JP7120696B1 - fire glass screen - Google Patents

Abstract

[Problem] To construct a fire-resistant glass screen having a multi-layer glass structure by arranging a plurality of fire-resistant glasses facing each other, and to pass a fire test without requiring mullions at the joints between the fire-resistant glasses. To provide a fireproof glass screen capable of A fire-resistant glass screen (10) has a multi-layer glass structure in which two fire-resistant glasses (20A, 20B) and three fire-resistant glasses (21A to 21C) are arranged facing each other so as to form a hollow layer. is the screen. In the fire-resistant glass screen 10, the two fire-resistant glasses 20A and 20B and the three fire-resistant glasses 21A to 21C are located at the positions (joints The position of the material 16) and the position of the vertical joints between the adjacent fire-resistant glasses in the three fire-resistant glasses 21A to 21C (positions of the joint materials 17 and 18) are arranged differently in the width direction. ing. [Selection drawing] Fig. 3

Description

The present invention relates to a fire-rated glass screen of double-glazed construction.

Glass screens with double glazing (double glazing) structure, in which two sheets of glass face each other to form a hollow layer, have excellent sound insulation and heat insulation properties, making them ideal for partitioning rooms. It is often used as a partition (see Patent Document 1, for example). However, in such multi-layered glass partitions, even when used in a continuous window structure that is used by connecting multiple pieces in the horizontal direction, it is used without installing mullions in the vertical joints of the connection part in order to improve the design. It is often done.

In recent years, such multi-layer glass partitions have been used in commercial facilities such as department stores, educational facilities such as schools, medical facilities such as hospitals, transportation facilities such as stations, and large buildings such as large office buildings. There is also a demand for use in fire compartments that are sometimes provided to block fire and smoke to prevent the spread of fire. However, in order to use a glass screen in a fireproof compartment, it is necessary to pass a fireproof test stipulated by a performance evaluation agency and receive certification as a fireproof facility or a specific fireproof facility. In addition, when glass screens are used as partition walls facing fireproof compartments such as evacuation stairs and passages, they are certified as 1-hour fireproof partition walls with 1-hour flame and 1-hour heat insulation performance. There is a need.

Here, fire prevention equipment is equipment installed at an opening to prevent the spread of fire in a building as stipulated in the Building Standards Act. It has flame-shielding performance, has passed the test specified by the performance evaluation organization, has received performance evaluation, and has been certified by the Minister of Land, Infrastructure, Transport and Tourism. And among the fire prevention equipment, it has the flame shielding performance to shield the non-heated side for 1 hour even if it is exposed to flames, passed the test stipulated by the performance evaluation organization, received the performance evaluation, and received the Minister of Land, Infrastructure, Transport and Tourism Those that have obtained certification are called specific fire prevention equipment.

In order to pass the fire test as described above, the conventional double-glazed glass screen cannot pass the fire test simply by using fire-resistant glass as the glass plate.

FIG. 13 shows a front view of a fire-resistant glass screen 100, which is an example of a structure in which the glass plates of such a conventional double-glazed glass screen are replaced with fire-resistant glass.

As shown in FIG. 13, the fireproof glass screen 100 comprises a frame composed of left and right vertical frames 111 and 112, an upper frame 113, and a lower frame 114, and four fireproof glass screens fixed by this frame. It is composed of glasses 120A, 120B, 121A and 121B. Note that the fire-resistant glasses 121A and 121B are not shown in the front view of FIG. 13 because they are arranged behind the fire-resistant glasses 120A and 120B, respectively. A joint material 116 is provided between the fire-resistant glass 120A and the fire-resistant glass 120B. On the back side, joint material 117 is provided between fire-resistant glass 121A and fire-resistant glass 121B, but is not shown in FIG.

FIG. 14 shows a cross-sectional view of the conventional fireproof glass screen 100 shown in FIG. 13 taken along line EE. Note that FIG. 14 shows an end view showing only the end face of the cut portion. Also in the following description, in order to make the description easier to understand, when referring to a cross-sectional view, an end view of a cut surface is shown and described.

Referring to FIG. 14, in fireproof glass screen 100, four sheets of fireproof glass 120A, 120B, 121A, 121B are arranged between left and right vertical frames 111, 112 so as to form hollow layers. It can be seen that it has a layered glass structure. A joint material 116 is provided between the fire-resistant glass 120A and the fire-resistant glass 120B, and a joint material 117 is provided between the fire-resistant glass 121A and the fire-resistant glass 121B. The joint materials 116 and 117 are made of flame-retardant silicone moldings, for example.

FIG. 15 shows how the conventional fireproof glass screen 100 shown in FIGS. 13 and 14 was subjected to a fireproof test. In the fire resistance test, one side of the specimen is heated by applying a flame to it in a heating furnace according to a predetermined method, and the non-heated side of the opposite side is evaluated for flame insulation. And, in the evaluation method of this fire prevention test, "Visually observe whether or not flames and cracks through which flames pass are generated on non-heated surfaces. Here, cracks through which flames pass are defined as the or the inside of the heating furnace can be seen.”, and the evaluation criteria are defined as “No damage such as cracks or gaps through which flames can pass.”

However, in the conventional fireproof glass screen 100 shown in FIGS. 13 and 14, it is assumed that the joint materials 116 and 117 such as the flame-retardant silicone molded product will fall off due to the heating in the fire prevention test. . Then, when the joint materials 116 and 117 fall off, as shown in FIG. The heating surface side from the non-heating surface side, that is, the inside of the heating furnace can be seen, and the fire prevention test cannot be passed.

Therefore, in order to pass the fire protection test, it is necessary to use metal mullions that do not fall off in the fire protection test in the conventional fire protection glass screen having a multi-layered glass structure.

FIG. 16 shows a front view of a fireproof glass screen 200, which is an example of a structure using such metal mullions.

As shown in FIG. 16, the fire glass screen 200 is different from the conventional fire glass screen 100 shown in FIG. In the connecting portion, instead of the joint materials 116 and 117, mullions 216 and 217 are provided. Note that the mullion 217 is not shown in FIG. 16 because it is provided on the back side.

FIG. 17 shows a cross-sectional view of the conventional fireproof glass screen 200 shown in FIG. 16 taken along line FF. FIG. 18 shows an enlarged view of the central portion of the cross-sectional view shown in FIG.

Referring to FIG. 17, it can be seen that mullions 216, 217 are provided on both sides of the fire glass screen 200, respectively. Also, referring to FIG. 18, mullions 63 are provided in the hollow layers between the fire-resistant glasses 120A, 120B and the fire-resistant glasses 121A, 121B. A sealing material 61 and a backup material 62 are provided between the mullions 216 and 217 and the fireproof glasses 120A, 120B, 121A and 121B, respectively. Flame-retardant silicone moldings 64 are respectively provided between the mullions 63 and the fire-resistant glasses 120A, 120B, 121A, and 121B. This sealing material 61 is, for example, a silicone-based sealing material for a fire door, and the backup material 62 is, for example, a vinyl chloride foam material.

The mullions 216 and 217 and the mullion 63 are made of a metal material such as a square steel pipe, so-called square pipe, so as not to fall off in the fire test.

According to the conventional fireproof glass screen 200 having such a structure, if at least the mullions 63 do not come off in the fireproof test, cracks that can be seen inside the heating furnace do not occur, and the fireproof test can be passed. Probability is high.

Patent Document 2 also proposes a fireproof glass screen having a structure in which a fireproof sealing material is sandwiched between adjacent fireproof glasses to prevent cracks from occurring in a fireproof test. However, the refractory sealing material is in the form of a blanket and may deform or fall off when touched by a person.

JP 2017-214753 A Japanese Patent No. 6813208

As shown in FIG. 16, the fireproof glass screen 200 having the conventional structure as described above is provided with metal mullets 216 and 217 that do not come off during the fireproof test, which deteriorates the design. have. In addition, the fireproof glass screen disclosed in Patent Document 2 is also provided with mullions, and even if a double-glazed glass structure has a similar structure, the mullions are required.

According to the present invention, when a fire-resistant glass screen having a multi-layer glass structure is constructed by arranging a plurality of fire-resistant glasses facing each other, a fire test is passed without requiring mullions at the joints between the fire-resistant glasses. An object of the present invention is to provide a fireproof glass screen capable of

A fire-resistant glass screen of one aspect of the present invention is a fire-resistant double-glazed glass structure in which a plurality of first fire-resistant glasses and a plurality of second fire-resistant glasses are arranged to face each other so as to form a hollow layer. a glass screen,
The plurality of first fire-resistant glasses and the plurality of second fire-resistant glasses include positions where vertical joints between adjacent fire-resistant glasses in the plurality of first fire-resistant glasses are provided, and the plurality of sheets The position where the vertical joint between the adjacent fire-resistant glasses in the second fire-resistant glass is provided is arranged so as to be different in the width direction.

In addition, in the fire glass screen of one aspect of the present invention, the position where the vertical joint between the adjacent fire-resistant glasses in the plurality of first fire-resistant glasses is provided, and the adjacent position in the plurality of second fire-resistant glasses When the position of the vertical joint between the fire-resistant glasses is different in the width direction, and the joint material provided in the vertical joint falls off and cracks occur in the fire test. However, the structure is such that the other side cannot be seen through the crack.

Therefore, according to the fireproof glass screen of one aspect of the present invention, even if the joint material provided in the vertical joint falls off during the fire prevention test and a crack occurs, the heated side is visually recognized from the non-heated side through the crack. can pass the fire test. That is, according to the fire resistant glass screen of one aspect of the present invention, it is possible to pass the fire test without requiring mullions at the joints between the fire resistant glasses.

Further, in the fire glass screen according to one aspect of the present invention, the joint material provided in the vertical joint may be made of a flame-retardant silicone molded product.

Further, in the fire-resistant glass screen of one aspect of the present invention, each of the plurality of first and second fire-resistant glasses is adhered to each other with a resin film sandwiched between two heat-resistant crystallized glasses. It may be a laminated glass structure.

Further, in the fire-resistant glass screen of one aspect of the present invention, each of the plurality of first and second fire-resistant glasses may be composed of one heat-resistant crystallized glass.

Furthermore, in the fire-resistant glass screen of one aspect of the present invention, the heat-resistant crystallized glass is configured to have an average linear expansion coefficient of −10 to 10×10 ⁻⁷ /K in a temperature range of 30 to 750° C. good too.

Further, the fire glass screen of one aspect of the present invention has a multi-layer glass structure in which a plurality of first fire-resistant glasses and a plurality of second fire-resistant glasses are arranged facing each other so as to form a hollow layer. A fire-retardant glass screen of
In the hollow layer formed by the plurality of first fire-resistant glasses and the plurality of second fire-resistant glasses, vertical joints are provided between adjacent fire-resistant glasses in the plurality of first fire-resistant glasses. and the position where the vertical joint between adjacent fire-resistant glasses in the plurality of second fire-resistant glasses is provided, the length in the width direction compared to the first and second fire-resistant glasses A third refractory glass having a shorter length is arranged.

In the fire-resistant glass screen of one aspect of the present invention, since the third fire-resistant glass is arranged in the hollow layer, the joint material provided in the vertical joint falls off and cracks occur in the fire test. The structure is such that the other side cannot be seen through the crack even if the crack is broken.

Therefore, according to the fireproof glass screen of one aspect of the present invention, even if the joint material provided in the vertical joint falls off during the fireproof test and cracks occur, the non-heated side due to the presence of the third fireproof glass Since the heating side cannot be seen through this crack, the fire test can be passed. That is, according to the fire resistant glass screen of one aspect of the present invention, it is possible to pass the fire test without requiring mullions at the joints between the fire resistant glasses.

Further, in the fire glass screen according to one aspect of the present invention, the joint material provided in the vertical joint may be made of a flame-retardant silicone molded product.

Further, in the fire-resistant glass screen of one aspect of the present invention, each of the plurality of first, second and third fire-resistant glasses is adhered to each other with a resin film interposed between two heat-resistant crystallized glasses. It may be a laminated glass structure configured by

Further, in the fire-resistant glass screen of one aspect of the present invention, each of the plurality of first, second and third fire-resistant glasses may be composed of one heat-resistant crystallized glass.

Furthermore, in the fire-resistant glass screen of one aspect of the present invention, the heat-resistant crystallized glass is configured to have an average linear expansion coefficient of −10 to 10×10 ⁻⁷ /K in a temperature range of 30 to 750° C. good too.

According to the present invention, when a fire-resistant glass screen having a multi-layer glass structure is constructed by arranging a plurality of fire-resistant glasses facing each other, a fire test can be performed without requiring a mullion at the joint between the fire-resistant glasses. We can provide a fire rated glass screen that can pass.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the fireproof glass screen 10 which concerns on the 1st Embodiment of this invention. FIG. 2 is a vertical cross-sectional view of the fireproof glass screen 10 of the first embodiment of the present invention shown in FIG. 1 taken along line AA. FIG. 2 is a cross-sectional view of the fire protection glass screen 10 of the first embodiment of the present invention shown in FIG. 1 taken along line BB. 4 is an enlarged view of the left portion of the cross-sectional view shown in FIG. 3; FIG. FIG. 5 is a diagram showing a state in which a fire prevention test is performed on the fire protection glass screen 10 of the first embodiment of the present invention shown in FIGS. 1 to 4. FIG. It is a front view of the fireproof glass screen 40 which concerns on the 2nd Embodiment of this invention. FIG. 7 is a vertical cross-sectional view of the fire protection glass screen 40 of the second embodiment of the present invention shown in FIG. 6 taken along line CC. FIG. 7 is a transverse cross-sectional view of the fire protection glass screen 40 of the second embodiment of the present invention shown in FIG. 6 taken along line DD. FIG. 9 is an enlarged view of the left portion of the cross-sectional view shown in FIG. 8; FIG. 10 is a diagram showing how the fireproof glass screen 40 of the second embodiment of the present invention shown in FIGS. 6 to 9 is subjected to a fire test. It is a cross-sectional view of the fire-resistant glass screen 40A which has arrange|positioned the fire-resistant glass 22A as glass for gap prevention in the hollow layer. Fig. 10 is a lateral cross-sectional view of a fire-resistant glass screen 40B in which square tube-shaped fire-resistant glass 22B is arranged in a hollow layer as gap-preventing glass. 1 is a front view of a fire glass screen 100, which is an example of a structure in which a glass plate in a glass screen having a conventional multi-layer glass structure is replaced with fire glass. FIG. FIG. 14 is a transverse cross-sectional view of the conventional fireproof glass screen 100 shown in FIG. 13 taken along line EE. 13 and 14. It is a figure which shows the mode at the time of implementing a fireproof test with respect to the conventional fireproof glass screen 100 shown in FIG. 1 is a front view of a fire glass screen 200, which is an example of a structure using metal mullions. FIG. FIG. 17 is a cross-sectional view of the conventional fireproof glass screen 200 shown in FIG. 16 taken along line FF. FIG. 18 is an enlarged view of the central portion of the cross-sectional view shown in FIG. 17;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
FIG. 1 is a front view of a fireproof glass screen 10 according to a first embodiment of the invention. The fire-resistant glass screen 10 of this embodiment has a multi-layer glass structure in which two fire-resistant glasses 20A and 20B and three fire-resistant glasses 21A to 21C are arranged facing each other so as to form a hollow layer. is the screen. Note that the fire-resistant glasses 21A to 21C are not shown in FIG. 1 because they are arranged on the back side.

In addition, the fireproof glass screen 10 of this embodiment is a specific fire prevention facility that blocks flames for one hour after the flames are received and does not emit flames on the non-heated surface opposite to the heated surface.

The fireproof glass screen 10 of this embodiment has a structure to be provided in a vertically long opening having a height of 3000 mm and a width of 2500 mm, for example.

As shown in FIG. 1, the fireproof glass screen 10 comprises a frame body composed of left and right vertical frames 11 and 12, an upper frame 13 and a lower frame 14, and five fireproof glass screens fixed by this frame body. It is composed of glasses 20A, 20B, and 21A to 21C. As described above, the fire-resistant glasses 21A to 21C are arranged behind the fire-resistant glasses 20A and 20B, so they are not shown in the front view of FIG. A joint material 16 is provided between the fire-resistant glass 20A and the fire-resistant glass 20B. On the back side, a joint material 17 is provided between the fire-resistant glass 21A and the fire-resistant glass 21B, and a joint material 18 is provided between the fire-resistant glass 21B and the fire-resistant glass 21C.

FIG. 2 shows a vertical cross-sectional view of the fireproof glass screen 10 of the present embodiment shown in FIG. 1 taken along line AA. FIG. 3 shows a cross-sectional view of the fireproof glass screen 10 of the present embodiment shown in FIG. 1, taken along line BB. Further, FIG. 4 shows an enlarged view of the left side portion of the cross-sectional view of FIG.

Referring to FIG. 2, the lower sides of the refractory glass 20B and the refractory glass 21C are supported in the grooves of the lower frame 14 by setting blocks 32, respectively. The setting block 32 is made of, for example, a noncombustible calcium silicate plate. The fire-resistant glass 20B and the fire-resistant glass 21C are sandwiched and fixed between flame-retardant silicone moldings 31 in the grooves of the upper frame 13 and the lower frame 14, respectively. It can be seen that a hollow layer is formed between the fire-resistant glass 20B and the fire-resistant glass 21C. Due to the formation of such a hollow layer, a glass screen having a multi-layer glass structure is generally superior in sound insulation and heat insulation as compared with a glass screen having a single-layer structure.

Also, referring to FIG. 3, a joint material 16 is provided between the fire-resistant glass 20A and the fire-resistant glass 20B. Also, it can be seen that a joint material 17 is provided between the fire-resistant glass 21A and the fire-resistant glass 21B, and a joint material 18 is provided between the fire-resistant glass 21B and the fire-resistant glass 21C.

The joint materials 16 to 18 provided in the vertical joints are made of flame-retardant silicone moldings, for example. Here, the joint width of the vertical joint is, for example, about 5 to 10 mm, and is 5 mm or more in consideration of the ease of molding a flame-retardant silicone molded product, and 10 mm or less in consideration of design. desirable.

The joint materials 16-18 pass the fire test if they are not combustible materials. Therefore, a stainless steel plate may be used as the joint material. In this case, for example, a joint width of 2 mm can be obtained by attaching a 2 mm-thick stainless steel plate to the end of the fire-resistant glass and sandwiching it between two fire-resistant glasses.

Also, referring to FIG. 4, it is shown that the fire-resistant glasses 20A and 21A are sandwiched between flame-retardant silicone moldings 31 and fixed in the grooves of the vertical frame 11, respectively.

In the fire-resistant glass screen 10 of the present embodiment, the two fire-resistant glasses 20A and 20B and the three fire-resistant glasses 21A to 21C are provided with longitudinal joints between adjacent fire-resistant glasses in the two fire-resistant glasses 20A and 20B. The position (position of joint material 16) and the position (position of joint material 17, 18) where vertical joints between adjacent fire-resistant glasses in three fire-resistant glasses 21A to 21C are provided are in the width direction. are arranged differently in the

Then, the fire-resistant glass screen 10 of the present embodiment includes the position where the vertical joint 16 between the adjacent fire-resistant glasses in the two fire-resistant glasses 20A and 20B is provided, and the adjacent fire-resistant glass in the three fire-resistant glasses 21A to 21C. Since the positions where the vertical joints 17 and 18 between the glass are provided are different in the width direction, the joint materials 16 to 18 provided in the vertical joints fell off and cracks occurred in the fire test. The structure is such that even if a crack occurs, the other side cannot be seen through the crack.

Therefore, according to the fireproof glass screen 10 of the present embodiment, even if the joint materials 16 to 18 provided in the vertical joints fall off during the fire test and cracks occur, from the non-heated side to the heated side through the cracks. can pass the fire test because the In other words, according to the fireproof glass screen 10 of the present embodiment, it is possible to pass the fireproof test without requiring mullions at the joints between the fireproof glasses.

FIG. 5 shows how the fireproof glass screen 10 of this embodiment shown in FIGS. 1 to 4 was subjected to a fireproof test. Referring to FIG. 5, even if the joint materials 16 to 18 fall off due to the heat in the fire prevention test and cracks occur, the position of the vertical joint is different on the front and back, so the flame may come out to the non-heated surface side. , It can be seen that the heating side is not visible from the non-heating side.

The same applies when the fire prevention test is performed with the fire protection glass screen 10 of the present embodiment turned over. It prevents things like coming out to the side.

The fire-resistant glasses 20A, 20B, 21A to 21C can be heat-resistant crystallized glass, heat-resistant strengthened glass, tempered glass, low-expansion fire-resistant glass, laminated glass containing sodium silicate, or the like.

The fire-resistant glasses 20A, 20B, 21A to 21C in this embodiment are heat-resistant crystallized glass with a thickness of 5 mm.

Further, even when heat-resistant crystallized glass is used, each of the fire-resistant glasses 20A, 20B, 21A to 21C may be composed of one sheet of heat-resistant crystallized glass, or between two sheets of heat-resistant crystallized glass. A laminated glass structure may be adopted in which a resin film is interposed between the glass substrates.

Here, the heat-resistant crystallized glass is obtained by depositing fine crystals on a glass having a lithium alumina silicate-based composition by heat treatment to extremely reduce thermal expansion and improve heat resistance. That is, the average linear expansion coefficient of the heat-resistant crystallized glass 102 is extremely small, and the average linear expansion coefficient of the heat-resistant crystallized glass is configured to be −10 to 10×10 ⁻⁷ /K in the temperature range of 30 to 750° C., for example. It is A product having an average linear expansion coefficient of -0.5 to 0.5×10 ^-6 /K in the temperature range of 20 to 300° C. can also be used as the heat-resistant crystallized glass.

In the fire glass screen 10 of the present embodiment, the case where one surface is composed of two fire-resistant glasses 20A and 20B and the other surface is composed of three fire-resistant glasses 21A to 21C has been described. The number of refractory glasses constituting the surface of is not limited to such a case. The present invention can be applied to any configuration as long as the positions of the vertical joints between the refractory glasses are different between one surface and the other surface.

[Second embodiment]
Next, a fire glass screen 40 according to a second embodiment of the invention will be described.

FIG. 6 is a front view of a fire glass screen 40 according to a second embodiment of the invention. The fire-resistant glass screen 40 of this embodiment has a multi-layer glass structure in which two fire-resistant glasses 20A and 20B and two fire-resistant glasses 23A and 23B are arranged facing each other so as to form a hollow layer. is the screen. Note that the fireproof glasses 23A and 23B are not shown in FIG. 6 because they are arranged on the back side.

In addition, the fire glass screen 40 of the present embodiment, like the fire glass screen 10 of the first embodiment described above, also blocks the flame for 1 hour after the flame even if it receives a flame, and the heat on the opposite side of the heating surface. It is a specific fire prevention facility that does not emit flames on the non-heated surface side.

As shown in FIG. 6, the fireproof glass screen 40 in this embodiment is fixed by a frame composed of left and right vertical frames 41 and 42, an upper frame 43 and a lower frame 44, and this frame. It is composed of four fire-resistant glasses 20A, 20B, 23A, 23B and a fire-resistant glass 22 arranged in a hollow layer composed of the four fire-resistant glasses 20A, 20B, 23A, 23B. Note that the fire-resistant glasses 23A and 23B are not shown in the front view of FIG. 6 because they are arranged behind the fire-resistant glasses 20A and 20B as described above. A joint material 16 is provided between the fire-resistant glass 20A and the fire-resistant glass 20B, and a joint material 19 is provided between the fire-resistant glass 23A and the fire-resistant glass 23B on the back side. This joint material 19 is also not shown in FIG.

FIG. 7 shows a vertical cross-sectional view of the fire protection glass screen 40 of this embodiment shown in FIG. 6 taken along line CC. FIG. 8 shows a cross-sectional view of the fireproof glass screen 40 of this embodiment shown in FIG. 6 taken along the line DD. Further, FIG. 9 shows an enlarged view of the left side portion of the cross-sectional view of FIG.

Referring to FIG. 7, the lower sides of fire-resistant glass 20B, fire-resistant glass 22, and fire-resistant glass 23B are supported in grooves of lower frame 44 by setting blocks 32, respectively. The fire-resistant glass 20B, the fire-resistant glass 22, and the fire-resistant glass 23B are sandwiched and fixed between the flame-retardant silicone moldings 31 in the grooves of the upper frame 43 and the lower frame 44, respectively. As shown in FIG. 7, it can be seen that the refractory glass 22 is arranged in a hollow layer formed between the refractory glass 20B and the refractory glass 23B.

Also, referring to FIG. 8, a joint material 16 is provided between the fire-resistant glass 20A and the fire-resistant glass 20B. Also, it can be seen that a joint material 19 is provided between the fire-resistant glass 23A and the fire-resistant glass 23B. In FIG. 8, fire-resistant glass 22 is arranged as gap-preventing glass for blocking the line of sight between the position of the vertical joint between fire-resistant glasses 20A and 20B and the position of the vertical joint between fire-resistant glasses 23A and 23B. is shown.

Further, referring to FIG. 9, fire-resistant glasses 20A and 23A are shown to be sandwiched and fixed by flame-retardant silicone moldings 31 in the grooves of vertical frame 41, respectively.

In the fireproof glass screen 40 in this embodiment, the position of the vertical joint (position of the joint material 16) provided between the fireproof glass 20A and the fireproof glass 20B, and the position of the fireproof glass 23A and the fireproof glass 23B. It is the same position as the position of the vertical joint (position of the joint material 19).

However, in the fire-resistant glass screen 40 of the present embodiment, in the hollow layer formed by the two fire-resistant glasses 20A and 20B and the two fire-resistant glasses 23A and 23B, the two fire-resistant glasses 20A and 20B are adjacent to each other. Fire-resistant glass 20A, 20B, 23A, 23B between the position where the vertical joint between the glasses is provided and the position where the vertical joint between the adjacent fire-resistant glasses in the two fire-resistant glasses 23A, 23B is provided. A fire-resistant glass 22 having a shorter width in the width direction is arranged.

For example, the fire-resistant glass 22 has a width of 200 mm, and the fire-resistant glasses 20A, 20B, 23A, and 23B each have a width of 1250 mm. The fire-resistant glass 22 may be made of the same material as the fire-resistant glasses 20A, 20B, 23A, and 23B, or may be made of a material different from that of the fire-resistant glasses 20A, 20B, 23A, and 23B.

For example, the fire-resistant glasses 20A, 20B, 23A, and 23B may be heat-resistant tempered glass with a thickness of 10 mm, and the fire-resistant glass 22, which is the gap-preventing glass, may be heat-resistant crystallized glass with a thickness of 5 mm. In addition, the fire-resistant glass 22 arranged as the gap-preventing glass in the hollow layer must be made of a material that does not break, fall off, or soften and deform in the fire test. glass is suitable.

In the fireproof glass screen 40 of the present embodiment, since the fireproof glass 22 is arranged in the hollow layer, even if the joint materials 16 and 19 provided in the vertical joints fall off and cracks occur in the fireproof test, The structure is such that the other side cannot be seen through this crack.

Therefore, according to the fireproof glass screen 40 of the present embodiment, even if the joint materials 16 and 19 provided in the vertical joint fall off during the fire prevention test and a crack occurs, the crack is passed from the non-heated side to the heated side. can pass the fire test because the That is, according to the fireproof glass screen 40 of the present embodiment, it is possible to pass the fireproof test without requiring mullions at the joints between the fireproof glasses.

FIG. 10 shows how the fireproof glass screen 40 of this embodiment shown in FIGS. 6 to 9 was subjected to a fireproof test. Referring to FIG. 10, even if the joint materials 16 and 19 fall off due to the heat in the fire prevention test and cracks occur, the provision of the fire protection glass 22 prevents the flame from coming out to the non-heated surface side or the non-heated surface. It can be seen that the structure is such that the heating side cannot be seen from the heating side.

11 and 12 are cross-sectional views of fire-resistant glass screens using modified examples of the fire-resistant glass 22. FIG. FIG. 11 is a cross-sectional view of a fire-resistant glass screen 40A in which a cylindrical fire-resistant glass 22A having a diameter of 40 mm and a plate thickness of 4 mm is arranged as gap-preventing glass in the hollow layer. Further, FIG. 12 is a cross-sectional view of a fire-resistant glass screen 40B in which a square cylindrical fire-resistant glass 22B having a thickness of 4 mm is arranged in the hollow layer as gap-preventing glass.

Even the fire-resistant glass screens 40A and 40B having the structures shown in FIGS. 11 and 12 pass the fire test without requiring mullions at the joints between the fire-resistant glasses, like the fire-resistant glass screen 40. be able to.

Note that the fire-resistant glasses 22, 22A, 22B, 23A, and 23B in the present embodiment are also heat-resistant crystallized glass and heat-resistant tempered glass, like the fire-resistant glasses 20A, 20B, and 21A to 21C in the first embodiment described above. , tempered glass, low-expansion fireproof glass, and laminated glass containing sodium silicate.

10 fire glass screen 11, 12 vertical frame 13 upper frame 14 lower frame 16-19 joint material 20A, 20B fire-resistant glass 21A-21C fire-resistant glass 22, 22A, 22B fire-resistant glass 23A, 23B fire-resistant glass 31 flame-retardant silicone molded article 32 Setting block 40 Fireproof glass screen 41, 42 Vertical frame 43 Upper frame 44 Lower frame

Claims (6)

A fire-resistant glass screen having a multi-layer glass structure in which a plurality of first fire-resistant glasses and a plurality of second fire-resistant glasses are arranged to face each other so as to form a hollow layer,
The plurality of first fire-resistant glasses and the plurality of second fire-resistant glasses include positions where vertical joints between adjacent fire-resistant glasses in the plurality of first fire-resistant glasses are provided, and the plurality of sheets The positions where the vertical joints between adjacent fire-resistant glasses in the second fire-resistant glass are provided are arranged so as to be different in the width direction,
Fireproof glass screen. Positions where vertical joints between adjacent fire-resistant glasses in the plurality of first fire-resistant glasses are provided, and positions where vertical joints between adjacent fire-resistant glasses in the plurality of second fire-resistant glasses are provided and are arranged differently in the width direction, so that even if the joint material provided in the vertical joint falls off and cracks occur in the fire test, the other side cannot be seen through the crack. The fire glass screen of claim 1, comprising: 2. The fireproof glass screen according to claim 1, wherein the joint material provided in said vertical joints is made of flame-retardant silicone molding. The plurality of sheets of the first and second fire-resistant glasses each have a laminated glass structure formed by sandwiching a resin film between two sheets of heat-resistant crystallized glass and adhering them to each other. Item 1. The fire glass screen according to item 1. 2. The fire-resistant glass screen according to claim 1, wherein each of said plurality of sheets of first and second fire-resistant glasses is composed of one sheet of heat-resistant crystallized glass. 6. The fire glass screen according to claim 4, wherein said heat-resistant crystallized glass has an average linear expansion coefficient of -10 to 10×10 ^-7 /K in a temperature range of 30 to 750°C.

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