JP2018115493A - Road sound barrier panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a road sound barrier panel capable of suppressing the direct effect on the private land side due to impact or heat from the road side, and maintaining the shape of at least a panel.SOLUTION: A road sound barrier panel 1 is provided with a road side plate body 2 made of chemical strengthened glass in a substantially plate shape and arranged on the road side, a private land side plate body 3 made of chemical strengthened glass in a substantially plate shape and arranged on the private land side opposite to the road side and spaced apart from the road side plate body 2, and a spacer glass plate body 4 in a substantially plate shape intervening between the road side plate body 2 and the private land side plate body 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a road noise barrier panel arranged along a road side of a road.

  In order to reduce traffic noise and the like, road soundproof wall panels are arranged on the road side. In addition to soundproofing, this panel preferably has translucency in order to give the driver a feeling of opening during driving. This eliminates the feeling of pressure on the driver and ensures sunshine to neighboring residents. Various developments have been made on such a light-proof and sound-proof road sound barrier panel (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent No. 5869794 Japanese Patent No. 5921103

  However, since traffic accidents and the like can occur in the road, it is desirable to prevent the impact or fire from the road side from affecting the outside (private side) of the road. That is, since there are many neighborhood residents on the outside of the road, it should be avoided that a part of the panel falls or the panel itself disappears on such a private land side.

  The present invention takes the above-mentioned conventional technology into consideration, suppresses the impact of the impact and flame from the road side directly on the private side, and can maintain the shape as a panel at least. An object is to provide a wall panel.

  In order to achieve the above object, in the present invention, a road soundproof wall panel to be arranged along the road side of the road, the road side plate body having a substantially plate shape made of chemically strengthened glass arranged on the road side, A substantially plate-shaped private side plate made of chemically tempered glass disposed on the private side opposite to the road side and spaced from the road side plate, and the road side plate and the private land Provided is a road noise barrier panel comprising a substantially plate-shaped spacer glass plate interposed between a side plate and a side plate.

  Preferably, the spacer glass plate is made of float glass or netted glass.

  Preferably, the spacer glass plate has a thickness of 1.25 times or more with respect to the thickness of the private side plate.

  According to the present invention, since the spacer glass plate is interposed between the road side plate and the private side plate, it is possible to suppress the occurrence of burnout in the private side plate. That is, fire resistance performance as a panel can be improved by having a spacer glass plate. By using float glass or netted glass as the spacer glass plate, such float glass or netted glass is often made of glass with a large plate thickness and has a large heat capacity. You can earn time until it reaches the private side. Further, the spacer glass plate can be manufactured at low cost by using float glass or netted glass. In particular, it has been confirmed by experiments that sufficient fire resistance can be obtained by setting the thickness of the spacer glass plate to 1.25 times or more the thickness of the private-side plate.

  With such a structure, heat from a fire or the like from the road side can be prevented by a spacer glass plate that has a sufficient thickness and can increase the fire resistance time. As a result, it is possible to suppress the influence of fire from the road side directly on the private side plate, to maintain at least the shape of the panel, and to improve the safety on the private side.

  On the other hand, the road side plate body and the private side plate body are disposed with a space therebetween through the spacer glass plate body, so that the rigidity of the entire panel is increased and the strength against impact can be improved. . If float glass or netted glass is used as the spacer glass plate, these have low allowable stress, and the fragments are relatively large even when cracked. Therefore, since it cracks without accompanying a big impact, the impact by the crack does not affect a road side board or a private side board. That is, it is possible to prevent the road side plate or the private side plate from being broken together with the crack of the spacer glass plate.

It is a panel body schematic diagram of the panel for road noise barriers concerning the present invention. It is a schematic sectional drawing when a panel body is inserted in a metal frame. It is a schematic sectional drawing when a panel body is inserted in a metal frame. It is a schematic sectional drawing at the time of attaching a metal frame to H steel. It is a schematic sectional drawing at the time of attaching a metal frame to H steel. It is the schematic when the panel for road noise barriers is installed in the road. It is data which shows the allowable stress according to the kind of glass. It is the structure of each panel used for the fire resistance test. It is an experimental data of a fire resistance test.

  The road sound barrier panel 1 according to the present invention is arranged along the road side of the road. That is, the road noise barrier panel 1 has a portion facing the road side and the private side opposite to the road side. On the road side, a substantially plate-shaped road side plate body 2 is disposed. On the private side, a substantially plate-shaped private side plate 3 is arranged, and this private side plate 3 is arranged at a distance from the road side plate 2. In order to place the road side plate 2 and the private side plate 3 apart from each other, a substantially plate-shaped spacer glass plate 4 is interposed between the road side plate 2 and the private side plate 3. . That is, the spacer glass plate 4 is sandwiched between the road side plate 2 and the private side plate 3. The road side plate 2 and the spacer glass plate 4 and the spacer glass plate 4 and the private side plate 3 are bonded to each other with an intermediate film 5 interposed therebetween. A panel body 6 is formed by the road side plate body 2, the private land side plate body 3, the spacer glass plate body 4 and the intermediate film 5. That is, the panel body 6 is formed by bonding the road side plate body 2, the spacer glass plate body 4, and the private land side plate body 3 through the intermediate film 5. In the example shown in the figure, an example is shown in which one spacer glass plate 4 is sandwiched between the road side plate 2 and the private side plate 3, but the number of spacer glass plates 4 is particularly limited. It is not something.

  The road side plate 2 and the private side plate 3 are made of chemically strengthened glass (CT). Chemically tempered glass is made by immersing float glass in molten potassium salt (potassium nitrate, potassium sulfate, potassium bisulfate, potassium carbonate, potassium bicarbonate, potassium chloride, etc.), and removing sodium ions with a small ionic radius on the glass surface. It is substituted with potassium ions having a large radius, and a compressive stress layer is formed on the glass surface. This chemically tempered glass has better heat resistance and impact resistance than float glass, and natural breakage that causes the glass to break unexpectedly when no external force is applied compared to general air-cooled tempered glass. Hateful. Chemically tempered glass has impact strength (surface strength) at the center compared to other glasses (float glass (FL), meshed glass (PHW), double strength glass (HS), air-cooled tempered glass (PT)). It is excellent.

  On the other hand, the spacer glass plate 4 is made of glass. Preferably, the spacer glass plate 4 is made of float glass or netted glass. The float glass is a plate made of ordinary soda lime silicate glass (or borosilicate glass or the like). The tempered glass with a net is a glass in which wires are arranged. This wire prevents the glass from scattering when the glass is broken.

  The purpose of the road sound barrier panel 1 according to the present invention is to prevent the impact of fires and impacts such as traffic accidents occurring on the road on the private side. Therefore, the shape of the private side plate 3 is maintained as much as possible, or even if the private side plate 3 is cracked, the fragments are made small.

  As described above, since the spacer glass plate 4 is interposed between the road side plate 2 and the private side plate 3 in the panel 1, the occurrence of burnout in the private side plate 3 is suppressed. be able to. In other words, the presence of the spacer glass plate 4 can improve the fire resistance of the panel. If float glass or netted glass is used as the spacer glass plate 4, these are often glass with a large thickness, and the heat capacity is large, so the time until the heat from the flame from the road side is transmitted to the private side is long. You can earn. For example, even if a fire occurs on the road side, a considerable amount of time can be earned before the heat is transmitted to the private side.

  Here, for example, the thickness of the spacer glass plate 4 is preferably 3 mm to 19 mm. In particular, when the thickness is in the range of 3 mm to 10 mm, it has been confirmed by experiments that the influence of heat due to fire on the road to which the present invention is applied is difficult to reach the private side plate 3. Further, the spacer glass plate 4 can be manufactured at low cost by using float glass or netted glass.

  In addition, since the road side plate body 2 and the private side plate body 3 are disposed with a space therebetween via the spacer glass plate body 4, the rigidity of the panel body 6 (road noise barrier panel 1) as a whole is increased. Can be raised. For this reason, the intensity | strength with respect to the impact from the road side can be improved. And since the float glass or the glass with a mesh is used as the spacer glass plate 4 interposed between the road side plate 2 and the private side plate 3, these have a small allowable stress and can be cracked. The fragments are relatively large. Therefore, since it is cracked without a large impact, the impact due to the crack does not affect the road side plate 2 or the private side plate 3. That is, it is possible to prevent the road side plate 2 or the private side plate 3 from being broken together with the crack of the spacer glass plate 4. Thus, since the glass which has the characteristic which can be broken finely is not preferable as the spacer glass plate body 4, it is preferable to employ float glass or netted glass.

  Moreover, since the chemically strengthened glass is used for the road side plate 2 and the private side plate 3, the impact resistance is increased. In particular, by disposing chemically tempered glass having high impact resistance on the road side plate body 2, the impact due to the impact from the road side can be prevented and the impact resistance of the road sound barrier panel 1 as a whole can be improved. Here, the road side plate body 2 has a thickness of 1.5 mm to 8.0 mm, and the private side plate body 3 has a thickness of 1.5 mm to 5.0 mm. The reason why the thickness of the road side plate body 2 can be set more than that of the private side plate body 3 is that it is necessary to first receive an impact from the road side on the road to which the present invention is applied. From this viewpoint, it is preferable that the road side plate body 2 is thicker than the private side plate body 3. In addition, by setting the thickness of the private side plate 3 to 1.5 mm to 5.0 mm, it is possible to prevent the fragments from becoming large when the private side plate 3 is broken. That is, the influence of debris on the private side can be minimized. Further, by using chemically tempered glass, natural breakage that occurs in air-cooled tempered glass does not occur.

  With such a structure, heat from fires from the road side has a sufficient thickness and can earn fire-resistant time, and the impact from the road side has a sufficient thickness and chemical strengthening with high impact resistance This can be prevented by the road side plate 2 made of glass. As a result, it is possible to suppress the influence of heat and impact from the road side directly on the private side plate 3, and to maintain at least the shape of the road noise barrier panel 1, and to secure the private side Can be improved. The structure of the road noise barrier panel 1 according to the present invention focuses on the characteristics of each glass in the allowable stress at the edge portion of the glass as shown in FIG. 7 and the in-plane allowable stress that is the central portion of the glass. It has been adopted. Moreover, since the road soundproof wall panel 1 is configured on the basis of glass, it is excellent in translucency and does not hinder visibility. Since it is applied to the road, it can give the driver an excellent landscape. In addition, compared to the case where a resin such as polycarbonate is applied as a plate body, the durability is excellent, the transparency is much higher, and the aesthetics are also higher.

  The intermediate film 5 is made of polyvinyl butyral or ionomer resin. General thermoplastic resin, thermosetting resin, UV curable resin, etc. can be used. Vinyl polymer, ethylene-vinyl monomer copolymer, styrene copolymer, polyurethane resin, fluororesin, acrylic resin It is preferable that it contains.

  When the panel body 6 is installed on the road, it is fitted into the metal frame 7. Specifically, as shown in FIGS. 2 and 3, the entire periphery of the panel body 6 is fitted so as to be covered with the metal frame 7. 2 shows a cross-sectional view when viewed from the side, and FIG. 3 when viewed from above. The metal frame 7 has a substantially rectangular frame shape, and includes an upper horizontal frame 8a, a lower horizontal frame 8b, and a vertical frame 8c. Each of the frames 8 a to 8 c has a private side covering portion 9 that protrudes inward of the private side plate 3 so as to cover the peripheral side of the private side plate 3. That is, it can be said that the private side cover portion 9 is a portion of the metal frame 7 that covers the outer peripheral edge of the private side plate 3. On the other hand, the peripheral side of the road side plate body 2 is covered with a pressing edge 11 which is a part of the metal frame 7. Specifically, the pressing edge 11 is fixed to each of the frames 8 a to 8 c with a tapping screw 12. Sealing material 13 is arranged between the road side plate 2 and the pushing edge 11 and between the private side plate 3 and the private side cover 9 to prevent water intrusion into the metal frame 7. The top surface (inner surface) 10 of the private-side cover portion 9 is arranged on the same plane as the top surface 14 of the pressing edge 11. Thereby, the metal frame 7 is not visually recognized through the glass, and an excellent aesthetic appearance can be obtained.

  A plurality of panel bodies 6 fitted in the metal frame 7 are arranged side by side and installed on the road. At this time, the strength is further improved. As shown in FIG. 4 (cross-sectional view from the side) and FIG. 5 (cross-sectional view from above), the plurality of metal frames 7 are abutted with each other at the frames 8a to 8c, and the end portions are fitted into the H steel 15. It is. This increases the rigidity. At this time, it is attached so that the road side of the metal frame 7 is in contact with one flange 16a of the H steel 15. An urging tool 18 for fixing the metal frame 7 is interposed between the other flange 16b of the H steel 15 and the metal frame 7 in the vertical direction. In this way, as shown in FIG. 6, the road sound barrier panel 1 is erected along the road side of the road 19. As apparent from FIG. 6, the H steel 15 plays a role as a support. The road noise barrier panel 1 according to the present invention is not limited to the configuration described above. The panel body 6 can be applied to a road noise barrier panel having a configuration other than that described above. Further, the metal frame 7 is not limited to the structure described above. The panel body can be applied to metal frames having various structures.

  Here, the fireproof test was done about the panel 1 for road soundproof walls which concerns on this invention. As shown in FIG. 8, the panels used as test specimens had four panels as comparative examples (Comparative Examples 1 to 4) and seven panels as Examples (Examples 1 to 7). In each of the comparative examples, the spacer glass plate 4 is not provided, and the road side plate 2 and the private side plate 3 are used. In both the comparative example and the example, the road side plate 2 and the private side plate 3 are all formed of chemically strengthened glass. Specifically, Comparative Example 1 is a laminated glass of chemically tempered glass having a thickness of 3 mm, Comparative Example 2 is a laminated glass of chemically tempered glass having a thickness of 4 mm, Comparative Example 3 is a laminated glass of chemically tempered glass having a thickness of 5 mm, In Comparative Example 4, a laminated glass of chemically strengthened glass having a thickness of 6 mm was used.

  The spacer glass plate 4 of the example is formed entirely of float glass (FL) except for Example 7. In Example 7, netted glass (PHW) was used as the spacer glass plate 4. Specifically, Example 1 has three laminated glasses in which float glass having a thickness of 4 mm is interposed in chemically tempered glass having a thickness of 4 mm as the road side plate 2 and the private side plate 3. As the panel 1, three laminated glasses in which a float glass having a thickness of 4 mm is interposed in a chemically tempered glass having a thickness of 5 mm as the road side plate 2 and a thickness 3 mm as the private side plate 3 are used as the panel 1. In Examples 3 to 6, chemically tempered glass having a thickness of 4 mm is used as the road side plate 2 and the private side plate 3. Example 3 has a thickness of 5 mm, Example 4 has a thickness of 6 mm, Example 5 has a thickness of 8 mm, and Example 6 has three laminated glasses with a 10 mm thick float glass interposed therebetween. It was. In Example 7, as the panel 1, three laminated glasses in which a 6.8 mm thick netted glass is interposed in a 4 mm thick chemically tempered glass as the road side plate 2 and the private side plate 3 are used as the panel 1. .

  In the fire resistance test, each panel 1 was subjected to a flame from the road side plate body 2 side in a refractory furnace and heated for a predetermined time to examine whether it burned out (the private side plate body 3 dropped). The panel 1 used as a test body was 1 m high and 2 m wide having an aluminum frame on four sides. Heating was performed under the conditions of a standard heating time temperature curve “ISO834-1”. The fire resistance test was performed in four ways: the fire resistance test 1 was heated for 4 minutes, the fire resistance test 2 for 5 minutes, the fire resistance test 3 for 8 minutes, and the fire resistance test 4 for 10 minutes.

  As is clear from the experimental results shown in FIG. 9, in all of the comparative examples, all of 1-4 were burned out in the fire resistance test 1. Specifically, the road side plate body 2 cracked greatly in 1 minute to 2 minutes, and dropped after 3 minutes. On the other hand, a crack occurred in the private side plate 3 in 3 to 4 minutes, and burnout occurred from this crack. Since burnout occurred in all of Comparative Examples 1 to 4 in this way, in Comparative Examples 1 to 4, the thickness of the chemically strengthened glass is gradually increased. It can be seen that there is no change in performance.

  On the other hand, in any of Examples 1 to 7, no burnout occurred in the fire resistance test 1. From this, by interposing the spacer glass plate 4 made of float glass or netted glass in the chemically tempered glass, the fire resistance performance is improved as compared with the conventional two laminated glasses (Comparative Examples 1 to 4). I understand that. In particular, referring to Examples 1 and 2, the total thickness is not much different from Comparative Examples 3 and 4 (Comparative Example 3 has a total thickness of 10 mm, Comparative Example 4 has a total thickness of 12 mm, Example 1 has a total thickness of 12 mm, In Example 2, the total thickness is 11 mm), and it can be seen that the fire resistance is improved depending on the presence or absence of the spacer glass plate 4. That is, rather than simply increasing the total thickness with only chemically tempered glass and configuring the panel, the panel 1 in which the spacer glass plate 4 is interposed with float glass or netted glass has better fire resistance performance. It turns out that it improves.

  This is also cost effective. Rather than forming all of the panel 1 with chemically tempered glass as in Comparative Examples 3 and 4, the amount of chemically tempered glass used can be reduced by including part of the float glass as in Examples 1 and 2. . Since chemically strengthened glass is very expensive, it can be said that it is a preferable result that the fire resistance can be improved by suppressing the amount of use thereof as much as possible.

  Furthermore, fire resistance test 2 was performed on Examples 1-7. Again, no burnout occurred for all examples. However, the results of Examples 1 and 2 and Examples 3 to 7 were slightly different. In Example 1 and 2, the road side board 2 and the spacer glass board 4 fell, and the private side board 3 did not fall. After the heating was stopped, the private side plate 3 was also dropped. Specifically, the road side plate 2 of Examples 1 and 2 cracked 1 to 2 minutes after heating and dropped after 3 minutes. The spacer glass plate 4 cracked immediately after heating and dropped in 4 to 5 minutes. The private side plate 3 was cracked and dropped after 5 minutes after the heating was stopped.

  On the other hand, about Example 3-7, even after the heating stop by the fireproof test 2, the private side board body 3 did not fall. Only the road side plate body 2 fell. Such a difference in the number of dropped sheets is that only one of the private side plate 3 remains in FIG. 9 and is dropped after the heating is stopped. The single round, the spacer glass plate 4 and the private side plate 3 have two pieces. The remaining items are indicated by double circles. Taking the above into consideration, the fire resistance performance is improved over Example 1 which is 1 time by setting the thickness of the spacer glass plate 4 to 1.25 times or more the thickness of the private side plate 3. I can say.

  Subsequently, fire test 3 was performed. As a result, burnout occurred in Examples 1 to 3. In Example 4 (the thickness of the spacer glass plate 4 is 1.5 times the thickness of the private side plate 3), only one of the private side plates 3 remains, and the private side plate 3 also dropped after the heating was stopped. In Examples 5 to 7, neither the spacer glass plate 4 nor the private side plate 3 fell. Furthermore, in the fire resistance test 4, burnout occurred in Example 4, and in Example 5 (the thickness of the spacer glass plate 4 is twice the thickness of the private side plate 3), only one of the private side plates 3 is used. Remained, and the private side plate 3 also dropped after the heating was stopped. In Example 6 (the thickness of the spacer glass plate 4 is 2.5 times the thickness of the private side plate 3) and Example 7, neither the spacer glass plate 4 nor the private side plate 3 was dropped.

  Here, about Examples 3-6, the thickness of the spacer glass plate 4 is 1.25 times or more with respect to the thickness of the private side plate 3, and it is common in the point that the spacer glass plate 4 is float glass. doing. And the spacer glass plate body 4 is gradually thickened in the order of Examples 3-6.

  Referring to the results of the fire resistance tests 3 and 4, in order from the example in which the spacer glass plate 4 is thin, “burn out”, “only one sheet of the private side plate 3 remains (one sheet remaining)”, “spacer It is a stepwise result that two sheets of glass plate body 4 and private side plate body 3 (two sheets remaining) are generated. Specifically, in fire test 3, Example 3 burns out, one Example 4 remains, and two Examples 5 remain, and in fire test 4, Example 4 burns out and Example 5 is 1 The number of sheets remaining and two sheets of Example 6 remained. That is, if the heating time is extended, it can be said that the thicker the spacer glass plate 4 is, the higher the fire resistance is.

  This indicates that when the thickness of the spacer glass plate 4 is 1.25 times or more than the thickness of the private side plate 3, the fire resistance performance is improved in a relevant manner (spacer The thicker the glass plate 4 is, the more difficult it is to drop the private side plate 3). Therefore, it can be said that the numerical value of 1.25 times or more is important for showing such an index.

  When the fire resistance tests of Examples 3 to 6 were described in detail, the road side plate body 2 cracked in 1 to 2 minutes and dropped after 3 minutes. Since the spacer glass plate 4 was float glass, it cracked immediately after heating. In Examples 3 to 6, the thicker the spacer glass plate 4 is, the harder the interlayer film between the spacer glass plate 4 and the private side plate 3 is to be melted. As a result, it was difficult to fall out and burnout was less likely to occur. In the case of using float glass as the spacer glass plate 4, Example 6 withstood the fire resistance test 4 with the longest heating time, so that the thickness of the spacer glass plate 4 was 2 with respect to the thickness of the private side plate 3. If it is 5 times or more, it can be said that the panel 1 that can keep the private side sufficiently safe can be provided.

  In Example 7, no burnout occurred in any of the fire resistance tests 1 to 4. In the fire resistance test of Example 7, the road side plate 2 cracked in 1 to 2 minutes and dropped after 3 minutes. The spacer glass plate 4 cracked immediately after heating, but the spacer glass plate 4 and the private side plate 3 did not collapse. Even after the heating time of the fire resistance test 4 in which the heating time was the longest, the private side plate body 3 did not fall. In this way, it was confirmed that if a glass with a mesh is used as the spacer glass plate 4, the thickness can be made thinner than that of the float glass and the fire resistance performance equivalent to or higher can be exhibited (total thickness of 14 mm in Example 4, implemented). The total thickness of Example 5 is 16 mm, the total thickness of Example 6 is 18 mm, and the total thickness of Example 7 is 12.8 mm).

  From the above, it was confirmed that the time until the occurrence of burnout can be increased by interposing the spacer glass plate 4 in the chemically strengthened glass. Further, in Comparative Example 4 and Example 1, the thickness (total thickness) as the panel 1 is the same at 12 mm, but Example 1 requires a longer time until occurrence of burnout. I understood. Further, in Comparative Examples 2 to 4 and Example 1, the thickness of the chemically strengthened glass used is thinner in Example 1, but it takes a longer time for Example 1 to burn out. I understood. When Example 1 was compared with Examples 3 to 6, the thickness of the chemically strengthened glass used was the same, but it was confirmed that the time until the occurrence of burnout increased according to the thickness of the spacer glass plate 4. .

1: road noise barrier panel, 2: road side plate, 3: private side plate, 4: spacer glass plate, 5: intermediate film, 6: panel, 7: metal frame, 8a: upper horizontal frame, 8b : Bottom horizontal frame, 8c: vertical frame, 9: private side cover, 10: top surface of private side cover, 11: pressing edge, 12: tapping screw, 13: sealing material, 14: top surface of pressing edge, 15: H steel, 16a: flange, 16b: flange, 18: biasing tool, 19: road

Claims (3)

A panel for a road noise barrier that should be arranged along the roadside of the road,
A substantially plate-shaped road side plate body made of chemically strengthened glass disposed on the road side,
A substantially plate-shaped private side plate made of chemically tempered glass, which is arranged on the private side opposite to the road side and arranged with a space from the road side plate,
A road soundproof wall panel comprising a substantially plate-shaped spacer glass plate interposed between the road side plate and the private side plate.   The road noise barrier panel according to claim 1, wherein the spacer glass plate is made of float glass or netted glass.   The road noise barrier panel according to claim 1 or 2, wherein the spacer glass plate has a thickness of 1.25 times or more with respect to the thickness of the private side plate.

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