JPH0663294B2 - External panel turning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is to bond an exterior panel, for example, a glass plate, which is an exterior material, on the outer surface of a building to a cubic or metal frame provided on the indoor side with a structural sealing material. The method can be widely applied to not only wall surfaces but also horizontal or inclined roofs.

(Prior Art) Building construction has a construction aiming at an aesthetic effect on the appearance of the building by using an exterior material such as a glass plate on part or all of the outer wall so that the frame material is not exposed outside. There is.

This construction method has a glass stand that can be seen through the whole or has an appearance that only the horizontal or vertical frame material is exposed on the outer wall and the glass becomes a strip shape, for example, the upper and lower two sides or the left and right of the four circumferences of the glass plate. One of the two sides is inserted into a metal sash, the moment is fixed with a low modulus weather sealing material, and the other two sides are bonded and fixed to a metal frame with a high modulus structural sealing material. In addition, it is known that all four circumferences of the glass plate are bonded to the metal frame with a high modulus structural sealing material (for example, SAIKAI Sho 62-8).
0981 publication).

(Problems to be Solved by the Invention) In the prior art as described above, since the structural sealing material having high adhesive strength, high modulus, high durability, high weather resistance and the like is used, the exterior material receives There is no problem with wind load being structurally transmitted to the surrounding frame materials, but on the other hand, with regard to interlayer displacement in buildings caused by an earthquake, the high modulus structural and Since the following performance is low because it is adhesively fixed with a sealing material, an in-plane and out-of-plane deformation force acts on the exterior panel by the interlayer displacement, causing damage to the exterior material such as a glass plate or causing cracks or peeling of the sealing material, Adhesive and sealing performance is deteriorated and it may cause a fall accident.Therefore, the mounting structure such as a sash releases the above load, and the high modulus There has been a problem that it is necessary to reduce the load of shear deformation that the structural sealing material receives.

(Means for Solving Problems) The present invention has been made for the purpose of improving the above-mentioned conventional problems, and includes a support frame fixed to a frame facing the outdoor side of a building, In a method of constructing an attachment frame fixed to the support frame via a bracket and an exterior panel in which an exterior material is adhesively fixed to the attachment frame, a high-modulus is provided between the attachment frame and the exterior material at a central portion of each side thereof. Provided is a method for constructing an exterior panel in which the structural sealing material is filled in the rest with a low modulus structural sealing material.

Here, regarding the structural sealant having both high and low modulus used in the present invention, the one having a large tensile stress at a deformation rate of 50% at a boundary of 2.5 kg / cm ² is usually a high modulus, and the following are low modulus. However, a high modulus of about 4.5 kg / cm ² or more, preferably about 9.5 kg / cm ^{2 and} a low modulus of about 2.5 kg / cm ² or less, preferably about 1.4 kg / cm ² are used. Is what
The structure that uses high- and low-modulus structural sealant together is that the high-modulus structural sealant is located at the center of each side of the exterior material along the length of each side, and the rest is a low-modulus structural sealant. There are methods such as a method of filling a sealing material to achieve adhesive fixation, a method of alternately filling high and low modulus, and a method of combining these. The range of use of high modulus structural sealing materials is the joint depth of the sealing material that is within the allowable shear deformation rate of high modulus from the amount of interlayer displacement, and the wind in the case of low modulus structural sealing materials. The joint width is within the allowable stress from the pressure.

(Operation) In the present invention, when the exterior material and the mounting frame are bonded and fixed to each other as described above, a structural sealing material having a high modulus in the central area in the circumferential direction of the exterior material and a low modulus in the remaining portion is used. Because of the unique combination of structures, the former, which has high strength performance, mainly retains the bearing capacity of the exterior material against wind pressure load, and the latter has the following ability to absorb and absorb the portion with a large amount of interlayer displacement, and the surface that the exterior material receives. The internal force is reduced, and the performance of wind pressure and earthquake resistance is fulfilled. Other configurations that use both high and low moduli produce similar effects even in a horizontal portion, for example.

(Example) Hereinafter, the Example of this invention is described based on drawing.

Fig. 1 is a general view of the building where the cubic is not visible outside the room, Fig. 2 is a front view of the exterior panel for explaining the interlayer displacement, and Fig. 3 is a perspective view of the glass panel seen from the back side where the mounting bracket is omitted. FIGS. 4A and 4B are cross-sectional views of the attachment frame and the glass plate which are partially omitted, and FIGS. 5A and 5B are side views showing the adhesion between the glass plate and the attachment frame in another embodiment. It is shown.

The outer wall of the building 1 shown in FIG.
A glass panel 6 adhered to a mounting frame 3 to be described later by using a structural sealing material is attached to the supporting frames 5 and 5 ″ arranged in the body, and the caulking material 10 is placed in the butt gap of the glass plate 2. The screen is made of smooth glass that does not show the cubic or frame material filled with

In the present invention, the exterior material of the exterior panel is, for example, 1500 mm long and 15
Using a glass plate 2 with a size of 00 mm and a thickness of 8 mm, thoroughly clean the upper, lower, left and right edges of the plate and the attachment surface of the mounting frame 3 having rigidity, and apply the primer to the cleaning surface. After that, the mounting frame 3 is adhered to the upper and lower edges or the left and right edge portions 2 side of the glass plate 2 or the upper and lower and left and right edge portions 4 sides with a structural sealing material to form a panel. The adhesive joint is the displacement amount of "The wall should not fall off with the interlayer displacement of 1/150 of its height" specified in Ministry of Construction Notification No. 109, that is, the interlayer displacement when the load P shown in Fig. 2 acts. The amount is
The support frame 5 is moved by 5 mm along the upper and lower frames 4 in the direction of the support frame 5'shown by the chain double-dashed line, and the mounting frame 3 fixed to the support frames 5 and 5 "also follows. It suffices that the displacement of the sealing material is absorbed by the joint deformation and the glass plate 2 and the joint material to be adhered are not hindered. This is a method in which the shear deformation ratio of the joint with respect to the amount of interlayer displacement falls within the allowable value. The structural sealing material used in the examples is a high modulus structural sealing material having a tensile stress of 9.5 kg / cm ² and an allowable shear deformation rate of 10% when the deformation rate is 50%. Material 7'and a low modulus structural with a tensile stress of 1.1 kg / cm ² at a deformation rate of 50% and an allowable shear deformation rate of 40%.
An example using the adhesive 7 as a sealing material is also shown.

Calculating the dimensions from the interlayer displacement of 1/150 of the height mentioned above and the allowable shear deformation rate of each adhesive joint material used, the joint depth e shown in Fig. 4 is 20 mm, and its length is shown in Fig. 3. As shown in FIG. 3, a high modulus adhesive 7'is used in the range of about 370 mm in the center distribution of the mounting frame 3, and a low modulus adhesive 7 is used for the remaining portion, and the joint adhesive width f of the glass plate 2 is The expected wind pressure at the height above the ground is calculated based on the statutory formula, and the maximum line load applied to the glass plate 2 to secure the bonding area by the calculated wind pressure and the low modulus adhesive 7 Calculated from the allowable stress value and set to 12.5 mm.

Glass panel 6 panelized for each dimension described above
After a curing period sufficient to obtain sufficient adhesive strength, the support frame 5, 5 ″ that is fixed to the frame 4 is mounted on the mounting frame 3 through a bracket (not shown) attached to the mounting frame 3. Next to the glass panel 6 supported by the side mounting frames 3, another glass panel 6 having the mounting frames 3 on the left and right sides is arranged, and each mounting frame 3 attached to the glass plate 2 is adjacent. In order to adhesively support the glass plate 2, the backup material 9 is inserted into the gap between the glass surface and the mounting frame 3 after being mounted on the supporting frames 5 and 5 ″, and the adhesive materials 7 and 7 ′ are filled therein. As for the joint size to be filled at these sites, the adhesive 7 ′ with a high modulus is distributed to the center of the mounting frame 3 in the longitudinal direction of about 370 mm, and the adhesive 7 ′ with a low modulus is used for the other parts.
Is used in combination. On the other hand, in the case of the glass panel 6 in which the mounting frames 3 are adhered to the four edges of the glass, each of them can independently fix and support the glass, and in both cases, a low modulus is provided in the gap between the abutting points of the glass end faces. A type of caulking 10 is filled.

Next, after the curing period required for the field-filled high- and low-modulus adhesives 7 and 7'and the caulking material 10, the performance of the adhesives 7 and 7'and the caulking material 10 against deformation, that is, against interlayer displacement, is confirmed. Each of the deformation recovery performance, the out-of-plane displacement of the glass plate 2 as the exterior material due to the wind pressure, and the watertight performance of the sealing material were checked after the history of these. First, when the interlayer displacement amount of 10 mm is applied to the skeleton 4, the displacement absorption property becomes 88% for sliding and 12% for locking, and the maximum shear joint deformation of each adhesive 7 ', 7 in that state is measured and the deformation rate is calculated. When displayed, the high modulus adhesive 7'is 8% and the low modulus adhesive 7 is 35%, which is within 10% and 40% or less of the allowable value of each. Next, the calculated value is ± 340 kg /, which corresponds to the wind pressure at a height of 150 m above the ground.
The maximum expansion and contraction joint deformation rate at the center of each side in m ² is 8% when compressed and 12% when pulled, which is slightly higher than the conventional deformation rate of 5% at the entire circumference high modulus, but at the entire circumference. It is less than half of 25% when bonded with low modulus, which is a value that can be used in practice. Furthermore, the watertight state was visually confirmed with a pulsating wind pressure of 200 kg / m ^{2 and} a water spray amount of 4 l / m ² , and no abnormality was observed.

As another embodiment, for example, a horizontal member is used at a position where the displacement amount is the same at any position, such as a horizontal displacement, and as shown in FIG. 7'may be arranged and filled, and in order to facilitate shear deformation as shown in (b), holes are arranged in the adhesive 7'and the adhesive 7 is filled in the holes. It is also possible to reduce the displacement of tension and compression due to the high modulus performance, and it is also possible to adjust the amount of deformation depending on the combination of the pitch and size of the holes.

(Effect of the Invention) According to the present invention, between the mounting frame and the exterior material, a structural sealing material having a high modulus is provided at the center of each side length direction, and a structural sealing material having a low modulus is provided at the remaining portion. By filling the material, with respect to earthquake resistance, compared with the conventional mechanism that absorbs complicated interlayer displacement using only high modulus, since the displacement is absorbed by low modulus, the mounting member can have a simple structure. This is because the external force caused by interlayer displacement, such as the glass plate, has a small inner surface force, which leads to the prevention of breakage and falling, and the high-modulus adhesion to the central area of the peripheral edge of the glass, which also imposes a heavy burden on wind pressure that requires high modulus performance. By using the material, it has sufficient durability and has excellent effects on earthquake resistance and wind pressure resistance.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a schematic view of a building in which the upright is not shown outdoors, FIG. 2 is a front view of an exterior panel for explaining interlayer displacement, and FIG. 3 is a mounting bracket. A perspective view of the glass panel seen from the back side, which is omitted, a cross-sectional view of the attachment frame and the glass plate, which is partially omitted, is shown in FIG. 4, and (a) and (b) of FIG. It is a side view which shows adhesion | attachment of a board and a mounting frame. 2 ... glass plate, 3 ... mounting frame, 4 ... frame, 5, 5 ', 5 "... support frame, 6 ... glass panel, 7,7' ... adhesive

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 62-42611 (JP, U) Sho 60-108617 (JP, U)

Claims (1)

[Claims] 1. A method of constructing a support frame fixed to a frame facing the outdoor side of a building, an attachment frame fixed to the support frame via a bracket, and an exterior panel in which an exterior material is adhesively fixed to the attachment frame. In above, between the mounting frame and the exterior material, a high modulus structural sealing material is filled in the central portion of each side length direction thereof, and a low modulus structural sealing material is filled in the remaining portion. How to install exterior panels.