In addition, sealants such as structural silicones7
It is fixed with adhesive. Although not shown in the drawings, the backbone 2 is attached to a slab or the like that constitutes a part of the structure of a building, and is disposed on the indoor side along the attachment end surface of the glass plate 1. The secondary backbone 3 is attached to the backbone 2 so as to absorb shear displacement in the lateral direction parallel to the glass plate surface during an earthquake, and the two constitute a double backbone.

That is, the secondary backbone 3 is a hollow structure with a rectangular cross section, and a horizontally elongated loose hole 5 is provided on the surface facing the backbone 2 so that it can be inserted into the backbone 2 through a sliding washer 4. It is attached with screws 6, and when a lateral force of more than a certain level is applied between the backbone 2 and the glass plate 1 during an earthquake, the secondary backbone 3 is attached to the backbone 2 by the sliding washer 4. It is designed to be able to slide within the range of the loose hole 5. In this case, the backbone 2 and the secondary backbone 3 are connected by screws 6 at two or more locations in the longitudinal direction, and the number of screws 6 is appropriately selected within a range that allows the two to be connected with sufficient strength.

Further, the sliding washer 4 is desirably made of, for example, a fluorine resin such as Teflon (trade name) so that the secondary backbone 3 can be displaced relative to the backbone 2 when the screw 6 is tightened. Note that 8 in the figure is a watertight sealant filled in the joints of the glass plates.

When the glass plate 1 is installed, its upper and lower ends are usually held with sashes, but its left and right ends are adhesively fixed to the secondary backbone 3 with a sealant 7. In this case, it is desirable to use a hard sealant as the sealant 7 to bond the glass plate 1 to the secondary backbone 3 as firmly as possible. This is because even if the glass plate 1 is adhesively fixed with a hard sealant that does not easily deform, lateral shear displacement during an earthquake can be absorbed between the secondary backbone 3 and the backbone 2. Therefore, the sealant 7 does not deform when such a lateral shearing force occurs, and only needs to transmit this to the secondary backbone 3.

On the other hand, by firmly adhering and fixing the glass plate 1 to the secondary backbone 3 with a hard sealant that does not easily deform, the glass plate 1 can have strong wind pressure resistance.

[Effects of the Invention] As explained above, the present invention does not directly adhesively fix the glass plate to the backbone mion, but instead attaches a secondary backbone to the conventional backbone mion with screws through sliding washers and loose holes. When a lateral shearing force is applied between the two, the double backbone structure allows for relative movement within the range of the loose hole, so the glass plate is firmly attached to the double backbone with a hard sealant. Even if the sealant is fixed with adhesive, the lateral shearing force is absorbed within the double backbone, thereby preventing fatigue failure of the sealant. Furthermore, since it is a hard sealant, the sealant deforms little when the glass plate is subjected to wind pressure, so it is possible to firmly hold the glass plate and eliminate the occurrence of large stress on the glass edges.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a glass plate attachment part according to the present invention, and FIGS. 2 and 3 are cross-sectional views of a conventional example. In the figure, 1 is a glass plate, 2 is a backkumion, 3 is a double backkumion, 4 is a sliding washer, 5 is a loose hole, and 6 is a screw.

Claims (1)

[Claims] 1. A secondary backbone is screwed to a backbone arranged on the indoor side along the mounting end surface of the glass plate through a sliding washer and a horizontal loose hole, A seismic isolation mounting method for glass plates characterized by adhesively fixing the glass plates with a sealant. 2. A seismic isolation mounting method for a glass plate according to claim 1, characterized in that the glass plate is adhesively fixed to the secondary backbone with a hard sealant.