JP2015020935A - Multiple glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a post-fitting multiple glass that is obtained by sticking a post-fitting glass on an existing window pane and applied to an opening/closing window, and has sufficient durability.SOLUTION: A hollow layer support member is composed of a base material 401 having an adhesive 402 coated or stuck on both side surfaces, a desiccant agent 404, and an oxygen absorbent 405. An existing window pane and a new post-fitting glass are stuck to each other via the base material by bonding them using the adhesive 402 coated on the side surfaces of the base material 401. A sealant fixes among edge faces, a back surface of the hollow layer support member and a surface of the existing window pane by sealing a space among them, at four sides of the new post-fitting glass.

Description

  The present invention relates to a multi-layer glass produced by bonding a newly installed retrofitted glass through a hollow layer support while using an existing window glass installed in a house or a building as it is.

  For the purpose of improving the energy saving property of houses and buildings and preventing the condensation of the window glass, a multi-layer glass having excellent heat insulation has become widespread as a window glass attached to the opening. The double-glazed glass is made by laminating two sheets of glass through a hollow layer support in the four circumferences, and enclosing a dry air layer in a space (hollow layer) surrounded by the hollow layer support and the two sheets of glass. And it is the glass which heat insulation improved compared with the single plate glass. As a matter of course, the total thickness of the double-glazed glass (the sum of the thicknesses of the two glasses and the thickness of the hollow layer support) is twice or more the thickness of the single glass plate.

As a result of the increase in the thickness of the double-glazed glass, the sash (shoji) and window frame to which the double-glazed glass is attached require a larger glass groove width than that of the single-glazed glass. It is necessary to use a shoji or window frame with a large groove width for glass. In other words, when existing shojis and window frames are made for single glass, in order to install double-glazed glass instead of single-glazed glass, double-glazed glass is used not only for glass but also for shoji and window frames. It had to be exchanged for one.

  A multi-layer glass structure having a structure that can be directly mounted on a shoji or window frame having a small glass groove width for a single glass sheet is disclosed (Patent Document 1). This is a structure in which two glass plates are simply bonded together with a sealing material, and the indoor side glass is held on the inner peripheral surface of the window frame. It would be troublesome to produce a double-glazed glass having such a structure on a double-glazed glass production line in a factory, and it would be rather expensive. Such a multi-layer window mounting structure discloses a multi-layer window mounting structure that can be attached to a single-panel glass window frame, rather than a multi-layer glass using an existing single-panel glass as it is.

On the other hand, as a method of converting a single glass sheet into a double glass while using an existing sash or window frame, there is a method of attaching the double glass to a single glass window frame through a sealing holding material (called an adapter). It is disclosed (for example, Patent Document 2). This method has been widely used since then.

  In recent years, there has been disclosed a multi-layer glass in which a new glass is pasted while using an existing single glass for a building and a method for producing the same. In Patent Document 3, a hollow layer support made of a desiccant, a spacer and a low moisture-permeable sealing material is interposed between an existing plate glass and a new plate glass, and between the existing opening fixing member and the new plate glass. Discloses a multi-layer glass fixed with a water-impermeable sealing material and a method for producing the same.

Patent Document 4 is intended to improve the durability of the multi-layer glass disclosed in Patent Document 3, and a newly installed glass plate with a spacer is disposed on an existing glass window. Disclosed is a multi-layer glass obtained by sealing the periphery of the four sides between glasses with a sealing material and a method for producing the same, and the sealing material is applied to all existing glass plates, newly installed glass plates with spacers, and spacers. The durability is improved by bonding the two surfaces of the glass plate with the spacer, that is, the side facing the existing glass plate and the facet surface to the sealing material. Patent Document 5 discloses a method for assembling a double-glazed glass that can be easily assembled without the trouble of assembling the double-glazed glass disclosed in Patent Document 3. In addition, the technique similar to the multilayer glass disclosed by patent document 4 is put into practical use (nonpatent literature 1).

JP-A-8-93340 Japanese Utility Model Publication No. 1-24313 Japanese Patent No. 4003908 JP 2012-140767 A JP 2012-148986 A Japanese Patent Publication No. 56-50618 JP-A-5-237374

ATTOCHTM Asahi Glass Co., Ltd. catalog, 2013. 01 JP http: // www.tgm-japan.com/pl3_superspacer.html

  In the multi-layer window window plate mounting structure disclosed in Patent Document 1, the multi-layer plate is mounted while being supported on the inner peripheral surface of the window frame while using the existing window frame. A multi-layer plate having a window plate attachment structure is manufactured and attached to an existing window frame, and the existing window glass is not used as it is to form a multi-layer glass. Therefore, when the existing window glass is attached, it is necessary to remove it and newly attach a multilayer board having such a window plate mounting structure, and the existing window glass is wasted.

In addition, the multi-window window plate mounting structure disclosed in Patent Document 1 has not been put to practical use. This is because, in general multilayer glass (FIG. 1) in practical use, an adhesive applied on both sides of the hollow layer support and a sealing material injected on the back side of the hollow layer support. In contrast to bonding two sheets of glass (the adhesive is often referred to as a primary seal and the sealant is referred to as a secondary seal), in the window plate mounting structure of a multi-layer window disclosed in Patent Document 1, This is considered to be due to the structure in which two pieces of glass are bonded only with a sealing material, and the long-term durability is poor. This is because there is no primary seal and only the secondary seal is applied.

Next, the method disclosed in Patent Document 2 can make use of the existing shoji or window frame as it is, but also removes the existing window glass and newly uses a sealing holding material called an adapter to newly create a multilayer glass. This is wasteful in that the existing window glass must be removed and discarded.

Here, in order to understand the background art accurately, the relationship between the window glass mounting structure and the members is shown in FIG. FIG. 2 shows a simplified structure for mounting a so-called fixed window (often referred to as a FIX window). The window glass 10 is directly attached to a window frame 20 constructed on the wall of a building. The wall part of the building to which the window frame is attached is often called the picture frame 30. In the technique disclosed in Patent Document 3, a new window glass 50 is arranged in parallel with the existing window glass 10 through the hollow layer support 40 for the fixed window, and the new window glass and the opening are provided. (Sash) It is a multi-layer glass in which the space between the fixing member (that is, the window frame 20 or the frame 30) is fixed by the sealing material 60.

On the other hand, FIG. 3 shows a mounting structure of a so-called opening / closing window (also called a movable window). As the opening / closing window, a sliding window or a raising / lowering window is generally used. In this case, the indoor window glass 11 is attached to the indoor shoji 15, the outdoor window glass 12 is attached to the outdoor shoji 16, and the shoji 15 and 16 are attached to the building wall (picture frame 30). ) Is attached to the window frame 20 attached. Usually, the shojis 15 and 16 slide along the rails 201 and 202 provided on the window frame 20. The shojis are provided with so-called doors 151 and 161, and the doors rotate and move on the rails, thereby enabling smooth opening and closing. In the structure of the open / close window, the window glass is attached to the shoji instead of being fitted into the window frame constructed on the frame, and the shoji is attached to the window frame. Therefore, when such window glass 11 and 12 is made into a multi-layer glass, in order to ensure mobility, it cannot seal between a frame or a window frame.

Patent Document 3 discloses a multi-layer glass in which a new plate glass is juxtaposed to an indoor side opening of an existing plate glass and a method for producing the same, but as is apparent from the drawings attached to the specification, The plate glass is fixed by a secondary sealant between the sash fixing member of the building. Therefore, the existing plate glass or the sash fitted with the plate glass is fixed between the sash fixing member of the building and cannot move. This is also clear from the fact that, in the scope of claims of Patent Document 3, “excludes the sliding of existing buildings and the raising and lowering window sash portion”.

Patent Document 4 presents Patent Document 3 as a prior art document from the description of the specification, and in the multi-layer glass disclosed in Patent Document 3, a gap between the edge of the novel glass plate and the ridge Since only the sealing material is filled with the seal material, there is a concern about the durability, and the purpose is to improve the durability. Therefore, like the technique disclosed in Patent Document 3, it is obvious that the technique cannot be applied to a movable sash portion such as a sliding door and a raising / lowering window of an existing building.

In addition, the techniques disclosed in Patent Document 3 and Patent Document 4 are for realizing a general multilayer glass structure while using an existing window glass. In this case, a so-called aluminum spacer having a substantially hollow rectangular cross section is used as a base material for the hollow layer support, silica gel or zeolite is enclosed as a desiccant in the hollow space, and an adhesive is provided on the side of the aluminum spacer. Of butyl rubber is applied. In addition, Patent Document 3 describes an example using a True Seal watergle seal as a hollow layer support. The structure of the water seal is not always clear, but considering information on similar seal materials, it can be considered as a resin hollow layer support having butyl rubber formed on the side surface.

The butyl rubber used as the pressure-sensitive adhesive is excellent in non-moisture permeability, but does not have sufficient adhesive strength with glass and cannot hold heavy glass alone. Therefore, in order to prevent the glass from being peeled off from the adhesive (butyl rubber) of the aluminum spacer, the space formed by the two glass facing surfaces and the back of the aluminum spacer must be sealed with a secondary sealant. It is necessary to stop and ensure strong adhesion. In addition, since it is necessary to hold the glass safely in the assembly of double-glazed glass at the site, when sealing with a secondary sealant, a setting block or sponge rubber is laid on the lower side to support the glass. Is normal.

  In addition, in the double-layer glass disclosed in Patent Document 4, as is clear from the description of the specification, the secondary sealing material must be filled from the gap between the edge of the glass with a spacer and the sponge rubber or the setting block. However, it takes time and it is unclear how the secondary sealing material is filled in the space surrounded by the spacer, the existing glass, and the glass with the spacer at the place where the setting block is located. Further, in the structure in which the small edge surface of the glass with the spacer is in contact with the setting block (or sponge rubber), it seems even impossible to fill the space with the secondary sealant. In any case, in the multilayer glass disclosed in Patent Document 4, it takes time to assemble, the secondary sealing material is not easily filled, and the durability of the multilayer glass may still be insufficient. . Patent Document 5 has almost the same technical contents as Patent Document 4 and facilitates assembly work at the construction site. However, as with the case of Patent Document 4, filling of the secondary sealing material is not as easy. There is still a concern that durability will be insufficient.

  In order to solve the above-mentioned conventional problems, the present invention is a multi-layer glass obtained by bonding a newly installed rear glass to an existing window glass via a hollow layer support, and the hollow layer support is formed on both sides. A base material having an adhesive applied or affixed to the surface (hereinafter referred to as application), a desiccant and an oxygen absorber, and the existing window glass and the newly installed rear glass through the base material , And bonded to each other with an adhesive applied on both sides of the base material, and further, the four sides of the newly installed retrofitting glass, the small edge surface, the back surface of the hollow layer support, and the existing window glass surface Disclosed is a double-glazed glass characterized in that a gap is fixed with a sealing material.

FIG. 4 shows the main part of the present invention. By adopting such a structure, it is not necessary to use the existing window glass 10 as it is and to fix it between the existing frame 30 and the window frame 20 of the building with a seal, and the newly installed rear glass 50 and the existing glass. It is possible to obtain a double-glazed glass that is fixed with the sealing material 60 only between the window glass 10 and the window glass 10. Since it is not necessary to seal between the frame and window frame of an existing building, as will be described later, open / close windows such as sliding windows and raising / lowering windows, to which the conventional technology could not be applied. Double glass can be obtained without impairing mobility. In the case of a fixed window, if circumstances permit, at least a part of the space 60a in FIG. 4 may be sealed. This is because the fixed window is not opened and closed, and no problem occurs even if it is sealed with the window frame or the frame.

Details of the hollow layer support 40 are shown in FIG. In FIG. 5A, the hollow aluminum spacer 401 is used as a base material, but an adhesive 402 is applied to the side surface instead of a pressure-sensitive adhesive such as butyl rubber that is used for ordinary double-layer glass. ing. Since an adhesive is used, the glass has excellent holding power and can be attached to an existing window glass without using a member such as a setting block or sponge rubber.

Furthermore, in the double-glazed glass of the present invention, the setting block and sponge rubber required in the prior art are not used. Since the space between the existing window glass and the surface of the existing window glass can be carefully sealed and the performance of the seal can be easily confirmed, repair can be facilitated and the reliability of the seal can be improved.

In addition to the commonly used desiccant 404 such as silica gel and zeolite, it is essential to enclose an oxygen absorbent 405 in the hollow portion 403 of the aluminum spacer. This is because not only the moisture present in the hollow layer 70 is adsorbed through the vent holes 406 but also oxygen. Moisture is absorbed to prevent dew condensation in the hollow layer, and oxygen in the hollow layer is absorbed by lowering the pressure in the hollow layer so that the existing plate glass and a new retrofit can be installed. This is because the glass is subjected to atmospheric pressure and strongly presses the hollow layer support to strengthen the adhesion. By doing so, the multi-layer glass structure according to the present invention can ensure the holding of the glass without necessarily fixing the frame or the window frame with the sealing material. Further, in order to strengthen the holding of the glass, the space between the window frame and the frame may be fixed with a sealing material, or an auxiliary fall prevention member may be used.

  As the substrate for the hollow layer support, in addition to the general aluminum spacer described above, a resin substrate such as an aluminum plate, an acrylic sheet or butyl rubber, or a nonwoven fabric impregnated with an acrylic adhesive can be used. FIG. 5B shows a hollow layer support having a structure in which a resin base material 411 is impregnated with a desiccant 414 and an oxygen absorbent 415 and an adhesive 412 is applied on both side surfaces. As the resin base material 411, a foamed resin such as silicone or EPDM can be used. In that case, it is desirable to insert a moisture barrier 416 in the middle in order to prevent moisture from diffusing into the hollow layer through the foamed resin. As the moisture barrier, aluminum foil, polypropylene film or the like can be used.

  In the present invention, it is desirable to use a resin base material or a nonwoven fabric as a base material for the hollow layer support rather than a general aluminum spacer. The present invention is characterized in that an existing window glass and a new retrofitted glass are bonded to each other with an adhesive applied to the side surface of the substrate through the substrate of the hollow layer support. When a force is applied to peel off the adhesive bond with the material, the base material is a resin or non-woven fabric, and the base material itself can be expanded and contracted to release the force. is there.

Next, FIG. 6 shows the structure of the multi-layer glass of the present invention in a case where an existing window glass is attached to a sliding sliding door for a house. In a residential sliding window, a window frame 20 is typically provided on the frame 30, the indoor window glass 11 is attached to the indoor shoji 15, and the outdoor window glass 12 is attached to the outdoor shoji 16. . Rails 201 and 202 are provided on the window frame, and doors 151 and 152 are provided on the shoji, so that the door can be opened and closed by sliding the door on the rail. The width of the shoji is about 20 mm, and an existing window glass with a thickness of about 3 to 4 mm is mounted in the center. Therefore, on both sides of the window glass, there is about 8 mm between the glass surface and the outermost surface of the shoji. There is only space. And when using the existing window glass as a multilayer glass, if the thickness of the new retrofitted glasses 51 and 52 is 3 to 4 mm, the thickness of the hollow layer supports 41 and 42 is about 4 mm or less. Therefore, it is difficult to use the hollow layer support (FIGS. 5A and 5B).

In such a case, an acrylic sheet or aluminum plate having a thickness of about 2 to 3 mm as shown in FIG. 5C is used as a base material 421, and an adhesive 422 having a thickness of about 1 to 2 mm is formed on both sides. A hollow layer support having a coated structure can be used. The desiccant 424 and the oxygen absorbent 425 may be mixed in the adhesive, but as shown in FIG. 7, the desiccant and the oxygen absorbent may be enclosed in the hollow layer. For example, by attaching a bag containing a desiccant and an oxygen absorbent to a glass surface or a hollow layer support, the existing window glass and a new retrofitted glass are bonded together, and at the same time, the desiccant and the oxygen absorbent are added. It can be enclosed in a hollow layer.

When the thickness of the shoji of the opening / closing window to which the existing window glass is attached is further reduced, the space for installing the new window glass is further limited. In such a case, a double-sided adhesive tape can be used simply. As the double-sided adhesive tape, a tape having a thickness of about 2 to 4 mm in which a pressure-sensitive adhesive is formed on both sides of an acrylic sheet or a nonwoven fabric can be used. In this case, it is only necessary to apply a double-sided adhesive tape to an existing window glass, peel off the release paper attached to the double-sided adhesive tape, and then attach a new post-installation glass. Also in this case, in order to adsorb and absorb the moisture and oxygen in the hollow layer, it is essential to enclose the desiccant and the oxygen absorbent inside the hollow layer for the reasons already described.

As an adhesive that can be used for the hollow layer support having various structures described above, an acrylic adhesive is desirable. This is because acrylic adhesives have strong adhesive strength, are difficult to peel off, and are excellent in light resistance and weather resistance. The acrylic adhesive has an adhesive strength of at least about 10 kg / cm ² at room temperature and about 1 kg / cm ² even at a high temperature of 50 ° C. or higher. And when the hollow layer support body which apply | coated the acrylic adhesive of about 1 cm width to the base material is affixed on the four circumferences of glass, when pasting glass with a length of the circumference of about 400 cm is pasted, about 400 cm ² An adhesion area can be secured. Even when a high temperature of about 50 ° C. at which the adhesive strength is reduced is assumed, glass having a weight of 400 kg can be held. Therefore, given that normal glass weighs about 10 kg to 20 kg per m ² , the acrylic adhesive has sufficient adhesive strength to hold the post-attached glass. Adhesives other than acrylic may be used, but it is essential to have sufficient adhesive strength to hold the retrofitted glass.

  The hollow layer support to which the adhesive has been applied, etc., must be bonded without interruption to the four sides of the newly installed retrofitted glass or existing window glass. This is to prevent moisture from entering from the periphery and not lower the adhesive force. As described above, an adhesive width of about 1 cm (10 mm) is sufficient, but a range of about 5 mm to 30 mm is preferable. The larger the bonding width is, the larger the bonding force is, but it is preferably about 30 mm or less from the design surface of the entire window.

In the present invention, as shown in FIG. 4, on all four sides of the newly installed retrofitted glass, the small edge surface 50 a of the retrofitted glass 50, the back surface 40 a of the hollow layer support 40, and the surface 10 a of the existing window glass 10 are sealed 60. Secure with. This is to ensure durability as a double-glazed glass and to strengthen the adhesion of newly installed retrofitted glass to the existing window glass. It will also increase safety so that people will not be hurt by hitting the mouthpiece of the new retrofit glass. As the sealing material, a material having a low moisture permeability and a large adhesive force with glass is desirable, but a general polysulfide-based or silicone-based sealing material can be used. In the case of the fixed window, as described above, a sealing material may be injected into at least a part of the space 60a and fixed to the frame or the window frame.

In the present invention, it is not always necessary to fix the newly installed retrofitted glass to the window frame or the frame and the sealing material as in Patent Document 3, and the newly installed retrofitted glass, the window frame and the existing window glass as in Patent Document 4. Neither is it filled with a sealing material. The new retrofitted glass 50 may be bonded to the existing window glass 10 with an adhesive via the hollow layer support 40 and further fixed with the sealing material 60. In this case, as described above, it is essential to enclose the oxygen absorber together with the desiccant in the hollow layer 70 in order to hold the newly installed retrofitted glass strongly against the existing window glass. By doing so, part of the oxygen gas contained in the hollow layer is absorbed by the oxygen absorbent, the hollow layer is depressurized, and the force that the newly installed rear glass is pressed against the existing window glass by atmospheric pressure works. This is because the holding force increases.

As the oxygen absorbent, generally used iron powder, ascorbic acid, or the like can be used. Iron powder utilizes the property of absorbing oxygen when it is gradually oxidized under the action of moisture, and is convenient for use in the present invention (Patent Documents 6 and 7). Therefore, by the action of the iron powder, oxygen is absorbed by the action of moisture remaining in the hollow layer, and the pressure in the hollow layer can be reduced. Thereafter, oxygen is gradually absorbed when the moisture absorbed by the desiccant is released. Therefore, the oxygen absorption action of the iron powder does not end in a short period of time, the effect lasts for a long time, and the pressure in the hollow layer can be gradually reduced. As described above, the oxygen absorbent is enclosed in the hollow space of the hollow aluminum spacer together with the desiccant, kneaded into the resin base material, or placed in a breathable bag together with the desiccant and enclosed in the hollow layer. Can be used.

The amount of the desiccant may be about 5 g per liter of the hollow layer volume. This amount is sufficient for removing moisture remaining inside the hollow layer and removing moisture diffusing at the interface with the hollow layer support or glass. On the other hand, the amount of the oxygen absorbent for gradually absorbing and depressurizing the oxygen present in the hollow layer may be about 5 g per liter. In general, the oxygen absorbent capacity of oxygen absorber is about 20cc per gram, and if 5g per liter is sealed, it will eventually absorb 100cc (10%), but gradually absorb oxygen until then. This is because the pressure reducing effect of the hollow layer is maintained.

In order to reinforce the holding power of the retrofitted glass even in the movable opening / closing window, a seal may be injected into at least part of the spaces 61a and 62a in FIG. This is because as long as the sealing material is injected so as not to protrude from the shoji, opening and closing of the shoji is not hindered. Alternatively, a decorative plate may be provided between the retrofitted glass and the shoji as long as it does not hinder the opening and closing. The decorative board can be used as a support for preventing the fall of the newly installed retrofitted glass by fixing it with a shoji so as not to impair the aesthetic appearance of the entire window. The decorative plate may be provided only on the upper side, may be provided on the upper and lower sides, or may be provided on the left and right sides, as long as it can be used for preventing falling off of the newly installed retrofitted glass. It must not interfere with opening and closing.

  According to the present invention, a multi-layer glass can be easily obtained without waste using an existing window glass. Newly installed retrofitted glass only needs to be bonded and sealed to the existing window glass, so it has not been possible to convert it to double-glazing by arranging the retrofitted glass side by side. The window glass of a movable movable opening / closing window can also be made into a multi-layer glass. Since it is not necessary to use a cushioning material or a setting block at the time of construction, installation is easy. Since it is not always necessary to fix the window frame and frame with a sealant, when replacing the double-glazed glass, remove the double-glazed glass alone, regardless of the relationship with the window frame or frame. You can also.

  Further, according to the present invention, since the hollow layer of the multilayer glass is depressurized by the oxygen absorbent, the glass surface of the multilayer glass is pressed by the atmospheric pressure, the glass is hardly peeled off, and the durability is improved. To do.

It is a figure which shows the structure of a general multilayer glass. It is a figure which shows the attachment structure of a fixed window, and the structure (conventional example) of the multilayer glass using the existing window glass. It is a figure which shows the attachment structure of an opening-and-closing window (movable window). It is a figure which shows an example of the structure (main part in the case of a fixed window) of the multilayer glass by this invention. It is a figure which shows the structure of the hollow layer support body which can be used for this invention. It is a figure which shows an example of the structure (main part in the case of a sliding window) of the multilayer glass by this invention. It is a figure which shows the state which enclosed the hollow layer support body, desiccant, and oxygen absorber which can be used when a hollow layer is thin. It is a figure which shows the result of having measured the thickness change by the time passage after manufacture of the multilayer glass by this invention.

  The embodiment of the present invention is as already shown in FIGS. Further, the hollow layer support that can be used in the present invention and the mode of inclusion of the desiccant and the oxygen absorbent are also as illustrated in FIGS. Hereinafter, the present invention will be further described in detail with reference to examples.

  As shown in FIG. 6, two flat glass sheets having a width of 500 mm × a height of 800 mm × a thickness of 3 mm are attached to the outdoor shoji and the indoor shoji of a single plate sash for sliding (Tostem Duo SG), The existing window glass was used. Next, two plate glasses having a width of 480 mm × a height of 780 mm × a thickness of 3 mm were prepared, and a double-sided tape was affixed to the four circumferences with a width of 10 mm from the glass edge. Six oxygen absorbers (pouch type made by Mitsubishi Gas Chemical) (corresponding to about 6 g) are affixed to the surface of this plate glass, and 6 g of commercially available silica gel desiccant (3 in a paper bag) are also arranged in the same manner. The newly installed retrofitted glass. This newly installed retrofitted glass was affixed to the existing window glass attached to the outdoor shoji and the indoor shoji, respectively, so that the oxygen absorbent and the desiccant were on the hollow layer side. As the double-sided tape, No. 9455 (trade name: Beta Tape) manufactured by 3M Company was used. An acrylic adhesive was applied on both sides of a base material made of an acrylic nonwoven fabric, and two sheets having a thickness of about 2 mm were used. Finally, seal the gap between the rear face of the newly installed glass (end face), the back of the double-sided tape, and the existing window glass surface with a silicone sealant (KE42 manufactured by Shin-Etsu Chemical Co., Ltd.) using a caulking gun. Thus, a multilayer glass according to the present invention was produced.

In this embodiment, there is only an interval of about 7 mm between both sides of the existing window glass mounted on the single plate sash and the outermost surface (so-called icicle surface) of the single plate sash. The thickness was just enough to accommodate the 3 mm-thick new plate glass and the 4 mm-thick double-sided tape, and there was no problem in opening and closing the sliding window.

The double-glazed glass window of this example was produced in the Kanagawa Prefectural Industrial Technology Center (Shimaimazumi 705-1, Ebina City). Then, how the thickness of the double-layer glass attached to the indoor shoji was changed with time was measured in the mechanical material engineering department / precision measurement room in the center. The precision measurement chamber was kept at a constant temperature of 20 ° C. Thickness measurement is 3D coordinate measuring machine UPMC
By using 850 CARAT (manufactured by Tokyo Seimitsu Co., Ltd.), by measuring the coordinate point of the outer surface of the existing window glass and the coordinate point of the outer surface of the new window glass at the center of the multilayer glass (the point where the diagonal lines intersect) went. Since the thicknesses of the existing window glass and the new plate glass themselves do not vary, the measured change in thickness corresponds to the change in the thickness of the hollow layer.

  The thickness change of the multi-layer glass measured in this way is shown in Table 1 and FIG. As a result of measuring the change in thickness over about 8 days after the production of the multi-layer glass according to the present invention, in the initial stage after the production, there was a decrease in thickness that seems to be due to the absorption of a small amount of moisture contained in the hollow layer. Observed, and thereafter continued to observe a decrease in thickness that was attributed to the absorption of oxygen gas by the oxygen absorbent. Finally, after 8 days (11604 minutes) after the production, the thickness became 9.831 mm, and it was found that the thickness was reduced by 0.0788 mm from the thickness of 9.9099 mm immediately after the production. This means that the hollow layer thickness has decreased by about 2% from 4 mm immediately after fabrication to 3.9212 mm. As described above, in the multilayer glass of the present invention, as a result of containing not only the desiccant but also the oxygen absorbent in the hollow layer, the volume of the hollow layer continuously decreases and the window glass constituting the multilayer glass Was pressed by the atmospheric pressure toward the hollow layer support.

1, 1 ': Two sheet glasses constituting a general double-layer glass 4: Aluminum spacer constituting a general double-layer glass 6: Secondary sealing material 7 constituting a general double-layer glass: General Hollow layers 8 and 8 'in a multilayer glass: primary sealing material (adhesive) constituting a general multilayer glass
9: Desiccant constituting general multilayer glass 10, 11, 12: Existing window glass 15: Indoor shoji, 16: Outdoor shoji, 20: Window frame, 30: Frame 40, 41, 42: Hollow Layer supports 50, 51, 52: Newly installed rear glass 60, 61, 62: Sealing material, 70: Hollow layer 151, 152: Door cart, 201, 202: Rail 401, 411, 421, 431: Hollow layer support Substrate 402, 412, 422, 432: Adhesive 403: Hollow part of hollow aluminum spacer 404, 414, 424, 434: Desiccant 405, 415, 425, 435: Oxygen absorber 406: Vent, 416: Moisture barrier

Claims (2)

A double-glazed glass in which a new retrofitted glass is bonded to an existing window glass via a hollow layer support, and the hollow layer support includes a base material on which adhesive is applied or pasted on both sides. The window glass comprising the desiccant and the oxygen absorber and the newly installed retrofitting glass are bonded to each other with an adhesive applied or pasted to both side surfaces of the substrate through the substrate. A multi-layer glass characterized in that it is bonded to each other, and further, on the four sides of the newly installed retrofitted glass, its facet surface, the back surface of the hollow layer support and the surface of the existing window glass are covered with a sealing material. A multi-layer glass in which a new retrofitted glass is bonded to an existing window glass through a hollow layer support, and the hollow layer support is formed from a base material on which adhesive is applied or pasted on both side surfaces. The existing window glass and the new retrofitted glass are bonded to each other by bonding with an adhesive applied or pasted on both sides of the base material via the base material, and supporting the hollow layer A desiccant and an oxygen absorbent are enclosed in a hollow layer surrounded by a body, the existing window glass, and the new retrofitted glass, and the small side surface of the new retrofitted glass, A double-glazed glass comprising a back surface and a surface of the existing window glass covered with a sealing material.