JPH11172636A - Transmittable sound insulation plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-transmittable sound insulation plate preventing breakage of a light-transmittable plate even if a large impact load is applied on the plate. SOLUTION: With regard to a light-transmittable plate 3 in which the opening part of a long frame material having the opening part along the length direction is made an inside to be assembled in the form of a rectangular shape so as to form a frame body 1 and comprising light guide synthetic resin in the frame body 1, the circumferential edge is held to be inserted in the opening part of a frame body 2, and the light-transmittable plate 3 is made a shape cutting the angle of a corner part 31 from a rectangular shape. Since the corner part is shallowly inserted in the opening part of the frame body 2 by only the cut part, stress concentration is difficult to occur even in the neighborhood of the corner part 31 and breakage is prevented without largely regulating free elastic deformation of the light-transmittable plate 3 in the case where large impact load is applied on the plate and because the corner part is easy to slip off from the opening part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-transmitting sound insulating plate mainly installed along a road or a railroad for the purpose of sound insulation.

[0002]

2. Description of the Related Art In order to cut off noise from vehicles, sound insulation plates are installed along roads and railways. Some of such sound insulating plates are formed of a light opaque sound insulating plate such as PC concrete or metal, but those formed of a light opaque sound insulating plate have excellent sound insulating properties, but are installed on an elevated road. In this case, there is a problem in that the weight becomes heavy in relation to the foundation serving as a base portion, and the surrounding scenery is obstructed by the opacity, so that there is a feeling of oppression and the scenery is poor.

[0003]

Therefore, in recent years, sound insulation formed from a light-transmitting plate made of a light-transmitting synthetic resin such as polycarbonate having a light-transmitting property has been attempted in recent years so as to reduce the weight and to prevent the surrounding scenery from being obstructed. Boards are being used abundantly. Conventionally, as such a light-transmitting sound-insulating plate, there is a light-transmitting sound insulating plate in which the same rectangular light-transmitting plate is bolted to the entire front surface of a rectangular frame formed by a metal frame material having an L-shaped cross section.

However, in the case where a light transmitting plate is bolted to the front surface of a metal frame, the light transmitting plate is made of a metal frame and a light transmitting plate made of a light transmitting synthetic resin. There is a problem that the light transmitting plate is wavy and easily distorted due to expansion and contraction. In addition, since the entire periphery of the light-transmitting plate is fixed to the frame, if a large impact load is applied to the light-transmitting plate in a recent collision accident caused by speeding up of a traveling vehicle or a collision accident of a large crane truck, etc. In some cases, the light-transmitting plate is broken and fragments thereof are scattered. In addition, when installed on an elevated road or the like having a railway or a road below the sound insulating plate, there is a danger that broken pieces of the light transmitting plate will fall and cause a secondary disaster.

Therefore, in order to cope with expansion and contraction of the light transmitting plate, as described in JP-A-7-11608,
An opening is formed between the frame framed in a rectangular shape and the ridge attached along the periphery, and the peripheral edge of a light-transmitting plate made of the same rectangular transparent synthetic resin is inserted into the opening. In addition, there has been proposed a sound insulating plate in which the light transmitting plate is held in the frame by fixing several places on the upper side of the light transmitting plate to the frame with bolts.

In this sound insulating plate, the light transmitting plate and the frame are fixed only by bolts at several places, and most of the light transmitting plate is simply inserted and held in the opening. In addition, shrinkage can be dealt with sufficiently. 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 square light-transmitting plate are deeply inserted into the openings of the frame material, so that the light-transmitting plate is Since free elastic deformation is regulated and it is hard to come out of the opening, there is still a problem that a stress concentration is partially generated near the corner and the corner is broken. In particular, Japanese Patent Application Laid-Open No. 7-116
In the case where several places on the upper side of the light-transmitting plate are fixed to the frame by bolts, as in the sound insulating plate of JP 08-08, the free movement of the corners especially near the left and right corners of the fixed upper side. Is regulated so that destruction is likely to occur.

When a polycarbonate plate is used as the light-transmitting plate, an acrylic or silicone hard coat layer is generally formed on the surface of the polycarbonate plate in order to improve the weather resistance of the polycarbonate plate. Since it is known that the impact resistance is reduced by the formation of the hard coat layer, it is necessary to particularly consider a measure for preventing destruction due to stress concentration near the corner.

Therefore, the present invention solves the above-mentioned problems by facilitating the removal of the corner from the opening, and prevents the light-transmitting plate from being broken even when a large impact load is applied to the light-transmitting plate. It is intended to provide a sex sound insulating plate.

[0009]

In order to achieve the above object, the present invention has the following arrangement. That is, in the light-transmitting sound insulating plate according to the present invention, a long frame material having an opening along the length direction is framed in a square shape with the opening inside, and a frame is formed, and the light-transmitting light is transmitted in the frame. A light-transmitting plate made of a conductive synthetic resin is inserted into and held at the peripheral edge of the opening in the frame material, and the light-transmitting plate has a shape in which a corner of a corner is cut off from a square shape. It is characterized by the following.

According to the present invention, the light-transmitting plate made of light-transmitting synthetic resin has its peripheral edge inserted into the opening of the frame material and held inside the frame, so that the light-transmitting plate expands. In addition, shrinkage can be dealt with sufficiently.

Moreover, since the light-transmitting plate has a rectangular shape, the corners of the corners are cut off, and the corners are inserted shallowly into the opening of the frame material by the cut-off corners. When a load is applied, free elastic deformation in the vicinity of the corner of the light-transmitting plate is not so much restricted, and since the corner is easily released from the opening, stress concentration also occurs near this corner. Less likely to occur and prevented from destruction.

In the present invention, the shape of the cut corner is not particularly limited. However, if the cut corner is cut into a square shape, an edge effect may be exerted on the cut corner to form a crack starting point. Preferably, it is cut off.

In the present invention, the number of corners to be cut off is not particularly limited, and may be one corner or two or more corners. In the case of being fixed to the frame material through the fixture, the two corners of the side are particularly restricted from being elastically deformed and are difficult to come out of the opening, so it is effective to cut off at least the corners of the two corners. It is preferable that the cut shape is cut obliquely so as not to be the starting point of the crack for the above-mentioned reason.

When at least two or more sides of the peripheral edge of the light-transmitting plate are fixed to the frame material via the fixture, elastic deformation is restricted at all four corners, and it is difficult to fall out of the opening. Preferably, all four corners are cut off diagonally.

In the present invention, since the light-transmitting plate is prevented from destruction even when a large impact load is applied to the light-transmitting plate as described above, an acrylic or silicone hard coat layer is formed on the surface of the light-transmitting plate. When the polycarbonate plate formed with 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 the corners.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of FIG.
1 is a cross-sectional view of FIG. 1, FIG. 4 is a cross-sectional view of the edging member used in FIG. 1, and FIG. 5 is a front view of the light-transmitting plate used in FIG.

In FIGS. 1 to 5, reference numeral 1 denotes a frame, 2 denotes a frame constituting the frame 1, and left and right vertical frame members 2a,
2b and upper and lower horizontal frame members 2c and 2d.
Reference numeral 3 denotes a light transmitting plate.

The frame member 2 is preferably made of an aluminum alloy which is preferably lightweight and has excellent strength and corrosion resistance, or a metal such as iron or F
It is formed of a hollow elongated member having an appropriate shape such as a circular cross section, a square, or a polygon using RP resin or the like, and has an opening 21 formed on one side along the length direction. Then, the long frame member 2 having the opening 21 formed along the length direction is framed in a square shape by welding or screwing or the like by a suitable joining means with the opening 21 inside, thereby forming the frame 1. Have been. The opening 21 may be formed integrally with the frame material 2 as described above, or the opening 21 may be formed by attaching a separate pressing edge or the like to the frame material 2.

The light transmitting plate 3 is formed of a light transmitting synthetic resin.
A synthetic resin plate of an appropriate material made of polycarbonate, acrylic resin, hard polyvinyl chloride or the like, or a composite of these materials is used. In general, a polycarbonate plate having excellent impact resistance is preferably used. In the case where 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 hard to be scratched and improves weather resistance. It is preferable to keep it.

Reference numeral 4 denotes a rim member formed of an elastic material such as rubber or soft synthetic resin mounted along the peripheral portion of the light transmitting plate 3. As shown in FIG. 4, this edging member 4 has a substantially U-shaped cross section, has a concave groove 41 formed in the longitudinal direction, and has a wedge-shaped ridge which 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 light-transmitting plate 3 is mounted along the edge of the light-transmitting plate 3.

The peripheral edge of the light transmitting plate 3 on which the edging member 4 is mounted is inserted into the opening 21 of the frame member 2 with the wedge-shaped ridge 42 of the edging member 4 compressed. Several places on the upper side of the inserted translucent plate are fixed to the upper horizontal frame member 2c via fixing members 5 such as bolts. In addition, the vibration of the light transmitting plate 3 is suppressed by the edging member 4, and even if the light is transmitted, the light is protected by the edging member 4, so that the peripheral portion is not damaged and noise is not generated. Of course, the light-transmitting plate 3
May be inserted into the opening 21 as it is.

Further, in the present embodiment, the light transmitting plate 3 is formed of two corners 3 on the left and right sides of the fixed upper side among the four corners of the square shape.
One corner 32 is cut off diagonally. The cut shape is not particularly limited, but the corner 32 of the two corners 31 is cut off because the left and right two corners 31 of the fixed upper side are particularly restricted from elastic deformation and from the opening 21. This is because it is difficult to come off, which leads to destruction, so that at least the corners 32 of the two corners 31 are cut out to make it easy to come out. Therefore, in order to facilitate removal, the cut-out shape is an elongated triangular shape, that is, the cut-out in the horizontal direction is within the insertion dimension of the opening 21 so that the cut-out portion fits in the opening 21, and 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 1/4 of the vertical dimension.

In addition, unlike the above, it may be cut obliquely over the entire vertical dimension as shown in FIG. 6, or, other than diagonally, the corner 32 may be cut vertically in the vertical direction as shown in FIG. May be rounded so as not to be an edge. Corner 3 with corner 32 cut out
It is preferable that the edge of 1 does not protrude from the inside of the opening 21. If it protrudes outside, it is not aesthetically pleasing, and sound leaks from it.

In addition, as shown in FIGS. 8 and 9, not only the right and left corners 31 of the upper side but also all the corners 32 of the four corners 31 may be cut off. However, it is preferably cut off diagonally as described above. When at least two sides of the periphery of the light-transmitting plate 3 are fixed to the frame member 2 via the fixtures 5, free elastic deformation is restricted at all four corners 31, and the transparent member 3 comes out of the opening 21. It becomes difficult, but 4 corners 3
1 By cutting off all the corners 32, these problems are eliminated.

In the above embodiment, one of the sides of the peripheral portion of the light transmitting plate 3 is fixed by the fixture 5 or the like.
The present invention is not limited to the above-described embodiment, and is effective even in a case where the light transmitting plate 3 is not fixed to the frame member 2 and the entire peripheral edge is simply inserted into the opening 21. That is, the light transmitting plate 3
Even if it is not fixed to the frame member 2 at all, if there is a corner 32 of the corner portion 31, the light-transmitting plate 3 is formed by the corner 32 by the corner 32.
Since the elastic deformation in the vicinity is restricted and it is difficult to come out from the opening 21, the corner 3 of the corner 31
By cutting off 2, these problems are solved, and even when a large impact load is applied to the light transmitting plate 3, the destruction of the light transmitting plate 3 is effectively prevented.

Next, the impact test will be described. First, a polycarbonate plate having a thickness of 8 mm on which a silicone-based hard coat layer is formed is used as the light-transmitting plate 3, and corners 32 of two left and right corners 31 on the upper side of the light-transmitting plate 3 are cut off obliquely. 1 to 5, a light-transmitting sound-insulating plate as an example according to the present invention was manufactured, and as a comparative example, a corner 32 of a corner 31 of the light-transmitting plate 3 was not cut out. A conventional translucent sound insulating plate that was the same as the example was produced.

In this embodiment and the comparative example, the surface of the light transmitting plate 3 was made horizontal, and a height of 95 cm above the light transmitting plate 3 was set.
When the weight of 00 kg was dropped on the light-transmitting plate and the state of damage of the light-transmitting plate 3 was confirmed, the light-transmitting plate 3 was broken in the conventional example in which the corner 32 of the corner 31 was not cut off. In the example in which the corner 32 was cut off, it was not broken.

[0028]

According to the present invention, the light-transmitting plate made of a light-transmitting synthetic resin is inserted into the opening of the frame material and held in the frame, so that the light-transmitting plate is provided. Expansion and contraction can be adequately dealt with.

Moreover, since the light-transmitting plate has a rectangular shape, the corners of the corners are cut off, and the corners are inserted shallowly into the openings of the frame material by the cut-off corners. When a load is applied, free elastic deformation in the vicinity of the corner of the light-transmitting plate is not so much restricted, and since the corner is easily released from the opening, stress concentration also occurs near this corner. Less likely to occur and 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.

FIG. 3 is a cross-sectional view of FIG.

FIG. 4 is a sectional view of the edging member used in FIG. 1;

FIG. 5 is a front view of the light transmitting plate used in FIG.

FIG. 6 is a front view showing another embodiment of the light transmitting plate used in the present invention.

FIG. 7 is a front view showing another embodiment of the light transmitting plate used in the present invention.

FIG. 8 is a front view showing another embodiment of the light transmitting plate used in the present invention.

FIG. 9 is a front view showing another embodiment of the light transmitting 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 3 Translucent plate 31 Corner 32 Square corner 4 Edge member 41 Groove 42 Ridge 5 Fixing tool

Claims (5)

[Claims] 1. A long frame material having an opening along the length direction is framed in a square shape with the opening inside, and a frame is formed, and a light transmitting material made of a light-transmitting synthetic resin is formed in the frame. The light-transmitting plate is characterized in that the peripheral portion is inserted into and held in the opening of the frame material, and the light-transmitting plate has a shape in which a corner of a corner is cut off from a square shape. Sound insulation board. 2. The light-transmitting sound insulating plate according to claim 1, wherein corners of corners of the light transmitting plate are cut off obliquely. 3. The light transmitting plate according to claim 1, wherein one side of the peripheral portion is fixed to the frame material via a fixing tool, and two corners of the side are cut off obliquely. Item 3. A translucent sound insulating plate according to item 1 or 2. 4. The light-transmitting plate is characterized in that at least two or more sides of its peripheral edge are fixed to a frame material via a fixture, and all four corners are obliquely cut off. The translucent sound insulating plate according to claim 1. 5. The translucent plate according to claim 1, wherein the translucent plate is formed by forming an acrylic or silicone hard coat layer on the surface of a polycarbonate plate. Sound insulation board.