JP4901378B2 - Laminated glass support structure - Google Patents

Description

  The present invention relates to a laminated glass support structure, and in particular, two glass plates such as tempered glass and double-strength glass are bonded via an interlayer film made of polyvinyl butyral (PVB) or ethylene-vinyl alcohol copolymer (EVA). The present invention relates to a laminated glass support structure for supporting a fixed laminated glass on a predetermined support portion.

  In recent years, there have been an increasing number of examples in which buildings are constructed with a highly transparent outer wall by supporting a large number of glass plates without using sashes, as represented by the DPG (Dot Point Glazing) construction method. .

  In addition, laminated glass is frequently used as a glass plate used in the DPG construction method in order to ensure safety or to increase a glass screen usage method in which a sealing material is not applied to the joint.

  In addition, in the DPG construction method, as represented by Tenpoint (Asahi Glass Co., Ltd .: trade name), a loture (special hinge bolt), which is a glass plate support component, is set on a glass plate that has been countersunk. Accordingly, the surface of the glass plate is often finished to be flat (flat surface), and the merits such as the design property and the accumulation of dust are widely accepted.

  Although there are many advantages of the flat surface, a plate thickness needs to be equal to or greater than a certain thickness in order to perform countersink processing, and if the plate thickness is insufficient, there is a problem in strength. Although the countersink processing frequently used is a countersink having a countersunk depth of 5 mm, in the experimental results, the thickness of the glass plate (thickness defined by JIS, also called “nominal thickness”). JIS R3202 for float glass, JIS R3206 for tempered glass, and JIS R3222 for double-strength glass.The unit is expressed as “mm”. In use, it has been reported that there is a problem with strength. For this reason, the minimum plate thickness of the glass plate was determined from the countersink processing conditions even when 10 mm was not required in terms of strength.

  In addition, from the viewpoint of safety, laminated glass is often used, but in the case of laminated glass, this tendency becomes more apparent. That is, the laminated glass has a strength close to the total thickness of the two glass plates, but due to the limitation of countersink processing, the glass plate thickness on one side cannot be made 10 mm or less, and the design wind pressure When the thickness is small, an excessive plate thickness structure is always required.

  In addition, in the DPG construction method, Patent Document 1 discloses an example in which a single glass plate is provided with a through hole having a countersunk portion and a support member is attached to the through hole.

  Furthermore, Patent Document 2 and Patent Document 3 disclose examples in which the DPG construction method is applied to laminated glass. That is, in Patent Document 2, a support member is attached by providing a hole penetrating both the two glass plates constituting the laminated glass. On the other hand, in Patent Document 3, a through hole having a countersunk portion is provided only in one glass plate, a hole is not formed in the other glass plate, and a support member is attached to the through hole provided in one glass plate. The supporting member is attached to the housing using the laminated glass manufactured in the above state.

  However, since any of these methods requires the provision of a countersink, the thickness of the glass plate on the side where the countersink is to be provided must be a certain value (10 mm or more) in order to ensure a predetermined strength. It was uneconomical.

On the other hand, Patent Document 4 is proposed as a method for solving the disadvantage that the strength in the out-of-plane direction is weakened by the countersink drilling for the load from the out-of-plane direction such as wind pressure load. ing. In Patent Document 4, both the outer side glass plate and the inner side glass plate constituting the laminated glass are not countersunk holes, but straight holes are made to coincide with each other, and only the inner side glass plate is tightened with a tightening member and a nut. The entire laminated glass is supported by tightening and clamping.
Japanese Patent Laid-Open No. 5-179739 JP-A-5-214781 JP-A-6-322867 Japanese Patent No. 3408168

  However, Patent Document 4 positions the support member with respect to the laminated glass with reference to the straight hole of the inner side glass plate, and between the straight hole of the outer side glass plate and the support member (the flange portion of the tightening member). Due to the structure in which the gap is filled with the sealing material, the eccentricity between the straight hole of the external glass plate and the support member (the flange portion of the tightening member) can be easily seen from the outside, which is not preferable in appearance.

  Patent Document 4 is a structure in which both the weight of the laminated glass and the load in the out-of-plane direction of the glass are supported only by the inner side glass plate. Therefore, the thickness of the inner side glass plate must be a predetermined value or more. The thickness of the side glass plate and the inner side glass plate may become unbalanced.

  The present invention has been made in view of such circumstances, and can support the weight of the laminated glass and the load in the out-of-plane direction with a balance between the outer glass plate and the inner glass plate, and the outer glass plate and the support. It aims at providing the laminated glass support structure which can construct | assemble the flat surface excellent in the external appearance which is not eccentric with a member.

The invention according to claim 1, in order to achieve the object, a laminated glass obtained by adhering the external side glass plate and the inner side glass plate in the middle layer, the corner portion of the laminated glass In the laminated glass support structure in which the laminated glass is fixed using the opened mounting straight hole,
In the laminated glass, the straight hole is processed in both the outer side glass plate and the inner side glass plate, and the straight hole is at the same position in the laminated glass surface, and the hole diameter of the straight hole in the outer side glass plate is It is larger than the hole diameter of the straight hole of the inner side glass plate, and is processed so that both hole centers coincide with each other, the straight hole of the outer side glass plate is substantially the same thickness as the outer side glass plate, and A buffer member made of annular aluminum having an outer peripheral portion inscribed in the straight hole of the external glass plate is provided, and a support bolt component is installed inside the buffer member, and the support bolt component contacts the buffer member. It has a screw part that is freely penetrated through the straight hole of the head part and the inner side glass plate, and a nut is screwed into the screw part so that the inner side glass plate is supported by the support bolt via the buffer member. It is characterized by being clamped by the part of the head and the nut.

  According to invention of Claim 1, while providing a straight hole in both the external side glass plate and internal side glass plate which comprise a laminated glass, a buffer member and a support bolt on the basis of the straight hole of an external side glass plate Since the component is attached, the center of the straight hole of the external glass plate and the head of the support bolt component coincide. As a result, the appearance of the laminated glass is not impaired, and the weight of the laminated glass is supported by the external glass plate because it has a predetermined gap between the straight hole of the internal glass plate and the fastening bolt. Since the displacement in the out-of-plane direction of the glass plate is supported by the inner glass plate, these loads can be shared and supported by the outer glass plate and the inner glass plate. Therefore, it is possible to balance the thicknesses of the outer glass plate and the inner glass plate, and the same thickness can be obtained. From the viewpoint of strength, it is preferable to use tempered glass or double-strength glass as the glass plate constituting the laminated glass, and examples of the intermediate film include PVB and EVA films.

  Moreover, in this invention, the plate | board thickness of the glass plate to be used is 4 mm, 5 mm, 6 mm, and 8 mm, and the laminated glass by the combination of these plate | board thickness can be used. Thereby, it is possible to provide a flat surface with a thin plate thickness that could not be handled by the prior art. Conventional lotures have a countersink in order to make the surface flat, and a glass plate thickness of 12 mm (10 mm at minimum) is required for this countersink. Therefore, the use of laminated glass is increasing. Depending on the use conditions, a plate thickness of up to 10 mm is often unnecessary. In such a case, it is very effective. In addition, when the facade is constructed with a glass plate by the DPG construction method, the thickness of the glass plate is specified from the viewpoint of its strength (for example, 10 mm or more), but glass that does not require such a high strength. Even if glass plates having a thickness of 8 mm or less are used for glass interior items such as handrails, glass signboards, and glass ornaments, there is no problem in strength. For this reason, the laminated glass support structure of the present invention can be applied particularly effectively to interior parts used in such applications.

  According to a second aspect of the present invention, in the first aspect, the buffer member is an inner glass plate formed by a difference between a diameter of the straight hole of the outer glass plate and a diameter of the straight hole of the inner glass plate. It has a bottom that covers the intermediate film side surface, and the head of the support bolt is brought into contact with the bottom.

  According to the invention described in claim 2, since the bottom portion of the buffer member is supported by the head of the support bolt component inserted from the surface side of the external glass plate, the buffer member is used as the straight hole of the external glass plate. There is no need to fix it by bonding. Furthermore, when the intermediate film is sandwiched and tightened with a fixing nut via a buffer member, the holding performance when the glass is broken is improved.

  According to a third aspect of the present invention, in the first or second aspect, an elastic cushioning material is disposed between the bottom portion of the cushioning member on which the head of the support bolt contacts the inner glass plate. An elastic cushioning material is disposed between the inner glass plate and the fixing nut.

  According to the third aspect of the present invention, the use of the elastic cushioning material makes it possible to reduce the generated stress of the glass plate. Therefore, it is possible to cope with a larger glass plate and to meet a higher wind pressure condition. Correspondence becomes possible.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the screw portion of the support bolt component is swingably connected to the head of the support bolt component. It is said.

  According to the fourth aspect of the present invention, since the generated stress of the glass plate can be reduced by using the screw portion having the swing mechanism, it is possible to cope with a larger size glass plate, It is possible to cope with wind pressure conditions.

  According to the laminated glass supporting structure according to the present invention, the weight of the laminated glass and the load in the out-of-plane direction can be supported in a balanced manner by the outer side glass plate and the inner side glass plate. Laminated glass composed of a glass plate can be suitably used. In addition, the straight hole in the external glass plate does not require clearance to absorb manufacturing errors, so the elastic sealing material required in the prior art is unnecessary, improving workability and neat design. A high-quality glass wall surface can be realized, and a flat surface excellent in appearance with no eccentricity between the external glass plate and the support member can be constructed. Furthermore, since no sealing material is required for the straight holes, contamination of the glass surface due to the sealing material can be prevented, and there is no concern about chemical reaction with the laminated glass interlayer film.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the configuration shown in the embodiments, and various modifications can be made without departing from the spirit of the present invention.

  FIG. 1 is a perspective view showing an example in which the laminated glass support structure according to the embodiment is applied to a glass handrail. A glass handrail 10 shown in the figure is provided along a concourse passage 12 of a subway, and includes a bar-shaped handrail body 14 and a plurality of handrail bodies 14 disposed along the passage. It is comprised from the pillars 16, 16 ... and the glass panel 18 arrange | positioned along these pillars 16, 16 .... The glass panel 18 is a laminated glass described below, and this laminated glass is supported by the pillar 16 via the support structure of the embodiment.

  FIG. 2 is a cross-sectional view of the laminated glass constituting the glass panel 18, and shows a cross-sectional view of the first embodiment of the laminated glass support structure in the straight hole of the perforated tempered glass.

  In FIG. 2, the code | symbol 1 is an outer side glass plate, and the code | symbol 2 is an inner side glass plate. The external glass plate 1 is formed with a straight hole 1A having a relatively large diameter in the single external glass plate state. In addition, the inner side glass plate 2 is formed with a straight hole 2A having a smaller diameter than the straight hole 1A of the outer side glass plate 1 in the single state of the inner side glass plate. Reference numeral 3 denotes an intermediate film such as EVA, and the outer side glass plate 1 in which the straight hole 1A is formed and the inner side glass plate 2 in which the straight hole 2A is formed are bonded and integrated through the intermediate film 3. ing. The outer side glass plate 1 and the inner side glass plate 2 are manufactured into a laminated glass by combining the centers of these straight holes 1A and 2B. And the cyclic | annular (or hollow cylindrical shape) buffer member 4 is inserted in the straight hole 1A of the external side glass plate 1 manufactured by the laminated glass from the surface side (outside) of the external side glass plate 1 without gap.

  In the embodiment, as a manufacturing procedure, first, the inner glass plate 2 is placed on a table, and then the intermediate film 3 is placed on the upper surface of the inner glass plate 2. Here, the intermediate film 3 is cut according to the outer shape of the inner glass plate 2. Next, the outer glass plate 1 is placed on the upper surface of the intermediate film 3. Next, the intermediate film 3 on the surface of the inner glass plate 2 is cut through the straight holes 1A in accordance with the shape of the straight holes 1A of the outer glass plate 1, and thereafter, the laminated glass is manufactured.

In the factory or the field, the material of the buffer member 4 fitted into the straight hole 1A of the external glass plate 1 is aluminum .

  A support bolt component 5 having a head portion (a collar portion) 5 </ b> A having the same outer diameter as the inner diameter of the buffer member 4 is inserted into the buffer member 4 from the surface side of the external glass plate 1. Since the outer diameter of the head 5A of the support bolt component 5 matches the inner diameter of the buffer member 4, the outer glass plate 1, the buffer member 4, and the support bolt component 5 are configured with a minimum clearance. . Moreover, since the head 5A and the buffer member 4 of the support bolt part 5 are the same thickness as the outer side glass plate 1 as a whole, the surface of the outer side glass plate 1 is a flat surface.

  Since the laminated glass undergoes the manufacturing process as described above, the manufacturing tolerances of the outer glass plate 1 and the inner glass plate 2, and the outer glass plate 1 and the inner glass plate 2 are bonded via the intermediate film 3. Manufacturing error occurs. In the embodiment, this manufacturing error is absorbed by the gap between the support bolt component 5 and the straight hole 2 </ b> A of the inner glass plate 2. Therefore, the body part 5 </ b> B of the support bolt component 5 is in a state of being free to penetrate through the straight hole 2 </ b> A of the inner side glass plate 2.

  As a prior art of a laminated glass support structure using a straight hole, Patent Document 4 described above can be raised. In Patent Document 4, since the support portion of the glass plate is based on the straight hole of the inner side glass plate on the indoor side, the production error of the laminated glass is caused by the straight hole of the interposed member and the outer side glass plate on the outdoor side. It occurs in the gap. For this reason, in this conventional technique, the gap between the interposed member and the straight hole portion of the external glass plate must be filled with an indeterminate sealing material.

  As another prior art, Japanese Utility Model Publication No. 6-74712 can be cited. It is also a laminated glass by straight hole processing, and it is supported by the indoor side glass as in the case above, so the production error of the laminated glass is a silicone rubber packing installed between the hole on the outside glass and the flange. Is absorbed by.

  In the laminated glass support structure of the embodiment, the gap between the straight hole 1 </ b> A of the outer glass plate 1 and the buffer member 4 and between the buffer member 4 and the head 5 </ b> A of the support bolt component 5 is substantially a gap. As a result, a laminated glass (glass handrail panel 18) having an excellent appearance design can be provided. In this respect, the laminated glass support structure of the embodiment is essentially different from the above-described prior art. Moreover, in the laminated glass support structure of embodiment, since there is no elastic sealing material around 1 A of straight holes of the external side glass plate 1, it is excellent in workability and can prevent the contamination of the glass wall surface caused by the silicone sealing material. .

  Further, depending on the material of the sealing material, a chemical reaction with the interlayer film 3 of the laminated glass may occur, and the phenomenon that the interlayer film 3 changes to yellow may occur. However, in the laminated glass support structure of the embodiment, such a concern There is nothing.

  Furthermore, in the laminated glass support structure of the embodiment, the external glass plate 1 supports the weight of the laminated glass, and the internal glass plate 2 bears loads such as wind pressure. Compared with the prior art, the generation of stress on the glass plate can be reduced.

  On the other hand, the support bolt component 5 is tightened by tightening the fixing nut 6 into the screw portion 5C, thereby fastening the inner side glass plate 2 with the head 5A of the support bolt component 5 and the fixing nut 6 via the buffer member 4. Can be fixed. Therefore, the weight of the laminated glass is transmitted to the support bolt component 5 through the buffer member 4 inscribed in the straight hole 1 </ b> A of the external glass plate 1. In order to increase the water-stopping property, an elastic sealing material may be filled in the gap between the straight hole 2 </ b> A of the inner glass plate 2 and the main body portion 5 </ b> B of the support bolt component 5. A donut-shaped cushioning material 7 having the same diameter as that of the fixing nut 6 is interposed between the inner glass plate 2 and the fixing nut 6. As the buffer material 7, a plastic such as polyacetal is suitable.

  FIG. 3 is a cross-sectional view showing a second embodiment of the laminated glass support structure. The same or similar members as those in the laminated glass support structure shown in FIG. To do.

  The laminated glass support structure shown in FIG. 3 includes the intermediate side glass plate including the intermediate layer 3 by the buffer member 4 and the fixing nut 5 cut by the diameter of the straight hole 2A of the inner side glass plate 2. This is an example in which 2 is sandwiched and fixed. With this configuration, it is possible to improve the holding performance when the glass plate is broken.

  FIG. 4 is a cross-sectional view showing a third embodiment of the laminated glass support structure. The same or similar members as those in the laminated glass support structure shown in FIG. To do.

  The laminated glass support structure shown in FIG. 4 has a donut-shaped elastic cushioning material 7 having the same diameter as that of the fixing nut 6 interposed between the inner side glass plate 2 and the fixing nut 6, and the buffer member 4 and the inner side glass plate. 2, an example is shown in which an inner glass plate 2 is sandwiched and supported using the elastic buffer material 7 by interposing a donut-shaped elastic buffer material 7 having the same diameter as the buffer member 4. As the elastic buffer material 7, silicone rubber having a rubber hardness of about 60 degrees is preferably used. Since the support bolt component 5 can be rotated minutely by the action of the elastic buffer material 7, the stress concentration in the straight hole 1A can be relaxed, and a larger glass size can be accommodated.

  Regarding the wind load, the outer side glass plate 1 and the inner side glass plate 2 bear the load corresponding to the plate thickness. Therefore, the thickness of the outer glass plate 1 and the inner glass plate 2 is 4 mm, the diameter of the straight hole 1A is 28 mm, the diameter of the straight hole 2A is 20 mm, the glass size is 1300 mm square, and the design wind pressure is 2000 Pa. FEM analysis was performed. As a result, it was found that it was possible to cope sufficiently.

  FIG. 5 is a cross-sectional view showing a fourth embodiment of the laminated glass support structure. The same or similar members as those in the laminated glass support structure shown in FIG. To do.

  The laminated glass support structure shown in FIG. 5 significantly reduces the stress generated in the laminated glass by using the support bolt component 8 having a swing mechanism as the support bolt component. This support bolt component 8 is composed of a head 8A and a screw portion 8B of the support bolt component 8 as separate components, and a spherical portion 8D of the screw portion 8B is shaken in a spherical recess 8C formed inside the head 8A. It is configured by fitting it freely.

Perspective view of laminated glass support structure applied to handrail Sectional view showing the laminated glass supporting structure shown in FIG. 1 and showing the first embodiment Sectional drawing which shows 2nd Embodiment of a laminated glass support structure Sectional drawing which shows 3rd Embodiment of a laminated glass support structure Sectional drawing which shows 4th Embodiment of a laminated glass support structure

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... External side glass plate (perforated tempered glass), 2 ... Internal side glass plate (perforated tempered glass), 3 ... Intermediate film of laminated glass, 4 ... Buffer member, 5 ... Support bolt component, 6 ... Fixing nut, 7 ... (elastic) cushioning material, 8 ... support bolt with swing mechanism, 9 ... O-ring

Claims (4)

Laminated glass formed by bonding an outer glass plate and an inner glass plate with an intermediate film, and the laminated glass is fixed by using a mounting straight hole opened at the corner of the laminated glass In structure
In the laminated glass, the straight hole is processed in both the outer side glass plate and the inner side glass plate, and the straight hole is at the same position in the laminated glass surface, and the hole diameter of the straight hole in the outer side glass plate is It is larger than the hole diameter of the straight hole on the inner side glass plate, and processed so that both hole centers match.
The straight hole of the outer glass plate is provided with a buffer member made of annular aluminum that is substantially the same thickness as the outer glass plate and has an outer peripheral portion that is inscribed in the straight hole of the outer glass plate,
A support bolt component is installed inside the buffer member, and the support bolt component has a head portion that comes into contact with the buffer member and a threaded portion that is freely penetrated through the straight hole of the inner glass plate,
A laminated glass support structure, wherein a nut is screwed onto the threaded portion, whereby an inner side glass plate is fastened and fixed by a head of a support bolt component and the nut via a buffer member.   The buffer member has a bottom portion covering the intermediate film side surface portion of the inner glass plate caused by a difference between the diameter of the straight hole of the outer glass plate and the diameter of the straight hole of the inner glass plate. The laminated glass support structure according to claim 1, wherein a head of the support bolt is brought into contact with the laminated glass.   An elastic cushioning material is disposed between the bottom portion of the cushioning member with which the head of the support bolt contacts and the inner glass plate, and an elastic cushioning material between the inner glass plate and the fixing nut. The laminated glass supporting structure according to claim 1, wherein the laminated glass supporting structure is arranged.   The laminated glass support structure according to any one of claims 1 to 3, wherein a thread portion of the support bolt component is swingably connected to a head portion of the support bolt component.

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