JP2000064495A - Reinforced plate glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the wind-pressure resistance by providing holes in opposed positions near the opposed edges of a plate glass, mounting a glass support member on the holes, and arranging a reinforcing member on the plate glass by use of the support member. SOLUTION: Circular hole parts are provided near the opposed edges of a plate glass 1 such as reinforced glass, double strength glass float plate glass or the like, or the opposed four corners of the plate glass. Glass support members are mounted on the circular hole parts of the plate glass 1, respectively. Further, reinforcing members 3, 4 are arranged on the plate glass 1 through a cushioning body or elastic washer consisting of hard rubber, hard plastics or the like by use of the glass support members. According to this, the wind pressure resistance can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to reinforcing plate glass mainly used in the field of building materials.

[0002]

2. Description of the Related Art In recent years, a design of a building glass facade (elevation surface on the entrance side of a building, a glass wall surface) by a construction method called a dot point glazing that supports a plate glass at a plurality of points has been widely used. There is. this is,
This is a construction method in which a hole is formed in the vicinity of an end portion of the plate glass, a glass fixing member made of metal is attached to the glass plate through a buffer, and the plate glass is supported by the glass fixing member made of metal. With this, unlike the conventional plate glass support using a sash, a large space can be shielded without impairing the transparency of the entire surface.

However, this construction method is different from the general construction method in which the four sides of the plate glass are supported by the sash, and the structural feature is that the deformation of the four sides of the plate glass and the displacement of the center become large when wind pressure is applied. is there. Further, in the dot-point glazing construction method, the stress generated around the holes of the plate glass and the stress generated at the center of the four sides are dominant in determining the design wind pressure, and it is important how to reduce this. From this point of view, it is desirable to increase the bending rigidity of the glass sheet, but in general, only a coping method by increasing the glass sheet thickness can be considered.

[0004]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to construct a plate glass using a hole provided in the plate glass such as a dot-point-glazing structure method in the vicinity of the central portion of the edge of the plate glass. It is to reduce the generated stress and increase the wind pressure resistance strength.

[0005]

The object of the present invention is to provide a reinforcing member such as glass on one surface or by using a hole formed in the vicinity of an edge of a plate glass used in a dot point glazing construction method or the like. It is achieved by bonding to both front and back surfaces to increase the bending rigidity of the edges of the glass sheet and the wind pressure resistance.

That is, according to the present invention, holes are made at positions facing each other in the vicinity of the opposite edges of the plate glass, and glass supporting members are attached to these holes, respectively, and the glass supporting members are used. A reinforced plate glass is characterized in that a reinforcing member is provided on one side or both sides of the plate glass.

Further, in the present invention, it is preferable that the glass supporting member is attached to the hole of the plate glass by means of fitting, locking or locking. Further, in the present invention, it is preferable that a reinforcing member is provided on one surface or both surfaces of the plate glass by a joining means. According to the invention,
Increased bending rigidity of sheet glass can be realized without increasing sheet thickness and thereby increasing weight.

In the present invention, it is preferable that the plate glass has a rectangular shape, and the reinforcing member is disposed near the edge of the plate glass. Further, in the present invention, it is preferable that the plate glass has a rectangular shape, and the reinforcing member is arranged on one or more diagonal lines of the plate glass. Further, the plate glass may be tempered glass, double-strength glass, or float plate glass that has not been subjected to tempering treatment, and may be multi-layer glass or laminated glass.

Similarly, the reinforcing member may be a tempered glass, a double-strength glass, a laminated glass, or a float plate glass not subjected to a tempering treatment, or a material other than glass, which has a certain strength or more. If Further, in the present invention, the bonding surface between the reinforcing member and the plate glass is preferably bonded using an interlayer film for laminated glass (for example, polyvinyl butyral interlayer film, ethylene vinyl acetate interlayer film), or It is preferable that a cushioning member is provided on the joint surface between the reinforcing member and the plate glass.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described with reference to the drawings. FIG. 1 shows an example of a plate glass used in the present invention.
FIG. 1 is a plan view of a plate glass 1 used for a general dot-point glazing construction, in which circular holes 2 are formed in the vicinity of opposite edges of the plate glass, that is, at four opposite corners of the plate glass.
A total of 4 processings have been performed.

FIG. 2 shows an example of the configuration of the present invention.
Using the four circular holes 2 of the plate glass 1 of
This is an example in which reinforcement by No. 4 is performed. In this case, plate glass 1
The reinforcing members 3 and 4 can be arranged on one side or both sides of. Figure 3
Shows an example in which the reinforcing members 3 and 4 are reinforced on both sides of the plate glass 1, and the arrangement positions of the reinforcing members 3 and 4 are different on the front and back sides. FIG. 4 shows an example in which the reinforcing members 3 and 4 are arranged on a diagonal line of the plate glass 1 and reinforcement is performed on both sides of the plate glass 1. In FIGS. 2, 3 and 4, one reinforcing member is fixed by two holes, but it can also be fixed by three or more holes. In this case, the reinforcing effect increases as the number of holes increases.

The reinforcing members 3 and 4 used for the reinforcement should be selected according to the assumed wind pressure load or the desired reinforcing effect, and when the design wind pressure is low or the effect may be small, Ordinary plate glass having no compressive stress may be used, and when the design wind pressure is high, tempered glass having surface compressive stress, double strength glass or laminated glass is desirable. Further, the plate thickness of the reinforcing member, the greater the effect of the present invention as it is thick, but if too thick, it becomes a problem in design,
It is desirable to determine the plate thickness that is not excessive with respect to the assumed wind pressure or the required reinforcing effect.

To join the reinforcing members 3 and 4 used for reinforcement and the plate glass 1 to be reinforced, the glass support member 8 is attached to the circular holes 2 formed at the opposite positions near the opposite edges of the plate glass 1. By utilizing this, the reinforcing members 3 and 4 are arranged on one side or both sides of the plate glass 1. As this method, the glass support member 8 used in the dot point glazing construction is used, and the buffer 5 is used.
Alternatively, the reinforcing members 3 and 4 are arranged on the plate glass 1 to be reinforced through the elastic washers 6. Examples thereof are shown in FIGS. 5 and 6. In the example of FIGS. 5 and 6, the reinforcing members 3 and 4 are provided on both sides of the plate glass 1 to be reinforced, but it is not necessary to reinforce on both sides, and only one side may be used.

The shape and material of the glass support member 8 must have sufficient strength structurally (generally made of metal), and it is desirable that consideration is given to the design. The glass supporting member 8 preferably has a pin structure so as not to transmit a moment between the frame and the plate glass 1 as used in the dot point glazing construction method. Furthermore, when the plate glass 1 and the glass support member 8 are in direct contact with each other, the plate glass 1 may be broken even with a low load, and therefore, the plate glass 1 is preferably bonded via the buffer 5 as described above.

The plate glass 1 to be reinforced and the reinforcing members 3 and 4 are joined to each other at the circular hole portion 2. However, when it is necessary to further improve the effect, it is preferable to combine the items listed below. 1) As shown in FIG. 7, the interlayer film 10 for laminated glass is interposed between the reinforcing members 3 and 4 and the plate glass 1. 2) As shown in FIG. 8, a buffer 11 is interposed between the reinforcing members 3 and 4 and the plate glass 1. 3) As shown in FIG. 9, the distance between the reinforcing members 3 and 4 and the plate glass 1 is made as large as possible.

In the example of 1) above, the plate glass 1 to be reinforced by interposing the interlayer film 10 for laminated glass does not behave as a heavy plate, but the total thickness of the reinforcing members 3 and 4 is added. It works as a veneer and is intended to increase the bending rigidity more effectively. The thicker the interlayer film 10 for alignment is, the more effective it is. However, it is desirable to determine the thickness of the interlayer film 10 in consideration of the required effect of bending rigidity.

In the above example 2), the buffer body 11 is sandwiched between the reinforcing members 3 and 4 and the plate glass 1 to be reinforced, thereby increasing the moment of inertia of area.
The buffer 11 is fixed by the glass support member 8 in the circular hole 2.
This is performed by applying compressive force to the plate glass 1 and the reinforcing members 3 and 4 that are reinforced by. In this case, when the material of the buffer 11 has a large frictional force with the glass, the shearing forces are mutually transmitted, and the effect of increasing the bending rigidity is increased. Examples of the buffer 11 include hard rubber and hard plastic.

In the example of 3) above, at a position other than the periphery of the circular hole 2, between the reinforcing members 3 and 4 and the plate glass 1 to be reinforced,
The distance from the center of the plate thickness of the plate glass 1 to be reinforced to the reinforcing members 3 and 4 should be as small as possible without interposing anything other than a small buffer 13 that prevents mutual contact between the reinforcing members 3 and 4 and the plate glass 1 to be reinforced. Use a configuration that makes it larger. Thereby, the second moment of area can be increased. For this purpose, a ring or plate-shaped body 12 having a predetermined plate thickness is inserted between the plate glass 1 and the reinforcing members 3 and 4 which receive the reinforcement around the circular hole 2. Since this material cannot obtain the above effect when the plate thickness is reduced by tightening with the glass support member 8,
It is desirable that the glass sheet 1 has an appropriate rigidity and also has an effect of a buffer so that a large stress is not generated in the plate glass 1.
As these materials, aluminum or plastics such as tetrafluoroethylene and polyacetal are desirable.

[0019]

EXAMPLES The reinforcing effect of the sheet glass according to the present invention will be quantitatively described below. In this example, it is assumed that wind load or the like is applied to the plate glass, and a numerical simulation stress analysis by the finite element method was performed in the following structure.

Plate glass 1 to be reinforced as shown in FIG. 10 (rectangle 1518 mm × 1932 mm × plate thickness 12 m
In the case of m), the four points corresponding to the center of the circular hole 2 were simply supported, and a uniform distribution pressure of 250 kg / m ² was applied to the entire surface of the plate glass. The center position of the four support points was 69 mm from the end of the plate glass 1, and the pin was supported at the center of the plate thickness of the reinforcing member (using glass) 3. In the calculation, the longitudinal elastic modulus of glass and the Poisson's ratio used were 7.3 × 10 ⁵ kg / cm ² and 0.23, which are generally used, respectively.

The results of examination of the difference in effect depending on the reinforcing method will be shown below. As shown in FIGS.
The case where the reinforcing member 3 is arranged on one side of the plate glass 1 was examined. The glass support member 8 is attached to the hole of the plate glass 1 by a fitting means, and is fastened with a bolt. The reinforcing member 3 was a plate glass, and the plate width and the plate thickness thereof were 138 mm and 10 mm, respectively.

Calculations were performed using general-purpose software "MARC" developed by MARC. In this modeling, in consideration of the symmetry, 1/4 analysis uses shell elements with 4 nodes for the plate glass 1 and the reinforcing member (glass) 3 to be reinforced, and the total number of elements is 840, the total number of nodes is Is 957
The number of elements of the plate to be reinforced is 61
6, the number of nodes 667). Modeling of the joint between the pin support point 14 and the reinforcing member (glass) 3 and the plate glass 1 to be reinforced is because the purpose of this time is to change the bending rigidity.
Without performing detailed modeling, modeling was performed such that the plate glass 1 to be reinforced and the reinforcing member (glass) 3 were joined by pins.

An important point in the analysis is the contact with the reinforcing member (glass) 3 due to the deformation of the plate glass 1 to be reinforced, and the displacement of the plate glass 1 and the reinforcing member (glass) 3 to be reinforced in the out-of-plane direction. It was reproduced by setting the same amount to each other (TYING processing referred to as "MARC"). Furthermore, when considering geometrical non-linearity, it is important to set the load increment, and an incremental load (1/10 of the total load this time) that is small enough to reflect the non-linearity is set and calculated. went.

Table 1 shows the maximum stress at the center of the surface, the maximum stress at the center of the end side (maximum stress on the long side), and the reduction of the surface center displacement in the out-of-plane direction due to the reinforcing member (glass) 3. In Table 1, “with reinforcement (adhesion)” is a case where the plate glass 1 to be reinforced and the reinforcing member (glass) 3 are adhered with a strong adhesive force and 100% of the shearing force is transmitted, and the interlayer film for laminated glass 10 It is almost equal when they are glued together. This corresponds to FIG. 7, and is a case where the reinforcing member (glass) 3 and the plate glass 1 to be reinforced are integrated to increase the bending rigidity. In Table 1, “with reinforcement (heavy plate)” corresponds to FIG. 6 in which no shear force is transmitted between the plate glass 1 to be reinforced and the reinforcing member (glass) 3 and nothing is interposed between the plates. Since the reinforcing member (glass) 3 and the plate glass 1 to be reinforced act as a heavy plate, the increase in bending rigidity is relatively small compared to the former case.

In Table 1, when the reinforcing member (glass) 3 is bonded to the reinforced sheet glass 1, the maximum stress generated at the center of the edge is reduced by 47% compared to the unreinforced sheet glass. In this case, the maximum stress occurs in the center of the long side when not reinforced, but the maximum stress occurs in the center of the short side when reinforced.

When the reinforcing member (glass) 3 and the plate glass 1 to be reinforced are not bonded, the maximum stress generated at the center of the edge is reduced by 17% as compared with the plate glass not reinforced. From these, it is understood that the reinforcing member (glass) 3 has a great effect.

This time, since the case of reinforcing only one side of the front and back surfaces is examined, the effect of reinforcement (bonding) is small, but the reinforcing member (glass) is joined on the front and back surfaces. As a result, the above effects shown in Table 1 are expected.

[0028]

[Table 1]

[0029]

According to the present invention, it is possible to increase the flexural rigidity of a sheet glass, and it becomes possible to design a structure with a thinner sheet glass. In addition, a plate glass having the same plate thickness can be designed to have a greater wind pressure resistance. Further, by suppressing the large out-of-plane displacement in the dot-point-glazing construction method, it is possible to reduce the disturbance of the reflected image of the glass due to the deformation of the plate glass when the wind is strong. Similarly,
The reinforcement increases the buckling resistance of the glass sheet.

The feature of the present invention resides in a structure in which a reinforcing member is added by the dot-point-glazing construction method, and means for utilizing a hole drilled in glass for the construction. This allows
By utilizing the holes in the glass, which are indispensable for the dot-point glazing method, it is possible to join the reinforcing members and increase the bending rigidity of the edges of the sheet glass.

The present invention is mainly specialized in the use of the dot-point-glazing construction method. One is that existing circular holes can be used, and the other is that glass is used at the time of construction. This is because it is not necessary to consider the influence of the increase in plate thickness at the edges. That is, in the normal construction method, since the glass edge is incorporated in the sash, when the plate thickness of the glass edge becomes large as in the present invention, the sash needs to be increased, but in the case of the dot point glazing construction method This is because there is no sash, and it is unlikely to be affected by the increase in plate thickness at the edge of the plate glass.

[Brief description of drawings]

FIG. 1 is a plan view of a plate glass with holes used in the present invention.

FIG. 2 is a plan view of a reinforced sheet glass showing an arrangement of reinforcing members according to the present invention.

FIG. 3 is a plan view of a reinforced sheet glass showing an arrangement of reinforcing members according to the present invention.

FIG. 4 is a plan view of a reinforced sheet glass showing an arrangement of reinforcing members according to the present invention.

FIG. 5 is a schematic cross-sectional view of a joined portion of sheet glass reinforced by using circular holes according to the present invention.

FIG. 6 is a schematic cross-sectional view of a joined portion of plate glass reinforced by using circular holes according to the present invention.

FIG. 7 is a schematic cross-sectional view of a joint portion of plate glass reinforced by using circular holes according to the present invention.

FIG. 8 is a schematic cross-sectional view of a joined portion of sheet glass reinforced by using circular holes according to the present invention.

FIG. 9 is a schematic cross-sectional view of a joined portion of plate glass reinforced by using circular holes according to the present invention.

FIG. 10 is a plan view of a plate glass according to an example of the present invention.

FIG. 11 is a partial cross-sectional view of a reinforced sheet glass according to an embodiment of the present invention.

[Explanation of symbols]

1: Reinforcing plate glass 2: Circular hole 3: Reinforcing member (front side) 4: Reinforcing member (back side) 5: Buffer between reinforcing member and glass supporting member 6: Elastic washer 7: For fixing glass supporting member Metal washer 8: Glass support member 8a: Fixing portion of glass support member to the body 9: Circular hole processed surface of plate glass 10: Intermediate film 11 for laminated glass: Buffer 12: Distance between reinforcing member and plate glass to be reinforced Plate-like body 13 for maintaining the following: Buffer body 14 for preventing contact between the plate glass and the reinforcing member: Pin support point

Claims (10)

[Claims] 1. A hole is made in each of the opposite positions in the vicinity of the opposite side edges of the plate glass, and a glass support member is attached to each of the holes, and the plate glass is utilized by using the glass support member. A reinforced plate glass having a reinforcing member disposed on one side or both sides thereof. 2. The reinforced plate glass according to claim 1, wherein a glass support member is attached to the hole of the plate glass by means of fitting, locking or locking. 3. The reinforced plate glass according to claim 1, wherein a reinforcing member is provided on one side or both sides of the plate glass by a joining means. 4. The reinforced plate glass according to claim 1, 2 or 3, wherein the plate glass has a rectangular shape, and the reinforcing member is arranged in the vicinity of an edge of the plate glass. 5. The reinforced sheet glass according to claim 1, 2 or 3, wherein the sheet glass has a rectangular shape, and the reinforcing member is arranged on one or more diagonal lines of the sheet glass. 6. The reinforced plate glass according to claim 1, wherein the plate glass is tempered glass, double-strength glass or float glass not subjected to tempering treatment. 7. The reinforced glazing according to claim 1, 2, 3, 4 or 5, wherein the glazing is a double glazing or a laminated glazing. 8. A reinforced plate glass according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the reinforcing member is a tempered glass, a double-strength glass, a laminated glass or a float plate glass which has not been tempered. . 9. The bonding surface between the reinforcing member and the plate glass is bonded using an interlayer film for laminated glass.
Reinforced glazing according to 3, 4, 5, 6, 7 or 8. 10. The reinforced plate glass according to claim 1, wherein a cushioning member is provided on a joint surface between the reinforcing member and the plate glass.