JP3647233B2 - Translucent sound insulation board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a translucent sound insulation board that is installed mainly along roads and railway lines for the purpose of sound insulation.
[0002]
[Prior art]
In order to block noise from vehicles, sound insulation boards are installed along roads and railway lines. Some of these sound insulation plates are made of non-transparent sound insulation plates such as PC concrete and metal, but those made of non-translucent sound insulation plates are excellent in sound insulation, but are installed on elevated roads. In some cases, the weight of the foundation becomes heavy in relation to the foundation, and the surrounding scenery is blocked by the opaqueness, so that there is a feeling of pressure and the scenery is poor.
[0003]
[Problems to be solved by the invention]
Therefore, in recent years, sound insulation plates made of translucent plates made of translucent synthetic resin such as polycarbonate having translucency have been widely used to reduce the weight and prevent the surrounding scenery from being obstructed. ing. Conventionally, as such a translucent sound insulation board, there is one in which the same square translucent plate is bolted to the entire front surface of a frame framed in a quadrangular shape by an L-shaped metal frame material.
[0004]
However, when the translucent plate is bolted to the front surface of the metal frame, the translucent plate expands and contracts because the metal frame and translucent plate made of translucent synthetic resin have different thermal expansion coefficients. By doing so, there is a problem that the translucent plate is waved and easily distorted. In addition, since the entire circumference of the translucent plate is fixed to the frame body, when a large impact load is applied to the translucent plate in a collision accident caused by a recent speedup of a traveling vehicle or a collision accident of a large crane vehicle, etc. The translucent plate may be destroyed and the fragments may be scattered. In addition, when installed on an elevated road with a railroad or road below the sound insulation board, there is a risk that a broken piece of the translucent board will fall and cause a secondary disaster.
[0005]
Therefore, in order to cope with the expansion and contraction of the translucent plate, as described in JP-A-7-11608, an opening is formed between the frame body framed in a quadrangular shape and the pressing edges attached along the periphery thereof. The frame is formed by inserting a peripheral portion of a translucent plate made of the same quadrangular translucent synthetic resin into the opening and fixing the upper side of the translucent plate to the frame with bolts. There has also been proposed a sound insulating board in which a translucent plate is held in the body.
[0006]
In this sound insulating plate, the translucent plate and the frame are only fixed by several bolts, and most of the translucent plate is simply inserted and held in the opening, so that the translucent plate expands and contracts. Can cope well. However, when a large impact load is applied to the light-transmitting plate due to a collision accident or the like, the corners of the rectangular light-transmitting plate are deeply inserted into the opening of the frame member. Since free elastic deformation is restricted and it is difficult to come out from the opening, there is still a problem that stress concentration partially occurs in the vicinity of the corner and breaks. Especially in the case where several places on the upper side of the translucent plate are fixed to the frame body by bolts, as in the sound insulating plate of the above-mentioned JP-A-7-11608, especially in the vicinity of the left and right corners of the fixed upper side. Since the free movement of the corners is restricted, destruction is likely to occur.
[0007]
In addition, when a polycarbonate plate is used as the translucent plate, in order to improve the weather resistance of the polycarbonate plate, an acrylic or silicone hard coat layer is generally formed on the surface. Is known to decrease due to the formation of the hard coat layer, it is necessary to particularly consider measures for preventing breakage due to stress concentration near the corners.
[0008]
Therefore, the present invention solves the above-mentioned problems by making it easy to remove the corner from the opening, and the translucent sound insulating plate that prevents the translucent plate from being destroyed even when a large impact load is applied to the translucent plate. Is intended to provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
That is, the translucent sound insulating board according to the present invention is a frame body in which a long frame material having an opening along the length direction is framed in a rectangular shape with the opening inside, and the inner peripheral shape is rectangular . And a translucent plate made of translucent synthetic resin is inserted into and held in the opening of the frame member, and the translucent plate has an outer peripheral shape. The corners of the corners of the synthetic resin plate, which is a rectangular shape larger than the inner peripheral shape , are cut off, and the edges of the corners from which the corners are cut out do not protrude from the inside of the opening. In addition, the corner is shallowly inserted into the opening by the amount of the cut corner .
[0010]
According to the present invention, the translucent plate made of translucent synthetic resin has its peripheral edge inserted into the opening of the frame material and held in the frame body. Can cope well.
[0011]
In addition, the corners of the corners of the translucent plate are cut off from the quadrangular shape, and the corners are inserted shallowly into the opening of the frame material by the cut corners, so that a large impact load is applied to the translucent plate. In this case, free elastic deformation in the vicinity of the corner of the translucent plate is not restricted so much, and the corner is easily removed from the opening, so that stress concentration is unlikely to occur in the vicinity of the corner. , Prevented from destruction.
[0012]
In the present invention, the shape of the corner corner cut-out is not particularly limited, but if it is cut into a square, the edge effect may act on it and become the starting point of cracking. preferable.
[0013]
In the present invention, the number of corners from which corners are cut off is not particularly limited, and may be one corner or two or more corners. When the frame is fixed to the frame member, it is effective to cut off at least the corners of the two corners because the two corners of the side are particularly restricted from elastic deformation and are difficult to be removed from the opening. Moreover, it is preferable that the cut shape is cut obliquely so as not to be the starting point of cracking for the reason described above.
[0014]
Further, when at least two sides of the peripheral edge of the translucent plate are fixed to the frame member via the fixture, elastic deformation is restricted at all four corners and it is difficult to come out from the opening. It is preferable to cut all corners diagonally.
[0015]
In the present invention, even if a large impact load is applied to the translucent plate as described above, the translucent plate is prevented from being destroyed. Therefore, an acrylic or silicone hard coat layer is formed on the surface as the translucent plate. If the polycarbonate plate is used, the weather resistance of the light-transmitting plate can be improved by the hard coat layer while preventing the light-transmitting plate from being broken by cutting off corners.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
1 is a front view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, FIG. 3 is a transverse sectional view of FIG. 1, and FIG. 4 is a sectional view of an edging member used in FIG. FIG. 5 is a front view of the translucent plate used in FIG.
[0017]
1 to 5, reference numeral 1 denotes a frame, and reference numeral 2 denotes a frame constituting the frame 1, which is composed of left and right vertical frame members 2 a and 2 b and upper and lower horizontal frame members 2 c and 2 d. . 3 is a translucent plate.
[0018]
The frame material 2 is preferably an aluminum alloy that is lightweight, excellent in strength and corrosion resistance, and a hollow long shape material having an appropriate shape such as a circular shape, a square shape, or a polygonal shape using a metal such as iron or FRP resin. An opening 21 is formed on one side surface along the length direction. And the long frame material 2 in which the opening part 21 was formed along this length direction is framed in the shape of a rectangle by welding means, screwing, etc. suitably with the opening part 21 inside, and the frame body 1 is formed. Has been. The opening 21 may be integrally formed with the frame member 2 as described above, or the opening 21 may be formed by attaching a separate pressing edge or the like to the frame member 2.
[0019]
The light-transmitting plate 3 is formed of a light-transmitting synthetic resin, and a synthetic resin plate made of an appropriate material made of polycarbonate, acrylic resin, hard polyvinyl chloride, or the like, or a composite thereof, is generally used. A good polycarbonate plate is preferably used. When a polycarbonate plate is used, an acrylic or silicone hard coat layer is formed on the polycarbonate plate, and the hard coat layer increases the surface hardness to make it less likely to be scratched, and also improves the weather resistance. It is preferable to leave.
[0020]
Reference numeral 4 denotes an edging member made of an elastic material such as rubber or soft synthetic resin, which is mounted along the peripheral edge of the translucent plate 3. As shown in FIG. 4, the fringing member 4 has a substantially U-shaped cross section and is formed with a groove 41 along the longitudinal direction, and a wedge-shaped protrusion that can be easily elastically deformed on the outer surface. A plurality of protrusions 42 are provided along the longitudinal direction. The edge of the light transmitting plate 3 is inserted into the groove 41 so that the groove is mounted along the edge of the light transmitting plate 3.
[0021]
The peripheral portion of the translucent plate 3 to which the rimming member 4 is attached is inserted and inserted into the opening 21 of the frame member 2 in a state where the wedge-shaped protrusion 42 of the rimming member 4 is compressed. Several places on the upper side of the translucent plate are fixed to the upper horizontal frame member 2c via a fixing tool 5 such as a bolt. The rimming member 4 suppresses the vibration of the translucent plate 3 and is protected by the rimming member 4 even if it vibrates, so that the peripheral edge is not damaged and noise is not generated. Of course, the translucent plate 3 may be inserted into the opening 21 as it is without using the edging member 4.
[0022]
Further, in this embodiment, the translucent plate 3 is formed by obliquely cutting off the corners 32 of the left and right two corners 31 of the fixed upper side among the four corners of the square shape. Although the cut-out shape is not particularly limited, the corners 32 of the two corners 31 are cut off because the two left and right corners 31 on the fixed upper side are particularly restricted from free elastic deformation and from the opening 21. This is because it becomes difficult to come off, which leads to destruction, so that at least the corners 32 of the two corners 31 are cut off to make it easier to come off. Therefore, in order to facilitate removal, the shape to be cut out is an elongated triangular shape, that is, the cut in the horizontal direction is within the insertion dimension of the opening 21 so that the cut portion fits in the opening 21. It is preferable to cut as long as possible in the vertical direction. In this embodiment, the light transmitting plate 3 is cut obliquely to about ¼ of the vertical dimension.
[0023]
In addition, unlike the above, as shown in FIG. 6, it may be cut diagonally over the entire vertical dimension, and besides the diagonal cut, the corner 32 is cut vertically in the vertical direction as shown in FIG. It may be rounded so as not to become. The edge corner 31 corners 32 cut away is adapted not to protrude out of the opening inside 21. If it protrudes outside, it is not aesthetically pleasing and sound leaks from there.
[0024]
In addition, not only the left and right two corners 31 of the upper side, but also all the corners 32 of the four corners 31 may be cut as shown in FIGS. 8 and 9, and the cut shape is not particularly limited. It is preferable to be cut obliquely as described above. In the case where at least two sides of the peripheral edge of the translucent plate 3 are fixed to the frame member 2 via the fixture 5, free elastic deformation is restricted at all the four corners 31 and the opening 21 is removed. Although it becomes difficult, these problems are solved by cutting off all the corners 32 of the four corners 31.
[0025]
Although the said form is a case where either edge | side of the peripheral part of the translucent board 3 is being fixed by the fixing tool 5 grade | etc., This invention is not limited to the said form, The translucent board 3 is made into the frame material 2. It is effective even when the entire peripheral edge is simply inserted into the opening 21 without being fixed. That is, even if the light transmitting plate 3 is not fixed to the frame member 2 at all, if there is a corner 32 of the corner 31, the light transmission plate 3 is restricted from elastic deformation near the corner 31 by the corner 32. In order to make it difficult to remove from the opening 21, as illustrated above, by cutting off the corner 32 of the corner 31, these problems are solved, and a large impact load is applied to the translucent plate 3. Moreover, destruction of the light-transmitting plate 3 is effectively prevented.
[0026]
Next, an impact test will be described.
First, a polycarbonate plate having a thickness of 8 mm on which a silicone hard coat layer is formed is used as the translucent plate 3, and the corners 32 of the two left and right corners 31 on the upper side of the translucent plate 3 are cut off obliquely. The translucent sound insulation board as an embodiment according to the present invention configured as shown in 1 to 5 was manufactured, and as a comparative example, the corner 32 of the corner 31 of the translucent board 3 was not cut off. A conventional translucent sound insulation board which is the same as the example was prepared.
[0027]
About this example and a comparative example, when the surface of the translucent plate 3 was leveled and a weight of 300 kg was dropped on the translucent plate from a height of 95 cm, the damaged state of the translucent plate 3 was confirmed. The translucent plate 3 was broken in the conventional example in which the corner 32 of the corner portion 31 was not cut off, but was not broken in the embodiment in which the corner 32 of the corner portion 31 was cut off.
[0028]
【The invention's effect】
According to the present invention, the translucent plate made of translucent synthetic resin has its peripheral edge inserted into the opening of the frame material and held in the frame body. Can cope well.
[0029]
In addition, the corners of the corners of the translucent plate are cut off from the quadrangular shape, and the corners are inserted shallowly into the opening of the frame material by the cut corners, so that a large impact load is applied to the translucent plate. In this case, free elastic deformation in the vicinity of the corner of the light-transmitting plate is not so limited, and the corner is easily removed from the opening, so that stress concentration is unlikely to occur in the vicinity of the corner. , Prevented from destruction.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of FIG.
3 is a cross-sectional view of FIG.
4 is a cross-sectional view of the edging member used in FIG. 1. FIG.
FIG. 5 is a front view of the translucent plate used in FIG. 1;
FIG. 6 is a front view showing another embodiment of the translucent plate used in the present invention.
FIG. 7 is a front view showing another embodiment of the translucent plate used in the present invention.
FIG. 8 is a front view showing another embodiment of the translucent plate used in the present invention.
FIG. 9 is a front view showing another embodiment of the translucent plate used in the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 2 Frame material 2a Left vertical frame material 2b Right vertical frame material 2c Upper horizontal frame material 2d Lower horizontal frame material 21 Opening part 3 Translucent plate 31 Corner 32 Corner 4 Edge member 41 Groove 42 Projection 5 Fixing tool

Claims (5)

A long frame material having an opening along the length direction is framed in a rectangular shape with the opening inside, and a frame having an inner peripheral shape is formed into a rectangular shape. Synthetic resin in which a translucent plate made of resin is held with its peripheral edge inserted into the opening of the frame material, and the translucent plate has a larger outer peripheral shape than the inner peripheral shape of the frame body The corners of the plate are cut off at the corners, and the edges of the corners from which the corners are cut out are not protruded from the inside of the opening and are cut by the cut corners. The light-transmitting sound insulation board, wherein the corner is inserted into the opening shallowly .   The translucent sound insulation board according to claim 1, wherein corners of the corners of the translucent board are cut obliquely.   The translucent plate is characterized in that one side of the peripheral portion is fixed to the frame member via a fixture, and the corners of the two corners of the side are cut off obliquely. Translucent sound insulation board.   The translucent plate is characterized in that at least two sides or more of the peripheral edge thereof are fixed to the frame member via a fixture, and all the corners of the four corners are cut obliquely. The translucent sound insulation board as described.   The light-transmitting sound insulating board according to claim 1, 2, 3, or 4, wherein the light-transmitting board has an acrylic or silicone hard coat layer formed on the surface of a polycarbonate board.

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